这篇文章主要介绍了Spring框架实现AOP添加日志记录功能过程详解,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下
需求，在调用业务方法的时候，在被调用的业务方法的前面和后面添加上日志记录功能
整体架构：
日志处理类：
package aop;
import java.util.Arrays;
import org.apache.log4j.Logger;
import org.aspectj.lang.JoinPoint;
//日志处理类 增强处理类-日志
public class UserServiceLogger {
private Logger logger = Logger.getLogger(UserServiceLogger.class);
// 前置增强
public void before(JoinPoint joinPoint) {
logger.info("调用" + joinPoint.getTarget() + "的"
+ joinPoint.getSignature() + "方法，方法参数是："
+ Arrays.toString(joinPoint.getArgs()));
}
// 后置增强
public void afterReturning(JoinPoint joinPoint,Object result) {
logger.info("调用" + joinPoint.getTarget() + "的"
+ joinPoint.getSignature() + "方法，方法的返回值是："
+result);
}
}
下面是一个三层架构模式：
package dao;
import entity.User;
public interface UserDao {
public void save(User user);
}
package dao.impl;
import dao.UserDao;
import entity.User;
public class UserDaoImpl implements UserDao {
public void save(User user) {
// 这里并未实现完整的数据库操作，仅为说明问题
System.out.println("保存用户信息到数据库");
}
}
package entity;
public class User implements java.io.Serializable {
private Integer id; // 用户ID
private String username; // 用户名
private String password; // 密码
private String email; // 电子邮件
// getter & setter
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
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;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
}
package service;
import entity.User;
public interface UserService {
public void addNewUser(User user);
}
package service.impl;
import service.UserService;
import dao.UserDao;
import entity.User;
public class UserServiceImpl implements UserService {
// 声明接口类型的引用，和具体实现类解耦合
private UserDao dao;
// dao 属性的setter访问器，会被Spring调用，实现设值注入
public void setDao(UserDao dao) {
this.dao = dao;
}
public void addNewUser(User user) {
// 调用用户DAO的方法保存用户信息
dao.save(user);
}
}
编写单元测试方法：
package test;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import service.UserService;
import service.impl.UserServiceImpl;
import entity.User;
public class AopTest {
@Test
public void aopTest() {
ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
UserService service = (UserService) ctx.getBean("service");
User user = new User();
user.setId(1);
user.setUsername("test");
user.setPassword("123456");
user.setEmail("test@xxx.com");
service.addNewUser(user);
}
}
applicationContext.xml核心配置文件：
运行结果：
12-29 15:13:06[INFO]org.springframework.context.support.ClassPathXmlApplicationContext -Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@2db0f6b2: startup date [Sun Dec 29 15:13:06 CST 2019]; root of context hierarchy 12-29 15:13:06[INFO]org.springframework.beans.factory.xml.XmlBeanDefinitionReader -Loading XML bean definitions from class path resource [applicationContext.xml] 12-29 15:13:06[INFO]org.springframework.beans.factory.support.DefaultListableBeanFactory -Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@3701eaf6: defining beans [userDao,service,theLogger,org.springframework.aop.config.internalAutoProxyCreator,pointcut,org.springframework.aop.aspectj.AspectJPointcutAdvisor#0,org.springframework.aop.aspectj.AspectJPointcutAdvisor#1]; root of factory hierarchy 12-29 15:13:06[INFO]aop.UserServiceLogger -调用service.impl.UserServiceImpl@3c130745的void service.UserService.addNewUser(User)方法，方法参数是：[entity.User@2e4b8173] 保存用户信息到数据库 12-29 15:13:06[INFO]aop.UserServiceLogger -调用service.impl.UserServiceImpl@3c130745的void service.UserService.addNewUser(User)方法，方法的返回值是：null
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持考高分网。
