spring mvc上传下载文件

前端jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>

<%

    String path = request.getContextPath();

    String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";

%>

<!DOCTYPE html>

<html>

<head>

<meta charset="utf-8">

<meta http-equiv="X-UA-Compatible" content="IE=edge">

<meta name="viewport" content="width=device-width, initial-scale=1">

<base href="<%=basePath%>">

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>文件上传</title>

<link href="js/b/css/bootstrap.min.css" rel="stylesheet">

<link href="js/b/css/bootstrap-theme.min.css" rel="stylesheet">

<link href="css/theme.css" rel="stylesheet">

<script src="js/b/js/jquery-1.11.1.min.js"></script>

<script src="js/b/js/bootstrap.min.js"></script>

<script src="js/ajaxfileupload.js"></script>

<script src="js/index.js"></script>

</head>

<body >

    <h2>表单提交的方式上传文件</h2>

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

        file:<input type="file" name="file" id="file" /><br>

        id:<input type="text" name="id" value="123" id="id" /><br>

        <input type="submit" value="提交" />

    </form>

    <hr>

    <h2>ajax文件上传方式</h2>

    file:<input type="file" name="file1" id="file1" />

    <input type="button" value="上传" id="btn01Id" />

</body>

</html>

前端js

/**

 * 页面加载之后执行的函数；=====================================

 */

$(function() {

});

/**

 * 元素事件注册函数；=====================================

 */

$(function() {

    $('#btn01Id').click(btn01IdClick);

});

/**

 * 全局变量定义部分；=====================================

 */

var i = 0;

/**

 * 事件编写部分；=====================================

 */

function btn01IdClick(e) {

    if(!$("#file1").val()){

        return ;

    }

    var sendData = {

        "id" : 123

    };

    $.ajaxFileUpload({

        url:'file/upload.do',

        secureuri:false,

        fileElementId:'file1',

        data : sendData,

        timeOut : 5000,

        success: function (data, status){

            alert("上传成功！");

        },

        error: function (data, status, e){

            alert("上传出错："+e);

        }

    });

}

ajaxfileuploadjs

jQuery.extend({

    createUploadIframe: function(id, uri)

    {

            //create frame

            var frameId = 'jUploadFrame' + id;

            var iframeHtml = '<iframe id="' + frameId + '" name="' + frameId + '" style="position:absolute; top:-9999px; left:-9999px"';

            if(window.ActiveXObject)

            {

                if(typeof uri== 'boolean'){

                    iframeHtml += ' src="' + 'javascript:false' + '"';

                }

                else if(typeof uri== 'string'){

                    iframeHtml += ' src="' + uri + '"';

                }

            }

            iframeHtml += ' />';

            jQuery(iframeHtml).appendTo(document.body);

            return jQuery('#' + frameId).get(0);

    },

    createUploadForm: function(id, fileElementId, data)

    {

        //create form

        var formId = 'jUploadForm' + id;

        var fileId = 'jUploadFile' + id;

        var form = jQuery('<form  action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');

        if(data)

        {

            for(var i in data)

            {

                jQuery('<input type="hidden" name="' + i + '" value="' + data[i] + '" />').appendTo(form);

            }

        }

        var oldElement = jQuery('#' + fileElementId);

        var newElement = jQuery(oldElement).clone();

        jQuery(oldElement).attr('id', fileId);

        jQuery(oldElement).before(newElement);

        jQuery(oldElement).appendTo(form);

        //set attributes

        jQuery(form).css('position', 'absolute');

        jQuery(form).css('top', '-1200px');

        jQuery(form).css('left', '-1200px');

        jQuery(form).appendTo('body');

        return form;

    },

    ajaxFileUpload: function(s) {

        // TODO introduce global settings, allowing the client to modify them for all requests, not only timeout

        s = jQuery.extend({}, jQuery.ajaxSettings, s);

        var id = new Date().getTime()

        var form = jQuery.createUploadForm(id, s.fileElementId, (typeof(s.data)=='undefined'?false:s.data));

        var io = jQuery.createUploadIframe(id, s.secureuri);

        var frameId = 'jUploadFrame' + id;

        var formId = 'jUploadForm' + id;

        // Watch for a new set of requests

        if ( s.global && ! jQuery.active++ )

        {

            jQuery.event.trigger( "ajaxStart" );

        }

        var requestDone = false;

        // Create the request object

        var xml = {}

        if ( s.global )

            jQuery.event.trigger("ajaxSend", [xml, s]);

