search
HomeJavajavaTutorialCode example of using ajaxfileupload to implement refresh-free upload

Code example of using ajaxfileupload to implement refresh-free upload

Y2J
Y2J
May 05, 2017 pm 02:45 PM
ajaxfileupload

本篇文章主要介绍了SpringMVC结合ajaxfileupload实现文件无刷新上传，具有一定的参考价值，感兴趣的小伙伴们可以参考一下。

jQuery没有提供ajax的文件上传，我们可以通过ajaxfileupload实现ajax文件的上传。其实ajaxfileupload文件上传特别的简单。下面就演示一下在SpringMVC中实现ajax的文件上传。

1、后台接收代码

首先在spring的配置文件中添加文件上传配置  

<!-- 文件上传 -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="defaultEncoding" value="UTF-8"/> 
</bean>

再写文件接收的代码

package com.chinaunicom.jlmssp.controller;

import java.io.File;
import java.io.IOException;
import java.util.Arrays;
import java.util.Date;
import java.util.HashMap;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.commons.CommonsMultipartFile;

import com.chinaunicom.jlmssp.model.DataResponse;
import com.chinaunicom.jlmssp.model.JavaToJsMsg;
import com.chinaunicom.jlmssp.model.Org_UserInfo;
import com.chinaunicom.jlmssp.model.Repaly_Expert_Home_Page;
import com.chinaunicom.jlmssp.services.Replay_ExpertManageService;

/**
 * 项目复制管理子系统
 * 专家云管理
 * @author SunYue
 * @version 0.1
 */
@Controller
@RequestMapping("/admin/Replay_ExpertManageController.do")
public class Replay_ExpertManageController {
  
  private static final HashMap<String, String> TypeMap = new HashMap<String, String>();

  static {
    TypeMap.put("image", "gif,jpg,jpeg,png,bmp");
    TypeMap.put("flash", "swf,flv");
    TypeMap.put("media", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");
    TypeMap.put("file", "doc,docx,xls,xlsx,ppt,pptx,htm,html,txt,dwg,pdf");
  }


  @Autowired
  Replay_ExpertManageService replayExpertManageService;
    
    /**
     * @author sunyue
     * @date 2017年2月28日 下午12:49:33
     * @Description: 图片上传方法
     * @return message: -1 没有文件上传 0 上传成功 1 上传失败 2 文件超过上传大小 3 文件格式错误 4 上传文件路径非法 5 上传目录没有写权限
     * @return void 返回类型
     */
    @RequestMapping(params = "op=getImageUpload", method = RequestMethod.POST)
    public void getImageUpload(@RequestParam("upload") CommonsMultipartFile file,HttpServletRequest request,
        HttpServletResponse response) {
      if (!file.isEmpty()) {
        /*ServletContext servletContext = request.getSession()
            .getServletContext();
        String uploadPath = servletContext.getRealPath("/")
            + "images\\replay-expert\\";
        
        String upPathString = request.getServletPath(); */
        
        //获取项目工作空间下工程路径的方法，将图片保存到工程路径下
        String t=Thread.currentThread().getContextClassLoader().getResource("").getPath();
         int num=t.indexOf(".metadata");
         String uploadPath=t.substring(1,num).replace(&#39;/&#39;, &#39;\\&#39;)+"jl_mssp_V3_0\\WebContent\\images\\replay-expert\\";
        
        // 文件上传大小
        long fileSize = 3 * 1024 * 1024;

        if (file.getSize() > fileSize) {
          backInfo(response, false, 2, "");
          return;
        }

        String OriginalFilename = file.getOriginalFilename();

        String fileSuffix = OriginalFilename.substring(
            OriginalFilename.lastIndexOf(".") + 1).toLowerCase();
        if (!Arrays.asList(TypeMap.get("image").split(",")).contains(
            fileSuffix)) {
          backInfo(response, false, 3, "");
          return;
        }

        if (!ServletFileUpload.isMultipartContent(request)) {
          backInfo(response, false, -1, "");
          return;
        }

        // 检查上传文件的目录
        File uploadDir = new File(uploadPath);
        if (!uploadDir.isDirectory()) {
          if (!uploadDir.mkdir()) {
            backInfo(response, false, 4, "");
            return;
          }
        }

        // 是否有上传的权限
        if (!uploadDir.canWrite()) {
          backInfo(response, false, 5, "");
          return;
        }
        
        //新文件名
        String newname = "";
        /*if(null != filePre){
          newname += filePre;//对应模块上传的文件名前缀
        }*/
        
         newname +=  "test1111" + "." + fileSuffix;

