springboot-aop实现

引入依赖

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

创建注解

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface Auth {
    String value() default "";
}

编写测试类

@RestController
@RequestMapping("/aopTest")
public class AopTest {
    //使用注解
    @Auth(value = "验证用户名和密码")
    @PostMapping("/login")
    public Object loginTest(@RequestBody Login login){
        return login;
    }
}

public class Login implements Serializable{
    private String username;
    private String password;

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

aop实现

@Aspect
@Component
public class LogAspect {
    private static final Logger log = LoggerFactory.getLogger(LogAspect.class);

    @Pointcut("@annotation(auth)")
    public void annotationPointcut(Auth auth){}

    @Around("annotationPointcut(auth)")
    public Object around(ProceedingJoinPoint pjp, Auth auth) throws Throwable {
        String value = auth.value();    // 获取AopTest.getString()上@Auth注解的value值
        //获取请求方法
        Signature sig = pjp.getSignature();
        String method = pjp.getTarget().getClass().getName() + "." + sig.getName();
        //获取请求的参数
        Object[] args = pjp.getArgs();
        //json转换
        String params = JSONObject.toJSONString(args);  // 获取请求参数
        // 序列化为JSON字符串时,会自动带上[],需要首位去掉,否则会报错:
        // com.alibaba.fastjson.JSONException: syntax error, expect {, actual [, pos 0, fastjson-version 1.2.56
        params  = params.substring(1, params.length() - 1);
        Login login = JSON.parseObject(params, Login.class);    // 将Json字符串反序列化为JAVA对象
        String username = login.getUsername();
        String password = login.getPassword();
        log.info("username: " + username + "  password: " + password);
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code","201");
        //执行方法,获取返回结果
        Object result = pjp.proceed();
        return !username.equalsIgnoreCase("李四") ? jsonObject : result;
    }
}

测试

• 访问： http://localhost:8092/aopTest/login
• 传入json：

{
    "username":"张三",
    "password":"123456"
}

{
    "username":"李四",
    "password":"123456"
}