springmvc文件上传

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注意点 :

需要配置multipartResolver解析器进行文件上传
springmvc默认使用commons-fileupload上传文件,需要引入commons-fileupload 和 commons-io 两个包

web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    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_3_0.xsd"    id="WebApp_ID" version="3.0">    <context-param>        <param-name>contextConfigLocation</param-name>        <param-value>classpath:spring.xml</param-value>    </context-param>    <filter>        <filter-name>characterEncodingFilter</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>        <filter-name>hiddenHttpMethodFilter</filter-name>        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>    </filter>    <filter-mapping>        <filter-name>hiddenHttpMethodFilter</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping>    <filter-mapping>        <filter-name>characterEncodingFilter</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping>    <listener>        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>    </listener>    <servlet>        <servlet-name>dispatcherServlet</servlet-name>        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>        <init-param>            <param-name>contextConfigLocation</param-name>            <param-value>classpath:spring-mvc.xml</param-value>        </init-param>    </servlet>    <servlet-mapping>        <servlet-name>dispatcherServlet</servlet-name>        <url-pattern>/</url-pattern>    </servlet-mapping>    <welcome-file-list>        <welcome-file>index.html</welcome-file>        <welcome-file>index.htm</welcome-file>        <welcome-file>index.jsp</welcome-file>        <welcome-file>default.html</welcome-file>        <welcome-file>default.htm</welcome-file>        <welcome-file>default.jsp</welcome-file>    </welcome-file-list></web-app>

spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:util="http://www.springframework.org/schema/util"    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"    xmlns:context="http://www.springframework.org/schema/context"    xmlns:mvc="http://www.springframework.org/schema/mvc"    xsi:schemaLocation="http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans.xsd        http://www.springframework.org/schema/util         http://www.springframework.org/schema/util/spring-util.xsd        http://www.springframework.org/schema/aop        http://www.springframework.org/schema/aop/spring-aop.xsd        http://www.springframework.org/schema/tx        http://www.springframework.org/schema/tx/spring-tx.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.xsd">    <context:component-scan base-package="com.yc.us.web" />    <bean id="viewResolver"        class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <property name="prefix" value="/" />        <property name="suffix" value=".jsp" /> <!-- 给视图加上后缀 如:视图是success,返回是success.jsp -->    </bean>    <mvc:default-servlet-handler />    <mvc:annotation-driven />    <bean id="multipartResolver"        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">        <!-- 设置上传文件的最大尺寸1024字节=1K -->        <property name="maxUploadSize">            <value>1024000</value>        </property>        <property name="defaultEncoding">            <value>UTF-8</value>        </property>    </bean></beans>

Handler

    @RequestMapping(path="/modify",method=RequestMethod.POST)    @ResponseBody    public boolean modify(@RequestParam(name="pic",required=false)MultipartFile file,User user,HttpServletRequest request){        System.out.println(file);        if(file!=null&&!file.isEmpty()){            String path = new File(request.getSession().getServletContext().getRealPath("/")).getParent()+"\\upload\\"+file.getOriginalFilename();            System.out.println(path);            File saveTargetFile = new File(path);            if(!saveTargetFile.exists()){                try {                    saveTargetFile.createNewFile();                } catch (IOException e) {                    return false;                }            }            //保存            try {                file.transferTo(saveTargetFile);            } catch (IllegalStateException | IOException e) {                return false;            }        }        System.out.println(user);        return true;    }

Form

<form id="modifyForm" method="post" enctype="multipart/form-data">            <p><input id="uid" name="id" readonly="readonly"></p>            <p><input id="uname" name="name"></p>            <p><input id="ubirthday" name="birthday"></p>            <p><input id="ugender" name="gender"></p>            <p><input id="ucareer" name="career"></p>            <p><input id="uaddress" name="address"></p>            <p><input id="umobile" name="mobile"></p>            <p><input type="file" id="upic" name="pic" onChange='changePic(this)'><br>                <img src="image/not_pic.jpg" id=pic>            </p>            <p><a class='closebtn' href='javascript:void(0)'>关闭</a>&nbsp;&nbsp;            <a class='updatebtn' href='javascript:void(0)'>修改</a>            </p>        </form>

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