JavaWeb实现裁剪图片上传完整代码

本文实例为大家分享了JavaWeb实现裁剪图片上传完整案例，供大家参考，具体内容如下

实现思路

•使用jcrop插件手机要裁剪图片的坐标
•将收集到的参数传递到后台，在后台使用java图形对象绘制图像进行裁剪
◦后台处理流程：
1、将上传的图片按按照比例进行压缩后上传到文件服务器，并且将压缩后的图片保存在本地临时目录中。
2、将压缩后的图片回显到页面，使用jcrop进行裁剪，手机裁剪坐标（x,y,width,height）
■@paramx 目标切片起点坐标X
■@param y 目标切片起点坐标Y
■@param width 目标切片宽度
■@param height 目标切片高度
3、后台处理裁剪裁剪，重新上传

jsp页面

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									<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

									<%@ page contentType="text/html;charset=UTF-8" language="java" %>

									<!doctype html>

									<html>

									<head>

									  <meta http-equiv="content-type" content="text/html; charset=UTF-8"/>

									  <title>上传用户头像</title>

									  <link href="${pageContext.request.contextPath}/js/cutImg/css/master.css" rel="stylesheet" />

									  <link href="${pageContext.request.contextPath}/js/cutImg/css/upload.css" rel="stylesheet" />

									  <link href="${pageContext.request.contextPath}/js/cutImg/css/jquery.rollbar.css" rel="stylesheet" />

									  <link href="${pageContext.request.contextPath}/js/cutImg/css/jquery.Jcrop.css" rel="stylesheet" />

									</head>

									<body>

									<div class="user_upload">

									  <form id="uploadImgFrom" enctype="multipart/form-data" method="post">

									    <div class="upload">

									      <div class="upload_left">

									        <div class="pic">

									          <div class="pic2" id="pic2" >

									            <div id="uploadFile">

									              <div class="upload_btn" style="margin-left: 75px;">

									                <a href="javascript:;" id="upText" style="color:red;">上传头像</a>

									              </div>

									              <p>

									                支持jpg、png格式<br />

									                图片小于2M

									              </p>

									            </div>

									            <!--回显示图片-->

									            <img src="" name="photo" id="originalImg" alt=""/>

									          </div>

									        </div>

									        <p class="up_reload" id="up_reload" style="display: none;">

									          <a href="javascript:;" style="color: red">重新上传</a>

									        </p>

									        <input type="hidden" name="picval" id="picval" />

									        <input type="hidden" name="origpicval" id="origpicval" value="" />

									        <input type="hidden" name="temporigpic" id="temporigpic" />

									        <input type="hidden" name="fileID" id="fileID" size="100" />

									        <input type="hidden" name="fileUrl" id="fileUrl" size="100" />

									        <input type="hidden" name="imgHeight" id="imgHeight" size="100" />

									        <input type="hidden" name="imgWidth" id="imgWidth" size="100" />

									      </div>

									      <div class="upload_right">

									        <div class="upload_view_pic" style="width: 300px; height: 230px; border: solid 1px #ccc; overflow: hidden;">

									          <img id="preview_1" src="${pageContext.request.contextPath}/images/4-3.jpg"/>

									        </div>

									        <p>

									          400 x 300像素

									        </p>

									        <%--<div class="upload_view_pic" style="width: 80px; height: 80px; border: solid 1px #ccc; overflow: hidden;">

									          <img id="preview_2" src=${pageContext.request.contextPath}/images/4-3.jpg />

									        </div>

									        <p>

									          80 x 80像素

									        </p>--%>

									        <p>

									          拖拽或缩放，生成自己满意的头像

									        </p>

									      </div>

									      <%-- <div id="img_description">

									        <textarea

									      </div>--%>

									      <div class="upload_b">

									        <font id="upalert"></font>

									      </div>

									    </div>

									    <input type="hidden" name="x" id="x" size="5" />

									    <input type="hidden" name="y" id="y" size="5" />

									    <input type="hidden" name="w" id="w" size="5" />

									    <input type="hidden" name="h" id="h" size="5" />

									    <input type="hidden" name="imgUrl" id="imgUrl"/>

									    <input type="hidden" name="imgId" id="imgId"/>

									    <div class="upload_submit_contain">

									      <div class="upload_submit" id="saveImage">

									        <a href="javascript:;" style="color: red">保存头像</a>

									      </div>

									    </div>

									  </form>

									</div>

									</body>

									<script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery.form.js"></script>

									<script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery.validate.min.js"></script>

									<script type="text/javascript" src="${pageContext.request.contextPath}/js/check.js"></script>

									<script src="${pageContext.request.contextPath}/js/cutImg/js/jquery-1.7.1.min.js" type="text/javascript"></script>

									<script src="${pageContext.request.contextPath}/js/cutImg/js/jquery.form.js" type="text/javascript"></script>

									<script src="${pageContext.request.contextPath}/js/cutImg/js/jquery-custom-file-input.js" type="text/javascript"></script>

									<script src="${pageContext.request.contextPath}/js/cutImg/js/jquery.Jcrop.js" type="text/javascript"></script>

									<script src="${pageContext.request.contextPath}/js/cutImg/js/jquery.rollbar.min.js" type="text/javascript"></script>

									<script src="${pageContext.request.contextPath}/js/cutImg/js/upload.ui.photos.js" type="text/javascript"></script>