        // Wait for a response to come back

        var uploadCallback = function(isTimeout)

        {

            var io = document.getElementById(frameId);

            try

            {

                if(io.contentWindow)

                {

                     xml.responseText = io.contentWindow.document.body?io.contentWindow.document.body.innerHTML:null;

                     xml.responseXML = io.contentWindow.document.XMLDocument?io.contentWindow.document.XMLDocument:io.contentWindow.document;

                }else if(io.contentDocument)

                {

                     xml.responseText = io.contentDocument.document.body?io.contentDocument.document.body.innerHTML:null;

                    xml.responseXML = io.contentDocument.document.XMLDocument?io.contentDocument.document.XMLDocument:io.contentDocument.document;

                }

            }catch(e)

            {

                jQuery.handleError(s, xml, null, e);

            }

            if ( xml || isTimeout == "timeout")

            {

                requestDone = true;

                var status;

                try {

                    status = isTimeout != "timeout" ? "success" : "error";

                    // Make sure that the request was successful or notmodified

                    if ( status != "error" )

                    {

                        // process the data (runs the xml through httpData regardless of callback)

                        var data = jQuery.uploadHttpData( xml, s.dataType );

                        // If a local callback was specified, fire it and pass it the data

                        if ( s.success )

                            s.success( data, status );

                        // Fire the global callback

                        if( s.global )

                            jQuery.event.trigger( "ajaxSuccess", [xml, s] );

                    } else

                        jQuery.handleError(s, xml, status);

                } catch(e)

                {

                    status = "error";

                    jQuery.handleError(s, xml, status, e);

                }

                // The request was completed

                if( s.global )

                    jQuery.event.trigger( "ajaxComplete", [xml, s] );

                // Handle the global AJAX counter

                if ( s.global && ! --jQuery.active )

                    jQuery.event.trigger( "ajaxStop" );

                // Process result

                if ( s.complete )

                    s.complete(xml, status);

                jQuery(io).unbind()

                setTimeout(function()

                                    {    try

                                        {

                                            jQuery(io).remove();

                                            jQuery(form).remove();    

                                        } catch(e)

                                        {

                                            jQuery.handleError(s, xml, null, e);

                                        }                                    

                                    }, 100)

                xml = null

            }

        }

        // Timeout checker

        if ( s.timeout > 0 )

        {

            setTimeout(function(){

                // Check to see if the request is still happening

                if( !requestDone ) uploadCallback( "timeout" );

            }, s.timeout);

        }

        try

        {

            var form = jQuery('#' + formId);

            jQuery(form).attr('action', s.url);

            jQuery(form).attr('method', 'POST');

            jQuery(form).attr('target', frameId);

            if(form.encoding)

            {

                jQuery(form).attr('encoding', 'multipart/form-data');

            }

            else

            {

                jQuery(form).attr('enctype', 'multipart/form-data');

            }

            jQuery(form).submit();

        } catch(e)

        {

            jQuery.handleError(s, xml, null, e);

        }

        jQuery('#' + frameId).load(uploadCallback    );

        return {abort: function () {}};    

    },

    uploadHttpData: function( r, type ) {

        var data = !type;

        data = type == "xml" || data ? r.responseXML : r.responseText;

        // If the type is "script", eval it in global context

        if ( type == "script" )

            jQuery.globalEval( data );

        // Get the JavaScript object, if JSON is used.

        if ( type == "json" )

            eval( "data = " + data );

        // evaluate scripts within html

        if ( type == "html" )

            jQuery("<div>").html(data).evalScripts();

        return data;

    }

})

后端controller

package com.srie.fileud.controller;

import java.io.BufferedInputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.OutputStream;

import java.io.UnsupportedEncodingException;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;

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

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

import org.springframework.web.multipart.MultipartFile;

@Controller

@RequestMapping("/file")

public class FileUD {

    @ResponseBody

    @RequestMapping("/upload")

    public String uploadFile(HttpServletRequest request, MultipartFile file1, Integer id) {

        System.out.println("id is : "+id);

        String name = file1.getName();

        System.out.println("name : "+name);

        String contentType = file1.getContentType();

        System.out.println("contentType : "+contentType);

        String originalFilename = file1.getOriginalFilename();

        System.out.println("originalFilename: "+originalFilename);

        long size = file1.getSize();

        System.out.println("size: "+size);

        boolean empty = file1.isEmpty();

