一、创建Maven项目
1、项目
项目类型：Maven
groupId：com.atguigu
artifactId：jwt
2、基本依赖
<dependencies> <!-- JWT --> <dependency> <groupId>io.jsonwebtoken</groupId> <artifactId>jjwt</artifactId> <version>0.7.0</version> </dependency> <!--junit--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> </dependencies>
二、测试JWT
1、生成token
代码语言：javascript复制public class JwtTests {
//过期时间，毫秒，24小时
private static long tokenExpiration = 24*60*60*1000;
//秘钥
private static String tokenSignKey = "atguigu123";
@Test
public void testCreateToken(){
String token = Jwts.builder()
.setHeaderParam("typ", "JWT") //令牌类型
.setHeaderParam("alg", "HS256") //签名算法
.setSubject("guli-user") //令牌主题
.setIssuer("atguigu")//签发者
.setAudience("atguigu")//接收者
.setIssuedAt(new Date())//签发时间
.setExpiration(new Date(System.currentTimeMillis() tokenExpiration)) //过期时间
.setNotBefore(new Date(System.currentTimeMillis() 20*1000)) //20秒后可用
.setId(UUID.randomUUID().toString())
.claim("nickname", "Helen")
.claim("avatar", "1.jpg")
.signWith(SignatureAlgorithm.HS256, tokenSignKey)//签名哈希
.compact(); //转换成字符串
System.out.println(token);
}
}eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJndWxpLXVzZXIiLCJpc3MiOiJhdGd1aWd1IiwiYXVkIjoiYXRndWlndSIsImlhdCI6MTY2MjYzNTc0NiwiZXhwIjoxNjYyNzIyMTQ2LCJuYmYiOjE2NjI2MzU3NjYsImp0aSI6ImQ0OGE2MTY3LWNiNzMtNGQyMi1hMjg2LTJjNDU2YWYyOTY5MiIsIm5pY2tuYW1lIjoiSGVsZW4iLCJhdmF0YXIiOiIxLmpwZyJ9.KR9MIgf0Hykpa78GyxcEAcZHe8R_onDGpr7c3Ns3Mg8
2、解析token
代码语言：javascript复制 @Test
public void testGetUserInfo(){
String token = Jwts.builder()
.setHeaderParam("typ", "JWT") //令牌类型
.setHeaderParam("alg", "HS256") //签名算法
.setSubject("guli-user") //令牌主题
.setIssuer("atguigu")//签发者
.setAudience("atguigu")//接收者
.setIssuedAt(new Date())//签发时间
.setExpiration(new Date(System.currentTimeMillis() tokenExpiration)) //过期时间
.setNotBefore(new Date(System.currentTimeMillis())) //20秒后可用
.setId(UUID.randomUUID().toString())
.claim("nickname", "Helen")
.claim("avatar", "1.jpg")
.signWith(SignatureAlgorithm.HS256, tockenSigKey)//签名哈希
.compact(); //转换成字符串
System.out.println(token);
JwtParser parser = Jwts.parser();
Jws<Claims> claimsJws = parser.setSigningKey(tockenSigKey).parseClaimsJws(token);
Claims body = claimsJws.getBody();
String subject = body.getSubject();
Date issuedAt = body.getIssuedAt();
Date notBefore = body.getNotBefore();
String signature = claimsJws.getSignature();
System.out.println(subject);
System.out.println(notBefore);
System.out.println(issuedAt);
System.out.println(signature);
}
eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJndWxpLXVzZXIiLCJpc3MiOiJhdGd1aWd1IiwiYXVkIjoiYXRndWlndSIsImlhdCI6MTY2MjYzNTg4NywiZXhwIjoxNjYyNzIyMjg3LCJuYmYiOjE2NjI2MzU4ODcsImp0aSI6IjA0ZTBiZDk3LTFkOWItNGY5MS04M2RkLWEyMGI1OWI4Yjk1NiIsIm5pY2tuYW1lIjoiSGVsZW4iLCJhdmF0YXIiOiIxLmpwZyJ9.LPFZG5d5Y2YQuFjEKJQdrjrl_i9m5YsXECyK2qd232w guli-user Thu Sep 08 19:18:07 CST 2022 Thu Sep 08 19:18:07 CST 2022 LPFZG5d5Y2YQuFjEKJQdrjrl_i9m5YsXECyK2qd232w