									<script type="text/javascript" src="${pageContext.request.contextPath}/js/dialog/dialog.js?lib=false"></script>

									<script type="text/javascript">

									  photos.JcorpWidth = 400;//裁剪选择框宽度

									  photos.JcorpHeight = 300;//裁剪框选择高度

									//  photos.Widths = ["200", "80"];// 图片大小“宽”数组，根据图片张数由大到小定义不同图片的宽度

									//  photos.Heights = ["200", "80"];// 图片大小“高”数组，根据图片张数由大到小定义不同图片的高度

									  photos.UpLoad_FileID = "uploadFile";//上传组件属性ID

									  photos.UpLoad_FileTextID = "upText";//上传组件按钮文本ID

									  photos.UpLoad_AlertID = "upalert";//提示文本ID

									  photos.UpLoad_AlertClassName = "error";//提示文本增加的样式

									  photos.Upload_FormID = "uploadImgFrom";//上传组件表单ID

									  photos.UpLoad_OriginFileID = "originalImg";//底图图片ID

									  photos.UpLoad_ReLoadID = "up_reload";//重新上传组件ID

									  photos.UpLoad_PicValueID = "picval";//上传的底图片内容ID

									  photos.UpLoad_PicFileID = "fileID";////上传图片id

									  photos.UpLoad_PicFileUrl = "fileUrl";////上传图片url

									  photos.UpLoad_PicImgHeight="imgHeight";//上传的底图高

									  photos.UpLoad_PicImgWidth="imgWidth";//上传的底图宽

									  photos.UpLoad_TempOriginValueID = "temporigpic";//本页面重新上传时的原图片内容ID

									  photos.UpLoad_OriginValueID = "origpicval";//其他页面进入时的原图片内容ID

									  photos.Upload_RollbarID = "pic2";//自定义滚动条ID

									  photos.UpLoad_SaveID = "saveImage";//图片保存按钮ID

									  photos.UpLoad_PreviewPreFix = "preview_";//多个不同尺寸小图的ID前缀名称，多个小图ID格式“前缀”+数字编号（从1开始），例：id="photos_preview1" ...

									  photos.ParentFileImgID = "imgUrl";//父级图片控件ID

									  photos.ParentFileValueID = "imgId";//父级图片地址控件ID

									  photos.XID = "x";//x

									  photos.YID = "y";//y

									  photos.WID = "w";//w

									  photos.HID = "h";//h

									  photos.UpText_Format = "抱歉，暂只支持 jpg、png、bmp 格式";//图片格式验证文本

									  /* photos.UpText_Size = "抱歉，图片大小不能超过2M";*///图片大小验证文本

									  /*photos.UpText_Error = "图片上传出错";//上传出错文本*/

									  photos.Url_Check = "/Enterprise/filescheck";//文件验证大小的地址

									  photos.Url_UpLoad = "/Enterprise/uploadphoto?up=original";//上传图片载入底图的地址

									  photos.Url_ReLoad = "";//重新上传的地址

									  photos.Url_Save = "/Enterprise/saveimg?up=save";//保存图片的地址

									</script>

									</html>

后台java代码

图片上传工具类

				?

									package com.shengya.service.utils;

									import com.shengya.service.ImgContants;

									import org.apache.commons.fileupload.disk.DiskFileItem;

									import org.springframework.web.multipart.MultipartFile;

									import org.springframework.web.multipart.commons.CommonsMultipartFile;

									import sun.misc.BASE64Encoder;

									import javax.crypto.Mac;

									import javax.crypto.SecretKey;

									import javax.crypto.spec.SecretKeySpec;

									import javax.imageio.ImageIO;

									import javax.imageio.ImageReadParam;

									import java.awt.*;

									import java.awt.geom.AffineTransform;

									import java.awt.image.AffineTransformOp;

									import java.awt.image.BufferedImage;

									import java.io.*;

									import java.net.HttpURLConnection;

									import java.net.URL;

									import java.net.URLEncoder;

									import java.util.ArrayList;

									/**

									 * @author Darcy

									 *     Created by Administrator on 2016/6/17.

									 */

									public class UploadUtils {

									  // public final static String RADIOURL = "http://211.102.216.237:8011/fileServer/webapi/Attachments/bio?";

									  public final static String RADIOURL = "http://192.168.1.15:8088/fileServer/webapi/Attachments/bio?";

									  public final static String URL = ImgContants.IMG_UPLOAD + "/file/UpLoadImage?";

									  public final static String FILEURL = ImgContants.IMG_UPLOAD + "/file/UpLoadFile?";

									  public final static String VEDIOURL = ImgContants.FILE_UPLOAD + "/file/UpLoadFile?";

									  public final static String CROPURL = ImgContants.IMG_UPLOAD + "/file/CropImage?";

									  private static byte[] readAsByteArr(InputStream is) {

									    ByteArrayOutputStream baos = new ByteArrayOutputStream();

									    try {

									      byte[] bytes = new byte[1024];

									      int length = 0;

									      while ((length = is.read(bytes)) != -1) {

									        baos.write(bytes, 0, length);

									      }

									      return baos.toByteArray();

									    } catch (Exception e) {

									      e.printStackTrace();

									    } finally {

									      try {

									        baos.close();

									      } catch (IOException e) {

									        e.printStackTrace();

									      }

									    }

									    return null;

