SpringMVC上传文件FileUpload

2019-11-14 09:27:31

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我是在已经搭建好的sPRingMVC环境下，maven工程中的pom.xml所需要的jar包（其中spring上传文件的两个主要jar：commons-fileupload.jar和commons-io.jar）：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.zhihua</groupId> <artifactId>SpringMVC_FileUpload</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>SpringMVC_FileUpload Maven Webapp</name> <url>http://maven.apache.org</url> <properties>  <spring.version>3.2.8.RELEASE</spring.version>  <junit.version>4.10</junit.version> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency>  <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.1</version> </dependency>  <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency>  <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> <scope>test</scope> </dependency>  <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency>  <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.0.1</version> <scope>provided</scope> </dependency>  <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.1</version> <scope>provided</scope> </dependency> </dependencies> <build> <finalName>SpringMVC_FileUpload</finalName> </build></project>

在spring-mvc.xml中添加代码：

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="defaultEncoding" value="utf-8"></property> <property name="maxUploadSize" value="10485760000"></property> <property name="maxInMemorySize" value="40960"></property> </bean>

前端页面（fileUpload.jsp）和上传成功返回页面（success.jsp）:

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>springmvc-文件上传</title></head><body> <h1>采用流的方式上传文件</h1> <form name="form1" action="<c:url value='/fileUpload/upload_01'/>" method="post" enctype="multipart/form-data"> <input type="file" name="file_01"/> <input type="submit" value="fileupload"/> </form> <br> <h1>采用multipart提供的file.transfer方法上传文件1</h1> <form name="form2" action="<c:url value='/fileUpload/upload_02'/>" method="post" enctype="multipart/form-data"> <input type="file" name="file_02"/> <input type="submit" value="fileupload"/> </form> <br> <h1>采用multipart提供的file.transfer方法上传文件2</h1> <form name="form2" action="<c:url value='/fileUpload/upload_03'/>" method="post" enctype="multipart/form-data"> <input type="file" name="file_03"/> <input type="submit" value="fileupload"/> </form> <br> <h1>使用spring MVC提供的方法上传文件</h1> <form name="form2" action="<c:url value='/fileUpload/upload_spring'/>" method="post" enctype="multipart/form-data"> <input type="file" name="file_03"/> <input type="submit" value="fileupload"/> </form></body></html><%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body> <h2>文件上传成功！</h2></body></html>

controller 的代码：

package com.zhihua.controller;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.Date;import java.util.Iterator;import javax.servlet.http.HttpServletRequest;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.multipart.MultipartFile;import org.springframework.web.multipart.MultipartHttpServletRequest;import org.springframework.web.multipart.commons.CommonsMultipartFile;import org.springframework.web.multipart.commons.CommonsMultipartResolver;@Controller@RequestMapping("/fileUpload")public class FileUploadController { /** * 通过流的方式上传文件 * @RequestParam("file") 将name=file控件得到的文件封装成CommonsMultipartFile 对象 * <请替换成功能描述> <br> * <请替换成详细描述> * @param file * @return * @author caizh * @since [1.0.0] * @version [1.0.0,2017年2月5日] */ @RequestMapping("/upload_01") public String fileUpload_1(@RequestParam("file_01")CommonsMultipartFile file)throws IOException { //用来检测程序运行时间 long startTime = System.currentTimeMillis(); System.out.println("fileName:"+file.getOriginalFilename()); try{ //获取输出流 OutputStream os = new FileOutputStream("E:/"+new Date().getTime()+file.getOriginalFilename()); //获取输入流CommonsMultipartFile中可以直接得到文件的流 InputStream is = file.getInputStream(); int temp; //一个一个字节的读取并写入 while((temp=is.read())!=(-1)){ os.write(temp); } os.flush(); os.close(); is.close(); }catch(Exception e){ e.printStackTrace(); } long endTime = System.currentTimeMillis(); System.out.println("方法一的运行时间："+String.valueOf(endTime-startTime)+"ms"); return "view/success"; } /** * 采用file.Transto 来保存上传的文件 * <请替换成功能描述> <br> * <请替换成详细描述> * @param file * @return * @throws IOException * @author caizh * @since [1.0.0] * @version [1.0.0,2017年2月5日] */ @RequestMapping("/upload_02") public String fileUpload_2(@RequestParam("file_02") CommonsMultipartFile file)throws IOException { long startTime = System.currentTimeMillis(); System.out.println("fileName:"+file.getOriginalFilename()); String path = "E:/"+new Date().getTime()+file.getOriginalFilename(); File newFile = new File(path); //通过CommonsMultipartFile 的方法直接写文件 file.transferTo(newFile); long endTime = System.currentTimeMillis(); System.out.println("方法二的运行时间："+String.valueOf(endTime-startTime)+"ms"); return "view/success"; } /** * 使用MultipartFile上传文件 * <请替换成功能描述> <br> * <请替换成详细描述> * @param file * @return * @author caizh * @since [1.0.0] * @version [1.0.0,2017年2月5日] */ @RequestMapping("/upload_03") public String fileUpload_3(@RequestParam(value="file_03",required=false)MultipartFile file, HttpServletRequest request){ String path = request.getsession().getServletContext().getRealPath("upload"); System.out.println(path); String fileName = file.getOriginalFilename(); File targetFile = new File(path,fileName); if(!targetFile.exists()){ targetFile.mkdirs(); } //保存 try { file.transferTo(targetFile); }catch(Exception e){ e.printStackTrace(); } return "view/success"; } /** * 采用spring提供的上传文件的方法 * <请替换成功能描述> <br> * <请替换成详细描述> * @param request * @return * @throws IllegalStateException * @throws IOException * @author caizh * @since [1.0.0] * @version [1.0.0,2017年2月5日] */ @RequestMapping("/upload_spring") public String springUpload(HttpServletRequest request)throws IllegalStateException, IOException{ long startTime = System.currentTimeMillis(); //将当前上下文初始化给 CommonsMutipartResolver (多部分解析器) CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext()); //检查form中是否有enctype="multipart/form-data" if(multipartResolver.isMultipart(request)) { //将request变成多request MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest)request; //获取multiRequest中所有的文件名 Iterator iter = multiRequest.getFileNames(); while(iter.hasNext()){ //一次遍历所有的文件 MultipartFile file = multiRequest.getFile(iter.next().toString()); if(file!=null){ String path = "E:/springUpload"+file.getOriginalFilename(); //上传 file.transferTo(new File(path)); } } } long endTime = System.currentTimeMillis(); System.out.println("方法三的运行时间："+String.valueOf(endTime-startTime)+"ms"); return "view/success"; }}

好了，全部代码都给出了，“蛋蛋”是测试成功了，感兴趣的朋友可以去比较不同上传方式的效率！

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