JQuery、ajaxFileUpload、Struts2和注解异步上传文件

本文主要是介绍JQuery、ajaxFileUpload、Struts2和注解异步上传文件，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

最近，公司要求做的一个项目涉及到文件上传，因为页面同时有四个上传按钮，要求是无页面刷新，所以想到了用Jquery的Ajax进行上传，但是由于本人没查到JQuery的文件上传组件，因此就去网上搜索，找到了一个很好的组件ajaxFileUpload，利用此组件成功实现了异步文件上传！

  第一步：需要导入jquery-1.7.2.min.js、ajaxfileupload.js两个文件，在jsp页面引入的顺序必须是jquery-1.7.2.min.js在先，ajaxfileupload.js在后，因为ajaxfileupload.js依赖与jquery包，所以你懂得！ 
   jsp页面代码： 
 <!-- lang: html --> 
 < button  id = "uploadSubmit"  type = "submit"  class = "btn btn-sm btn-info col-md-1 col-md-offset-1"  onclick = "FileUpload('uploadSubmit');" > 
                      < span  class = "glyphicon glyphicon-upload" ></ span >Upload 
                  </ button > 
 js代码： 
 <!-- lang: js --> 
 function FileUpload(buttonId) { 
 $.ajaxFileUpload({ 
      url : 'fileUpload!upload',// 用于文件上传的服务器端请求地址 
      type : "post", 
      dataType : "json", 
      timeout : 1000, 
      secureuri : false,// 一般设置为false 
      fileElementId : uploadId,// 文件上传空间的id属性 < input  type = "file"  id = "uploadId"  /> 
      error : function(XMLHttpRequest, textStatus, errorThrown) { 
      }, 
      success : function(data) { 
      } 
 }); 
 

}

 ? 
 <!-- lang: java --> 
 package  cn.caculate.web.action; 
 import  java.io.BufferedInputStream; 
 import  java.io.BufferedOutputStream; 
 import  java.io.File; 
 import  java.io.FileInputStream; 
 import  java.io.FileOutputStream; 
 import  java.io.InputStream; 
 import  java.io.OutputStream; 
 import  org.apache.struts2.ServletActionContext; 
 import  org.apache.struts2.convention.annotation.Action; 
 import  org.apache.struts2.convention.annotation.InterceptorRef; 
 import  org.apache.struts2.convention.annotation.InterceptorRefs; 
 import  org.apache.struts2.convention.annotation.Result; 
 import  org.apache.struts2.convention.annotation.Results; 
 import  org.springframework.beans.factory.annotation.Autowired; 
 import  cn.caculate.service.upload.IFileUploadService; 
 import  com.opensymphony.xwork2.ActionSupport; 
 @Action ( "fileUpload" ) 
 @InterceptorRefs (value = {  @InterceptorRef ( "fileUploadStack" ) }) 
 @Results ({  @Result (name =  "jsonType" , type =  "json" ) }) 
 public  class  CopyOfFileUploadAction  extends  ActionSupport { 
 private  static  final  long  serialVersionUID = 1L; 
 private  static  final  int  BUFFER_SIZE =  16  *  1024 ; 
 /** 
   * 需要上传的文件 
   */ 
 private  File upload; 
 /** 
   * 上传文件的类型 
   */ 
 private  String uploadContentType; 
 /** 
   * 文件名 
   */ 
 private  String uploadFileName; 
 /** 
   * 上传之后的文件名 
   */ 
 private  String storageFileName; 
 /** 
   * 文件上传的路径 
   */ 
 public  String path = ServletActionContext.getServletContext().getRealPath( 
          File.separator +  "WEB-INF"  + File.separator +  "file" ); 
 /** 
   * 新文件上传 
   *  
   * @return 
   */ 
 public  String upload() { 
      try  { 
          // 将Struts2自动封装的文件名赋给要写入的文件 
          storageFileName = uploadFileName; 
          // 创建要写入的文件 
          File storageFile =  new  File(path +  "//"  + storageFileName); 
          copy(upload, storageFile); 
          return  "jsonType" ; 
      }  catch  (Exception e) { 
          e.printStackTrace(); 
      } 
      return  null ; 
 } 
 /** 
   * 上传文件的主要方法 
   *  
   * @param src 
   * @param dst 
   * @return 
   */ 
 public  boolean  copy(File src, File dst) { 
      try  { 
          InputStream in =  null ; 
          OutputStream out =  null ; 
          try  { 
              in =  new  BufferedInputStream( new  FileInputStream(src), 
                      BUFFER_SIZE); 
              out =  new  BufferedOutputStream( new  FileOutputStream(dst), 
                      BUFFER_SIZE); 
              byte [] buffer =  new  byte [BUFFER_SIZE]; 
              while  (in.read(buffer) >  0 ) { 
                  out.write(buffer); 
              } 
          }  finally  { 
              if  ( null  != in) { 
                  in.close(); 
              } 
              if  ( null  != out) { 
                  out.close(); 
              } 
          } 
      }  catch  (Exception e) { 
          e.printStackTrace(); 
      } 
      return  true ; 
 } 
 public  File getUpload() { 
      return  upload; 
 } 
 public  void  setUpload(File upload) { 
      this .upload = upload; 
 } 
 public  String getUploadContentType() { 
      return  uploadContentType; 
 } 
 public  void  setUploadContentType(String uploadContentType) { 
      this .uploadContentType = uploadContentType; 
 } 
 public  String getUploadFileName() { 
      return  uploadFileName; 
 } 
 public  void  setUploadFileName(String uploadFileName) { 
      this .uploadFileName = uploadFileName; 
 } 
 public  String getStorageFileName() { 
      return  storageFileName; 
 } 
 public  void  setStorageFileName(String storageFileName) { 
      this .storageFileName = storageFileName; 
 } 
 public  String getPath() { 
      return  path; 
 } 
 public  void  setPath(String path) { 
      this .path = path; 
 } 