									  }

									  /**

									   * 上传图片

									   *

									   * @param file

									   */

									  public static String submitImage(File file) throws UnsupportedEncodingException {

									    String fileName = URLEncoder.encode(file.getName(), "UTF-8");

									    long fileSize = file.length();

									    boolean isReSuffix = true;

									    int height = 0;

									    int width = 500;

									    String mark = "t";

									    String mode = "W";

									    String url = sign(URL)

									        + "&ChannelNo=muying_android"

									        + "&FileName="

									        + fileName

									        + "&FileSize="

									        + fileSize

									        + "&IsReSuffix="

									        + isReSuffix

									        + "&Height="

									        + height

									        + "&Width="

									        + width + "&Mark=" + mark + "&Mode=" + mode;

									    System.out.println("url:" + url);

									    HttpURLConnection conn = null;

									    OutputStream outStream = null;

									    BufferedInputStream bin = null;

									    try {

									      bin = new BufferedInputStream(new FileInputStream(file));

									      conn = (HttpURLConnection) new URL(url)

									          .openConnection();

									      conn.setConnectTimeout(15000);

									      conn.setRequestMethod("POST");

									      conn.setDoOutput(true);

									      // conn.setFixedLengthStreamingMode(file.length());

									      conn.setRequestProperty("Content-Type",

									          "application/x-www-form-urlencoded");

									      conn.setRequestProperty("Content-Length", file.length()

									          + "");

									      // conn.setRequestProperty("Range", "bytes="+"");

									      // 设置 HttpURLConnection的字符编码

									      conn.setRequestProperty("Accept-Charset", "UTF-8");

									      outStream = conn.getOutputStream();

									      byte[] buf = new byte[1024];

									      int len = 0;

									      int lenCount = 0;

									      while ((len = bin.read(buf)) != -1) {

									        outStream.write(buf, 0, len);//OK

									        lenCount = lenCount + len;

									      }

									      outStream.flush();

									      int responseCode = conn.getResponseCode();

									      if (responseCode == 200) {

									        InputStream inStream = conn.getInputStream();

									        byte[] data1 = readAsByteArr(inStream);

									        String json = new String(data1);

									        inStream.close();

									        return json;

									      } else {

									        InputStream inStream = conn.getInputStream();

									        byte[] data1 = readAsByteArr(inStream);

									        String json = new String(data1);

									        inStream.close();

									        return json;

									      }

									    } catch (Exception e) {

									      e.printStackTrace();

									    } finally {

									      try {

									        if (outStream != null) {

									          outStream.close();

									        }

									      } catch (IOException e) {

									        e.printStackTrace();

									      }

									    }

									    return null;

									  }

									  /**

									   * 上传图片

									   *

									   * @param file

									   */

									  public static String submitWebImage(MultipartFile file) throws UnsupportedEncodingException {

									    String fileName = URLEncoder.encode(file.getOriginalFilename(), "UTF-8");

									    long fileSize = file.getSize();

									    boolean isReSuffix = true;

									    int height = 0;

									    int width = 500;

									    String mark = "t";

									    String mode = "W";

									    String url = sign(URL)

									        + "&ChannelNo=muying_android"

									        + "&FileName="

									        + fileName

									        + "&FileSize="

									        + fileSize

									        + "&IsReSuffix="

									        + isReSuffix

									        + "&Height="

									        + height

									        + "&Width="

									        + width + "&Mark=" + mark + "&Mode=" + mode;

									    System.out.println("url:" + url);

									    HttpURLConnection conn = null;

									    OutputStream outStream = null;

									    BufferedInputStream bin = null;

									    try {

									      bin = new BufferedInputStream(file.getInputStream());

									      conn = (HttpURLConnection) new URL(url)

									          .openConnection();

									      conn.setConnectTimeout(15000);

									      conn.setRequestMethod("POST");

									      conn.setDoOutput(true);

									      // conn.setFixedLengthStreamingMode(file.length());

									      conn.setRequestProperty("Content-Type",

									          "application/x-www-form-urlencoded");

									      conn.setRequestProperty("Content-Length", file.getSize()

									          + "");

									      // conn.setRequestProperty("Range", "bytes="+"");

									      // 设置 HttpURLConnection的字符编码

									      conn.setRequestProperty("Accept-Charset", "UTF-8");

									      outStream = conn.getOutputStream();

									      byte[] buf = new byte[1024];

									      int len = 0;

									      int lenCount = 0;

									      while ((len = bin.read(buf)) != -1) {

									        outStream.write(buf, 0, len);//OK

									        lenCount = lenCount + len;

									      }

									      outStream.flush();

									      int responseCode = conn.getResponseCode();

									      if (responseCode == 200) {

									        InputStream inStream = conn.getInputStream();

									        byte[] data1 = readAsByteArr(inStream);

									        String json = new String(data1);

									        inStream.close();

									        return json;

									      } else {

									        InputStream inStream = conn.getInputStream();

									        byte[] data1 = readAsByteArr(inStream);

									        String json = new String(data1);

									        inStream.close();

									        return json;

									      }

									    } catch (Exception e) {

									      e.printStackTrace();

									    } finally {

									      try {

									        if (outStream != null) {

									          outStream.close();

									        }

									      } catch (IOException e) {

									        e.printStackTrace();

									      }

									    }

									    return null;

									  }

									  /**

									   * 上传视频

									   *

									   * @param file

									   */

									  public static String submitRadio(MultipartFile file) throws Exception {

									    String url = signRadio(RADIOURL);

