在SpringMVC框架下实现文件的上传和下载示例

在SpringMVC框架下实现文件的上传和下载示例

在eclipse中的javaEE环境下：导入必要的架包

web.xml的配置文件：

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">

springDispatcherServlet

org.springframework.web.servlet.DispatcherServlet

contextConfigLocation

classpath:springmvc.xml

1

springDispatcherServlet

/

HiddenHttpMethodFilter

org.springframework.web.filter.HiddenHttpMethodFilter

HiddenHttpMethodFilter

/*

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">

springDispatcherServlet

org.springframework.web.servlet.DispatcherServlet

contextConfigLocation

classpath:springmvc.xml

1

springDispatcherServlet

/

HiddenHttpMethodFilter

org.springframework.web.filter.HiddenHttpMethodFilter

HiddenHttpMethodFilter

/*

spring的bean的配置文件springmvc.xml;

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xmlns:context="http://springframework.org/schema/context"

xmlns:mvc="http://springframework.org/schema/mvc"

xsi:schemaLocation="http://springframework.org/schema/mvc http://springframework.org/schema/mvc/spring-mvc-4.0.xsd

http://springframework.org/schema/beans http://springframework.org/schema/beans/spring-beans.xsd

http://springframework.org/schema/context http://springframework.org/schema/context/spring-context-4.0.xsd">

　　　　class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xmlns:context="http://springframework.org/schema/context"

xmlns:mvc="http://springframework.org/schema/mvc"

xsi:schemaLocation="http://springframework.org/schema/mvc http://springframework.org/schema/mvc/spring-mvc-4.0.xsd

http://springframework.org/schema/beans http://springframework.org/schema/beans/spring-beans.xsd

http://springframework.org/schema/context http://springframework.org/schema/context/spring-context-4.0.xsd">

　　　　class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

　　　　class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

handler类方法：实现文件的上传和下载的方法

@Controller

public class SpringMVCTest {

@Autowired

private EmployeeDao employeeDao;

//实现文件的下载

//需要说明的是文件的上传和下载不需要其他配置

@RequestMapping("testResponseEntity")

public ResponseEntity testResponseEntity(HttpSession session) throws IOException{

byte[] body=null;

ServletContext servletContext=session.getServletContext();

///files/abc.txt：所要下载文件的地址

InputStream in=servletContext.getResourceAsStream("/files/abc.txt");

body=new byte[in.available()];

in.read(body);

HttpHeaders headers=new HttpHeaders();

//响应头的名字和响应头的值

headers.add("Content-Disposition", "attachment;filename=abc.txt");

HttpStatus statusCode=HttpStatus.OK;

ResponseEntity response=new ResponseEntity(body, headers, statusCode);

return response;

}

　　//文件上传，

　　　　@RequestMapping("/testFileUpload")

　　　　public String testFileUpload(@RequestParam("desc") String desc,

　　　　　　@RequestParam("file") MultipartFile file) throws IOException{

　　　　　　System.out.println("desc:"+desc);

　　　　　　System.out.println("OriginalFilename"+file.getOriginalFilename());

　　　　　　System.out.println("InputStream"+file.getInputStream());

　　　　　　return "success";

　　}

}

jsp页面：index.jsp：

<%@ page language="java" contentType="text/html; charset=UTF-8"

pageEncoding="UTF-8"%>

　　　　File:

　　　　Desc:

Test ResponseEntity

success.jsp页面：显示文件上传成功

<%@ page language="java" contentType="text/html; charset=UTF-8"

pageEncoding="UTF-8"%>

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