spring mvc 文件下的上传

@RequestMapping("/down")
    public void down(HttpServletRequest request, HttpServletResponse response) throws Exception {
        
        String message = null;
        String fileName = request.getSession().getServletContext().getRealPath("/")+"/upload/"+request.getParameter("fileName");
        
        File file = new File(fileName);
        FileInputStream fis = new FileInputStream(file);
        response.reset();
        response.setContentType("bin");
        response.addHeader("Content-Disposition", "attachment; filename=\"" + request.getParameter("fileName") + "\"");
        // 循环取出流中的数据
        byte[] b = new byte[100];
            int len;
            while ((len = fis.read(b)) > 0){
                response.getOutputStream().write(b, 0, len);
            }
            fis.close();
    }

 

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:mvc="http://www.springframework.org/schema/mvc" 
 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"
 xsi:schemaLocation="http://www.springframework.org/schema/beans
   http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
   http://www.springframework.org/schema/context
   http://www.springframework.org/schema/context/spring-context-3.0.xsd
   http://www.springframework.org/schema/mvc 
   http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> 
  
 <context:component-scan base-package="net.spring.controller" /> 
 
 <bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver">
  <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
  <property name="prefix" value="/WEB-INF/jsp/" />
  <property name="suffix" value=".jsp" />
 </bean>
	<mvc:interceptors>
		<mvc:interceptor>
			<mvc:mapping path="/hello.html"/>
			<bean class="net.spring.interceptor.HelloWorldInterceptor1"/>
		</mvc:interceptor>
	</mvc:interceptors>
	  <!-- SpringMVC上传文件时，需要配置MultipartResolver处理器 --> 
	<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
		<property name="maxUploadSize" value="2000000000"></property>
	</bean>
	<!-- SpringMVC在超出上传文件限制时，会抛出org.springframework.web.multipart.MaxUploadSizeExceededException --> 
     </beans>

 

首先spring-servlet.xml的文件配置

xml文件的配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

    <display-name>Spring3MVC</display-name>
    <servlet>
        <servlet-name>spring</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>spring</servlet-name>
        <url-pattern>*.html</url-pattern>
     </servlet-mapping>

     <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list> 
</web-app>

单文件的同步上传：

//单文件上传
    @RequestMapping("/uploadOne")
    public void uploadOne(HttpServletRequest request, HttpServletResponse response) throws IOException {
        String path = request.getSession().getServletContext().getRealPath("/upload");
        MultipartHttpServletRequest  mhs = (MultipartHttpServletRequest )request; 
        CommonsMultipartFile cmf = ( CommonsMultipartFile)mhs.getFile("fileName");
        String name = null;
        FileItem fi = cmf.getFileItem();
        
        name = cmf.getOriginalFilename();
        InputStream fis = fi.getInputStream();
        mhs.getFile("fileName");
            File file = new File(path);
            if(!file.exists()){
                file.mkdirs();
            }
            int i=0;
            FileOutputStream fos = new FileOutputStream(new File(path+"/"+name));
            while((i=fis.read())!=-1){        
                fos.write(i);
            }
            fis.close();
            fos.close();
    }

多文件的同步上传：

//多文件上传
    @RequestMapping("/upload")
    public void upload(HttpServletRequest request, HttpServletResponse response) throws IOException {
        String filePath = request.getContextPath();
        String path = request.getSession().getServletContext().getRealPath("/upload");
        String message = null;
        MultipartHttpServletRequest  mhs = (MultipartHttpServletRequest )request; 
        List<MultipartFile> list =    mhs.getFiles("fileName");
       
        String name = null;
        try {
            File file = new File(path);
            if(!file.exists()){
                file.mkdirs();
            }
            FileOutputStream fos = null;
             for(int i = 0 ; i < list.size(); i++){
                     name = list.get(i).getOriginalFilename();
                      fos = new FileOutputStream(new File(path+"/"+name));
                    fos.write(list.get(i).getBytes());
                }
            fos.close();
            message = "<a herf='javascript:void(0)' onclick='"+path+"/"+name+"'>" +
            "hello.jsp" +
            "</a>";
            
        } catch (FileNotFoundException e1) {
            e1.printStackTrace();
        }
        try {
            response.getWriter().print(message);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

多文件的异步上传：需要用到ajaxupload.js插件

//多文件异步上传
    @RequestMapping("/ajaxupload")
    public void ajaxupload(HttpServletRequest request ,HttpServletResponse response) throws Exception {
        String path = request.getSession().getServletContext().getRealPath("/upload");
        String message = null;
        MultipartHttpServletRequest  mhs = (MultipartHttpServletRequest )request; 
        List<MultipartFile> list =    mhs.getFiles("formFile");
        SimpleDateFormat format = new SimpleDateFormat("yyyyMMddHHmmssSSS");
        Date d = new Date();
        String id = format.format(d).toString();       
        String name = null;
        File file = new File(path);
            if(!file.exists()){
                file.mkdirs();
            }
            FileOutputStream fos = null;
             for(int i = 0 ; i < list.size(); i++){
                     name = list.get(i).getOriginalFilename();
                      fos = new FileOutputStream(new File(path+"/"+name));
                        fos.write(list.get(i).getBytes());
                }
            message = "{\"id\":\""+id+"\",\"fjmc\":\""+name+"\"}";
            fos.close();
            response.getWriter().write(message);
    }

页面的html代码，此处只是示例

文件的下载，文件的删除

    //删除上传图片
    @RequestMapping("/deletePhoto")
    public void deletePhoto(HttpServletRequest request, HttpServletResponse response) throws IOException {
        String fjmc = request.getParameter("fjmc");
        String path = request.getSession().getServletContext().getRealPath("/")+"upload/"+fjmc;
        File file = new File(path);
        if(file.exists()){
            file.delete();
        }
        
    }