JwtUtils token生成器

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import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTVerifier;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.interfaces.Claim;
import com.auth0.jwt.interfaces.DecodedJWT;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import lombok.Data;

public class JwtUtils {

    /**
     * 密钥
     */
    private static final String SECRET = "123456";
    /**
     * 过期时间:秒
     */
    private static final int EXPIRE = 3600;
    private static String clientId = "clientId";

    /**
     * 生成Token
     * @param tokenSource
     * @param expire
     * @return String
     * @throws Exception
     */
    public static <T> String createToken(T tokenSource, int expire) throws Exception {
        Map<String, Object> map = new HashMap<>();
        map.put("clientId", clientId);
        String userInfo = JacksonUtils.obj2Str(tokenSource).isPresent()?JacksonUtils.obj2Str(tokenSource).get():null;
        String token = "";
        try {
            token = JWT.create()
                .withHeader(map)//头
                .withClaim("userInfo", userInfo)
                .withIssuedAt(new Date())//签名时间
                .withExpiresAt(expireDate(expire))//过期时间
                .sign(Algorithm.HMAC256(SECRET));//签名
        }catch (Exception e){
            throw new Exception("生成Token失败");
        }
        return token;
    }

    private static Date expireDate(int expire){
        Calendar nowTime = Calendar.getInstance();
        if (expire > 0){
            nowTime.add(Calendar.SECOND, expire);
        }else {
            nowTime.add(Calendar.SECOND, EXPIRE);
        }
        return nowTime.getTime();
    }

    /**
     * 验证Token
     * @param token
     * @return
     * @throws Exception
     */
    public static Map<String, Claim> verifyToken(String token)throws Exception{
        JWTVerifier verifier = JWT.require(Algorithm.HMAC256(SECRET)).build();
        DecodedJWT jwt = null;
        try {
            jwt = verifier.verify(token);
        }catch (Exception e){
            throw new Exception("凭证已过期，请重新登录");
        }
        return jwt.getClaims();
    }

    /**
     * 解析Token
     * @param token
     * @return
     */
    public static Map<String, Claim> parseToken(String token){
        DecodedJWT decodedJWT = JWT.decode(token);
        return decodedJWT.getClaims();
    }




    //测试
    public static void main(String[] args){
        try {
            User request = new User();
            request.setUserId("123456");
            request.setUserName("asdf");
            String token = JwtUtils.createToken(request,0);
            System.out.println("token=" + token);
            Map<String, Claim> map = JwtUtils.verifyToken(token);
            for (Map.Entry<String, Claim> entry : map.entrySet()) {
                if (entry.getValue().asString() != null) {
                    System.out.println(entry.getKey() + "=" + entry.getValue().asString());
                } else {
                    System.out.println(entry.getKey() + "=" + entry.getValue().asDate());
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    @Data
    static class User {
        private String userId;
        private String userName;

    }
}

导包

<dependency>
	<groupId>com.auth0</groupId>
	<artifactId>java-jwt</artifactId>
	<version>3.9.0</version>
</dependency>

 

来源：oschina

链接：https://my.oschina.net/lion1220/blog/3154503