SpringMVC结合ajaxfileupload实现文件无刷新上传代码

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('/', '\\')+"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": '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('<iframe id="' + frameid + '" name="' + frameid + '" />');
        if(typeof uri== 'boolean'){
          io.src = 'javascript:false';
        }
        else if(typeof uri== 'string'){
          io.src = uri;
        }
      }
    }
    else {
      var io = document.createelement('iframe');
      io.id = frameid;
      io.name = frameid;
    }
    io.style.position = 'absolute';
    io.style.top = '-1000px';
    io.style.left = '-1000px';

    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='juploadframe'+uid,_this=this;
    var jio=$('<iframe name="'+idio+'" id="'+idio+'" style="display:none">').appendto('body');
    var jform=$('<form action="'+s.url+'" target="'+idio+'" method="post" enctype="multipart/form-data"></form>').appendto('body');
    var oldelement = $('#'+s.fileelementid);
    var newelement = $(oldelement).clone();
    $(oldelement).attr('id', 'juploadfile'+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('(' + data + ')');
          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 = 'juploadform' + id;
    var fileid = 'juploadfile' + id;
    var form = jquery('<form action="'+url+'" 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  
    // 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)=='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;
  
    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('#' + 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).html() );
    }
    // evaluate scripts within html
    if ( type == "html" )
      jquery("<div>").html(data).evalscripts();
 
    return data;
  }
});

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