1、话不多说，先贴代码
package com.qf.file.controll;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.io.FileUtils;
import org.apache.tools.ant.taskdefs.email.Header;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.context.ContextLoaderListener;
import org.springframework.web.multipart.MultipartFile;
@Controller
public class FileControll {
@RequestMapping("/fileup")
public String fileUp(@RequestParam(name="file",required=true)MultipartFile file,HttpServletRequest request) throws IllegalStateException, IOException{
//获取文件的名字
String fileName=file.getOriginalFilename();
//接下来:构建上传数据的路径
String path=request.getRealPath("/img"+File.separator+fileName);
//接下来保存数据
file.transferTo(new File(path));
return "/index.jsp";
}
@RequestMapping("/filedown")
public ResponseEntity<byte[]> fileDown(HttpServletRequest request) throws Exception{
//获取下载的文件路径
String path=request.getRealPath("/img/aaa.jpg");
//设置请求的头
HttpHeaders headers=new HttpHeaders();
headers.add("content-disposition","attachment;filename=aaa.jpg");
//设置返回数据的状态
HttpStatus status=HttpStatus.OK;
return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(new File(path)), headers, status);
}
}
2、前端代码
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
</head>
<body>
<form action="${pageContext.request.contextPath}/fileup.action" method="post" enctype="multipart/form-data">
<input type="file" name="file" id="file" value="" /><br />
<input type="submit" value="上传"/>
</form>
</body>
</html>
3、导包
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.2</version>
</dependency>
4、SpringMVC配置
<!--让当前的SpringMVC支持文件的上传-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!--控制上传文件的大小-->
<property name="maxUploadSize" value="23376434"></property>
<!--上传文件的数据编码-->
<property name="defaultEncoding" value="UTF-8"></property>
</bean>