jedis获取redis图片 转成Base64
jedis存对象
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/** * 序列化 * * @param object * @return */public static byte[] serialize(Object object) { ObjectOutputStream oos = null; ByteArrayOutputStream baos = null; try { baos = new ByteArrayOutputStream(); oos = new ObjectOutputStream(baos); oos.writeObject(object); byte[] bytes = baos.toByteArray(); return bytes; } catch (Exception e) { } return null; } /** * 反序列化 * * @param bytes * @return */public static Object unserialize(byte[] bytes) { ByteArrayInputStream bais = null; try { ObjectInputStream inputStream; inputStream = new ObjectInputStream(new ByteArrayInputStream(bytes)); Object obj = inputStream.readObject(); } catch (Exception e) { } return null;} |
jedis获取redis里面的图片 转成Base64
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/** * 将字节转为对象 */ public Object byte2Object(byte[] bytes) { if (bytes == null || bytes.length == 0) return null; try { ObjectInputStream inputStream; inputStream = new ObjectInputStream(new ByteArrayInputStream(bytes)); Object obj = inputStream.readObject(); return obj; } catch (IOException e) { e.printStackTrace(); } catch (ClassNotFoundException e) { e.printStackTrace(); } return null; } |
获取Base64字符
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String imgBase64Str = Base64Utill.getImgBase64Str( (byte[])(byte2Object(jedis.get(key.getBytes()))) ); |
转Base64工具类
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import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import javax.imageio.stream.FileImageInputStream;import sun.misc.BASE64Decoder;import sun.misc.BASE64Encoder;public class Base64Utill { /** * * @Description 将字节转Base64文件 * @param data 要转换的字节 * @param fileType 文件类型 * @return Base64字符串 */ public static String getImgBase64Str(byte[] data, String fileType) throws IOException { String fileContentBase64 = null; String base64Str = "data:" + fileType + ";base64,"; String content = null; //对字节数组Base64编码 if (data == null || data.length == 0) { return null; } BASE64Encoder encoder = new BASE64Encoder(); content = encoder.encode(data); if (content == null || "".equals(content)) { return null; } fileContentBase64 = base64Str + content; return fileContentBase64; } /** * * @Description 将字节转Base64 * @param data 要转换的字节 * @return Base64字符串 */ public static String getImgBase64Str(byte[] data) throws IOException { String fileContentBase64 = null; String content = null; //对字节数组Base64编码 if (data == null || data.length == 0) { return null; } BASE64Encoder encoder = new BASE64Encoder(); content = encoder.encode(data); if (content == null || "".equals(content)) { return null; } fileContentBase64=content; return fileContentBase64; } /** * * @Description 将字节转Base64文件 * @param file 要转换的文件 * @param fileType 文件类型 * @return Base64字符串 */ public static String getImgBase64Str(File file) { String fileContentBase64 = null; String content = null; //将图片文件转化为字节数组字符串，并对其进行Base64编码处理 InputStream in = null; //读取图片字节数组 try { in = new FileInputStream(file); byte[] data = new byte[in.available()]; in.read(data); in.close(); //对字节数组Base64编码 if (data == null || data.length == 0) { return null; } BASE64Encoder encoder = new BASE64Encoder(); content = encoder.encode(data); if (content == null || "".equals(content)) { return null; } return encoder.encode(data); } catch (IOException e) { e.printStackTrace(); } finally { if (in != null) { try { in.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } return fileContentBase64; } /** * * @Description 将字节转Base64文件 * @param file 要转换的文件 * @param fileType 文件类型 * @return Base64字符串 */ public static String getImgBase64Str(File file, String fileType) throws IOException { String fileContentBase64 = null; String base64Str = "data:" + fileType + ";base64,"; String content = null; //将图片文件转化为字节数组字符串，并对其进行Base64编码处理 InputStream in = null; //读取图片字节数组 try { in = new FileInputStream(file); byte[] data = new byte[in.available()]; in.read(data); in.close(); //对字节数组Base64编码 if (data == null || data.length == 0) { return null; } BASE64Encoder encoder = new BASE64Encoder(); content = encoder.encode(data); if (content == null || "".equals(content)) { return null; } fileContentBase64 = base64Str + content; } catch (IOException e) { e.printStackTrace(); } finally { if (in != null) { in.close(); } } return fileContentBase64; } /** * * @Description base64转字节 * @param base64Str 字符串 * @return byte[] */ public static byte[] base64String2Byte(String base64Str){ BASE64Decoder decoder = new BASE64Decoder(); byte[] b = null; try { b = decoder.decodeBuffer(base64Str); for (int i = 0; i < b.length; ++i) { if (b[i] < 0) { b[i] += 256; } } } catch (IOException e) { e.printStackTrace(); } return b; } /** * 将图片转换成Base64编码 * @param imgFile 待处理图片 * @return */ public static String getImgBase64Str(String imgFile) { // 将图片文件转化为字节数组字符串，并对其进行Base64编码处理 InputStream in = null; byte[] data = null; // 读取图片字节数组 try { in = new FileInputStream(imgFile); data = new byte[in.available()]; in.read(data); in.close(); } catch (IOException e) { e.printStackTrace(); } BASE64Encoder encoder = new BASE64Encoder(); return encoder.encode(data); } /** * 将图片转换成字节数组 * @param imgFile 待处理图片 * @return */ public byte[] image2byte(String path){ byte[] data = null; FileImageInputStream input = null; try { input = new FileImageInputStream(new File(path)); ByteArrayOutputStream output = new ByteArrayOutputStream(); byte[] buf = new byte[1024]; int numBytesRead = 0; while ((numBytesRead = input.read(buf)) != -1) { output.write(buf, 0, numBytesRead); } data = output.toByteArray(); output.close(); input.close(); } catch (FileNotFoundException ex1) { ex1.printStackTrace(); } catch (IOException ex1) { ex1.printStackTrace(); } return data; } /** * 对字节数组字符串进行Base64解码并生成图片 * @param imgStr 图片数据 * @param imgFilePath 保存图片全路径地址 * @return */ public static boolean generateImage(String imgStr, String imgFilePath) { // if (imgStr == null) // 图像数据为空 return false; BASE64Decoder decoder = new BASE64Decoder(); try { // Base64解码 byte[] b = decoder.decodeBuffer(imgStr); for (int i = 0; i < b.length; ++i) { if (b[i] < 0) {// 调整异常数据 b[i] += 256; } } // 生成jpg图片 OutputStream out = new FileOutputStream(imgFilePath); out.write(b); out.flush(); out.close(); return true; } catch (Exception e) { return false; } } } |
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b[i] += 256;}}// 生成jpg图片OutputStream out = new FileOutputStream(imgFilePath);out.write(b);out.flush();out.close();return true;} catch (Exception e) {return false;}}} |
以上为个人经验，希望能给大家一个参考，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/qq_33758782/article/details/117454310