									    System.out.println("url:" + url);

									    HttpURLConnection conn = null;

									    OutputStream outStream = null;

									    BufferedInputStream bin = null;

									    try {

									      bin = new BufferedInputStream(file.getInputStream());

									      conn = (HttpURLConnection) new URL(url)

									          .openConnection();

									      conn.setConnectTimeout(15000);

									      conn.setRequestMethod("POST");

									      conn.setDoOutput(true);

									      conn.setRequestProperty("Content-Type",

									          "application/x-www-form-urlencoded");

									      conn.setRequestProperty("Content-Length", file.getSize()

									          + "");

									      conn.setRequestProperty("Accept-Charset", "UTF-8");

									      outStream = conn.getOutputStream();

									      byte[] buf = new byte[1024];

									      int len = 0;

									      int lenCount = 0;

									      while ((len = bin.read(buf)) != -1) {

									        outStream.write(buf, 0, len);//OK

									        lenCount = lenCount + len;

									      }

									      outStream.flush();

									      int responseCode = conn.getResponseCode();

									      if (responseCode == 200) {

									        InputStream inStream = conn.getInputStream();

									        byte[] data1 = readAsByteArr(inStream);

									        String json = new String(data1);

									        inStream.close();

									        return json;

									      } else {

									        InputStream inStream = conn.getInputStream();

									        byte[] data1 = readAsByteArr(inStream);

									        String json = new String(data1);

									        inStream.close();

									        return json;

									      }

									    } catch (Exception e) {

									      e.printStackTrace();

									    } finally {

									      try {

									        if (outStream != null) {

									          outStream.close();

									        }

									      } catch (IOException e) {

									        e.printStackTrace();

									      }

									    }

									    return null;

									  }

									  /**

									   * 上传简历快照

									   *

									   * @param fileName

									   * @param content

									   * @return

									   * @throws UnsupportedEncodingException

									   */

									  public static String submitFile(String fileName, String content) throws UnsupportedEncodingException {

									    //content = URLEncoder.encode(content, "UTF-8");

									    fileName = URLEncoder.encode(fileName, "UTF-8");

									    byte[] contentBytes = content.getBytes();

									    long fileSize = contentBytes.length;

									    boolean isReSuffix = true;

									    int height = 0;

									    int width = 500;

									    String mark = "t";

									    String mode = "W";

									    String url = sign(FILEURL)

									        + "&ChannelNo=muying_android"

									        + "&FileName="

									        + fileName

									        + "&FileSize="

									        + fileSize

									        + "&IsReSuffix="

									        + isReSuffix

									        + "&Height="

									        + height

									        + "&Width="

									        + width + "&Mark=" + mark + "&Mode=" + mode;

									    System.out.println("url:" + url);

									    HttpURLConnection conn = null;

									    OutputStream outStream = null;

									    BufferedInputStream bin = null;

									    try {

									      conn = (HttpURLConnection) new URL(url)

									          .openConnection();

									      conn.setConnectTimeout(15000);

									      conn.setRequestMethod("POST");

									      conn.setDoOutput(true);

									      // conn.setFixedLengthStreamingMode(file.length());

									      conn.setRequestProperty("Content-Type",

									          "application/x-www-form-urlencoded");

									      conn.setRequestProperty("Content-Length", content.length()

									          + "");

									      // conn.setRequestProperty("Range", "bytes="+"");

									      // 设置 HttpURLConnection的字符编码

									      conn.setRequestProperty("Accept-Charset", "UTF-8");

									      outStream = conn.getOutputStream();

									      outStream.write(contentBytes, 0, contentBytes.length);//OK

									      outStream.flush();

									      int responseCode = conn.getResponseCode();

									      if (responseCode == 200) {

									        InputStream inStream = conn.getInputStream();

									        byte[] data1 = readAsByteArr(inStream);

									        String json = new String(data1);

									        inStream.close();

									        return json;

									      } else {

									        InputStream inStream = conn.getInputStream();

									        byte[] data1 = readAsByteArr(inStream);

									        String json = new String(data1);

									        inStream.close();

									        return json;

									      }

									    } catch (Exception e) {

									      e.printStackTrace();

									    } finally {

									      try {

									        if (outStream != null) {

									          outStream.close();

									        }

									      } catch (IOException e) {

									        e.printStackTrace();

									      }

									    }

									    return null;

									  }

									  /**

									   * 上传附件

									   *

									   * @return json 字符串

									   * @throws UnsupportedEncodingException

									   */

									  public static String submitFile(MultipartFile file) throws UnsupportedEncodingException {

									    String fileName = URLEncoder.encode(file.getOriginalFilename(), "UTF-8");

									    long fileSize = file.getSize();

									    boolean isReSuffix = true;

									    int height = 0;

									    int width = 500;

									    String mark = "t";

									    String mode = "W";

									    String url = sign(FILEURL)

									        + "&ChannelNo=muying_android"

									        + "&FileName="

									        + fileName

									        + "&FileSize="

									        + fileSize

									        + "&IsReSuffix="

									        + isReSuffix

									        + "&Height="

									        + height

									        + "&Width="

									        + width + "&Mark=" + mark + "&Mode=" + mode;

									    System.out.println("url:" + url);

									    HttpURLConnection conn = null;

									    OutputStream outStream = null;

