SpringBoot自定义注解，Springboot权限角色注解

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©Copyright 蕃薯耀 2022-04-25

https://www.cnblogs.com/fanshuyao/

 
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
 
@Target({ElementType.TYPE, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface HasRoles {
 
    String[] value() default {};
    
    HasType hasType() default HasType.OR;
    
    //跳过检查，当类有注解，而类中某个方法不需要校验时，可以设置为true跳过检查
    boolean skipCheck() default false;
    
}

 
import java.lang.reflect.Method;
 
import javax.annotation.Resource;
 
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.stereotype.Component;
 
import com.zj31mep.biz.system.annotation.HasRoles;
import com.zj31mep.biz.system.annotation.HasType;
import com.zj31mep.biz.system.service.SysRoleService;
import com.zj31mep.exception.BizException;
import com.zj31mep.utils.ContextUtil;
import com.zj31mep.utils.RequestUtils;
 
@Component
@Aspect
public class HasRoleAop {
 
    private static final Logger log = LoggerFactory.getLogger(HasRoleAop.class);
    
    @Resource
    private SysRoleService sysRoleService;
    
    private final static String POINT_CUT = "pointCut()";
    
    //@annotation：用于匹配当前执行方法持有指定注解的方法
    //@within：用于匹配所有持有指定注解类型内的方法：target.getClass().equals(within表达式中指定的类型)
    //@target：用于匹配当前目标对象类型的执行方法，其中目标对象持有指定的注解
    //execution：用于匹配方法执行的连接点
    //@within和@target针对类的注解，@annotation是针对方法的注解
    //使用：
    //@Pointcut(value = "@within(com.zj31mep.biz.system.annotation.HasRoles) || @annotation(com.zj31mep.biz.system.annotation.HasRoles)")
    //@Pointcut(value = "@annotation(com.zj31mep.biz.system.annotation.HasRoles) && @annotation(hasRoles)")
    //@within不能注入@annotation(hasRoles)，不然@within会失效，获取注解通过反射
    //@annotation：只使用@annotation，能注入注解对象，如下：
    /*
     * @Around(value = "@annotation(com.zj31mep.biz.system.annotation.HasRoles) && @annotation(hasRoles)", argNames="hasRoles")
     * public Object around(ProceedingJoinPoint proceedingJoinPoint, HasRoles hasRoles) throws Throwable {
     */
    
    //@Pointcut("@annotation(com.zj31mep.biz.system.annotation.HasRoles)")
    @Pointcut(value = "@within(com.zj31mep.biz.system.annotation.HasRoles) "
            + "|| @annotation(com.zj31mep.biz.system.annotation.HasRoles)")
    public void pointCut() {}
    
    
    @Around(value = POINT_CUT)
    public Object around(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
        //log.info("proceedingJoinPoint = {}", proceedingJoinPoint);
        
        HasRoles hasRoles = null;
        
        Method targetMethod = getMethod(proceedingJoinPoint);
        
        if(targetMethod.isAnnotationPresent(HasRoles.class)){
            hasRoles = getMethodAnnotation(proceedingJoinPoint);
        
        }else {
            hasRoles = getClassAnnotation(proceedingJoinPoint);
        }
        
        
        if(hasRoles.skipCheck()) {
            return proceedingJoinPoint.proceed();
        }
        
        String[] values = hasRoles.value();
        if(values == null || values.length < 1) {
            BizException.error("@HasRoles value不能为空");
        }
        HasType hasType = hasRoles.hasType();
        
        if(!sysRoleService.hasRoleByRedis(values, hasType)) {
            //BizException.error("无权限访问");
            log.error("用户无权限访问Url：{} ，用户：{}", RequestUtils.getUrl(false), ContextUtil.getUser());
            
            return RequestUtils.response403();
        }
        
        return proceedingJoinPoint.proceed();
    }
    
    
    
    private Method getMethod(ProceedingJoinPoint joinPoint) {
        MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
        return methodSignature.getMethod();
    }
    
    private HasRoles getMethodAnnotation(ProceedingJoinPoint joinPoint) throws NoSuchMethodException {
        Method method = getMethod(joinPoint);
        return method.getAnnotation(HasRoles.class);
    }
    
    private HasRoles getClassAnnotation(ProceedingJoinPoint joinPoint) {
        return AnnotationUtils.findAnnotation(joinPoint.getTarget().getClass(), HasRoles.class);
    }
 
    
}

@within和@target针对类的注解，@annotation是针对方法的注解

@annotation：用于匹配当前执行方法持有指定注解的方法

@within：用于匹配所有持有指定注解类型内的方法：target.getClass().equals(within表达式中指定的类型)

@target：用于匹配当前目标对象类型的执行方法，其中目标对象持有指定的注解

execution：用于匹配方法执行的连接点

@within和@target的区别，主要是在继承中存在区别

方法上的注解优先于类上的注解，当类、方法同时有注解时，方法的注解生效，类的注解不生效。

@HasRoles({Role.ADMIN, Role.SUPER_ADMIN})

@HasRoles({Role.ADMIN, Role.SUPER_ADMIN})
public class SysDictController {}

@HasRoles(value = Role.SUPER_ADMIN)

@HasRoles(value = Role.SUPER_ADMIN)
@RequestMapping("/add")
public ModelAndView add() {}

@HasRoles(skipCheck = true)

@HasRoles(skipCheck = true)
@RequestMapping("/select")
public ModelAndView select() {}

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©Copyright 蕃薯耀 2022-04-25

https://www.cnblogs.com/fanshuyao/