1.引入依赖 <dependencies> <!-- JWT--> <dependency> <groupId>io.jsonwebtoken</groupId> <artifactId>jjwt</artifactId> </dependency> </dependencies> 2.创建JWT工具类 import io.jsonwebtoken.Claims; import io.jsonwebtoken.Jws; import io.jsonwebtoken.Jwts; import io.jsonwebtoken.SignatureAlgorithm; import org.springframework.util.StringUtils; import javax.servlet.http.HttpServletRequest; import java.util.Date; /** * @author */ public class JwtUtils { public static final long EXPIRE = 1000 * 60 * 60 * 24;//token过期的时间 public static final String APP_SECRET = "ukc8BDbRigUDaY6pZFfWus2jZWLPHO";//密钥 /** * 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")//这两个是头信息,默认就好 .setSubject("guli-user")//名字随意取 .setIssuedAt(new Date()) .setExpiration(new Date(System.currentTimeMillis() + EXPIRE))//设置过期时间 .claim("id", id)//设置token的主体部分,存储用户信息 .claim("nickname", nickname) .signWith(SignatureAlgorithm.HS256, APP_SECRET)//签名哈希。默认就好 .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"); } }