JWT

    科技2022-07-11  108

    JWT\

    参考文章使用JWT实现单点登录(完全跨域方案)

    JWT 分为三个部分

    头部携带元数据主体携带用户信息结尾携带校验信息

    1.pom

    <dependencies> <!-- JWT--> <dependency> <groupId>io.jsonwebtoken</groupId> <artifactId>jjwt</artifactId> </dependency> </dependencies>

    2. java代码

    import io.jsonwebtoken.Claims; import io.jsonwebtoken.Jws; import io.jsonwebtoken.Jwts; import io.jsonwebtoken.SignatureAlgorithm; import org.springframework.http.server.reactive.ServerHttpRequest; import org.springframework.util.StringUtils; import javax.servlet.http.HttpServletRequest; import java.util.Date; /** * @author helen * @since 2019/10/16 */ public class JwtUtils { //常量 public static final long EXPIRE = 1000 * 60 * 60 * 24; //token过期时间 public static final String APP_SECRET = "ukc8BDbRigUDaY6pZFfWus2jZWLPHO"; //秘钥 //生成token字符串的方法 public static String getJwtToken(String id, String nickname){ String JwtToken = Jwts.builder() .setHeaderParam("typ", "JWT") .setHeaderParam("alg", "HS256") //分类加过期时间 .setSubject("guli-user") .setIssuedAt(new Date()) .setExpiration(new Date(System.currentTimeMillis() + EXPIRE)) .claim("id", id) //设置token主体部分 ,存储用户信息 .claim("nickname", nickname) .signWith(SignatureAlgorithm.HS256, APP_SECRET) .compact(); return JwtToken; } /** * 判断token是否存在与有效 * @param jwtToken * @return */ public static boolean checkToken(String jwtToken) { if(StringUtils.isEmpty(jwtToken)) return false; try { Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken); } catch (Exception e) { e.printStackTrace(); return false; } return true; } /** * 判断token是否存在与有效 * @param request * @return */ public static boolean checkToken(HttpServletRequest request) { try { String jwtToken = request.getHeader("token"); if(StringUtils.isEmpty(jwtToken)) return false; Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken); } catch (Exception e) { e.printStackTrace(); return false; } return true; } /** * 根据token字符串获取会员id * @param request * @return */ public static String getMemberIdByJwtToken(HttpServletRequest request) { String jwtToken = request.getHeader("token"); if(StringUtils.isEmpty(jwtToken)) return ""; Jws<Claims> claimsJws = Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken); Claims claims = claimsJws.getBody(); return (String)claims.get("id"); } }
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