SpringMVC使用ajaxfileupload如何实现一个文件上传功能

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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

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 TypeMap = new HashMap();

  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('/', '\\')+"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

文件传输字段必须为file类型，如下：

其次，处理上传文件：

function ajaxFileUpload() {
  $.ajaxFileUpload({
    type: "POST",
    async: false,
    data: { "op": 'getImageUpload'},
    url:"Replay_ExpertManageController.do",
    dataType: 'json',
    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 = 'jUploadFrame' + id;
    
    if(window.ActiveXObject) {
      if(jQuery.browser.version=="9.0")
      {
        io = document.createElement('iframe');
        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;);
        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=$(&#39;<iframe name="&#39;+idIO+&#39;" id="&#39;+idIO+&#39;" >&#39;).appendTo(&#39;body&#39;);
    var jForm=$(&#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;&#63;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&#63;io.contentWindow.document.body.innerHTML:null;
           xml.responseXML = io.contentWindow.document.XMLDocument&#63;io.contentWindow.document.XMLDocument:io.contentWindow.document;
           
        }else if(io.contentDocument)
        {
           xml.responseText = io.contentDocument.document.body&#63;io.contentDocument.document.body.innerHTML:null;
           xml.responseXML = io.contentDocument.document.XMLDocument&#63;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" &#63; "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 &#63; 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("<div>").html(data).evalScripts();
 
    return data;
  }
});</pre></div><p>关于SpringMVC使用ajaxfileupload如何实现一个文件上传功能就分享到这里了，希望以上内容可以对大家有一定的帮助，可以学到更多知识。如果觉得文章不错，可以把它分享出去让更多的人看到。</p>            
            
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