Spring3 MVC 文件上传

spring支持在网络应用程序处理文件上传，提供拔插的org.springframework.web.multipart.MultipartResolver对象　。

在写上传文件的前提下需提供两个jar包：

1.添加上传拦截，可指定上传的大小

 

 <!-- 上传拦截，如最大上传值及最小上传值 -->
     <bean id="multipartResolver"
         class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
         <!-- one of the properties available; the maximum file size in bytes -->
         <property name="maxUploadSize" value="100000" />
     </bean>

 2.添加java后台处理的API

 

 @RequestMapping(value = "/form", method = RequestMethod.POST)
 public String handleFormUpload(@RequestParam("name") String name,
 @RequestParam("file") MultipartFile file) {
 if (!file.isEmpty()) {
 byte[] bytes = file.getBytes();
 // 去理上传写文件代码

 }

 

具体文件

    spring_mvc.xml

 

 <?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:p="http://www.springframework.org/schema/p"
     xmlns:context="http://www.springframework.org/schema/context"
     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">
     <!-- 注解资源扫描包路径 -->
     <context:component-scan base-package="org.spring.mvc" />
     <bean
         class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />

     <bean
         class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />

     <!--  对模型视图名称的解析，即在模型视图名称添加前后缀,在requestmapping输入的地址后自动调用该类进行视图解析-->
     <bean id="viewResolver"
         class="org.springframework.web.servlet.view.InternalResourceViewResolver">
         <property name="viewClass"
             value="org.springframework.web.servlet.view.JstlView" />
         <property name="prefix" value="/" /><!-- 跳转页面的前缀路径 如 /web-inf/user/ -->
         <property name="suffix" value=".jsp"></property><!-- 跳转页面后缀 如 helloWorld.jsp-->
     </bean>

     <!-- 上传拦截，如最大上传值及最小上传值 -->
     <bean id="multipartResolver"
         class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
         <!-- one of the properties available; the maximum file size in bytes -->
         <property name="maxUploadSize" value="100000" />
     </bean>

 </beans>

 

FileUploadController.java文件

 

 package org.spring.mvc.upload;

 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.List;

 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.spring.mvc.HelloWorldController;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.multipart.MultipartFile;
 import org.springframework.web.multipart.MultipartHttpServletRequest;

 /**
  * 上传文件
  * @author chenyw
  *
  */
 @Controller
 @RequestMapping(value = "/toFileUpload")
 public class FileUploadController {
     private Logger logger = LoggerFactory.getLogger(HelloWorldController.class);

     /**
      * 单文件上传
      * @param name @RequestParam 取得name字段的值
      * @param file 文件
      * @return
      * @throws IOException
      */
     @RequestMapping(value = "/oneFileUpload", method = RequestMethod.POST)
     public String handleFormUpload(@RequestParam("name")
     String name, @RequestParam("file")
     MultipartFile file) throws IOException {

         logger.info("name："+name);
         logger.info("上传文件："+file.getOriginalFilename());
         if (!file.isEmpty()) {
              this.copyFile(file.getInputStream(), file.getOriginalFilename());

         }
         return "fileUpload/success";
     }

       /**
        * 多文件上传
        * @param request
        * @param name
        * @return
        * @throws Exception
        */
       @RequestMapping(value = "/multipartFileUpload",method = RequestMethod.POST)
          public String upload2(
             MultipartHttpServletRequest request ,
             @RequestParam("name") String name    // 页面上的控件值
             ) throws Exception {
           List<MultipartFile> files = request.getFiles("file");
           for( int i=0; i<files.size() ;i++){
                if(! files.get(i).isEmpty()) {
                    logger.info("上传文件："+files.get(i).getOriginalFilename());
                   this.copyFile(files.get(i).getInputStream(), files.get(i).getOriginalFilename());
                }
           }
           logger.info("success");
           return "fileUpload/success";
          }

       /**
        * 写文件到本地
        * @param in
        * @param fileName
        * @throws IOException
        */
       private void copyFile(InputStream in,String fileName) throws IOException{
           FileOutputStream fs = new FileOutputStream("d:/upload/"
                     + fileName);
             byte[] buffer = new byte[1024 * 1024];
             int bytesum = 0;
             int byteread = 0;
             while ((byteread = in.read(buffer)) != -1) {
                 bytesum += byteread;
                 fs.write(buffer, 0, byteread);
                 fs.flush();
             }
             fs.close();
             in.close();
       }


 }

 

 

单文件上传页面oneFileUpload.jsp

 

 <%@ page language="java" import="java.util.*" pageEncoding="GBK"%>
 <%
 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>
     <base href="<%=basePath%>">

     <title>My JSP 'oneFileUpload.jsp' starting page</title>

     <meta http-equiv="pragma" content="no-cache">
     <meta http-equiv="cache-control" content="no-cache">
     <meta http-equiv="expires" content="0">
     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
     <meta http-equiv="description" content="This is my page">
     <!--
     <link rel="stylesheet" type="text/css" href="styles.css">
     -->

   </head>

   <body>
     This is my onefileUpload page. <br>
     <form method="POST" action="toFileUpload/oneFileUpload" enctype="multipart/form-data">
         <input type="text" name="name"/>
         <input type="file" name="file"/>
         <input type="submit"/>
     </form>
   </body>
 </html>

 

多文件上传页面multipartFileUpload.jsp

 

 

 <%@ page language="java" import="java.util.*" pageEncoding="GBK"%>
 <%
 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>
     <base href="<%=basePath%>">

     <title>My JSP 'multipartFileUpload.jsp' starting page</title>

     <meta http-equiv="pragma" content="no-cache">
     <meta http-equiv="cache-control" content="no-cache">
     <meta http-equiv="expires" content="0">
     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
     <meta http-equiv="description" content="This is my page">
     <!--
     <link rel="stylesheet" type="text/css" href="styles.css">
     -->

   </head>

   <body>
     This is multipartFileUpload page. <br>
     <form method="POST" action="toFileUpload/multipartFileUpload" enctype="multipart/form-data">
         <input type="text" name="name"/><br>
         <input type="file" name="file"/><br>
         <input type="file" name="file"/><br>
         <input type="submit"/><br>
     </form>
   </body>
 </html>