使用aop做权限控制

1、pom.xml文件内容如下：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.4</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.hmblogs</groupId>
    <artifactId>hmblogs</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>hmblogs</name>
    <description>hmblogs</description>
    <properties>
        <java.version>8</java.version>
        <druid.version>1.2.8</druid.version>
        <log4jdbc.version>1.16</log4jdbc.version>
        <es.version>7.9.2</es.version>
    </properties>
    <dependencies>
        <!-- druid数据源驱动 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>${druid.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!-- mybatis -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.5.3.1</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <!--Mysql依赖包-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>

        <!--lombok插件-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <!--监控sql日志-->
        <dependency>
            <groupId>org.bgee.log4jdbc-log4j2</groupId>
            <artifactId>log4jdbc-log4j2-jdbc4.1</artifactId>
            <version>${log4jdbc.version}</version>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.9</version>
        </dependency>

        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
        </dependency>

        <dependency>
            <groupId>org.apache.kafka</groupId>
            <artifactId>kafka-clients</artifactId>

        </dependency>

        <dependency>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka</artifactId>

        </dependency>

        <!-- high client-->
        <dependency>
            <groupId>org.elasticsearch.client</groupId>
            <artifactId>elasticsearch-rest-high-level-client</artifactId>
            <version>${es.version}</version>
            <exclusions>
                <exclusion>
                    <groupId>org.elasticsearch</groupId>
                    <artifactId>elasticsearch</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.elasticsearch.client</groupId>
                    <artifactId>elasticsearch-rest-client</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <!-- rest-high-level-client 依赖如下2个jar -->
        <dependency>
            <groupId>org.elasticsearch</groupId>
            <artifactId>elasticsearch</artifactId>
            <version>${es.version}</version>
        </dependency>
        <dependency>
            <groupId>org.elasticsearch.client</groupId>
            <artifactId>elasticsearch-rest-client</artifactId>
            <version>${es.version}</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-mongodb</artifactId>
        </dependency>

        <!--        spring需要依赖日志文件-->
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.2</version>
        </dependency>

        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.0</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.9.0</version>
        </dependency>

        <dependency>
            <groupId>com.googlecode.aviator</groupId>
            <artifactId>aviator</artifactId>
            <version>5.3.0</version>
        </dependency>




    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

2、application.yml文件内容如下：

server:
  port: 8081
  servlet.context-path: /

#配置数据源
spring:
  datasource:
    druid:
      db-type: com.alibaba.druid.pool.DruidDataSource
      driverClassName: net.sf.log4jdbc.sql.jdbcapi.DriverSpy
      url: jdbc:log4jdbc:mysql://${DB_HOST:localhost}:${DB_PORT:3306}/${DB_NAME:eladmin}?serverTimezone=Asia/Shanghai&characterEncoding=utf8&useSSL=false
      username: ${DB_USER:root}
      password: ${DB_PWD:密码}
  redis:
    host: localhost
    port: 6379
    password: 密码
    database: 10
#  data:
#    mongodb:
#      host: 43.138.0.199
#      port: 27017
#      username: hmblogs
#      password: 密码
#      database: hmblogs
#      authentication-database: admin

es:
  host: 43.138.0.199
  port: 9200
  scheme: http
  user: elastic
  password: 密码

3、AopController类代码如下：

package com.hmblogs.backend.controller;

import com.hmblogs.backend.util.PreAuthorize;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@Slf4j
public class AopController {

    @PreAuthorize(hasPermi = "system:stock:list")
    /**
     * findAllStocks
     * @return
     */
    @GetMapping(value = "/findAllStocks2")
    public String findAllStocks(){
        return "stockTest";
    }

}

4、PreAuthorize类代码如下：

package com.hmblogs.backend.util;

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

/**
 * 权限注解
 *
 */
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
public @interface PreAuthorize
{
    /**
     * 验证用户是否具备某权限
     */
    public String hasPermi() default "";

}

5、PreAuthorizeAspect类代码如下：

package com.hmblogs.backend.util;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;

import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

/**
 * 自定义权限实现
 *
 */
@Aspect
@Component
public class PreAuthorizeAspect{

    @Around("@annotation(com.hmblogs.backend.util.PreAuthorize)")
    public Object around(ProceedingJoinPoint point) throws Throwable
    {
        Signature signature = point.getSignature();
        MethodSignature methodSignature = (MethodSignature) signature;
        Method method = methodSignature.getMethod();
        PreAuthorize annotation = method.getAnnotation(PreAuthorize.class);
        if (annotation == null)
        {
            return point.proceed();
        }

        if (!StringUtils.isEmpty(annotation.hasPermi()))
        {
            if (hasPermi(annotation.hasPermi()))
            {
                return point.proceed();
            }
            throw new PreAuthorizeException("没有权限");
        }

        return point.proceed();
    }

    /**
     * 验证用户是否具备某权限
     *
     * @param permission 权限字符串
     * @return 用户是否具备某权限
     */
    public boolean hasPermi(String permission) {
        // 这里模拟从数据库查出来了哪些用户有哪些权限。
        Map<String, String> userList = new HashMap<>();
        userList.put("system:stock:list", "admin,heming,abc");
        userList.put("system:product:list", "admin");
        String users = userList.get(permission);
        if (StringUtils.isEmpty(users)) {
            return false;
        }
        String[] userArray = users.split(",");
        String blogUser = RequestAttributeUtil.getUser("blogUser");
        if (Arrays.asList(userArray).contains(blogUser)) {
            return true;
        }
        return false;
    }
}

6、PreAuthorizeException类代码如下：

package com.hmblogs.backend.util;

public class PreAuthorizeException extends RuntimeException{
    private String errMsg;

    public PreAuthorizeException(String message, Throwable cause) {
        super(message, cause);
        this.errMsg = message;
    }

    public PreAuthorizeException(String message) {
        super(message);
        this.errMsg = message;
    }

    public String getErrMsg() {
        return errMsg;
    }
}

7、验证

7.1没权限的情况，jack没权限访问这个接口。