在该示例中，阐述了SpringMVC如何上传文件。
1、上传页面upload.jsp
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<body> <form action="/TestSpringMVC3/data/uploadfile" enctype="multipart/form-data" method="post"> file:<input type="file" name="file"><br> <input type="submit" value="upload file"> </form> </body> |
2、controller配置文件
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<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> <!-- 使Spring支持自动检测组件，如注解的Controller --> <context:component-scan base-package="cn.com.yy.controller"/> <!-- 开启注解配置 --> <mvc:annotation-driven/> <!-- 支持JSP JSTL的解析器 --> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/page/"/> <property name="suffix" value=".jsp"/> </bean> <!-- 配置文件上传解析器 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="defaultEncoding" value="utf-8"/> <property name="maxUploadSize" value="10485760000"/> <property name="maxInMemorySize" value="40960"/> </bean> </beans> |
主要是添加了文件上传的解析器，配置了默认编码，最大的上传大小以及缓存大小等参数。
3、Controller
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package cn.com.yy.controller; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.multipart.commons.CommonsMultipartFile; @Controller@RequestMapping("/data") public class FileUploadController { /** * method1:通过参数CommonsMultipartFile进行解析 * @RequestParam("file")中的file对应于upload.jsp中的file类型的name对应的名称 * @param file * @return * @throws IOException */ @RequestMapping(value="/uploadfile") public String upload1(@RequestParam("file") CommonsMultipartFile file) throws IOException{ //获取文件名称 String fileName = file.getOriginalFilename(); //写入本地磁盘 InputStream is = file.getInputStream(); byte[] bs = new byte[1024]; int len; OutputStream os = new FileOutputStream(new File("D:/temp/" + fileName)); while ((len = is.read(bs)) != -1) { os.write(bs, 0, len); } os.close(); is.close(); return "upload_success"; } @RequestMapping("/upload") public String toPage(){ return "upload"; } } |
4、返回页面upload_success.jsp
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<body> upload file success!! </body> |
5、测试
访问 http://localhost:8080/TestSpringMVC3/data/upload 跳转到上传页面
选择文件上传
点击上传会跳转到上传成功页面。
上述方法只是简单的讲解了SpringMVC如何上传文件。
第二种方法：使用SpringMVC封装的方法进行文件上传
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/** * 使用SpringMVC封装好的方法进行文件上传 * @param request * @param response * @throws IllegalStateException * @throws IOException */ @RequestMapping("/uploadfile2") public void upload2(HttpServletRequest request,HttpServletResponse response) throws IllegalStateException, IOException{ //获取解析器 CommonsMultipartResolver resolver = new CommonsMultipartResolver(request.getSession().getServletContext()); //判断是否是文件 if(resolver.isMultipart(request)){ //进行转换 MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest)(request); //获取所有文件名称 Iterator<String> it = multiRequest.getFileNames(); while(it.hasNext()){ //根据文件名称取文件 MultipartFile file = multiRequest.getFile(it.next()); String fileName = file.getOriginalFilename(); String localPath = "D:/temp/" + fileName; File newFile = new File(localPath); //上传的文件写入到指定的文件中 file.transferTo(newFile); } } } |
该方法上传文件效率更优。
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。
原文链接：http://blog.csdn.net/yyywyr/article/details/44571353
