Spring Boot快速入门---（四）spring boot的表单验证以及AOP处理请求

一、使用@Valid表单验证

1.将我们的项目重新整理一下

 

2.在Girljava类中进行添加限制

 

3.在GirlController类的添加女生的方法中添加@Valid

 

4.模拟请求结果返回为空

 

 

 

二、AOP处理请求

AOP是一种编程范式，与语言无关，是一种程序设计思想。

面向切面（AOP）Aspect Oriented Programming

面向对象（OOP）Object Oriented Programming

 

面向过程到面向对象

换个角度看世界，换个姿势处理问题

将通用逻辑从业务逻辑中分离出来。

 

 

例：记录每一个http请求

1.先添加依赖

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

2.在项目中新建一个aspect包下HttpAspect类

（1）添加注解

@Aspect
@Component

（2）简便代码

@Before("execution(public * com.lcz.controller.GirlController.*(..))")
public void doBefore(){
    System.out.println("开始了");
}
@After("execution(public * com.lcz.controller.GirlController.*(..))")
public void doAfter(){
    System.out.println("结束了");
}

（3）获取请求代码

package com.lcz.aspect;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

/**
 * @Author:Coding Chaozhang
 */
@Aspect
@Component
public class HttpAspect {
    private final static Logger logger=LoggerFactory.getLogger(HttpAspect.class);
//    @Before("execution(public * com.lcz.controller.GirlController.*(..))")
//    public void doBefore(){
//        System.out.println("开始了");
//    }
//    @After("execution(public * com.lcz.controller.GirlController.*(..))")
//    public void doAfter(){
//        System.out.println("结束了");
//    }


    @Pointcut("execution(public * com.lcz.controller.GirlController.*(..))")
    public void log(){

    }

    @Before("log()")
    public void doBefore(JoinPoint joinPoint){
        //System.out.println("开始了");
        //logger.info("开始了");

        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request=attributes.getRequest();
        //url
        logger.info("url={}",request.getRequestURI());
        //method
        logger.info("method={}",request.getMethod());
        //ip
        logger.info("ip={}",request.getRemoteAddr());
        //类方法
        logger.info("class_method={}",joinPoint.getSignature().getDeclaringTypeName()+"."+joinPoint.getSignature().getName());
        //参数
        logger.info("args={}",joinPoint.getArgs());
    }

    @After("log()")
    public void doAfter(){
        //System.out.println("结束了");
        logger.info("结束了");
    }

    @AfterReturning(returning = "object",pointcut = "log()")
    public void doAfterReturning(Object object){
        logger.info("response={}",object.toString());
    }
}

（4）结果展示