        File saveFile = new File(uploadPath, newname);

        try {
          file.transferTo(saveFile);
          backInfo(response, true, 0, newname);
        } catch (Exception e) {
          //LOG.error(e.getMessage(), e);
          backInfo(response, false, 1, "");
          return;
        }
      } else {
        backInfo(response, false, -1, "");
        return;
      }
    }
    
    // 返回信息
    private void backInfo(HttpServletResponse response, boolean flag, int message,
        String fileName) {
      String json = "";
      if (flag) {
        json = "{ \"status\": \"success";
      } else {
        json = "{ \"status\": \"error";
      }
      json += "\",\"fileName\": \"" + fileName + "\",\"message\": \"" + message + "\"}";
      try {
        response.setContentType("text/html;charset=utf-8");
        response.getWriter().write(json);
      } catch (IOException e) {
        //LOG.error(e.getMessage(), e);
      }
    }
}

2、前台接受代码

使用ajaxfileupload时，首先下载ajaxfileupload文件，导入对应的js文件   

<script type="text/javascript" src="js/ajaxfileupload.js"></script>

文件传输字段必须为file类型，如下：

<input type="file" id="file" name="file" onchange="ajaxFileUpload();"/>

 其次，处理上传文件： 

function ajaxFileUpload() {
  $.ajaxFileUpload({
    type: "POST",
    async: false,
    data: { "op": &#39;getImageUpload&#39;},
    url:"Replay_ExpertManageController.do",
    dataType: &#39;json&#39;,
    secureuri: false,
    fileElementId: "upload",
    success: function(data, status) {
      if (data.status == "success") {
        //上传成功
        alert("上传照片成功");
      }
      switch(data.message){
       //解析上传状态
        case "0" : //上传成功
              break;
        case "-1" : //上传文件不能为空
             break;
        default: //上传失败
           break;
      }
      return false;
    }/* ,
    error : function (jqXHR, textStatus, errorThrown) {
      //弹出jqXHR对象的信息
      alert(jqXHR.responseText);
      //alert(jqXHR.status);
      //alert(jqXHR.readyState);
      //alert(jqXHR.statusText);
        //弹出其他两个参数的信息
      //alert(textStatus);
      alert(errorThrown);
      return false;
    } */
  });
}

三、由于网上的ajaxuploadfile文件都是高版本的，这里将改版完全版文件传上，自己使用

jQuery.extend({
  handleError: function( s, xhr, status, e )     {
    // If a local callback was specified, fire it
        if ( s.error ) {
          s.error.call( s.context || s, xhr, status, e );
        }

        // Fire the global callback
        if ( s.global ) {
          (s.context ? jQuery(s.context) : jQuery.event).trigger( "ajaxError", [xhr, s, e] );
        }
  },
  createUploadIframe: function(id, uri)
  {
 
    var frameId = &#39;jUploadFrame&#39; + id;
    
    if(window.ActiveXObject) {
      if(jQuery.browser.version=="9.0")
      {
        io = document.createElement(&#39;iframe&#39;);
        io.id = frameId;
        io.name = frameId;
      }
      else if(jQuery.browser.version=="6.0" || jQuery.browser.version=="7.0" || jQuery.browser.version=="8.0")
      {
      
        var io = document.createElement(&#39;<iframe id="&#39; + frameId + &#39;" name="&#39; + frameId + &#39;" />&#39;);
        if(typeof uri== &#39;boolean&#39;){
          io.src = &#39;javascript:false&#39;;
        }
        else if(typeof uri== &#39;string&#39;){
          io.src = uri;
        }
      }
    }
    else {
      var io = document.createElement(&#39;iframe&#39;);
      io.id = frameId;
      io.name = frameId;
    }
    io.style.position = &#39;absolute&#39;;
    io.style.top = &#39;-1000px&#39;;
    io.style.left = &#39;-1000px&#39;;

    document.body.appendChild(io);

    return io;    
  },
  ajaxUpload:function(s,xml){
    //if((fromFiles.nodeType&&!((fileList=fromFiles.files)&&fileList[0].name)))

    var uid = new Date().getTime(),idIO=&#39;jUploadFrame&#39;+uid,_this=this;
    var jIO=$(&#39;<iframe name="&#39;+idIO+&#39;" id="&#39;+idIO+&#39;" style="display:none">&#39;).appendTo(&#39;body&#39;);
    var jForm=$(&#39;<form action="&#39;+s.url+&#39;" target="&#39;+idIO+&#39;" method="post" enctype="multipart/form-data"></form>&#39;).appendTo(&#39;body&#39;);
    var oldElement = $(&#39;#&#39;+s.fileElementId);
    var newElement = $(oldElement).clone();
    $(oldElement).attr(&#39;id&#39;, &#39;jUploadFile&#39;+uid);
    $(oldElement).before(newElement);
    $(oldElement).appendTo(jForm);

