jwt使用

package mr.li.hello.demo;

import java.util.HashMap;
import java.util.Map;

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

public class JwtDemo {

    public static String secret = "secret";

    public static String token_prefix = "token前缀";

    /**
     * <pre>
     * 生成jwt token
     * </pre>
     * 
     * @return
     */
    public static String genertateToken() {
        HashMap<String, Object> map = new HashMap<String, Object>();
        map.put("id", "111111");
        map.put("name", "龙哥");
        String jwt = Jwts.builder().
                setSubject("jwt中存放的用户数据")
                .setClaims(map)
                .signWith(SignatureAlgorithm.HS512, secret)
                .compact();
        return token_prefix  + jwt;
    }

    /**
     * <pre>解析jwt token</pre> 
     * @param token
     * @return
     */
    public static Map<String, String> validateToken(String token) {
        Map<String, Object> map = Jwts.parser().setSigningKey(secret).parseClaimsJws(token.replace(token_prefix, ""))
                .getBody();
        String id = String.valueOf(map.get("id"));
        String name = String.valueOf(map.get("name"));
        Map<String, String> map1 = new HashMap<String, String>();
        map1.put("id", id);
        map1.put("name", name);
        return map1;
    }
    
    
    public static void main(String[] args) {
        String jwtToken = genertateToken();
        Map<String, String> map = validateToken(jwtToken);
        System.out.println(map);
    }
}

 引入pom坐标

<project xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>cn.mr.li</groupId>
    <artifactId>hello-world</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>
    <!-- 父依赖为spring2.1.6 -->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.6.RELEASE</version>
    </parent>
    <properties>
        <jwt-version>0.7.0</jwt-version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt</artifactId>
            <version>${jwt-version}</version>
        </dependency>
    </dependencies>
    
</project>