
com.alan344happyframework.util.JwtUtils Maven / Gradle / Ivy
package com.alan344happyframework.util;
import io.jsonwebtoken.*;
import lombok.Getter;
import lombok.Setter;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.time.Instant;
import java.util.Base64;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
/**
* @author alan
* @date 18-7-12 下午4:51 * jwo
*/
public class JwtUtils {
private static SecretKey generalKey() {
byte[] encodedKey = Base64.getEncoder().encode(Constant.JWT_SECRET.getBytes());
return new SecretKeySpec(encodedKey, 0, encodedKey.length, "AES");
}
/**
* 生成token
*
* @param id 一般传入userId
* @param claimsMap 用户信息
* @return token
*/
public static String createJWT(String id, String subject, Map claimsMap) {
return createJWT(id, subject, Constant.JWT_TTL, claimsMap);
}
/**
* 签发JWT
*
* @param id id
* @param subject 主体 用户信息
* @param ttlMillis 过期时间 (单位毫秒)
* @param claimsMap 用户信息
* @return token
*/
public static String createJWT(String id, String subject, long ttlMillis, Map claimsMap) {
long nowMillis = System.currentTimeMillis();
Date now = new Date(nowMillis);
JwtBuilder builder = Jwts.builder()
.setId(id)
.setIssuer(Constant.ISS)
.setSubject(subject)
.setClaims(claimsMap)
.setIssuedAt(now)
.signWith(SignatureAlgorithm.HS512, generalKey());
if (ttlMillis >= 0) {
builder.setExpiration(new Date(nowMillis + ttlMillis));
}
return builder.compact();
}
/**
* 验证JWT
*
* @param jwtStr 待校验token
* @return {@link CheckResult}
*/
public static CheckResult validateJWT(String jwtStr) {
CheckResult checkResult = new CheckResult();
Claims claims;
try {
claims = parseJWT(jwtStr);
checkResult.setSuccess(true);
checkResult.setClaims(claims);
} catch (ExpiredJwtException e) {
checkResult.setErrCode(Constant.JWT_ERRCODE_EXPIRE);
checkResult.setSuccess(false);
} catch (Exception e) {
checkResult.setErrCode(Constant.JWT_ERRCODE_FAIL);
checkResult.setSuccess(false);
}
return checkResult;
}
/**
* 解析JWT字符串
*
* @param jwt 待解析字符串
* @return {@link Claims}
* @throws Exception e
*/
private static Claims parseJWT(String jwt) throws Exception {
SecretKey secretKey = generalKey();
return Jwts.parser()
.setSigningKey(secretKey)
.parseClaimsJws(jwt)
.getBody();
}
public static void main(String[] args) {
Map stringObjectMap = new HashMap<>();
stringObjectMap.put("userId", 96);
stringObjectMap.put("createTime", Instant.now().toEpochMilli());
String jwt = createJWT("1", "user", stringObjectMap);
String token = "eyJhbGciOiJIUzUxMiJ9.eyJleHAiOjE1NDQ0NjI1MzMsInVzZXJJZCI6OTIsImNyZWF0ZVRpbWUiOjE1NDMzNjg1MzM0MjAsImlhdCI6MTU0MzM2ODUyOH0.ik530jMBb-rkX_5Iq1qobkcCaeWqsVp8MXfpgQghsEdJOUl-RzuEpwpxsvg6yeaVWwG9OpcMTvKWkercNw1XfQ";
CheckResult checkResult = validateJWT(token);
Claims claims = checkResult.getClaims();
String id = claims.getId();
}
private static class Constant {
/**
* jwt
*/
private static final String JWT_ID = "jwt";
private static final String ISS = "com.alan344happyframework";
private static final String JWT_SECRET = "www.alan344happyframework.com";
private static final long JWT_TTL = 36500 * 24 * 60 * 60000L; //millisecond
private static final int JWT_REFRESH_INTERVAL = 55 * 60 * 1000; //millisecond
private static final int JWT_REFRESH_TTL = 7 * 24 * 60 * 60 * 1000; //millisecond
private static final int JWT_ERRCODE_EXPIRE = 1;
private static final int JWT_ERRCODE_FAIL = 2;
}
@Getter
@Setter
public static class CheckResult {
private boolean success;
private int errCode;
private Claims claims;
}
}
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