java區分訪問端來源

java區分訪問端來源

package com.actions;
import java.util.regex.Matcher; 
import java.util.regex.Pattern;
import java.io.IOException; 
import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpSession;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionContext;


public class CheckMobile {  
   
   static String phoneReg = "\\b(ip(hone|od)|android|opera m(ob|in)i"    
            +"|windows (phone|ce)|blackberry"    
           +"|s(ymbian|eries60|amsung)|p(laybook|alm|rofile/midp"    
            +"|laystation portable)|nokia|fennec|htc[-_]"    
            +"|mobile|up.browser|[1-4][0-9]{2}x[1-4][0-9]{2})\\b";    
    static String tableReg = "\\b(ipad|tablet|(Nexus 7)|up.browser"    
           +"|[1-4][0-9]{2}x[1-4][0-9]{2})\\b";    
     
 
    static Pattern phonePat = Pattern.compile(phoneReg, Pattern.CASE_INSENSITIVE);    
    static Pattern tablePat = Pattern.compile(tableReg, Pattern.CASE_INSENSITIVE);    
  
    public static boolean check(String userAgent){    
        if(null == userAgent){    
            userAgent = "";    
        }    
       
        Matcher matcherPhone = phonePat.matcher(userAgent);    
        Matcher matcherTable = tablePat.matcher(userAgent);    
       if(matcherPhone.find() || matcherTable.find()){    
           return true;    
        } else {    
            return false;    
       }    
    }  
 

   public String checkaa() throws IOException{  
	   
    boolean isFromMobile=false;  
    ActionContext actx = ActionContext.getContext();
	HttpServletRequest request = (HttpServletRequest) actx.get(ServletActionContext.HTTP_REQUEST);
   HttpSession session= request.getSession();  
           String userAgent = request.getHeader( "USER-AGENT" ).toLowerCase();    
            if( userAgent ==null){    
               userAgent = "";    
            }  
           isFromMobile=CheckMobile.check(userAgent);  
           
            if(isFromMobile){  
            	return "test1";
               //System.out.println("移動端訪問");  
               // session.setAttribute("ua","mobile");  
            } else {  
            	return "test2";
               // System.out.println("pc端訪問");  
               // session.setAttribute("ua","pc");  
        
	   
	   
   }
   }
   
}