JWT简单使用

原创已于 2023-05-20 10:20:59 修改 · 296 阅读

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#java

于 2023-03-25 15:42:29 首次发布

导入依赖

<dependency>
    <groupId>io.jsonwebtoken</groupId>
    <artifactId>jjwt</artifactId>
    <version>0.9.1</version>
</dependency>

JWTUtils.java

public class JWTUtils {
    //七天过期
    private static final long expire = 1000 * 86400;
    //32位密钥
    private static final String secret = "sjidamskzixjcyfbeksoaldoskxisjab";
    //生成token
    public static String generateToken(String username){
        Date now = new Date();
        Date expireDate = new Date(now.getTime() + expire);
        return Jwts.builder()
                .setHeaderParam("type", "JWT")
                .setSubject(username)
                .setIssuedAt(now)
                .setExpiration(expireDate)
                .signWith(SignatureAlgorithm.HS512, secret)
                .compact();
    }
    //解析token
    public static Claims getClaimsByToken(String token){
        return Jwts.parser()
                .setSigningKey(secret)
                .parseClaimsJws(token)
                .getBody();
    }
}

controller

	@PostMapping("/login")
    public Result login(@RequestBody User user){
        String token = JWTUtils.generateToken(user.getUsername());
        return new Result().success().add("token", token);
    }

    @GetMapping("/info") //传token
    public Result info(String token){
        Claims claimsByToken = JWTUtils.getClaimsByToken(token);
        String username = claimsByToken.getSubject();
        return new Result().success().add("username", username);
    }