AOP的入门和案例（注解）
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Spring

AOP的入门和案例（注解）

limei
limei
2023-09-18 / 2 评论 / 33 阅读 / 正在检测是否收录...

AOP的配置

注解开发AOP制作步骤

在XML格式基础上

  • 导入坐标（伴随spring-context坐标导入已经依赖导入完成）
  • 开启AOP注解支持
  • 配置切面@Aspect
  • 定义专用的切入点方法，并配置切入点@Pointcut
  • 为通知方法配置通知类型及对应切入点@Before

注解开发AOP注意事项

1.切入点最终体现为一个方法，无参无返回值，无实际方法体内容，但不能是抽象方法
2.引用切入点时必须使用方法调用名称，方法后面的（）不能省略
3.切面类中定义的切入点只能在当前类中使用，如果想引用其他类中定义的切入点使用“类名.方法名()”引用
4.可以在通知类型注解后添加参数，实现XML配置中的属性，例如after-returning后的returning属性

AOP的注解驱动

AOP注解驱动

实体类和jdbc的编写

package com.limei.domain;
import java.io.Serializable;
public class Account implements Serializable {

    private Integer id;
    private String name;
    private Double money;

    public Integer getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Double getMoney() {
        return money;
    }

    public void setMoney(Double money) {
        this.money = money;
    }

    @Override
    public String toString() {
        return "Account{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", money=" + money +
                '}';
    }
}

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/lianxi
jdbc.username=root
jdbc.password=123456

config编写

package com.limei.config;

import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;

import javax.sql.DataSource;

public class JDBCConfig {
    @Value("${jdbc.driver}")
    private String driver;
    @Value("${jdbc.url}")
    private String url;
    @Value("${jdbc.username}")
    private String userName;
    @Value("${jdbc.password}")
    private String password;

    @Bean("dataSource")
    public DataSource getDataSource(){
        DruidDataSource ds = new DruidDataSource();
        ds.setDriverClassName(driver);
        ds.setUrl(url);
        ds.setUsername(userName);
        ds.setPassword(password);
        return ds;
    }
}

package com.limei.config;

import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;

import javax.sql.DataSource;

public class MyBatisConfig {

    @Bean
    public SqlSessionFactoryBean getSqlSessionFactoryBean(@Autowired DataSource dataSource){
        SqlSessionFactoryBean ssfb = new SqlSessionFactoryBean();
        ssfb.setTypeAliasesPackage("com.limei.domain");
        ssfb.setDataSource(dataSource);
        return ssfb;
    }

    @Bean
    public MapperScannerConfigurer getMapperScannerConfigurer(){
        MapperScannerConfigurer msc = new MapperScannerConfigurer();
        msc.setBasePackage("com.limei.dao");
        return msc;
    }

}

package com.limei.config;
import com.limei.aop.RunTimeMonitorAdvice;
import com.limei.config.JDBCConfig;
import com.limei.config.MyBatisConfig;
import org.springframework.context.annotation.*;

@Configuration
@ComponentScan ( "com" )
@PropertySource("classpath:jdbc.properties")
@Import({JDBCConfig.class, MyBatisConfig.class})
@EnableAspectJAutoProxy
public class SpringConfig {
}

dao层编写

package com.limei.dao;

import com.limei.domain.Account;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;

import java.util.List;

public interface AccountDao {

    @Insert("insert into account(name,money)values(#{name},#{money})")
    void save(Account account);

    @Delete("delete from account where id = #{id} ")
    void delete(Integer id);

    @Update("update account set name = #{name} , money = #{money} where id = #{id} ")
    void update(Account account);

    @Select("select * from account")
    List<Account> findAll();

    @Select("select * from account where id = #{id}")
    Account findById(Integer id);
}

service层编写

package com.limei.service;

import com.limei.domain.Account;

import java.util.List;

public interface AccountService {

    void save(Account account);

    void delete(Integer id);

    void update(Account account);

    List<Account> findAll();

    Account findById(Integer id);
}

package com.limei.service.impl;


import com.limei.dao.AccountDao;
import com.limei.domain.Account;
import com.limei.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
@Service("accountService")
public class AccountServiceImpl implements AccountService {

    @Autowired
    private AccountDao accountDao;

    public void save(Account account) {
        accountDao.save(account);
    }

    public void update(Account account){
        accountDao.update(account);
    }

    public void delete(Integer id) {
        accountDao.delete(id);
    }

    public Account findById(Integer id) {
        return accountDao.findById(id);
    }

    public List<Account> findAll() {
        return accountDao.findAll();
    }
}

aop的编写

package com.limei.aop;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;

@Component
@Aspect
public class RunTimeMonitorAdvice {

    //切入点，监控业务层接口
    @Pointcut("execution(* com.limei.service.*Service.find*(..))")
    public void pt(){
    }

    @Around("pt()")
    public Object runtimeAround(ProceedingJoinPoint pjp) throws Throwable {
        //获取执行签名信息
        Signature signature = pjp.getSignature();
        //通过签名获取执行类型（接口名）
        String className = signature.getDeclaringTypeName();
        //通过签名获取执行操作名称（方法名）
        String methodName = signature.getName();
        //原始方法的调用
        Object ret=pjp.proceed (pjp.getArgs ());
        //执行时长累计值
        long sum = 0L;

        for (int i = 0; i < 10000; i++) {
            //获取操作前系统时间beginTime
            long startTime = System.currentTimeMillis();
            //原始操作调用
            pjp.proceed(pjp.getArgs());
            //获取操作后系统时间endTime
            long endTime = System.currentTimeMillis();
            sum += endTime-startTime;
        }
        //打印信息
        System.out.println(className+":"+methodName+"   (万次）run:"+sum+"ms");
        return ret;
    }
}

测试类编写

package com.limei.service;


import com.limei.config.SpringConfig;
import com.limei.domain.Account;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.util.List;

//设定spring专用的类加载器
@RunWith(SpringJUnit4ClassRunner.class)
//设定加载的spring上下文对应的配置
@ContextConfiguration(classes = SpringConfig.class)
public class UserServiceTest {
    @Autowired
    private AccountService accountService;

    @Test
    public void testFindById(){
        Account ac = accountService.findById(1);
        System.out.println(ac);
    }

    @Test
    public void testFindAll(){
        List<Account> list = accountService.findAll();
//        System.out.println(list);
    }
}

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.limei.aop</groupId>
    <artifactId>Spring_aop</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.1.9.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.4</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.16</version>
        </dependency>

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.3</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.1.9.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.0</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.1.9.RELEASE</version>
        </dependency>

    </dependencies>
</project>
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