spring mvc(注解)上传文件的简单例子 -凯发k8官方网

 spring mvc(注解)上传文件的简单例子,这有几个需要注意的地方
1.form的enctype=”multipart/form-data” 这个是上传文件必须的
2.applicationcontext.xml中 关于文件上传的配置不能少

 

大家可以看具体代码如下:

 

web.xml

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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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 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">  

  <display-name>webtestdisplay-name>  

  

  <listener>  

        <listener-class>org.springframework.web.context.contextloaderlistenerlistener-class>  

    listener>  

    <context-param>  

        <param-name>contextconfiglocationparam-name>  

        <param-value>  

            /web-inf/config/applicationcontext.xml  

            /web-inf/config/codeifaction.xml  

        param-value>  

    context-param>  

  

    <servlet>  

        <servlet-name>dispatcherservletservlet-name>  

        <servlet-class>org.springframework.web.servlet.dispatcherservletservlet-class>  

        <init-param>  

            <param-name>contextconfiglocationparam-name>  

            <param-value>/web-inf/config/codeifaction.xmlparam-value>  

        init-param>  

        <load-on-startup>1load-on-startup>  

    servlet>  

      

    <servlet-mapping>  

        <servlet-name>dispatcherservletservlet-name>  

        <url-pattern>*.dourl-pattern>  

    servlet-mapping>  

  

  <welcome-file-list>  

    <welcome-file>index.dowelcome-file>  

  welcome-file-list>  

web-app>  

 

 

applicationcontext.xml

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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: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"  

    default-lazy-init="true">  

  

      

    <bean class="org.springframework.web.servlet.mvc.annotation.annotationmethodhandleradapter" lazy-init="false" />  

  

      

    <bean class="org.springframework.web.servlet.mvc.annotation.defaultannotationhandlermapping" />  

  

      

    <bean class="org.springframework.web.servlet.view.internalresourceviewresolver" p:prefix="/web-inf/jsp/" p:suffix=".jsp" />  

  

      

    <bean id="multipartresolver" class="org.springframework.web.multipart.commons.commonsmultipartresolver"/>  

  

beans>  

 

 

codeifaction.xml

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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: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"  

    default-lazy-init="true">  

  

    <bean id="uploadaction" class="com.codeif.action.uploadaction" />  

  

beans>  

 

 

uploadaction.java

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package com.codeif.action;  

  

import java.io.file;  

import java.util.date;  

  

import javax.servlet.http.httpservletrequest;  

  

import org.springframework.stereotype.controller;  

import org.springframework.ui.modelmap;  

import org.springframework.web.bind.annotation.requestmapping;  

import org.springframework.web.bind.annotation.requestparam;  

import org.springframework.web.multipart.multipartfile;  

  

@controller  

public class uploadaction {  

  

    @requestmapping(value = "/upload.do")  

    public string upload(@requestparam(value = "file", required = false) multipartfile file, httpservletrequest request, modelmap model) {  

  

        system.out.println("开始");  

        string path = request.getsession().getservletcontext().getrealpath("upload");  

        string filename = file.getoriginalfilename();  

//        string filename = new date().gettime() ".jpg";  

        system.out.println(path);  

        file targetfile = new file(path, filename);  

        if(!targetfile.exists()){  

            targetfile.mkdirs();  

        }  

  

        //保存  

        try {  

            file.transferto(targetfile);  

        } catch (exception e) {  

            e.printstacktrace();  

        }  

        model.addattribute("fileurl", request.getcontextpath() "/upload/" filename);  

  

        return "result";  

    }  

  

}  

 

index.jsp

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<%@ page pageencoding="utf-8"%>  

>  

<html>  

<head>  

<meta charset="utf-8">  

<title>上传图片title>  

head>  

<body>  

<form action="upload.do" method="post" enctype="multipart/form-data">  

<input type="file" name="file" /> <input type="submit" value="submit" />form>  

body>  

html>  

 

web-inf/jsp/下的result.jsp

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<%@ page pageencoding="utf-8"%>  

>  

<html>  

<head>  

<meta charset="utf-8">  

<title>上传结果title>  

head>  

<body>  

<img alt="" src="${fileurl }" />  

body>  

html>  

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