									    BufferedInputStream bin = null;

									    try {

									      bin = new BufferedInputStream(file.getInputStream());

									      conn = (HttpURLConnection) new URL(url)

									          .openConnection();

									      conn.setConnectTimeout(15000);

									      conn.setRequestMethod("POST");

									      conn.setDoOutput(true);

									      // conn.setFixedLengthStreamingMode(file.length());

									      conn.setRequestProperty("Content-Type",

									          "application/x-www-form-urlencoded");

									      conn.setRequestProperty("Content-Length", file.getSize()

									          + "");

									      // conn.setRequestProperty("Range", "bytes="+"");

									      // 设置 HttpURLConnection的字符编码

									      conn.setRequestProperty("Accept-Charset", "UTF-8");

									      outStream = conn.getOutputStream();

									      byte[] buf = new byte[1024];

									      int len = 0;

									      int lenCount = 0;

									      while ((len = bin.read(buf)) != -1) {

									        outStream.write(buf, 0, len);//OK

									        lenCount = lenCount + len;

									      }

									      int responseCode = conn.getResponseCode();

									      if (responseCode == 200) {

									        InputStream inStream = conn.getInputStream();

									        byte[] data1 = readAsByteArr(inStream);

									        String json = new String(data1);

									        inStream.close();

									        return json;

									      } else {

									        InputStream inStream = conn.getInputStream();

									        byte[] data1 = readAsByteArr(inStream);

									        String json = new String(data1);

									        inStream.close();

									        return json;

									      }

									    } catch (Exception e) {

									      e.printStackTrace();

									    } finally {

									      try {

									        if (outStream != null) {

									          outStream.close();

									        }

									      } catch (IOException e) {

									        e.printStackTrace();

									      }

									    }

									    return null;

									  }

									  private static String sign(String baseurl) throws UnsupportedEncodingException {

									    long currebttime = System.currentTimeMillis();

									    long timeStamp = currebttime / 1000;

									    String data = "ActionName=UpLoadImage" + "&SecretKey=4b19f08dbf0adb82ce9cc7c207ec1dc9"

									        + "&TimeStamp=" + timeStamp;

									    String signature = hmac_sha1("4b19f08dbf0adb82ce9cc7c207ec1dc9",

									        URLEncoder.encode(data, "UTF-8"));

									    signature = signature.replace("%3D", "%3d");

									    signature = signature.replace("%3A", "%3a");

									    signature = signature.replace("%2F", "%2f");

									    return baseurl + data + "&Signature=" + signature;

									  }

									  private static String signRadio(String url) throws Exception {

									    long currebttime = System.currentTimeMillis();

									    String data = "secretKey=f1b79c865c424be46183a2f0a49a0f15"

									        + "&timeStamp=" + currebttime;

									    System.out.println("url:" + url + data);

									    System.out.println("url = " + URLEncoder.encode(url + data, "utf-8"));

									    String signature = HmacSha1Util.getSignature(URLEncoder.encode(url + data, "utf-8"), "f1b79c865c424be46183a2f0a49a0f15");

									    return url + data + "&signature=" + signature;

									  }

									  private static String hmac_sha1(String key, String datas) {

									    String reString = "";

									    try {

									      datas = datas.replace("%3A", "%3a");

									      datas = datas.replace("%2F", "%2f");

									      datas = datas.replace("%3D", "%3d");

									      byte[] data = key.getBytes("UTF-8");

									      // 根据给定的字节数组构造一个密钥,第二参数指定一个密钥算法的名称

									      SecretKey secretKey = new SecretKeySpec(data, "HmacSHA1");

									      // 生成一个指定 Mac 算法 的 Mac 对象

									      Mac mac = Mac.getInstance("HmacSHA1");

									      // 用给定密钥初始化 Mac 对象

									      mac.init(secretKey);

									      byte[] text = datas.getBytes("UTF-8");

									      // 完成 Mac 操作

									      byte[] text1 = mac.doFinal(text);

									      reString = new BASE64Encoder().encodeBuffer(text1);

									      reString = URLEncoder.encode(reString, "UTF-8");

									      reString = reString.replace("%0A", "");

									      reString = reString.replace("%0D", "");

									    } catch (Exception e) {

									      e.printStackTrace();

									    }

									    return reString;

									  }

									  /**

									   * 上传裁剪图片

									   * zxiao 2016/09/01

									   *

									   * @param fileID

									   */

									  public static String submitCutedWebImage(MultipartFile file,String fileID,String x,String y,String w,String h) throws UnsupportedEncodingException {

									    String FileId=fileID;

									    String[] CropWidths=new String[]{"50"};//裁剪宽度

									    //List<String> list=new List<String>();

									    //List<String> list = new ArrayList<String>(5);

									    ArrayList<String> listCropWidths = new ArrayList<String>();

									    listCropWidths.add("400");

									//    String[] CropHeights=new String[]{"50"};//裁剪高度

									    ArrayList<String> listCropHeights = new ArrayList<String>();

									    listCropHeights.add("300");

									    int CropX=Integer.parseInt(x);//裁剪x坐标

									    int CropY=Integer.parseInt(y);//裁剪y坐标

									//    String[] CropFixs=new String[]{"l"};//裁剪图片的标示集合

									    ArrayList<String> listCropFixs = new ArrayList<String>();

									    listCropFixs.add("l");

