JWT令牌（一）

依赖

<!--        security依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
<!--        jwt依赖-->
        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt</artifactId>
            <version>0.9.1</version>
        </dependency>

生成令牌（荷载）

package com.itbignyi.server.config.security;

import io.jsonwebtoken.*;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.stereotype.Component;

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



/**
 * @Author: itbignyi
 * @Date: 2024-01-22-21:07
 * @Description: JwtTokenUtil
 */
@Component
public class JwtTokenUtil {


    /**
     * 荷载的token信息
     */
    private static final String CLAIM_KEY_USERNAME = "sub";
    private static final String CLAIM_KEY_CREATED = "created";


    /**
     * 密钥及失效时间
     */
    @Value("${jwt.secret}")
    private String secret;

    @Value("${jwt.expiration}")
    private Long expiration;


    /**
     * 根据用户信息生成token
     * @param userDetails
     * @return
     */
    public String generateToken(UserDetails userDetails) {
        Map<String, Object> claims = new HashMap<>();
        claims.put(CLAIM_KEY_USERNAME, userDetails.getUsername());
        claims.put(CLAIM_KEY_CREATED, new Date());
        return generateToken(claims);
    }


    /**
     * 从token中获取用户信息
     * @param token
     * @return
     */

    public String getUsernameFromToken(String token) {
        String username;
        try {
            Claims claims = getClaimsFromToken(token);
            username = claims.getSubject();
        } catch (Exception e) {
            username = null;
        }

        return username;
    }


    /**
     * 从token中获取荷载
     * @param token
     * @return
     */
    private Claims getClaimsFromToken(String token) {
        Claims claims = null;
        try {
            claims = Jwts.parser()
                    .setSigningKey(secret)
                    .parseClaimsJws(token)
                    .getBody();
        } catch (Exception e) {
            e.printStackTrace();
        }

        return claims;

    }


    /**
     * 校验token
     * @param token
     * @param userDetails
     * @return
     */
    public boolean validateToken(String token, UserDetails userDetails) {
        String username = getUsernameFromToken(token);
        return username.equals(userDetails.getUsername()) && !isTokenExpired(token);
    }


    /**
     * 判断token是否过期
     * @param token
     * @return
     */
    private boolean isTokenExpired(String token) {
        Date expireDate = getExpiredDateFromToken(token);
        return expireDate.before(new Date());

    }

    /**
     * 从token中获取过期时间
     * @param token
     * @return
     */
    private Date getExpiredDateFromToken(String token) {

        Claims claims = getClaimsFromToken(token);
        return claims.getExpiration();
    }


    /**
     * 判断token是否可以刷新
     * @param token
     * @return
     */
    public boolean canRefresh(String token) {
        return !isTokenExpired(token);

    }


    /**
     * 生成新的token(刷新)
     * @param token
     * @return
     */
    public String refreshToken(String token) {

        Claims claims = getClaimsFromToken(token);
        claims.put(CLAIM_KEY_CREATED, new Date());
        return generateToken(claims);
    }


    /**
     * 根据荷载生成token
     * @param claims
     * @return
     */
    private String generateToken(Map<String, Object> claims) {

        return Jwts.builder()
                .setClaims(claims)
                .setExpiration(generateExpirationDate())
                .signWith(SignatureAlgorithm.ES512, secret)
                .compact();
    }


    /**
     * 生成token失效时间
     * @return
     */
    private Date generateExpirationDate() {

        return new Date(System.currentTimeMillis() + expiration * 1000);

    }





}

配置

#jwt
jwt:
  tokenHeader: Authorization
#  密钥
  secret: yeb-secret
#  超限制时间
  expiration: 604800
#  负载开头
  tokenHead: Bearer

返回公共对象

package com.itbignyi.server.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

/**
 * @Author: itbignyi
 * @Date: 2024-01-23-11:25
 * @Description: 公共返回对象
 */


@Data
@NoArgsConstructor
@AllArgsConstructor
public class RespBean {

    private Long code;
    private String message;
    private Object data;


    /**
     * 成功返回
     *
     * @param message
     * @return
     */
    public static RespBean success(String message) {

        return new RespBean(200L, message, null);
    }

    /**
     * 成功返回
     *
     * @param message
     * @param data
     * @return
     */
    public static RespBean success(String message, Object data) {

        return new RespBean(200L, message, data);
    }


    /**
     * 失败返回
     *
     * @param message
     * @return
     */
    public static RespBean error(String message) {

        return new RespBean(500L, message, null);
    }


    /**
     * 失败返回
     *
     * @param message
     * @param data
     * @return
     */
    public static RespBean error(String message, Object data) {

        return new RespBean(500L, message, data);
    }


}

用户登录描述实体类

package com.itbignyi.server.pojo;

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.NoArgsConstructor;
import lombok.experimental.Accessors;

/**
 * @Author: itbignyi
 * @Date: 2024-01-23-14:07
 * @Description: 用户登录描述实体类
 */


@Data
@EqualsAndHashCode(callSuper = false)
@Accessors(chain = true)
@ApiModel(value="AdminLogin对象", description="")
public class AdminLoginParam {

    @ApiModelProperty(value = "用户名",required = true)
    private String username;
    @ApiModelProperty(value = "密码",required = true)
    private String password;

}