目的:使用springmvc上传文件/图片

项目整体预览:

 第一步:导入相对应的jar包 ()

 第二步:web.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>qiniu-upload-img</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
    <!-- 前端控制器  -->
  <servlet>
  	<servlet-name>springmvc</servlet-name>
  	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  	<!-- 默认找的是 /WEB-INF/[servlet的名称]-servlet.xml -->
  	<init-param>
  		<param-name>contextConfigLocation</param-name>
  		<param-value>classpath:springmvc.xml</param-value>
  	</init-param>
  
  </servlet>
  <servlet-mapping>
  	<servlet-name>springmvc</servlet-name>
  	<!-- 
  		1、 /* 拦截所有(jsp js png .css)  真的全拦截	  建议不使用
  		2、 *.action *.do  拦截以do action 结尾的请求
  		3、 /  拦截所有(不包括jsp)			强烈建议使用    对静态资源放行
  	 -->
  	
  	<url-pattern>*.action</url-pattern>
  </servlet-mapping>
  
  
  
  
</web-app>

 第三步:springmvc.xml配置

 

<?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-4.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">
        
   	<!-- 扫描@controler @Service 等注解 -->
    <context:component-scan base-package="com.ziyang.upload.controller" />
        
     <mvc:annotation-driven/>
     
     
     <!-- 上传图片配置实现类 -->
     <!-- id和class 都是固定的 -->
     <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
     	<!-- 上传图片的大小 -->
     	<property name="maxUploadSize" value="100000000000"></property>
     </bean>
     
     
     <!-- 视图解释器 -->
     <!-- 用于配置访问地址的前后缀  -->
     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
     	<property name="prefix" value="/"/>
     	<property name="suffix" value=".html"/>
     </bean> 
</beans>

第四步:index.html

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>

	<form action="http://localhost:8080/qiniu-upload-img/bbb.action" method="post" enctype="multipart/form-data">
		<input type="file" name="img" value="请选择文件"/> <br />
		<input type="submit" />
			
	</form>
	
</body>
</html>

第五步:测试controller

package com.ziyang.upload.controller;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;

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

@Controller
public class UploadController {
	
	@RequestMapping(value = "/bbb.action")
	public String test1(MultipartFile img) throws IOException{
		
		//方法一 获取相对应的流
		InputStream stream = img.getInputStream();
		
		//直接存储到某个文件位置
		File file = new File("填写你的路径");
		img.transferTo(file);
		
		
		return "index";
	}
	
}

 第六步演示:

打开浏览器:http://localhost:8080/qiniu-upload-img/index.html

选择文件后点击确定。