									    String SourceSuffix="jpg";//底图后缀

									    String SourceFix="";//底图标示

									    /* boolean isReSuffix = true;

									    int height = 1000;

									    int width = 750;

									    String mark = "t";

									    String mode = "W";*/

									    String url = sign(CROPURL) + "FileId="

									        + fileID

									        + "&CropWidths="

									        + listCropWidths

									        + "&CropHeights="

									        + listCropHeights

									        + "&CropX="

									        + CropX

									        + "&CropY="

									        + CropY + "&CropFixs=" + listCropFixs + "&SourceSuffix=" + SourceSuffix+ "&SourceFix=" + SourceFix;

									    System.out.println("url:" + url);

									    HttpURLConnection conn = null;

									    OutputStream outStream = null;

									    BufferedInputStream bin = null;

									    try {

									      bin = new BufferedInputStream(file.getInputStream());

									      conn = (HttpURLConnection) new URL(url)

									          .openConnection();

									      conn.setConnectTimeout(15000);

									      conn.setRequestMethod("POST");

									      conn.setDoOutput(true);

									      // conn.setFixedLengthStreamingMode(file.length());

									      conn.setRequestProperty("Content-Type",

									          "application/x-www-form-urlencoded");

									      conn.setRequestProperty("Content-Length", file.getSize()

									          + "");

									      // conn.setRequestProperty("Range", "bytes="+"");

									      // 设置 HttpURLConnection的字符编码

									      conn.setRequestProperty("Accept-Charset", "UTF-8");

									      outStream = conn.getOutputStream();

									      byte[] buf = new byte[1024];

									      int len = 0;

									      int lenCount = 0;

									      while ((len = bin.read(buf)) != -1) {

									        outStream.write(buf, 0, len);//OK

									        lenCount = lenCount + len;

									      }

									      int responseCode = conn.getResponseCode();

									      if (responseCode == 200) {

									        InputStream inStream = conn.getInputStream();

									        byte[] data1 = readAsByteArr(inStream);

									        String json = new String(data1);

									        inStream.close();

									        return json;

									      } else {

									        InputStream inStream = conn.getInputStream();

									        byte[] data1 = readAsByteArr(inStream);

									        String json = new String(data1);

									        inStream.close();

									        return json;

									      }

									    } catch (Exception e) {

									      e.printStackTrace();

									    } finally {

									      try {

									        if (outStream != null) {

									          outStream.close();

									        }

									      } catch (IOException e) {

									        e.printStackTrace();

									      }

									    }

									    return null;

									  }

									  /**上传裁剪后图片 需在本地保存副本

									   *zxiao 2016/09/01

									   * @param ，

									   * @param x

									   * @param y

									   * @param w

									   * @param h

									   * @return

									   * @throws IOException

									   */

									  public static String submitCropImage(MultipartFile file,Integer x,Integer y,Integer w,Integer h) throws IOException {

									    String folder=System.getProperty("java.io.tmpdir");

									    File tempDir =new File(folder);

									    //如果文件夹不存在则创建

									    if (!tempDir .exists() && !tempDir .isDirectory())

									    {

									//      System.out.println("//不存在");

									      tempDir .mkdir();

									    }

									    //压缩后临时文件

									    String Srcpath=folder+"scaleTemp.jpg";

									    //获取文件的后缀

									    /*File uploadFile = new File(Srcpath);

									    InputStream inputStream = file.getInputStream();

									    FileInputStream fs= (FileInputStream) inputStream;

									    String srcImg = URLEncoder.encode(file.getOriginalFilename(), "UTF-8");

									    String suffix=srcImg.substring(srcImg.lastIndexOf(".")+1);*/

									    //裁剪图片

									    cutImgUtils o = new cutImgUtils(x,y,w,h);

									    o.setSrcpath(Srcpath);

									    o.setSubpath(folder+"uptemp.jpg");

									    File tempFile = o.cut("jpg");

									    String s = submitImage(tempFile);

									    return s;

									  }

									  /**

									   * 获取上传图片的宽

									   * zxiao 2016/09/09

									   * @param file

									   * @return

									   */

									  public static int getImgWidth(MultipartFile file) throws IOException {

									    InputStream is = null;

									    BufferedImage src = null;

									    int ret = -1;

									    try {

									      is = file.getInputStream();

									      src = javax.imageio.ImageIO.read(is);

									      ret = src.getWidth(null); // 得到源图宽

									      is.close();

									    } catch (Exception e) {

									      e.printStackTrace();

									    }

									    return ret;

									  }

									  /**

									   * 获取上传图片的高

									   * zxiao 2016/09/09

									   * @param file

									   * @return

									   */

									  public static int getImgHeight(MultipartFile file) {

									    InputStream is = null;

									    BufferedImage src = null;

									    int ret = -1;

									    try {

									      is = file.getInputStream();

									      src = javax.imageio.ImageIO.read(is);

									      ret = src.getHeight(null); // 得到源图高

									      is.close();

									    } catch (Exception e) {

									      e.printStackTrace();

									    }

									    return ret;

									  }

									  /**

									   * 缩放图像（按高度和宽度缩放）

									   * @param file 文件对象

									   * @param result 缩放后的图像地址

									   * @param height 缩放后的高度

									   * @param width 缩放后的宽度

									   * @param bb 比例不对时是否需要补白：true为补白; false为不补白;

