基于SpringMVC的文件上传和下载

来源：互联网发布：jquery接收json数据编辑：程序博客网时间：2024/04/26 17:28

一文件上传和下载需要的jar包

二文件的上传：

jsp页面:

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>  <title>陈二狗的妖孽人生</title>  <script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery-1.9.1.js"></script>  </head>  <body>    <h1>SpringMVCDemo:${message}</h1>    <!-- <script type="text/javascript">  $(document).ready(function() {alert("陈二狗的妖孽人生");});  </script> -->  <form action="${pageContext.request.contextPath}/HelloWorld/uploadFile" method="POST" enctype="multipart/form-data">  <h2>文件上传</h2>  文件:<input type="file" name="uploadFile"/><br><br>  <input type="submit" value="上传">  <a href="${pageContext.request.contextPath }/HelloWorld/fileDownLoad?123.jpg">下载</a>  </form>  </body></html>

Controller里面的文件上传的方法:

/** * 文件上传 * @param uploadFile * @param session * @return * @throws IOException  * @throws IllegalStateException  */@RequestMapping(value = "/uploadFile", method = RequestMethod.POST)public String uploadFile(MultipartFile uploadFile, HttpSession session) throws Exception{//  获取文件名称作为保存在服务器的文件的名称String filename = uploadFile.getOriginalFilename();//  前半部分路径， 目录，将WebRoot下一个名称为images文件夹 转换成绝对路径String leftPath = session.getServletContext().getRealPath("/images");//  进行路径拼接 = 前半部分路径 + 文件名称File file = new File(leftPath, filename);//  如果上传文件目录不存在  自动创建该文件夹if (!file.exists()){file.mkdirs();}uploadFile.transferTo(file);return "loadFileSuccess";}

spingMVC配置文件配置如下：

<!-- 配置文件上传 -->   <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">   <property name="maxUploadSize" value="50000000"></property>   <!-- <property name="maxUploadSizePerFile" value="5000000"></property> -->   <property name="defaultEncoding" value="utf-8"></property>   </bean>

三文件的下载

Controller里面的方法：

/** * 文件下载 * @return * @throws Exception */@RequestMapping(value = "/fileDownLoad", method = RequestMethod.GET)public ResponseEntity<byte[]> fileDownLoad()throws Exception{File file = new File("E:\\相册\\微博\\123.jpg");HttpHeaders headers = new HttpHeaders();String fileName = new String("123.jpg".getBytes("utf-8"), "iso-8859-1");  //  解决中文乱码问题headers.setContentDispositionFormData("attachment", fileName);headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);return  new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file), headers, HttpStatus.CREATED);}

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