SpringBoot(六)_AOP统一处理请求
什么是AOP
- AOP 是一种编程范式,与编程语言无关;
- 将通用逻辑从业务逻辑中分离出来(假如你的业务是一条线,我们不在业务线上写一行代码就能完成附加任务!我们会把代码写在其他的地方);
具体实现
(1) 引入依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
</dependency>
(2) 创建HttpAspect.java 文件
- 类上加入@Aspect @Component 注解
- 使用@Pointcut 定义一个公共的方法,定义切哪个点
- @Before @After @AfterReturning 这三个注解是切的时间点
- 使用org.slf4j.Logger 进行日志记录
package com.imooc.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 org.springframework.web.servlet.support.RequestContext;
import javax.servlet.http.HttpServletRequest;
/**
* @Auther: curry
* @Date: 2018/6/2 13:45
* @Description:
*/
@Aspect
@Component
public class HttpAspect {
private final static Logger logger = LoggerFactory.getLogger(HttpAspect.class);
@Pointcut("execution( public * com.imooc.controller.GirlController.*(..))")
public void log(){
}
@Before("log()")
public void doBefore(JoinPoint joinPoint){
ServletRequestAttributes attributes = (ServletRequestAttributes)RequestContextHolder.getRequestAttributes();
HttpServletRequest request = attributes.getRequest();
// url
logger.info("url={}",request.getRequestURL());
//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(){
}
@AfterReturning(pointcut = "log()",returning = "object")
public void doAfterReturning(Object object){
logger.info("response = {}",object);
}
}
(3)进行测试
//前面省略 以下代码
2018-06-02 19:53:17.874 INFO 10088 --- [nio-8099-exec-1] com.imooc.aspect.HttpAspect
: url=http://localhost:8099/girls
: method = POST
: ip = 0:0:0:0:0:0:0:1
: class_method=com.imooc.controller.GirlController.girlAdd
: args = Girl{id=0, name='maomao', age=7}
: response = com.imooc.entity.Result@6a84c72f
小彩蛋
springboot 支持打印自定义banner,只要在resources 下面新建一个banner.txt 文件
文件内容,每次启动,就会显示下面的图,是不是很酷
_ooOoo_
o8888888o
88" . "88
(| -_- |)
O\ = /O
____/`---'\____
.' \\| |// `.
/ \\||| : |||// \
/ _||||| -:- |||||- \
| | \\\ - /// | |
| \_| ''\---/'' | |
\ .-\__ `-` ___/-. /
___`. .' /--.--\ `. . __
."" '< `.___\_<|>_/___.' >'"".
| | : `- \`.;`\ _ /`;.`/ - ` : | |
\ \ `-. \_ __\ /__ _/ .-` / /
======`-.____`-.___\_____/___.-`____.-'======
`=---='
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
佛祖保佑 永无BUG