									   */

									  public static void scale(MultipartFile file, String result, int height, int width, boolean bb) {

									    try {

									      double ratio = 0.0; // 缩放比例

									      /*CommonsMultipartFile cf= (CommonsMultipartFile)file;

									      DiskFileItem fi = (DiskFileItem)cf.getFileItem();

									      File f = fi.getStoreLocation();*/

									//      File f = new File(srcImageFile);

									      InputStream inputStream = file.getInputStream();

									      BufferedImage bi = ImageIO.read(inputStream);

									      Image itemp = bi.getScaledInstance(width, height, bi.SCALE_SMOOTH);

									      // 计算比例

									      if ((bi.getHeight() > height) || (bi.getWidth() > width)) {

									        if (bi.getHeight() > bi.getWidth()) {

									          ratio = (new Integer(height)).doubleValue()

									              / bi.getHeight();

									        } else {

									          ratio = (new Integer(width)).doubleValue() / bi.getWidth();

									        }

									        AffineTransformOp op = new AffineTransformOp(AffineTransform

									            .getScaleInstance(ratio, ratio), null);

									        itemp = op.filter(bi, null);

									      }

									      if (bb) {//补白

									        BufferedImage image = new BufferedImage(width, height,

									            BufferedImage.TYPE_INT_RGB);

									        Graphics2D g = image.createGraphics();

									        g.setColor(Color.white);

									        g.fillRect(0, 0, width, height);

									        if (width == itemp.getWidth(null))

									          g.drawImage(itemp, 0, (height - itemp.getHeight(null)) / 2,

									              itemp.getWidth(null), itemp.getHeight(null),

									              Color.white, null);

									        else

									          g.drawImage(itemp, (width - itemp.getWidth(null)) / 2, 0,

									              itemp.getWidth(null), itemp.getHeight(null),

									              Color.white, null);

									        g.dispose();

									        itemp = image;

									      }

									      ImageIO.write((BufferedImage) itemp, "jpg", new File(result));

									    } catch (IOException e) {

									      e.printStackTrace();

									    }

									  }

									  public static void main(String[] args) {

									    try {

									      /* File file = new File("E:\\bole\\doc\\服务接口文档\\伯乐服务接口说明v1.0.docx");

									      System.out.println("file = " + file);

									      String json = submitFile(file);

									      System.out.println("json = " + json);*/

									    } catch (Exception e) {

									      e.printStackTrace();

									    }

									  }

									}

图片裁剪工具类

				?

									package com.shengya.service.utils;

									import javax.imageio.ImageIO;

									import javax.imageio.ImageReadParam;

									import javax.imageio.ImageReader;

									import javax.imageio.stream.ImageInputStream;

									import java.awt.*;

									import java.awt.image.BufferedImage;

									import java.io.File;

									import java.io.FileInputStream;

									import java.io.IOException;

									import java.util.Iterator;

									/**

									 * Created by Administrator on 2016/9/1.

									 */

									public class cutImgUtils {

									  // ===源图片路径名称如：c:\1.jpg

									  private String srcpath;

									  // ===剪切图片存放路径名称。如：c:\2.jpg

									  private String subpath;

									  public void setSrcpath(String srcpath) {

									    this.srcpath = srcpath;

									  }

									  public void setSubpath(String subpath) {

									    this.subpath = subpath;

									  }

									  // ===剪切点x坐标

									  private int x;

									  private int y;

									  // ===剪切点宽度

									  private int width;

									  private int height;

									  public cutImgUtils() {

									  }

									  public cutImgUtils(int x, int y, int width, int height) {

									    if(x<0){

									      x=0;

									    }else{

									      this.x = x;

									    }

									    if(y<0){

									      y=0;

									    }else{

									      this.y = y;

									    }

									    this.width = width;

									    this.height = height;

									  }

									  /**

									   *

									   * 对图片裁剪，并把裁剪完蛋新图片保存 。

									   */

									  public File cut() throws IOException {

									    FileInputStream is = null;

									    ImageInputStream iis = null;

									    try {

									      // 读取图片文件

									      is = new FileInputStream(srcpath);

									      /**

									       *

									       * 返回包含所有当前已注册 ImageReader 的 Iterator，这些 ImageReader

									       *

									       * 声称能够解码指定格式。 参数：formatName - 包含非正式格式名称 .

									       *

									       * (例如 "jpeg" 或 "tiff")等 。

									       */

									      Iterator<ImageReader> it = ImageIO

									          .getImageReadersByFormatName("jpg");

									      ImageReader reader = it.next();

									      // 获取图片流

									      iis = ImageIO.createImageInputStream(is);

									      /**

									       *

									       * <p>

									       * iis:读取源。true:只向前搜索

									       * </p>

									       * .将它标记为 ‘只向前搜索'。

									       *

									       * 此设置意味着包含在输入源中的图像将只按顺序读取，可能允许 reader

									       *

									       * 避免缓存包含与以前已经读取的图像关联的数据的那些输入部分。

									       */

									      reader.setInput(iis, true);

									      /**

									       *

									       * <p>

									       * 描述如何对流进行解码的类

									       * <p>

									       * .用于指定如何在输入时从 Java Image I/O

									       *

									       * 框架的上下文中的流转换一幅图像或一组图像。用于特定图像格式的插件

									       *

									       * 将从其 ImageReader 实现的 getDefaultReadParam 方法中返回

									       *

									       * ImageReadParam 的实例。

									       */

									      ImageReadParam param = reader.getDefaultReadParam();

