EXTJS配合Struts2的图片上传(可预览)
   3. import javax.servlet.http.HttpServletRequest; 
   4. import javax.servlet.http.HttpServletResponse; 
   5.  
   6. import org.apache.struts2.interceptor.ServletRequestAware; 
   7. import org.apache.struts2.interceptor.ServletResponseAware; 
   8.  
   9. import cn.com.ajaxbear.vo.Account; 
  10.  
  11. import com.opensymphony.xwork2.ActionSupport; 
  12.  
  13. public class BaseAction extends ActionSupport implements ServletRequestAware, 
  14.         ServletResponseAware { 
  15.     private static final long serialVersionUID = -1513311332990213727L; 
  16.      
  17.     protected HttpServletResponse response; 
  18.  
  19.     protected HttpServletRequest request; 
  20.      
  21.     public void setServletRequest(HttpServletRequest request) { 
  22.         this.request = request; 
  23.     } 
  24.  
  25.     public void setServletResponse(HttpServletResponse response) { 
  26.         this.response = response; 
  27.     } 
  28.      
  29.     protected Account getUser(HttpServletRequest request){ 
  30.         return (Account)request.getSession().getAttribute("user"); 
  31.     } 
  32.      
  33.     protected void setUser(HttpServletRequest request, Account account){ 
  34.         request.getSession().setAttribute("user", account); 
  35.     } 
  36.      
  37.     protected void destroyUser(HttpServletRequest request){ 
  38.         request.getSession().removeAttribute("user"); 
  39.     } 
  40.  
  41. } 

package cn.com.ajaxbear.action;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.interceptor.ServletRequestAwarutStream; 
   5. import java.io.FileOutputStream; 
   6. import java.util.UUID; 
   7.  
   8. import org.apache.struts2.ServletActionContext; 
   9.  
  10. import cn.com.ajaxbear.util.XResponse; 
  11.  
  12. public class UploadAction extends BaseAction { 
  13.  
  14.     private File upload; 
  15.     private String uploadContentType; 
  16.     public File getUpload() { 
  17.         return upload; 
  18.     } 
  19.  
  20.     public void setUpload(File upload) { 
  21.