springmvc文件上传2中方法
基于前面文章的基础上。
一、准备
需要的jar
二、配置
1、 spmvc-servlet.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:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:util="http://www.springframework.org/schema/util"
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/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-3.0.xsd">
<!-- 默认的注解映射的支持 ,它会自动注册DefaultAnnotationHandlerMapping 与AnnotationMethodHandlerAdapter-->
<mvc:annotation-driven />
<!-- 自动扫描注解的Controller -->
<context:component-scan base-package="com.wy.controller" />
<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter" />
<!-- 映射处理器 -->
<bean id="simpleUrlMapping"
class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="/fileUploadController.do">fileUploadController</prop>
</props>
</property>
</bean>
<!-- ParameterMethodNameResolver 解析请求参数，并将它匹配Controller中的方法名 -->
<bean id="parameterMethodNameResolver"
class="org.springframework.web.servlet.mvc.multiaction.ParameterMethodNameResolver">
<property name="paramName" value="action" />
</bean>
<bean id="fileUploadController"
class="com.wy.controller.FileUploadController">
<property name="methodNameResolver"
ref="parameterMethodNameResolver">
</property>
</bean>
<!-- 文件上传表单的视图解析器 -->
<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="204800" />
</bean>
</beans>
2、Controller
使用两种方式：
一种是基于注解的，另一种传统的方式HttpServletRequest
使用第二种方式时要注意：操作方法中对应的方法参数前两位必须是request,response对象并且都要加上，否则会出现 No request handling method with name 'insert' in class "ClassName"，页面显示为404错误
这个问题出现在使用多操作控制器情况下，相关的操作方法中对应的方法参数前两位必须是request,response对象，必须要有，否则会报如上异常。
package com.wy.controller;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.springframework.stereotype.Controller;
import org.springframework.util.MultiValueMap;
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;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.multiaction.MultiActionController;
@Controller
@RequestMapping("/fileUploadController")
public class FileUploadController extends MultiActionController {
/**
* 1、文件上传
* @param request
* @param response
* @return
*/
public ModelAndView uploadFiles(HttpServletRequest request, HttpServletResponse response) {
ModelAndView mav = new ModelAndView();
// 转型为MultipartHttpRequest
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
// 获得上传的文件（根据前台的name名称得到上传的文件）
MultiValueMap<String, MultipartFile> multiValueMap = multipartRequest.getMultiFileMap();
List<MultipartFile> file = multiValueMap.get("clientFile");
//MultipartFile file = multipartRequest.getFile("clientFile");
if(!file.isEmpty()){
//在这里就可以对file进行处理了，可以根据自己的需求把它存到数据库或者服务器的某个文件夹
System.out.println("================="+file.get(0).getName() + file.get(0).getSize());
}
return mav;
}
/**
*
* @param name
* @param file
* @param session
* @return
*/
@RequestMapping(value="/uploadFile", method=RequestMethod.POST)
public String uploadFile(@RequestParam("fileName") String fileName,
@RequestParam("clientFile") MultipartFile clientFile, HttpSession session){
if (!clientFile.isEmpty()) {
//在这里就可以对file进行处理了，可以根据自己的需求把它存到数据库或者服务器的某个文件夹
System.out.println("================="+clientFile.getSize());
}
return "";
}
}
对文件的具体实现
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.UUID;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
public class AddImage {
public String upload2(HttpServletRequest request,HttpServletResponse response, String fileName) throws IllegalStateException, IOException {
//创建一个通用的多部分解析器
CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());
//判断 request 是否有文件上传,即多部分请求
if(multipartResolver.isMultipart(request)){
//转换成多部分request
MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest)request;
//取得request中的所有文件名
Iterator<String> iter = multiRequest.getFileNames();
while(iter.hasNext()){
//记录上传过程起始时的时间，用来计算上传时间
int pre = (int) System.currentTimeMillis();
//取得上传文件
MultipartFile file = multiRequest.getFile(iter.next());
if(file != null){
//取得当前上传文件的文件名称
String myFileName = file.getOriginalFilename();
//如果名称不为“”,说明该文件存在，否则说明该文件不存在
if(myFileName.trim() !=""){
System.out.println(myFileName);
//重命名上传后的文件名
fileName = UUID.randomUUID() +"+"+ file.getOriginalFilename();
//定义上传路径
String path = "F:/workspace/myproject/WebRoot/image/" + fileName;
File localFile = new File(path);
file.transferTo(localFile);
}
}
//记录上传该文件后的时间
int finaltime = (int) System.currentTimeMillis();
System.out.println(finaltime - pre);
}
}
return fileName ;
}
}
3、试图
upload.jsp
<%@ 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>file upload test</title> </head> <body> <form method="post" action="<%=path %>/fileUploadController/uploadFile" enctype="multipart/form-data"> 文件名: <input type="text" name="fileName" /><br/> <input type="file" name="clientFile" /><br/> <input type="submit" value="上传文件 "/> </form> </body> </html>