									      /**

									       *

									       * 图片裁剪区域。Rectangle 指定了坐标空间中的一个区域，通过 Rectangle 对象

									       *

									       * 的左上顶点的坐标(x，y)、宽度和高度可以定义这个区域。

									       */

									      Rectangle rect = new Rectangle(x, y, width, height);

									      // 提供一个 BufferedImage，将其用作解码像素数据的目标。

									      param.setSourceRegion(rect);

									      /**

									       *

									       * 使用所提供的 ImageReadParam 读取通过索引 imageIndex 指定的对象，并将

									       *

									       * 它作为一个完整的 BufferedImage 返回。

									       */

									      BufferedImage bi = reader.read(0, param);

									      // 保存新图片

									      ImageIO.write(bi, "jpg", new File(subpath));

									      File file = new File("subpath");

									      return file;

									    } finally {

									      if (is != null)

									        is.close();

									      if (iis != null)

									        iis.close();

									    }

									  }

									  public File cut(String suffix) throws IOException {

									    FileInputStream is = null;

									    ImageInputStream iis = null;

									    try {

									      // 读取图片文件

									      is = new FileInputStream(srcpath);

									//       is = inputStream;

									      /**

									       *

									       * 返回包含所有当前已注册 ImageReader 的 Iterator，这些 ImageReader

									       *

									       * 声称能够解码指定格式。 参数：formatName - 包含非正式格式名称 .

									       *

									       * (例如 "jpeg" 或 "tiff")等 。

									       * Iterator<ImageReader> it = ImageIO.getImageReadersByFormatName("jpg");

									       */

									    String suffixName=null;

									      if(suffix.equals("gif")){

									        suffixName="gif";

									      }else if(suffix.equals("png")){

									        suffixName="png";

									      } else{

									        suffixName="jpg";

									      }

									      Iterator<ImageReader> it = ImageIO

									          .getImageReadersByFormatName(suffixName);

									      ImageReader reader = it.next();

									      // 获取图片流

									      iis = ImageIO.createImageInputStream(is);

									      /**

									       *

									       * <p>

									       * iis:读取源。true:只向前搜索

									       * </p>

									       * .将它标记为 ‘只向前搜索'。

									       *

									       * 此设置意味着包含在输入源中的图像将只按顺序读取，可能允许 reader

									       *

									       * 避免缓存包含与以前已经读取的图像关联的数据的那些输入部分。

									       */

									      reader.setInput(iis, true);

									      /**

									       *

									       * <p>

									       * 描述如何对流进行解码的类

									       * <p>

									       * .用于指定如何在输入时从 Java Image I/O

									       *

									       * 框架的上下文中的流转换一幅图像或一组图像。用于特定图像格式的插件

									       *

									       * 将从其 ImageReader 实现的 getDefaultReadParam 方法中返回

									       *

									       * ImageReadParam 的实例。

									       */

									      ImageReadParam param = reader.getDefaultReadParam();

									      /**

									       *

									       * 图片裁剪区域。Rectangle 指定了坐标空间中的一个区域，通过 Rectangle 对象

									       *

									       * 的左上顶点的坐标(x，y)、宽度和高度可以定义这个区域。

									       */

									      Rectangle rect = new Rectangle(x, y, width, height);

									      // 提供一个 BufferedImage，将其用作解码像素数据的目标。

									      param.setSourceRegion(rect);

									      /**

									       *

									       * 使用所提供的 ImageReadParam 读取通过索引 imageIndex 指定的对象，并将

									       *

									       * 它作为一个完整的 BufferedImage 返回。

									       */

									      BufferedImage bi = reader.read(0, param);

									      // 保存新图片

									      ImageIO.write(bi, "jpg", new File(subpath));

									      File file = new File(subpath);

									      return file;

									    } finally {

									      if (is != null)

									        is.close();

									      if (iis != null)

									        iis.close();

									    }

									  }

									}

遇到的问题总结：

-裁剪图片发生偏移现象
解决办法：使用压缩后的图片等比例收集裁切坐标信息
-MultipartFile 和 File之间相互转化

第一种方法：

				?

									MultipartFile file = xxx; 

									   CommonsMultipartFile cf= (CommonsMultipartFile)file; 

									   DiskFileItem fi = (DiskFileItem)cf.getFileItem();

									   File f = fi.getStoreLocation();

会在项目的根目录的临时文件夹下生成一个文件；

第二种方法：

transferTo(File dest)；

会在项目中生成一个新文件；

第三种方法：　

File f = (File) xxx 强转即可。前提是要配置multipartResolver，要不然会报类型转换失败的异常。　　

				?

									<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

									   <property name="maxUploadSize" value="104857600"/>

									    <property name="maxInMemorySize" value="4096"/>

									  </bean>

没试过；

第四种方法：

Workbook wb = Workbook.getWorkbook(xxx .getInputStream());

转换为输入流，直接读取；

第五种方法：

byte[] buffer = myfile.getBytes();

先转换为字节数组，没试过；

第六种方法：

直接转成输入流

				?

									MultipartFile file=xxx;

									 is = file.getInputStream();

									 src = javax.imageio.ImageIO.read(is);

									 ret = src.getWidth(null); // 得到源图宽

参考资料：
jcop api：http://code.ciaoca.com/jquery/jcrop/.

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。

JavaWeb实现裁剪图片上传完整代码

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