    this.remove=function()
    {
      if(_this!==null)
      {
        jNewFile.before(jOldFile).remove();
        jIO.remove();jForm.remove();
        _this=null;
      }
    }
    this.onLoad=function(){
    
      var data=$(jIO[0].contentWindow.document.body).text();
  
  
      try{

        if(data!=undefined){
          data = eval(&#39;(&#39; + data + &#39;)&#39;);
          try {
            
            if (s.success)
              s.success(data, status);
  
            // Fire the global callback
            if(s.global)
              jQuery.event.trigger("ajaxSuccess", [xml, s]);
            if (s.complete)
              s.complete(data, status);
            xml = null;
           } 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
   
        }
     }catch(ex){
       alert(ex.message);
     };
    }
    this.start=function(){jForm.submit();jIO.load(_this.onLoad);};
    return this;
     
  },
  createUploadForm: function(id, url,fileElementId, data)
  {
    //create form  
    var formId = &#39;jUploadForm&#39; + id;
    var fileId = &#39;jUploadFile&#39; + id;
    var form = jQuery(&#39;<form action="&#39;+url+&#39;" method="POST" name="&#39; + formId + &#39;" id="&#39; + formId + &#39;" enctype="multipart/form-data"></form>&#39;);  
    if(data)
    {
      for(var i in data)
      {
        jQuery(&#39;<input type="hidden" name="&#39; + i + &#39;" value="&#39; + data[i] + &#39;" />&#39;).appendTo(form);
      }      
    }  

    var oldElement = jQuery(&#39;#&#39; + fileElementId);
    var newElement = jQuery(oldElement).clone();
    jQuery(oldElement).attr(&#39;id&#39;, fileId);
    jQuery(oldElement).before(newElement);
    jQuery(oldElement).appendTo(form);

    //set attributes
    jQuery(form).css(&#39;position&#39;, &#39;absolute&#39;);
    jQuery(form).css(&#39;top&#39;, &#39;-1200px&#39;);
    jQuery(form).css(&#39;left&#39;, &#39;-1200px&#39;);
    jQuery(form).appendTo(&#39;body&#39;);    
    return form;
  },
  ajaxFileUpload: function(s) {
    // TODO introduce global settings, allowing the client to modify them for all requests, not only timeout  
    // Create the request object
    var xml = {};
    s = jQuery.extend({}, jQuery.ajaxSettings, s);
    if(window.ActiveXObject){
      var upload = new jQuery.ajaxUpload(s,xml);
      upload.start();
     
    }else{
    var id = new Date().getTime();
    var form = jQuery.createUploadForm(id,s.url, s.fileElementId, (typeof(s.data)==&#39;undefined&#39;?false:s.data));
    var io = jQuery.createUploadIframe(id, s.secureuri);
    var frameId = &#39;jUploadFrame&#39; + id;
    var formId = &#39;jUploadForm&#39; + id;    
    // Watch for a new set of requests
    if ( s.global && ! jQuery.active++ )
    {
      jQuery.event.trigger( "ajaxStart" );
    }      
    var requestDone = false;
  
    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]);
            if (s.complete)
              s.complete(data, status);
            
          } 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
        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(&#39;#&#39; + formId);
          jQuery(form).attr(&#39;action&#39;, s.url);
          jQuery(form).attr(&#39;method&#39;, &#39;POST&#39;);
          jQuery(form).attr(&#39;target&#39;, frameId);
          
          if(form.encoding)
          {
            jQuery(form).attr(&#39;encoding&#39;, &#39;multipart/form-data&#39;);         
          }
          else
          {  
            jQuery(form).attr(&#39;enctype&#39;, &#39;multipart/form-data&#39;);      
          }  
     
          
          jQuery(form).submit();
    
        } catch(e)
        {  
          jQuery.handleError(s, xml, null, e);
        }
        
        jQuery(&#39;#&#39;+ 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).html() );
    }
    // evaluate scripts within html
    if ( type == "html" )
      jQuery("<p>").html(data).evalScripts();
 
    return data;
  }
});

【相关推荐】

1. Java免费视频教程

2. JAVA教程手册

3. Java实现图片等比例缩略图视频教程

The above is the detailed content of Code example of using ajaxfileupload to implement refresh-free upload. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Related Article
Explain how the JVM acts as an intermediary between the Java code and the underlying operating system.Explain how the JVM acts as an intermediary between the Java code and the underlying operating system.Apr 29, 2025 am 12:23 AM

JVM works by converting Java code into machine code and managing resources. 1) Class loading: Load the .class file into memory. 2) Runtime data area: manage memory area. 3) Execution engine: interpret or compile execution bytecode. 4) Local method interface: interact with the operating system through JNI.

