1、引入依赖
<dependency><groupId>com.auth0</groupId><artifactId>java-jwt</artifactId><version>3.4.0</version> </dependency>
2、自定义注解
跳过验证注解
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;/*** @email 913062247@qq.com* @author:菜园子* @date: 2019/6/11* @time: 10:58*/
@Target({ElementType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface PassToken {boolean required() default true;
}
验证token权限注解
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;/*** @email 913062247@qq.com* @author:菜园子* @date: 2019/6/11* @time: 11:04*/
@Target({ElementType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface UserLoginToken {boolean required() default true;
}
3、工具类（jwt.key配置文件application.properties）
import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTVerifier;
import com.auth0.jwt.algorithms.Algorithm;
import com.diveyun.gas.entity.User;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;/*** @email 913062247@qq.com* @author:菜园子* @date: 2019/6/13* @time: 14:06*/
@Component
public class JwtUtils {private static String key;@Value("${jwt.key}")public void setKey(String key) {JwtUtils.key = key;}/*创建token*/public static String getToken(User user){String token = JWT.create().withAudience(String.valueOf(user.getId())).sign(Algorithm.HMAC256(key));return token;}/*校验token*/public static void verify(String token,User user){// 验证 tokenJWTVerifier jwtVerifier = JWT.require(Algorithm.HMAC256(key)).build();jwtVerifier.verify(token);}
}
4、拦截器
import com.auth0.jwt.JWT;
import com.auth0.jwt.exceptions.JWTDecodeException;
import com.auth0.jwt.exceptions.JWTVerificationException;
import com.diveyun.gas.anno.PassToken;
import com.diveyun.gas.anno.UserLoginToken;
import com.diveyun.gas.dao.UserDao;
import com.diveyun.gas.entity.User;
import com.diveyun.gas.tools.JwtUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.lang.reflect.Method;/*** @email 913062247@qq.com* @author:菜园子* @date: 2019/6/11* @time: 14:53*/
public class AuthenticationInterceptor implements HandlerInterceptor {@Autowiredprivate UserDao userDao;@Overridepublic boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object object) throws Exception {String token = httpServletRequest.getHeader("token");// 从 http 请求头中取出 token// 如果不是映射到方法直接通过if(!(object instanceof HandlerMethod)){return true;}HandlerMethod handlerMethod=(HandlerMethod)object;Method method=handlerMethod.getMethod();//检查是否有passtoken注释，有则跳过认证if (method.isAnnotationPresent(PassToken.class)) {PassToken passToken = method.getAnnotation(PassToken.class);if (passToken.required()) {return true;}}//检查有没有需要用户权限的注解if (method.isAnnotationPresent(UserLoginToken.class)) {UserLoginToken userLoginToken = method.getAnnotation(UserLoginToken.class);if (userLoginToken.required()) {// 执行认证if (token == null) {throw new RuntimeException("无token，请重新登录");}// 获取 token 中的 user idInteger userId;try {userId = Integer.parseInt(JWT.decode(token).getAudience().get(0));} catch (JWTDecodeException j) {throw new RuntimeException("401");}User user = userDao.findById(userId);if (user == null) {throw new RuntimeException("用户不存在，请重新登录");}// 验证 tokentry {JwtUtils.verify(token,user);} catch (JWTVerificationException e) {throw new RuntimeException("token异常，请重新登录！");}return true;}}return true;}@Overridepublic void postHandle(HttpServletRequest httpServletRequest,HttpServletResponse httpServletResponse,Object o, ModelAndView modelAndView) throws Exception {}@Overridepublic void afterCompletion(HttpServletRequest httpServletRequest,HttpServletResponse httpServletResponse,Object o, Exception e) throws Exception {}
}
5、配置拦截器
import com.diveyun.gas.interceptor.AuthenticationInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;/*** @email 913062247@qq.com* @author:菜园子* @date: 2019/6/11* @time: 16:21*/
@Configuration
public class InterceptorConfig implements WebMvcConfigurer {public void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(authenticationInterceptor()).addPathPatterns("/**");}@Beanpublic AuthenticationInterceptor authenticationInterceptor() {return new AuthenticationInterceptor();}
}
6、测试
@RequestMapping("/login")
@WebLog(description = "访问登录接口")
@PassToken
public ReturnJson login(User user){ReturnJson result = new ReturnJson();try {if (StringUtils.isEmpty(user.getUserName()) || StringUtils.isEmpty(user.getPassword())){result.setMsg("用户名或密码不能为空！");return result;}JSONObject data = new JSONObject();List<User> list = userDao.findAll(user);if (list.size() != 1){result.setMsg("用户名不存在！");return result;}User dbUser = list.get(0);if (!StringUtils.equals(user.getPassword(),dbUser.getPassword())){result.setMsg("密码不正确！");return result;}String token = JwtUtils.getToken(dbUser);data.put("userName",user.getUserName());data.put("token",token);result.setCode(0);result.setMsg("请求成功!");result.setData(data.toString());}catch (Exception e){throw new RuntimeException(e.getMessage());}return result;
}