spring boot快速入门 7: 使用aop处理请求

样例：登陆拦截（aop简单样例）

第一步：在pom 文件中加入aop依赖

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

第二步：建立处理文件

package com.payease.aspect;

import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

/**
 * Created by liuxiaoming on 2017/11/7.
 */
@Aspect
@Component
public class HttpAspect {

    //日志 为logger.info()提供
    private final static Logger logger = LoggerFactory.getLogger(HttpAspect.class);

    /**
     * 公共方法
     */
    @Pointcut("execution(public * com.payease.controller.GirlController.*(..))")
    public void log(){
        logger.info("@Pointcut 公共方法：拦截请求aop！");
    }

    /**
     * 方法执行之前
     */
    //@Before("execution(public * com.payease.controller.GirlController.*(..))")
    @Before("log()")
    public void doBefore(){
        logger.info("1。@Before 拦截请求aop！");
    }

    /**
     * 方法执行之后
     */
    @After("log()")
    public void doAfter(){
        logger.info("2。@After 拦截请求aop！");
    }
}

第三步：controller中的方法（未做改动）

//日志
private final static Logger logger = LoggerFactory.getLogger(GirlController.class);

@Autowired
private GirlRespository girlRespository;

@GetMapping("/girls")
public List<Girl> girlList(){
    logger.info("girlList方法！");
    return girlRespository.findAll();
}

第四步：启动项目 postman提交 查看控制台

aop获取http请求中的内容：

第一步：修改处理文件中的doBefore方法 新增获取返回值的方法

package com.payease.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;

/**
 * Created by liuxiaoming on 2017/11/7.
 */
@Aspect
@Component
public class HttpAspect {

    //日志 为logger.info()提供
    private final static Logger logger = LoggerFactory.getLogger(HttpAspect.class);

    /**
     * 公共方法
     */
    @Pointcut("execution(public * com.payease.controller.GirlController.*(..))")
    public void log(){
        logger.info("@Pointcut 公共方法：拦截请求aop！");
    }

    /**
     * 方法执行之前
     */
    //@Before("execution(public * com.payease.controller.GirlController.*(..))")
    @Before("log()")
    public void doBefore(JoinPoint joinPoint){
        logger.info("1。@Before 拦截请求aop！");

        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());

    }

    /**
     * 方法执行之后
     */
    @After("log()")
    public void doAfter(){
        logger.info("2。@After 拦截请求aop！");
    }

    /**
     * 获取返回值
     * @param object
     */
    @AfterReturning(returning = "object", pointcut = "log()")
    public void doAfterReturning(Object object){
        logger.info("response={}",object.toString());
    }
}

第二步：Girl对象新增toString()方法

package com.payease.domain;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.validation.constraints.Min;

/**
 * Created by liuxiaoming on 2017/11/6.
 */
@Entity
public class Girl {

    @Id
    @GeneratedValue
    private int id;

    private String cupSize;

    @Min(value=18,message = "未成年少女禁止入内！")
    private int age;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getCupSize() {
        return cupSize;
    }

    public void setCupSize(String cupSize) {
        this.cupSize = cupSize;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "Girl{" +
                "id=" + id +
                ", cupSize='" + cupSize + '\'' +
                ", age=" + age +
                '}';
    }
}

启动项目，postman提交 查看控制台