您的位置: 首页  >  文章  >  SpringMVC + 文件上传

SpringMVC + 文件上传

分类: 文章 • 2023-10-16 22:07:38

一、项目文件截图，共用到7个文件：

SpringMVC + 文件上传

 

二、代码如下：

1、com.ht.bean/User --底层类

package com.ht.bean;

/**
 * Created by Administrator on 2019/3/1.
 */
public class User {
    private  int id;
    private String uname;
    private String password;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getUname() {
        return uname;
    }

    public void setUname(String uname) {
        this.uname = uname;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

 

2、con.ht.controller/UserController---这是控制层，相当于action，写方法的 

package com.ht.controller;

import com.ht.bean.User;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

/**
 * Created by Administrator on 2019/2/28.
 */
@Controller
@RequestMapping("/user")
public class UserController {

//该方法的访问路径为http://localhost:8080/SpringMVC_T03/user/toupload


    @RequestMapping("/toupload")
    public String toupload(){
        return "upload"; //返回upload.jsp页面
    }


    /*
    * 注意MultipartFile的name要和页面上的file的name一致
    * */
    @RequestMapping("upload")
    public String upload(MultipartFile face, User user, HttpServletRequest request)throws IOException{
         //获取文件名字
        //face.getName(); //上传控件的name face

        //上传的文件名字
        String fileName=face.getOriginalFilename();
        //获取项目根目录
        String path=request.getSession().getServletContext().getRealPath("\\");

        String dirPath=path+"upload\\";
        System.out.println("文件夹名称 ："+dirPath);
        File dirFile =new File(dirPath);

        if (!dirFile.exists()){//如果这个文件夹不存在
            dirFile.mkdir(); //创建文件夹
        }
        System.out.println("保存名字"+dirPath+"\\"+fileName);

        //重命名文件（防止文件被覆盖）
        fileName=UUID.randomUUID().toString()+fileName.substring(fileName.indexOf("."));

        //最终保存的文件名称
        File saveFile=new File(dirPath+"\\"+fileName);
        face.transferTo(saveFile);

        return "hello";
    }

    public static void main(String[] args) {
        String fileName="12.jpg";
        fileName=UUID.randomUUID().toString()+fileName.substring(fileName.indexOf("."));
        System.out.println(fileName);
    }
}

 

3、config/spring-web.xml --这是配置文件

<beans xmlns="http://www.springframework.org/schema/beans"
                xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
                xmlns:context="http://www.springframework.org/schema/context"
                xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

<!--1、开启注解模式-->
<mvc:annotation-driven/>
<!--2、配置默认servlet处理器-->
<mvc:default-servlet-handler/>

<!--配置WEB-INF下面的资源可以访问-->
<!--   <mvc:resources mapping="/css/**" location="/WEB-INF/css/"></mvc:resources>-->
<!--<mvc:resources mapping="/js/**" location="/WEB-INF/js/"></mvc:resources>
-->
<!--3、视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
    <property name="prefix" value="/WEB-INF/jsp/"/>
    <property name="suffix" value=".jsp"/>
</bean>

<!--4、扫描所有的控制器类-->
<context:component-scan base-package="com.ht.controller"/>

     <!--注入commons-fileupload-->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <!--限制文件上传的大小-->
        <property name="maxUploadSize" value="1048576"></property>

    </bean>

</beans>

 

4、WEB-INF/jsp/hello.jsp--这是操作成功进入的hello界面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
BBBBB成功进入hello界面，你好
</body>
</html>

 

5、WEB-INF/jsp/upload.jsp --这是文件上传的jsp页面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
   <form action="${pageContext.request.contextPath}/user/upload" method="post" enctype="multipart/form-data">
        姓名：<input type="text" name="uname"/><br>
        头像：<input type="file" name="face"/><br>
        <input type="submit" value="提交"/>
   </form>
</body>
</html>

 

6、WEB_INF/web.xml --配置文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">
    
    <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:config/spring-web.xml</param-value>
        </init-param>
    </servlet>
    
    <servlet-mapping>
        <servlet-name>SpringMVC</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!--过滤器-->
    <filter>
        <filter-name>CharacterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>utf-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

</web-app>

 

7、index.jsp 

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
    <title>$Title$</title>
  </head>
  <body>

  <a href="user/toupload">文件上传</a>

  </body>
</html>

 

注：操作说明：

先进入index.jsp，然后点击 “文件上传” ，然后进入upload.jsp页面，选择自己要上传的文件，我这里设置的是只能上传小于1M的文件

相关推荐