springmvc文件上传的踩坑之路

学习springmvc文件上传可谓是一波三折。这里我就分享下我的踩坑之路吧

首先是代码

<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>上传文件</title>
</head>
<body>
<form action="/upfile.do" method="post" enctype="multipart/form-data">
    <input type="file" name="file"/>
    <input type="submit" value="上传" />
</form>
</body>
</html>

 controller

 @RequestMapping(value = "/upfile",method= RequestMethod.POST)
    public String fileUpload(@RequestParam("file") MultipartFile file, HttpServletRequest request) {
        // 判断文件是否为空
        if (!file.isEmpty()) {
            try {
                // 文件保存路径
               String filePath = request.getSession().getServletContext().getRealPath("/") + "update/"
                      + file.getOriginalFilename();

                // 转存文件
                file.transferTo(new File(filePath));
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        // 重定向
        return "success";
    }

springmvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:aop="http://www.springframework.org/schema/aop"
       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.xsd  
    http://www.springframework.org/schema/mvc   
    http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
    ">
    <mvc:annotation-driven></mvc:annotation-driven>
    <context:annotation-config/>
    <context:component-scan base-package="Controller"/>
    <context:component-scan base-package="dao"></context:component-scan>
    <context:component-scan base-package="Service"></context:component-scan>
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/">
        </property>
        <property name="suffix" value=".jsp"></property>
    </bean>
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
            <property name="defaultEncoding" value="utf-8"></property>
        <property name="maxUploadSize" value="104857600000"></property>
        <property name="maxInMemorySize" value="40960"></property>
    </bean>
</beans>

web.xml

<?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">

    <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
</context-param>
    <session-config>
        <session-timeout>20</session-timeout>
    </session-config>
    <!--spring 字符过滤器-->
    <filter>
        <filter-name>filterEncoding</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>
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>filterEncoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <listener>
        <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
    </listener>
    <servlet>
        <servlet-name>Dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>Dispatcher</servlet-name>
     <url-pattern>*.do</url-pattern>
    </servlet-mapping>

以上是通过的代码。错误的我就不拿出来丢人了。主要是说几点注意

1.<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">必须设置id。否则会报

2.表单必须设置method=“post”和enctype=“multipart/form-data”.不然会报

 

3.接收文件使用multipartFile。

暂时就先学到这里。以上只是个人的解决方法。如果有什么错了，还望指出

posted @ 2017-02-21 22:35  戴林甫  阅读(317)  评论(0)  编辑  收藏  举报