spring MVC + bootstrap实现文件上传示例（带进度条）_Java

最近学习了bootstrap，有结合了spring mvc写了个文件上传的示例，留做笔记，废话不多说，直接上代码

监听器类fileuploadprogresslistener.java

package com.gpl.web.listener;  
import javax.servlet.http.httpsession; 
 
import org.apache.commons.fileupload.progresslistener; 
import org.springframework.stereotype.component; 
 
import com.gpl.web.utils.progress; 
 
 
@component 
public class fileuploadprogresslistener implements progresslistener{ 
 
  private httpsession session; 
   
  public void setsession(httpsession session){ 
    this.session = session; 
    progress status = new progress(); 
    session.setattribute("status", status); 
  } 
  @override 
  public void update(long bytesread, long contentlength, int items) { 
    progress status = (progress) session.getattribute("status"); 
    status.setbytesread(bytesread); 
    status.setcontentlength(contentlength); 
    status.setitems(items); 
  } 
 
}

customermyltipartresolver.java

package com.gpl.web.listener;  
import java.util.list; 
import javax.servlet.http.httpservletrequest;  
import org.apache.commons.fileupload.fileitem; 
import org.apache.commons.fileupload.fileupload; 
import org.apache.commons.fileupload.fileuploadbase; 
import org.apache.commons.fileupload.fileuploadexception; 
import org.apache.commons.fileupload.servlet.servletfileupload; 
import org.springframework.beans.factory.annotation.autowired; 
import org.springframework.web.multipart.maxuploadsizeexceededexception; 
import org.springframework.web.multipart.multipartexception; 
import org.springframework.web.multipart.commons.commonsmultipartresolver; 
 
public class custommultipartresolver extends commonsmultipartresolver{ 
   
  @autowired 
  private fileuploadprogresslistener progresslistener; 
   
  public void setfileuploadprogresslistener(fileuploadprogresslistener progresslistener){ 
    this.progresslistener = progresslistener; 
  } 
   
  public multipartparsingresult parsingresult(httpservletrequest request){ 
    string encoding = determineencoding(request); 
    fileupload fileupload = preparefileupload(encoding); 
    progresslistener.setsession(request.getsession()); 
    fileupload.setprogresslistener(progresslistener); 
    try{ 
      list<fileitem> fileitems = ((servletfileupload) fileupload).parserequest(request); 
      return parsefileitems(fileitems, encoding); 
    }catch(fileuploadbase.sizelimitexceededexception ex){ 
      throw new maxuploadsizeexceededexception(fileupload.getsizemax(), ex); 
    }catch (fileuploadexception e) { 
      throw new multipartexception("异常",e); 
    } 
  } 
 
}

进度实体类progress.java

package com.gpl.web.utils; 
public class progress { 
   private long bytesread; 
  private long contentlength; 
  private long items; 
  public long getbytesread() { 
    return bytesread; 
  } 
  public void setbytesread(long bytesread) { 
    this.bytesread = bytesread; 
  } 
  public long getcontentlength() { 
    return contentlength; 
  } 
  public void setcontentlength(long contentlength) { 
    this.contentlength = contentlength; 
  } 
  public long getitems() { 
    return items; 
  } 
  public void setitems(long items) { 
    this.items = items; 
  } 
  @override 
  public string tostring() { 
    return "progress [bytesread=" + bytesread + ", contentlength=" + contentlength + ", items=" + items + "]"; 
  } 
   
   
}

spring配置文件需加入如下bean

<!-- 文件上传 --> 
  <bean id="multipartresolver" class="com.gpl.web.listener.custommultipartresolver"> 
    <property name="defaultencoding" value="utf-8"></property> 
    <property name="maxuploadsize" value="838860800"></property> 
  </bean>

controller层实现

/** 
   * 文件上传 
   * @param request 
   * @param response 
   * @param file 
   * @throws ioexception 
   */ 
  @requestmapping(value = "/upload", method = requestmethod.post) 
  public void upload(httpservletrequest request,httpservletresponse response,@requestparam("file") commonsmultipartfile file) 
      { 
    try{ 
      printwriter out; 
      boolean flag = false; 
      if(file.getsize() > 0){ 
        string path = "/asserts/upload/files/excel/"; 
        string uploadpath = request.getsession().getservletcontext().getrealpath(path); 
        system.out.println(uploadpath); 
        fileutils.copyinputstreamtofile(file.getinputstream(), new file(uploadpath,file.getoriginalfilename())); 
        flag = true; 
      } 
      out = response.getwriter(); 
      if(flag == true){ 
        out.print("1"); 
      }else{ 
        out.print("2"); 
      } 
    }catch(exception e){ 
      e.printstacktrace(); 
    } 
     
