springMVC 拦截器

配置

 <mvc:interceptors>         <mvc:interceptor>        <!--     拦截路径 -->            <mvc:mapping path="/**/*.zt"/>        <!--     拦截类 -->            <bean class="com.szzt.yinyiApp.interceptor.TokenInterceptor"/>         </mvc:interceptor>         <mvc:interceptor>         <!--    拦截路径 -->            <mvc:mapping path="/**/*.zt"/>         <!--    拦截类 -->             <bean class="com.szzt.yinyiApp.interceptor.UserInterceptor"/>         </mvc:interceptor>      </mvc:interceptors>

实现类

TokenInterceptor.java

package com.szzt.yinyiApp.interceptor;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.log4j.Logger;import org.springframework.web.servlet.HandlerInterceptor;import org.springframework.web.servlet.ModelAndView;import com.auth0.jwt.JWT;import com.auth0.jwt.JWTVerifier;import com.auth0.jwt.algorithms.Algorithm;import com.auth0.jwt.exceptions.SignatureVerificationException;import com.auth0.jwt.exceptions.TokenExpiredException;import com.szzt.yinyiApp.bean.Constant;public class TokenInterceptor implements  HandlerInterceptor {    private Logger logger = Logger.getLogger(TokenInterceptor.class);    public void afterCompletion(HttpServletRequest arg0,            HttpServletResponse arg1, Object arg2, Exception arg3)            throws Exception {        //完成拦截    }    public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1,            Object arg2, ModelAndView arg3) throws Exception {        //返回拦截    }    public boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1,            Object handler) throws Exception {        String token = arg0.getHeader("token");         logger.info("token"+token);    try{        //验证token 取出身份标识         JWTVerifier verifier = JWT.require(Algorithm.HMAC256(Constant.COMM_TOKEN_KEY))                      .build();                   verifier.verify(token);                return true;    }catch (TokenExpiredException e){        System.out.println("token过期");    }catch (SignatureVerificationException e){        System.out.println("验证失败");    }catch (Exception e){        System.out.println("验证失败");    }    String re = "{\"statusCode\":\""+Constant.COMM_TOKEN_ERRER+"\",\"message\":\"token验证失败\",\"data\":null}";    arg1.getWriter().write(re);    return false;    }}

UserInterceptor.java

package com.szzt.yinyiApp.interceptor;import java.util.Map;import org.springframework.ui.ModelMap;import org.springframework.web.context.request.WebRequest;import org.springframework.web.context.request.WebRequestInterceptor;import com.auth0.jwt.JWT;import com.auth0.jwt.JWTVerifier;import com.auth0.jwt.algorithms.Algorithm;import com.auth0.jwt.exceptions.SignatureVerificationException;import com.auth0.jwt.exceptions.TokenExpiredException;import com.auth0.jwt.interfaces.Claim;import com.auth0.jwt.interfaces.DecodedJWT;import com.szzt.yinyiApp.bean.Constant;public class UserInterceptor implements WebRequestInterceptor {    public void afterCompletion(WebRequest arg0, Exception arg1)            throws Exception {        // TODO Auto-generated method stub    }    public void postHandle(WebRequest arg0, ModelMap arg1) throws Exception {        // TODO Auto-generated method stub    }    public void preHandle(WebRequest arg0) throws Exception {        String token = arg0.getHeader("token");        try{            //验证token 取出身份标识             JWTVerifier verifier = JWT.require(Algorithm.HMAC256(Constant.COMM_TOKEN_KEY))                          .build();                DecodedJWT jwt = verifier.verify(token);              Map<String, Claim> claims = jwt.getClaims();             String phoneNo = claims.get("phoneNo").asString();            arg0.setAttribute("phoneNo",phoneNo,WebRequest.SCOPE_REQUEST);        }catch (TokenExpiredException e){            System.out.println("token过期");        }catch (SignatureVerificationException e){            System.out.println("验证失败");        }catch (Exception e){            System.out.println("验证失败");        }    }}