JWT(json web token)

token由head头部,payLoad消息体，signature签名

 

maven导入

<!-- https://mvnrepository.com/artifact/io.jsonwebtoken/jjwt -->
		<dependency>
			<groupId>io.jsonwebtoken</groupId>
			<artifactId>jjwt</artifactId>
			<version>0.7.0</version>
		</dependency>

创建token

import io.jsonwebtoken.JwtBuilder;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;

import java.util.Date;

public class CreateJWT {
    public static void main(String[] args) {
        String priKey="dajitui123";
        JwtBuilder builder= Jwts.builder().setId("123").setSubject("jwt测试").setIssuedAt(new Date())
                .signWith(SignatureAlgorithm.HS256,priKey);
        String s=builder.compact();
        System.out.println(s);
        //eyJhbGciOiJIUzI1NiJ9.eyJqdGkiOiIxMjMiLCJzdWIiOiJqd3TmtYvor5UiLCJpYXQiOjE1NDQ4Njc2MzB9.KYZvcS3dhIjOfkfRjzv5kbVgDbriCIDoll6y2ZVBvRQ
    }
}

 

解密信息

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureException;

public class ParseJWT {
    public static void main(String[] args) {
        String pubKey="dajitui123";
        String token="eyJhbGciOiJIUzI1NiJ9.eyJqdGkiOiIxMjMiLCJzdWIiOiJqd3TmtYvor5UiLCJpYXQiOjE1NDQ4NjkxMTF9.uIQ4o7N9x5JGmUVg8RcJlwqS3IXBjfRh-V_n61FBwW0";
        try {
            Claims claims= Jwts.parser().setSigningKey(pubKey).parseClaimsJws(token).getBody();
            System.out.println("id"+claims.getId());
            System.out.println("subject"+claims.getSubject());
            System.out.println("issuedAt"+claims.getIssuedAt());
        }catch (SignatureException e){
            System.out.println("**错误");
        }

    }
}