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

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！

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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) {        }   });

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<!-- 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; }

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