Spring MVC上传文件

Spring MVC上传文件

1.Web.xml中添加：

    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc-servlet.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
        <multipart-config>
            <max-file-size>5242880</max-file-size> <!--上传单个文件的最大限制5MB -->
            <max-request-size>20971520</max-request-size> <!--请求的最大限制20MB，上传多个文件总共大小 -->
            <file-size-threshold>0</file-size-threshold> <!--当文件的大小超过临界值时将写入磁盘 -->
        </multipart-config>
    </servlet>
    <!--拦截所有请求 -->
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

2.Spring MVC配置文件中添加：

    <!-- 视图解析器 -->
    <bean id="internalResourceViewResolver"
          class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
    </bean>

    <bean id="multipartResolver"
          class="org.springframework.web.multipart.support.StandardServletMultipartResolver">
    </bean>

3. 添加一个控制器

@Controller
@RequestMapping("/fileupload")
public class FileUploadController {

    @RequestMapping("page")
    public String file(Model model){
        return "fileupload";
    }

    @RequestMapping(value="/saveFile",method=RequestMethod.POST)
    public String saveFile(Model model,MultipartFile[] files,HttpServletRequest request) throws Exception{

        //文件存放的位置
        String path=request.getSession().getServletContext().getRealPath("/files");
        System.out.println(path);
        String ret="";
        for (MultipartFile file : files) {
            //保存文件
            File tempFile=new File(path, file.getOriginalFilename());
            file.transferTo(tempFile);
            ret+="<img src='../files/"+file.getOriginalFilename()+"' width='300' />";
        }
        model.addAttribute("images", ret); 
        return "fileupload"; 
} 
}

4.文件上传页面 fileupload.jsp

<%@ page language="java" contentType="text/html;charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>fileupload</title>
</head>
<body>
<h2>fileupload</h2>
<form action="saveFile" method="post"  enctype="multipart/form-data">
    <p>
        <label for="files">文件：</label>
        <input type="file" name="files" id="files" multiple="multiple" />
    </p>
    <p>
        <button>提交</button>
    </p>
    <p>${images}</p>
</form>
</body>
</html>

5.浏览器访问

 

 

end

 

posted @ 2016-12-26 00:14  dahuandahuan  阅读(208)  评论(0)  编辑  收藏  举报