依赖导入
<dependency><groupId>io.jsonwebtoken</groupId><artifactId>jjwt</artifactId><version>0.9.1</version>
</dependency>
<!--非JDK17不用导入如下依赖-->
<dependency><groupId>io.jsonwebtoken</groupId><artifactId>jjwt-jackson</artifactId><version>0.11.5</version>
</dependency>
<dependency><groupId>commons-codec</groupId><artifactId>commons-codec</artifactId>
</dependency>
<dependency><groupId>javax.xml.bind</groupId><artifactId>jaxb-api</artifactId><version>2.3.0</version>
</dependency>
<dependency><groupId>com.sun.xml.bind</groupId><artifactId>jaxb-impl</artifactId><version>2.3.0</version>
</dependency>
<dependency><groupId>com.sun.xml.bind</groupId><artifactId>jaxb-core</artifactId><version>2.3.0</version>
</dependency>
<dependency><groupId>javax.activation</groupId><artifactId>activation</artifactId><version>1.1.1</version>
</dependency>
JWT工具类
package com.shuwei.dai;import io.jsonwebtoken.*;import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.util.*;public class AppJwtUtil {// TOKEN的有效期一天（S）private static final int TOKEN_TIME_OUT = 3_600;// 加密KEYprivate static final String TOKEN_ENCRY_KEY = "SMDk4ZjZiY2Q0NjIxZDM3M2NhZGU0ZTgzMjYyN2I0ZjY";// 最小刷新间隔(S)private static final int REFRESH_TIME = 300;// 生产IDpublic static String getToken(Long id) {Map<String, Object> claimMaps = new HashMap<>();claimMaps.put("id", id);long currentTime = System.currentTimeMillis();return Jwts.builder().setId(UUID.randomUUID().toString()).setIssuedAt(new Date(currentTime)) //签发时间.setSubject("system") //说明.setIssuer("heima") //签发者信息.setAudience("app") //接收用户.compressWith(CompressionCodecs.GZIP) //数据压缩方式.signWith(SignatureAlgorithm.HS512, generalKey()) //加密方式.setExpiration(new Date(currentTime + TOKEN_TIME_OUT * 1000)) //过期时间戳.addClaims(claimMaps) //cla信息.compact();}/*** 获取token中的claims信息** @param token* @return*/private static Jws<Claims> getJws(String token) {return Jwts.parser().setSigningKey(generalKey()).parseClaimsJws(token);}/*** 获取payload body信息** @param token* @return*/public static Claims getClaimsBody(String token) {try {return getJws(token).getBody();} catch (ExpiredJwtException e) {return null;}}/*** 获取hearder body信息** @param token* @return*/public static JwsHeader getHeaderBody(String token) {return getJws(token).getHeader();}/*** 是否过期** @param claims* @return -1：有效，0：有效，1：过期，2：过期*/public static int verifyToken(Claims claims) {if (claims == null) {return 1;}try {claims.getExpiration().before(new Date());// 需要自动刷新TOKENif ((claims.getExpiration().getTime() - System.currentTimeMillis()) > REFRESH_TIME * 1000) {return -1;} else {return 0;}} catch (ExpiredJwtException ex) {return 1;} catch (Exception e) {return 2;}}/*** 由字符串生成加密key** @return*/public static SecretKey generalKey() {byte[] encodedKey = Base64.getEncoder().encode(TOKEN_ENCRY_KEY.getBytes());SecretKey key = new SecretKeySpec(encodedKey, 0, encodedKey.length, "AES");return key;}public static void main(String[] args) {/* Map map = new HashMap();map.put("id","11");*/System.out.println(AppJwtUtil.getToken(1102L));Jws<Claims> jws = AppJwtUtil.getJws("eyJhbGciOiJIUzUxMiIsInppcCI6IkdaSVAifQ.H4sIAAAAAAAA_zWLSQrDMAwA_6JzDF7kJfmNgmXiQMAgB1pK_17l0NsMw3zgnB02wJrD2gobXFsyaFsx1Kw30VcX9siJU4AFOk3YXPYFrXM-LiD3rre8ZfL1dBHVg_tFanRXNRpDmV_jf2J-zq4tfn-EHnvSgAAAAA.JIjyu9IPQE3ABX3_6YUJHfaPXDBxzCYze2T5yF7nIvOuAZyFurTi_Ii441w_0e5luoGQacyMjdWVs8xpZ7koog");Claims claims = jws.getBody();System.out.println(claims.get("id"));}}