        System.out.println("empty: "+empty);

        File saveFile = new File(request.getServletContext().getRealPath("/file"), originalFilename);

        try {

            file1.transferTo(saveFile);

        } catch (Exception e) {

            e.printStackTrace();

        }

        return "asdf";

    }

    @ResponseBody

    @RequestMapping(value="/download")

    public String downFile(HttpServletRequest request, HttpServletResponse response){

        String directory = request.getServletContext().getRealPath("/file");

        File file = new File(directory,"123");

        if(file.exists()){

            response.setContentType("application/octet-stream;charset=ISO8859-1");

            String name = "《中文》09aa囿気.docx";

            String name2 = "a.docx";

            try {

                name2 = new String(name.getBytes(),"ISO8859-1");

            } catch (UnsupportedEncodingException e1) {

                e1.printStackTrace();

            }

            response.addHeader("content-disposition", "attachment;filename="+name2);

            byte[] buffer = new byte[1024];

            FileInputStream fis = null;

            BufferedInputStream bis = null;

            try {

                fis = new FileInputStream(file);

                bis = new BufferedInputStream(fis);

                OutputStream os = response.getOutputStream();

                int i = bis.read(buffer);

                while(i!=-1){

                    os.write(buffer,0,i);

                    i = bis.read(buffer);

                }

            } catch (Exception e) {

                e.printStackTrace();

            }finally {

                if(bis!=null){

                    try {

                        bis.close();

                    } catch (Exception e2) {

                        e2.printStackTrace();

                    }

                }

                if(fis != null){

                    try {

                        fis.close();

                    } catch (Exception e2) {

                        e2.printStackTrace();

                    }

                }

            }

        }

        return null;

    }

}

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_2_5.xsd"

    id="WebApp_ID" version="2.5">

    <display-name>fileud</display-name>

    <listener>

        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

    </listener>

    <context-param>

        <param-name>contextConfigLocation</param-name>

        <param-value>classpath:beans.xml</param-value>

    </context-param>

    <servlet>

        <servlet-name>springMVC</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>springMVC</servlet-name>

        <url-pattern>*.do</url-pattern>

    </servlet-mapping>

    <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>

    </filter>

    <filter-mapping>

        <filter-name>characterEncodingFilter</filter-name>

        <url-pattern>*.do</url-pattern>

    </filter-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>

    <context-param>

        <param-name>spring.profiles.active</param-name>

        <param-value>dev</param-value>

    </context-param>

    <context-param>

        <param-name>spring.profiles.default</param-name>

        <param-value>dev</param-value>

    </context-param>

    <context-param>

        <param-name>spring.liveBeansView.mbeanDomain</param-name>

        <param-value>dev</param-value>

    </context-param>

</web-app>

springmvc.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:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"

    xmlns:dwr="http://www.directwebremoting.org/schema/spring-dwr"

    xsi:schemaLocation="http://www.springframework.org/schema/mvc

     http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd

        http://www.springframework.org/schema/beans

        http://www.springframework.org/schema/beans/spring-beans-4.1.xsd

        http://www.springframework.org/schema/context

        http://www.springframework.org/schema/context/spring-context-4.1.xsd

        http://www.directwebremoting.org/schema/spring-dwr

        http://www.directwebremoting.org/schema/spring-dwr-3.0.xsd">

    <!-- spring mvc 注解驱动 -->

    <mvc:annotation-driven />

    <!-- 扫描器 -->

    <context:component-scan base-package="com.srie.fileud.controller" />

    <!-- 配置视图 解析器 -->

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">

        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />

        <!-- 前缀和后缀 -->

        <property name="prefix" value="/WEB-INF/jsp/"></property>

        <property name="suffix" value=".jsp"></property>

    </bean>

    <!-- 文件上传配置 -->

    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

        <property name="maxUploadSize" value="200000" />

    </bean>

    <!-- 从请求和响应读取/编写字符串 -->

    <bean id="stringHttpMessage" class="org.springframework.http.converter.StringHttpMessageConverter">

        <property name="supportedMediaTypes">

            <list>

                <value>text/plain;charset=UTF-8</value>

            </list>

        </property>

    </bean>

    <!-- 用于将对象转换为JSON -->

    <bean id="jsonConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean>

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

        <property name="messageConverters">

            <list>

                <ref bean="stringHttpMessage" />

                <ref bean="jsonConverter" />

            </list>

        </property>

    </bean>

</beans>

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