Explain the role of the Java Virtual Machine (JVM) in Java's platform independence.Explain the role of the Java Virtual Machine (JVM) in Java's platform independence.Apr 29, 2025 am 12:21 AM

JVM enables Java to run across platforms. 1) JVM loads, validates and executes bytecode. 2) JVM's work includes class loading, bytecode verification, interpretation execution and memory management. 3) JVM supports advanced features such as dynamic class loading and reflection.

What steps would you take to ensure a Java application runs correctly on different operating systems?What steps would you take to ensure a Java application runs correctly on different operating systems?Apr 29, 2025 am 12:11 AM

Java applications can run on different operating systems through the following steps: 1) Use File or Paths class to process file paths; 2) Set and obtain environment variables through System.getenv(); 3) Use Maven or Gradle to manage dependencies and test. Java's cross-platform capabilities rely on the JVM's abstraction layer, but still require manual handling of certain operating system-specific features.

Are there any areas where Java requires platform-specific configuration or tuning?Are there any areas where Java requires platform-specific configuration or tuning?Apr 29, 2025 am 12:11 AM

Java requires specific configuration and tuning on different platforms. 1) Adjust JVM parameters, such as -Xms and -Xmx to set the heap size. 2) Choose the appropriate garbage collection strategy, such as ParallelGC or G1GC. 3) Configure the Native library to adapt to different platforms. These measures can enable Java applications to perform best in various environments.

What are some tools or libraries that can help you address platform-specific challenges in Java development?What are some tools or libraries that can help you address platform-specific challenges in Java development?Apr 29, 2025 am 12:01 AM

OSGi,ApacheCommonsLang,JNA,andJVMoptionsareeffectiveforhandlingplatform-specificchallengesinJava.1)OSGimanagesdependenciesandisolatescomponents.2)ApacheCommonsLangprovidesutilityfunctions.3)JNAallowscallingnativecode.4)JVMoptionstweakapplicationbehav

How does the JVM manage garbage collection across different platforms?How does the JVM manage garbage collection across different platforms?Apr 28, 2025 am 12:23 AM

JVMmanagesgarbagecollectionacrossplatformseffectivelybyusingagenerationalapproachandadaptingtoOSandhardwaredifferences.ItemploysvariouscollectorslikeSerial,Parallel,CMS,andG1,eachsuitedfordifferentscenarios.Performancecanbetunedwithflagslike-XX:NewRa

Why can Java code run on different operating systems without modification?Why can Java code run on different operating systems without modification?Apr 28, 2025 am 12:14 AM

Java code can run on different operating systems without modification, because Java's "write once, run everywhere" philosophy is implemented by Java virtual machine (JVM). As the intermediary between the compiled Java bytecode and the operating system, the JVM translates the bytecode into specific machine instructions to ensure that the program can run independently on any platform with JVM installed.

Describe the process of compiling and executing a Java program, highlighting platform independence.Describe the process of compiling and executing a Java program, highlighting platform independence.Apr 28, 2025 am 12:08 AM

The compilation and execution of Java programs achieve platform independence through bytecode and JVM. 1) Write Java source code and compile it into bytecode. 2) Use JVM to execute bytecode on any platform to ensure the code runs across platforms.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Show More

Hot Article

What's New in Windows 11 KB5054979 & How to Fix Update Issues
3 weeks agoByDDD
How to fix KB5055523 fails to install in Windows 11?
2 weeks agoByDDD
InZoi: How To Apply To School And University
3 weeks agoByDDD
How to fix KB5055518 fails to install in Windows 10?
2 weeks agoByDDD
Roblox: Dead Rails – How To Summon And Defeat Nikola Tesla
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Show More

Hot Tools

Atom editor mac version download

Atom editor mac version download

The most popular open source editor

DVWA

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Show More

Hot Topics

Where is the login entrance for gmail email?
7816
15
Java Tutorial
1646
14
CakePHP Tutorial
1402
52
Laravel Tutorial
1300
25
PHP Tutorial
1238
29
Show More