Spring MVC实现文件上传功能

/SpringMVC_05/WebContent/upload.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>Insert title here</title>
<script type="text/javascript" src="../js/jquery-3.3.1.min.js"></script>
<script type="text/javascript">
	
</script>
</head>
<body>
	Spring MVC 案例
	<br>
	版权所有@嘉乐集团总公司.ltd,
	<br>
	<h1>SpringMVC实现文件上传</h1>	
	<form name="fileForm" action="/SpringMVC_05/file/upload" method="post" enctype="multipart/form-data">
		选择文件：<input type="file" name="file" />
		<input type="submit" value="上传" />
	</form>
</body>
</html>

/SpringMVC_05/src/com/jalor/web/controller/annotation/upload/UploadController.java

package com.jalor.web.controller.annotation.upload;

import java.io.File;
import java.io.IOException;
import java.util.Iterator;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;

@Controller
@RequestMapping("/file")
public class UploadController {

	/**
	 * @author len
	 * @param request
	 * @param response
	 * @return
	 * @deprecated 文件上传
	 * @throws IllegalStateException
	 * @throws IOException
	 */
	@RequestMapping("/upload")
	public String upload(HttpServletRequest request, HttpServletResponse response) throws IllegalStateException, IOException{
		// 实例化一个解析器，对Spring上下文进行解析
		CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());
		// 解析Request，拿到数据判断是否是isMultipart类型的数据
		if (multipartResolver.isMultipart(request)) {
			// 转换成SpringMVC封装好的类型
			MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request;
			// 通过迭代器进行迭代
			Iterator<String> iter = multiRequest.getFileNames();
			while (iter.hasNext()) {
				// 获取文件
				MultipartFile file = multiRequest.getFile(iter.next());
				if (file != null) {
					// 获取文件名称
					String fileName = file.getOriginalFilename();
					// 获取tomcat下项目的发布路径
					String tomcat = request.getSession().getServletContext().getRealPath("/upload");
					String path = tomcat +"/"+ fileName;
					// 按照指定的路径进行写入文件
					System.out.println("文件上传位置："+ path);
					File localFile = new File(path);
					file.transferTo(localFile);
				}
			}
		}
		return "/success";
	}

	/**
	 * @author len
	 * @deprecated 首先进入文件上传页面
	 * @return
	 */
	@RequestMapping("/toUpload")
	public String toUpload(){
		return "/upload";
	}
	
}

/SpringMVC_05/src/config/springAnnotation-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"  
 xmlns:context="http://www.springframework.org/schema/context"  
 xmlns:p="http://www.springframework.org/schema/p"  
 xmlns:mvc="http://www.springframework.org/schema/mvc"  
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
 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.xsd  
      http://www.springframework.org/schema/mvc  
      http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

	<!-- 注解扫描包 -->
	<context:component-scan base-package="com.jalor.web.controller.annotation"></context:component-scan>
	
	<!-- 开启注解(方法映射、类映射) -->
	<!-- <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />
	<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" /> -->
	<!-- 注解驱动（优化版） -->
	<mvc:annotation-driven/>
	
	<!-- 静态资源访问 -->
	<mvc:resources location="/images/" mapping="/images/**"/>
	<mvc:resources location="/js/" mapping="/js/**"/>
	
	<!-- 视图解析器 -->
	<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/"></property>
		<property name="suffix" value=".jsp"></property>
	</bean>
	
	<!-- 文件上传解析器 -->
	<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
		<!-- 指定字符编码 -->
		<property name="defaultEncoding" value="utf-8" />
		<!-- 最大值（需上传的文件是容量总和） -->
		<property name="maxUploadSize" value="10485760000" />
		<!-- 最小缓存 -->
		<property name="maxInMemorySize" value="40960" />
	</bean>
	
 </beans>

Spring MVC实现文件上传功能

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