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一、創(chuàng)建日志注解

1、日志類型枚舉類

import lombok.Getter;

/**
 * 日志類型枚舉類
 */
@Getter
public enum LogType {
    /**
     * 登錄
     */
    login("LoginLog");

    /**
     * 實(shí)現(xiàn)類名稱
     */
    private final String implClassName;

    LogType(String implClassName) {
        this.implClassName = implClassName;
    }
}

2、自定義日志注解

import java.lang.annotation.*;
import com.baige.enums.LogType;

/**
 * 自定義日志注解
 *
 * 注解說(shuō)明：
 * @Documented：文檔注解
 * @Retention(RetentionPolicy.RUNTIME)：生命周期注解，注解不僅被保存到class文件中，jvm加載class文件之后，仍然存在
 * @Target({ ElementType.PARAMETER, ElementType.METHOD })：@Target說(shuō)明了Annotation所修飾的對(duì)象范圍，ElementType.TYPE：接口、類、枚舉、注解，ElementType.METHOD：方法
 */
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ ElementType.PARAMETER, ElementType.METHOD })
public @interface Log {
    /**
     * 登錄類型
     */
    LogType logType();
}

二、利用AOP實(shí)現(xiàn)日志切面統(tǒng)一處理

1、日志實(shí)現(xiàn)類創(chuàng)建工廠

import com.baige.enums.LogType;
import com.baige.util.SpringContextHolder;
import org.springframework.context.ApplicationContext;

/**
 * 日志實(shí)現(xiàn)類創(chuàng)建工廠
 */
public class LogFactory {

    public static ApplicationContext context;

    public static IUserLog getInstance(LogType logType) {
        return (IUserLog) SpringContextHolder.getBean(logType.getImplClassName());
    }
}

2、切面類

import lombok.extern.slf4j.Slf4j;
import com.baige.aop.log.IUserLog;
import com.baige.aop.annotation.Log;
import com.baige.aop.log.LogFactory;

import org.aspectj.lang.annotation.*;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

@Slf4j
@Aspect
@Component
public class LogAspect {
    /**
     * 定義切入點(diǎn)，切入點(diǎn)為com.baige.controller.AopController中的所有函數(shù)
     * 通過(guò)@Pointcut注解聲明頻繁使用的切點(diǎn)表達(dá)式
     */
    @Pointcut("execution(public * com.baige.controller.UserController.*(..)))")
    public void pointcut() {
    }

    @Around("pointcut()")
    public void doAround(ProceedingJoinPoint pjp) {
        try {
            MethodSignature methodSignature = (MethodSignature) pjp.getSignature();
            Log log = methodSignature.getMethod().getAnnotation(Log.class);

            IUserLog userLog = LogFactory.getInstance(log.logType());
            userLog.addLog(pjp, log);

        } catch (Throwable throwable) {
            log.info("日志記錄異常，不影響正常業(yè)務(wù)", throwable);
        }
    }
}

三、創(chuàng)建日志實(shí)現(xiàn)類

1、添加日志接口

import com.baige.aop.annotation.Log;
import org.aspectj.lang.ProceedingJoinPoint;

import java.net.UnknownHostException;

public interface IUserLog {
    /**
     * 添加日志
     */
    int addLog(ProceedingJoinPoint pjp, Log log) throws UnknownHostException;
}

2、添加日志接口實(shí)現(xiàn)類

import java.util.Date;
import java.net.InetAddress;
import java.net.UnknownHostException;

import lombok.AllArgsConstructor;
import org.aspectj.lang.ProceedingJoinPoint;
import org.springframework.stereotype.Component;

import com.baige.domain.User;
import com.baige.domain.UserLog;
import com.baige.aop.log.IUserLog;
import com.baige.mapper.UserMapper;
import com.baige.aop.annotation.Log;
import com.baige.mapper.UserLogMapper;

@AllArgsConstructor
@Component("LoginLog")
public class LoginLog implements IUserLog {

    private final UserMapper userMapper;
    private final UserLogMapper userLogMapper;

    @Override
    public int addLog(ProceedingJoinPoint pjp, Log log) throws UnknownHostException {
        UserLog userLog = new UserLog();
        Object[] params = pjp.getArgs();

        if (params.length > 0) {
            User param = (User) params[0];
            User user = userMapper.getOne(param.getLoginName(), param.getLoginPassword());
            if (user != null) {
                userLog.setUserId(user.getId());
                userLog.setContent("獲取用戶信息成功");
            } else {
                userLog.setContent("未獲取到用戶信息");
            }
        }

        userLog.setIpAddress(InetAddress.getLocalHost().getHostAddress());
        userLog.setCreateTime(new Date());

        return userLogMapper.insert(userLog);
    }
}

四、controller

package com.baige.controller;

import lombok.AllArgsConstructor;
import org.springframework.web.bind.annotation.*;

import com.baige.domain.User;
import com.baige.enums.LogType;
import com.baige.aop.annotation.Log;
import com.baige.service.UserService;

@RestController
@AllArgsConstructor
@RequestMapping("/user")
public class UserController {

    private final UserService userService;

    @PostMapping("/login")
    @Log(logType = LogType.login)
    public String login(@RequestBody User params) {
        User user = userService.login(params.getLoginName(), params.getLoginPassword());
        return user != null ? "登錄成功" : "登錄失敗";
    }
}

分享題目：Spring Boot 中使用Spring Aop實(shí)現(xiàn)日志記錄功能
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