JWT生成Token

使用JWT核心代码：
引入所需jar
maven -----------------------------
<dependency>
            <groupId>com.auth0</groupId>
            <artifactId>java-jwt</artifactId>
            <version>3.2.0</version>
        </dependency>
        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt</artifactId>
            <version>0.7.0</version>
        </dependency>


gradle-----------------------------------------


//jwt
  compile('com.auth0:java-jwt:3.2.0')
  compile('io.jsonwebtoken:jjwt:0.7.0')


新建一个类登录的
package com.zys.Jwt;

public class LoginUser {
private Integer id;
private String userName;
private boolean isLogin;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public boolean isLogin() {
return isLogin;
}
public void setLogin(boolean isLogin) {
this.isLogin = isLogin;
}


}


新建立
package com.zys.Jwt;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.lang3.time.DateUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTCreator;
import com.auth0.jwt.JWTVerifier;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.interfaces.Claim;
import com.auth0.jwt.interfaces.DecodedJWT;

public class JwtTokenUtil {
  public static final String ISSUER = "test_user";
  public static final Logger logger = LoggerFactory.getLogger(JwtTokenUtil.class);
/**
     * 生成登陆token
     *
     * @param LoginUser
     * @return
     */
    public static String createLoginToken(LoginUser LoginUser) {
        try {
            Algorithm algorithm = Algorithm.HMAC256(LoginInfoConstants.TOKEN_SECURITY);
            JWTCreator.Builder builder = JWT.create()
                    .withIssuer(ISSUER)
                     //设置过期时间为3个月
                    .withExpiresAt(DateUtils.addMonths(new Date(), 3));
            if(LoginUser != null){
                builder.withClaim(LoginInfoConstants.USER_ID, LoginUser.getId());
                builder.withClaim(LoginInfoConstants.USER_NAME, LoginUser.getUserName());
                builder.withClaim(LoginInfoConstants.IS_LOGIN, true);
            }
            return builder.sign(algorithm);
        } catch (Exception e) {
            logger.error("生成token失败,失败原因:{}", e);
        }
        return null;
    }
   
    /**
     * 验证jwt，并返回数据LoginUser
     */
    public static LoginUser verifyLoginToken(String token) {
        Algorithm algorithm;
        Map<String, Claim> map = new HashMap<String, Claim>();
        LoginUser loginUser = new LoginUser();
        try {
            algorithm = Algorithm.HMAC256(LoginInfoConstants.TOKEN_SECURITY);
            JWTVerifier verifier = JWT.require(algorithm).withIssuer(ISSUER).build();
            DecodedJWT jwt = verifier.verify(token);
            map = jwt.getClaims(loginUser.getId());
           if(map.get(LoginInfoConstants.USER_ID) != null) {
            loginUser.setId(map.get(LoginInfoConstants.USER_ID).asInt());
            }
          
            if(map.get(LoginInfoConstants.USER_NAME) != null) {
            loginUser.setUserName(map.get(LoginInfoConstants.USER_NAME).asString());
            }
            loginUser.setLogin(map.get(LoginInfoConstants.IS_LOGIN).asBoolean());
        } catch (Exception e) {
        loginUser = null;
            logger.error("解密token失败:{}", e);
        }
        return loginUser;
    }
   
   
    public static void main(String[] args) {
    LoginUser loginUser = new LoginUser();
    loginUser.setId(123456);
    loginUser.setUserName("张三");
        String token = createLoginToken(loginUser);
        System.out.println("================="+token);
        String token1=token;
        LoginUser loginUserResult = JwtTokenUtil.verifyLoginToken(token1);
        System.out.println(loginUserResult.getId());
        System.out.println(loginUserResult.getUserName());
        System.out.println(loginUserResult.isLogin());
    }
}



系统常量

package com.zys.Jwt;

public class LoginInfoConstants {
/**用户id*/
    public static final String USER_ID = "id";

    /**
     * 用户名
     */
    public static final String USER_NAME = "userName";

    /**
     * 是否登陆
     */
    public static final String IS_LOGIN = "isLogin";

    /**
     * token 名称
     */
    public static final String TOKEN_NAME = "authorization";
   
    /**
     * jwt 加密串
     */
    public final static String TOKEN_SECURITY = "token.security";

   
}


















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