springMVC_03文件上传 及 临时目录相关

springMVC文件上传

 

增加上传组件依赖：

In the case of the CommonsMultipartResolver, you need to use commons-fileupload.jar.

apache-commons-io.jar

apache-commons-fileupload.jar

 

 <dependency>
     <groupId>commons-iogroupId>
     <artifactId>commons-ioartifactId>
     <version>2.4version>
 dependency>
 <dependency>
     <groupId>commons-fileuploadgroupId>
     <artifactId>commons-fileuploadartifactId>
     <version>1.3version>
 dependency>

 

 

 

 

配置文件上传相关配置，springMVC.xml配置如下：

 

 

 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"
     xmlns:mvc="http://www.springframework.org/schema/mvc"
     xsi:schemaLocation="        http://www.springframework.org/schema/beans
         http://www.springframework.org/schema/beans/spring-beans.xsd
         http://www.springframework.org/schema/context
         http://www.springframework.org/schema/context/spring-context.xsd
         http://www.springframework.org/schema/mvc
         http://www.springframework.org/schema/mvc/spring-mvc.xsd">



     <mvc:annotation-driven/>


     <context:component-scan base-package="com.gc.springmvc.controller"/>


     <mvc:resources location="/resources/" mapping="/resources/**"/>


     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
     <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
         <property name="prefix" value="/WEB-INF/jsp/"/>
         <property name="suffix" value=".jsp"/>
     bean>


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

         <property name="defaultEncoding" value="UTF-8"/>

         <property name="maxInMemorySize" value="10240"/>

         <property name="maxUploadSize" value="100000"/>

         <property name="uploadTempDir" value="/tempdir"/>
     bean>

 beans>

 

 

上传页面

 <form action="fileupload" method="post" enctype="multipart/form-data">
     文件名称:
     <input type="text" name="name"/> <br/>
     选择文件：
     <input type="file" name="file"/> <br/>
     <input type="submit"/>
 form>

 

上传控制器

 package com.gc.springmvc.controller;

 import java.io.File;
 import java.util.Date;

 import javax.servlet.ServletContext;

 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.context.ServletContextAware;
 import org.springframework.web.multipart.commons.CommonsMultipartFile;
 import org.springframework.web.servlet.view.InternalResourceViewResolver;

 @Controller
 public class FileUploadController implements ServletContextAware{

     private ServletContext servletContext;

     public void setServletContext(ServletContext servletContext) {
         this.servletContext = servletContext;
     }

     /**
      * 文件上传
      * @param assignedName 为文件指定新的名称
      * @param file  上传的文件
      * @return
      */
     @RequestMapping(value={"fileupload"}, method=RequestMethod.POST)
     public String fileupload(@RequestParam("name")String assignedName,@RequestParam("file")CommonsMultipartFile file) {
         String viewName = "uploadSuccess";
         if(!file.isEmpty()) {
             //通过servletContext获取到文件的绝对路径
             String realPath = servletContext.getRealPath("/upload");
             System.out.println("文件被保存到："+realPath);

             System.out.println("指定的名称："+assignedName);

             String originalFileName = file.getOriginalFilename();
             System.out.println("原始名称："+originalFileName);

             String fileType = originalFileName.substring(originalFileName.lastIndexOf("."));
             System.out.println("文件类型："+fileType);

             File targetFile = new File(realPath, assignedName+"-"+new Date().getTime()+fileType);
             try {
                 file.getFileItem().write(targetFile);
             } catch (Exception e) {
                 e.printStackTrace();
                 viewName = "uploadFailure";
             };
         }
         //重定向
         return InternalResourceViewResolver.REDIRECT_URL_PREFIX+viewName;
     }

     /**
      * 返回成功视图
      */
     @RequestMapping(value="uploadSuccess")
     public String uploadSuccess() {
         return "uploadSuccess";
     }

     /**
      * 返回失败视图
      */
     @RequestMapping("uploadFailure")
     public String uploadFailure() {
         return "uploadFailure";
     }

 }