springmvc 实现页面上传文件/图片

柔情只为你懂 2022-05-16 01:15 299阅读 0赞

# 目的：使用springmvc上传文件/图片 #

项目整体预览：

![70][]

###  第一步：导入相对应的jar包 （） ###

![70 1][]

###  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>
      
        
      <servlet>
      	<servlet-name>springmvc</servlet-name>
      	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      	
      	<init-param>
      		<param-name>contextConfigLocation</param-name>
      		<param-value>classpath:springmvc.xml</param-value>
      	</init-param>
      
      </servlet>
      <servlet-mapping>
      	<servlet-name>springmvc</servlet-name>
      	
      	
      	<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">
            
       	
        <context:component-scan base-package="com.ziyang.upload.controller" />
            
         <mvc:annotation-driven/>
         
         
         
         
         <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
         	
         	<property name="maxUploadSize" value="100000000000"></property>
         </bean>
         
         
         
         
         <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][http_localhost_8080_qiniu-upload-img_index.html]

选择文件后点击确定。

[70]: /images/20220516/089d9122dc054e9d8b2bc65e357cbc60.png
[70 1]: /images/20220516/7841303f78c64583a825b0967598532e.png
[http_localhost_8080_qiniu-upload-img_index.html]: http://localhost:8080/qiniu-upload-img/index.html