  }

前端代码

<div id="uploadfiledlg" class="easyui-dialog" style="width:800px;text-align:center;" 
      closed="true"> 
      <form id="uploadfileform" method="post" style="width:100%;text-align:center;padding:20px 0;"> 
        <input id="file" type="file" style="width:500px;display:inline-block;"> 
        <button id="uploadbtn" class="easyui-linkbutton" style="width:auto;display:inline-block;">上传</button>  
      </form> 
      <div class="progress progress-bar-striped active" style="display:none;"> 
        <div id="progressbar" class="progress-bar progress-bar-info" role="progressbar" 
        aria-valuenow="0" aria-valuemin="0" aria-valuemax="100" 
        style="width:0%;"> 
        </div> 
      </div> 
      <table id="uploadbatchdg"></table> 
    </div>

页面ready加入的js代码

$("#uploadbtn").attr("disabled",false); 
    $("#uploadbtn").click(function(){ 
      var filevalue = $("#file").val(); 
      if(filevalue == null || filevalue == ""){ 
        layer.msg("请先选择文件"); 
        return; 
      } 
      var obj = $("#file"); 
      var photoext=obj.val().substr(obj.val().lastindexof(".")).tolowercase();//获得文件后缀名 
      if(photoext!=".xls" && photoext!=".xlsx"){ 
        layer.msg("请选择xls或是xlsx格式的文件，不支持其他格式文件"); 
        return false; 
      } 
      var filesize = 0; 
      var isie = /msie/i.test(navigator.useragent) && !window.opera;    
      if (isie && !obj.files) {    
        var filepath = obj.val();    
        var filesystem = new activexobject("scripting.filesystemobject");  
        var file = filesystem.getfile (filepath);     
        filesize = file.size;    
      }else {  
        filesize = obj.get(0).files[0].size;   
      }  
      filesize=math.round(filesize/1024*100)/100; //单位为kb 
      if(filesize > 5000){ 
        layer.msg("文件不能大于5m"); 
        return false; 
      } 
      $("#progressbar").width("0%"); 
      $(this).attr("disabled",true); 
      $("#progressbar").parent().show(); 
      $("#progressbar").parent().addclass("active"); 
      uploadfile();

上传文件js代码

function uploadfile() { 
      var fileobj = $("#file").get(0).files[0]; // js 获取文件对象 
      console.info("上传的文件："+fileobj); 
      var filecontroller = "${basepath}/batch/upload"; // 接收上传文件的后台地址  
      // formdata 对象 
      var form = new formdata(); 
      // form.append("author", "hooyes"); // 可以增加表单数据 
      form.append("file", fileobj); // 文件对象 
      // xmlhttprequest 对象 
      var xhr = new xmlhttprequest(); 
      xhr.open("post", filecontroller, true); 
      xhr.onload = function() { 
        layer.msg("上传完成"); 
        $("#uploadbtn").attr('disabled', false); 
        $("#uploadbtn").val("上传"); 
        $("#progressbar").parent().removeclass("active"); 
        $("#progressbar").parent().hide(); 
      }; 
      xhr.upload.addeventlistener("progress", progressfunction, false); 
      xhr.send(form); 
    } 
    
    function progressfunction(evt) { 
      var progressbar = $("#progressbar"); 
      if (evt.lengthcomputable) { 
        var completepercent = math.round(evt.loaded / evt.total * 100)+ "%"; 
        progressbar.width(completepercent); 
        $("#uploadbtn").val("正在上传 " + completepercent); 
      } 
    };

效果图