SpringBoot自定义注解实现Token校验的方法

1.定义Token的注解，需要Token校验的接口，方法上加上此注解

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface Token {
  boolean validate() default true;
}

2.定义LoginUser注解，此注解加在参数上，用在需要从token里获取的用户信息的地方

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Target(ElementType.PARAMETER)
@Retention(RetentionPolicy.RUNTIME)
public @interface LoginUser {
}

3.权限的校验拦截器

import com.example.demo.annotation.Token;
import com.example.demo.entity.User;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
@Slf4j
public class AuthorizationInterceptor extends HandlerInterceptorAdapter {
  public static final String USER_KEY = "USER_ID";
  public static final String USER_INFO = "USER_INFO";
  @Override
  public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
    Token annotation;
    if(handler instanceof HandlerMethod) {
      annotation = ((HandlerMethod) handler).getMethodAnnotation(Token.class);
    }else{
      return true;
    }
    //没有声明需要权限,或者声明不验证权限
    if(annotation == null || annotation.validate() == false){
      return true;
    }
    //从header中获取token
    String token = request.getHeader("token");
    if(token == null){
      log.info("缺少token，拒绝访问");
      return false;
    }

    //查询token信息
//    User user = redisUtils.get(USER_INFO+token,User.class);
//    if(user == null){
//      log.info("token不正确，拒绝访问");
//      return false;
//    }

    //token校验通过，将用户信息放在request中，供需要用user信息的接口里从token取数据
    request.setAttribute(USER_KEY, "123456");
    User user=new User();
    user.setId(10000L);
    user.setUserName("[e-mail]");
    user.setPhoneNumber("15702911111");
    user.setToken(token);
    request.setAttribute(USER_INFO, user);
    return true;
  }
}

4.写参数的解析器，将登陆用户对象注入到接口里

import com.example.demo.annotation.LoginUser;
import com.example.demo.entity.User;
import com.example.demo.interceptor.AuthorizationInterceptor;
import org.springframework.core.MethodParameter;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.ModelAndViewContainer;
@Component
public class LoginUserHandlerMethodArgumentResolver implements HandlerMethodArgumentResolver
{
  @Override
  public boolean supportsParameter(MethodParameter methodParameter) {
    return methodParameter.getParameterType().isAssignableFrom(User.class)&&methodParameter.hasParameterAnnotation(LoginUser.class);
  }

  @Override
  public Object resolveArgument(MethodParameter methodParameter, ModelAndViewContainer modelAndViewContainer, NativeWebRequest nativeWebRequest, WebDataBinderFactory webDataBinderFactory) throws Exception {
    //获取登陆用户信息
    Object object = nativeWebRequest.getAttribute(AuthorizationInterceptor.USER_INFO, RequestAttributes.SCOPE_REQUEST);
    if(object == null){
      return null;
    }
    return (User)object;
  }
}

5.配置拦截器和参数解析器

import com.example.demo.interceptor.AuthorizationInterceptor;
import com.example.demo.resolver.LoginUserHandlerMethodArgumentResolver;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import java.util.List;

@Configuration
public class WebMvcConfig implements WebMvcConfigurer {
  @Autowired
  private AuthorizationInterceptor authorizationInterceptor;
  @Autowired
  private LoginUserHandlerMethodArgumentResolver loginUserHandlerMethodArgumentResolver;

  @Override
  public void addInterceptors(InterceptorRegistry registry) {
    registry.addInterceptor(authorizationInterceptor).addPathPatterns("/api/**");
  }

  @Override
  public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
    argumentResolvers.add(loginUserHandlerMethodArgumentResolver);
  }
}

7.测试类

import com.example.demo.annotation.LoginUser;
import com.example.demo.annotation.Token;
import com.example.demo.entity.User;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping(value = "/api")
@Slf4j
public class TestController {
  @RequestMapping(value="/test",method = RequestMethod.POST)
  @Token
  public String test(@LoginUser User user){
    System.out.println("需要token才可以访问，呵呵……");
    log.info("user："+user.toString());
    return "test";
  }
  @RequestMapping(value="/noToken",method = RequestMethod.POST)
  public String noToken(){
    System.out.println("不用token就可以访问……");
    return "test";
  }
}

至此，自定义注解实现token校验就大功告成了。

到此这篇关于SpringBoot自定义注解实现Token校验的方法的文章就介绍到这了,更多相关SpringBoot Token校验内容请搜索服务器之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持服务器之家！

原文链接：https://blog.csdn.net/qq_33556185/article/details/105420205