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java通过拦截器判断当前访问的设备是否是移动设备

程序员文章站 2022-06-11 13:26:51
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拦截器从请求中提取信息判断访问的设备是否是手机。

一.拦截器配置

 <!-- 跳转手机 --> 
	   <mvc:interceptor>  
		   <!-- 需拦截的地址   -->
		   <!-- 一级目录  --> 
		   <mvc:mapping path="/*" />
		   <mvc:mapping path="/*mobile*/*" />
		  <!--  需排除拦截的地址   -->
		  <mvc:exclude-mapping path="/candidateUser/login"/> 
		  <mvc:exclude-mapping path="/candidateUser/register"/>
		  <mvc:exclude-mapping path="/candidateUser/loginData"/>
		  <mvc:exclude-mapping path="/candidateUser/registerData"/>
		  <mvc:exclude-mapping path="/invite/*"/>
		  <mvc:exclude-mapping path="/candidateUser/*"/>
		  <mvc:exclude-mapping path="/inviteUser/*"/>
		  <mvc:exclude-mapping path="/*Message*/*"/>
		  <mvc:exclude-mapping path="/*Message*"/>
		  <mvc:exclude-mapping path="/adminLogin"/>
		  <mvc:exclude-mapping path="/adminLogining"/>
		  <mvc:exclude-mapping path="/*mobile*"/>
		  <mvc:exclude-mapping path="/*mobile*/*"/>
		  <bean class="com.calaisweb.framework.base.interceptor.MobileInter" />  
	  </mvc:interceptor>
	  

二.拦截器代码

package com.calaisweb.framework.base.interceptor;

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

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import com.calaisweb.framework.tool.UrlUtil;
import com.calaisweb.framework.tool.mobile.DeviceUtils;

public class MobileInter  implements HandlerInterceptor {

	@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
			throws Exception {
		 Boolean retBoolean=true;
		 Boolean isMobileDevice;
		 isMobileDevice=DeviceUtils.check(request,response);
		 if(isMobileDevice) {
			 String basePath = request.getScheme()+"://"+request.getServerName()+":"+ request.getServerPort()+"/calaisweb/";
			 response.sendRedirect(basePath+"/mobile/index");
			 retBoolean=false;
		 }
		 UrlUtil.getUrlInfo(request);
		return retBoolean;		
		
		 /*Boolean retBoolean=true;
		 Boolean isMobileDevice;
		 isMobileDevice=DeviceUtils.check(request,response);
		 if(isMobileDevice) {
			 String basePath = request.getScheme()+"://"+request.getServerName()+":"+ request.getServerPort()+"/calaisweb/";
			 String urlp=request.getRequestURI();
			 urlp.replaceAll("//","/");
			 String[] urlPathArr=urlp.split("/");
			 if(urlPathArr[2].equals("index")) {
				 response.sendRedirect(basePath+"/mobile/index");
			 }else if(urlPathArr.length==3) {
				 response.sendRedirect(basePath+urlPathArr[2]+"mobile");
			 }else if(urlPathArr.length==4){
				 response.sendRedirect(basePath+urlPathArr[2]+"Mobile/"+urlPathArr[3]);
			 }
			 retBoolean=false;
		 }
		 UrlUtil.getUrlInfo(request);
		return retBoolean;*/
	}

	@Override
	public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
			ModelAndView modelAndView) throws Exception {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
			throws Exception {
		// TODO Auto-generated method stub
		
	}

}

   三.具体判断的工具类

package com.calaisweb.framework.tool.mobile;

import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

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

/**
 * 判断访问设备为PC或者手机--工具类
 */
public class DeviceUtils {
    // \b 是单词边界(连着的两个(字母字符 与 非字母字符) 之间的逻辑上的间隔),    
    // 字符串在编译时会被转码一次,所以是 "\\b"    
    // \B 是单词内部逻辑间隔(连着的两个字母字符之间的逻辑上的间隔)    
    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";    
      
    //移动设备正则匹配:手机端、平板  
    static Pattern phonePat = Pattern.compile(phoneReg, Pattern.CASE_INSENSITIVE);    
    static Pattern tablePat = Pattern.compile(tableReg, Pattern.CASE_INSENSITIVE);    
        
    /** 
     * 检测是否是移动设备访问 
     */  
    public static boolean check(String userAgent){    
        if(null == userAgent){    
            userAgent = "";    
        }    
        // 匹配    
        Matcher matcherPhone = phonePat.matcher(userAgent);    
        Matcher matcherTable = tablePat.matcher(userAgent);    
        if(matcherPhone.find() || matcherTable.find()){    
            return true;    
        } else {    
            return false;    
        }    
    }  



/** 
 * 检查访问方式是否为移动端 
 *   
 */  
public static boolean check(HttpServletRequest request,HttpServletResponse response) throws IOException{  
    boolean isFromMobile=false;  
      
    HttpSession session= request.getSession();  
   //检查是否已经记录访问方式(移动端或pc端)  
    session.removeAttribute("ua");
    if(null==session.getAttribute("ua")){  
        try{  
            //获取ua,用来判断是否为移动端访问  
            String userAgent = request.getHeader( "USER-AGENT" ).toLowerCase();    
            if(null == userAgent){    
                userAgent = "";    
            }  
            isFromMobile=DeviceUtils.check(userAgent);  
            //判断是否为移动端访问  
            if(isFromMobile){  
                System.out.println("移动端访问");  
                session.setAttribute("ua","mobile");  
            } else {  
                System.out.println("pc端访问");  
                session.setAttribute("ua","pc");  
            }  
        }catch(Exception e){}  
    }else{  
        isFromMobile=session.getAttribute("ua").equals("mobile");  
    }  
      
    return isFromMobile;  
}  
}