spring整合MyBatis 实现代理(proxy) 打印用时信息小记

首先，我这里用的是创建的 maven 项目，所以要导入以下依赖(pom.xml)：

<dependencies><!--测试--><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.13.2</version><scope>test</scope></dependency><!--        MyBatis核心Jar包--><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.5.9</version></dependency><!--        MySql驱动--><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.27</version></dependency><!--        Lombok工具--><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.24</version></dependency><!--        Spring核心--><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>5.3.20</version></dependency><!--        Spring-test测试--><dependency><groupId>org.springframework</groupId><artifactId>spring-test</artifactId><version>5.3.20</version></dependency><!--        slf4j日志包--><!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-log4j12 --><dependency><groupId>log4j</groupId><artifactId>log4j</artifactId><version>1.2.17</version></dependency><!--        druid数据库连接池--><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.2.11</version></dependency><!--        Spring整合ORM--><!-- https://mvnrepository.com/artifact/org.springframework/spring-orm --><dependency><groupId>org.springframework</groupId><artifactId>spring-orm</artifactId><version>5.3.20</version></dependency><!--        Spring整合MyBatis--><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>2.0.7</version></dependency></dependencies>

接下来是创建的一些需要的静态资源文件（步骤1）：

我的工程目录结构如下（本文是以dynamic_D 为例）：

1) jdbc.properties（我这里使用的是mysql 8以上的版本配置）

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url= jdbc:mysql://localhost:3306/esms(要连接的数据库名称)?useSSL=false&serverTimezone=UTC&allowPublicKeyRetrieval=true
jdbc.username=root(自己的数据库登录名)
jdbc.password=XXXX(自己的数据库链接密码)

2）log4j.properties（需要以下这些已经足够）

log4j.rootLogger=DEBUG, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p %d %C: %m%nlog4j.logger.java.sql.ResultSet=INFO
log4j.logger.org.apache=INFO
log4j.logger.java.sql.Connection=DEBUG
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUG

3）mybatis.xml（可以根据自身需求添加相应的配置）

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configurationPUBLIC "-//mybatis.org//DTD Config 3.0//EN""http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration><settings><!-- 设置启用懒加载--><setting name="lazyLoadingEnabled" value="true"/><!-- 设置启用缓存--><setting name="cacheEnabled" value="true"/></settings></configuration>

4）spring-config.xml（这里引入了context 的命名空间）

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:context="http://www.springframework.org/schema/context"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"><!--导入jdbc.properties--><context:property-placeholder location="classpath:jdbc.properties" file-encoding="UTF-8"/><!--设置扫描的包路径名：扫描@Component注解--><context:component-scan base-package="com.czh.dynamic_D"/><!--配置druid数据源--><bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"><property name="url" value="${jdbc.url}"/><property name="username" value="${jdbc.username}"/><property name="password" value="${jdbc.password}"/></bean><!--配置SqlSessionFactoryBean（MyBatis）--><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource"/><property name="typeAliasesPackage" value="com.czh.dynamic_D.entity"/><property name="configLocation" value="classpath:mybatis.xml"/></bean><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/><property name="basePackage" value="com.czh.dynamic_D.mapper"/></bean><bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate"><constructor-arg index="0" ref="sqlSessionFactory"/></bean></beans>

接下来是根据自己的需求创建实体类(Manager)，对数据库进行操作的接口(MamagerMapper)和该接口的实现类(ManagerMapperImpl)，然后就是创建一个代理工厂类 (ObjectProxyFactory) 实现动态生成代理对象。(步骤2)：

1）创建实体类（Manager）

package com.czh.dynamic_D.entity;import lombok.Data;import java.io.Serializable;
@Data
public class Manager implements Serializable {private Integer id;private String name;private String password;private String rname;private String sex;private Integer age;private String tel;
}

2）创建接口（ManagerMapper）以下的操作按照需求自己操作

package com.czh.dynamic_D.mapper;import com.czh.dynamic_D.entity.Manager;
import org.apache.ibatis.annotations.*;import java.util.List;
public interface ManagerMapper {@Select("select * from t_manager")@Results(id = "managerMap",value = {@Result(property = "id" ,column = "id",id = true),@Result(property = "rname",column = "realname")})List<Manager> selectAll();@Select("select * from t_manager where name=#{name}")@ResultMap("managerMap")Manager selectOneManager(@Param("name") String name);@Insert("insert into t_manager values(null,#{name},#{password},#{rname},#{sex},#{age},null,#{tel},default,1,1,2)")Integer insertManager(Manager manager);@Update("update t_manager set name=#{name},password=#{password},realname=#{rname},sex=#{sex},tel=#{tel} where id=#{id}")Integer updateManagerTwo(Manager manager);@Delete("delete from t_manager where id = #{id}")Integer deleteManager(Integer id);
}

3）创建接口的实现类（ManagerMapperImpl）

package com.czh.dynamic_D.mapper.impl;import com.czh.dynamic_D.entity.Manager;
import com.czh.dynamic_D.mapper.ManagerMapper;
import org.apache.ibatis.annotations.Result;
import org.apache.ibatis.annotations.Results;
import org.apache.ibatis.annotations.Select;
import org.mybatis.spring.SqlSessionTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Repository;import java.util.List;@Repository("managerMapperImpl")
public class ManagerMapperImpl implements ManagerMapper {@Autowired@Qualifier("sqlSessionTemplate")SqlSessionTemplate sst;@Overridepublic List<Manager> selectAll() {return sst.selectList("com.czh.dynamic_D.mapper.ManagerMapper.selectAll");}@Overridepublic Manager selectOneManager(String name) {return sst.selectOne("com.czh.dynamic_D.mapper.ManagerMapper.selectOneManager",name);}@Overridepublic Integer insertManager(Manager manager) {return sst.insert("com.czh.dynamic_D.mapper.ManagerMapper.insertManager",manager);}@Overridepublic Integer updateManagerTwo(Manager manager) {return sst.update("com.czh.dynamic_D.mapper.ManagerMapper.updateManagerTwo",manager);}@Overridepublic Integer deleteManager(Integer id) {return sst.delete("com.czh.dynamic_D.mapper.ManagerMapper.deleteManager",id);}
}

4）创建代理工厂类（ObjectProxyFactory）

package com.czh.dynamic_D.porxy;import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.Arrays;
import java.util.Date;public class ObjectProxyFactory {public static <T>T createProxy(T t){return (T)Proxy.newProxyInstance(t.getClass().getClassLoader(),t.getClass().getInterfaces(),new THandler(t));}private static class THandler<T> implements InvocationHandler {private T t;public THandler(T t) {this.t = t;}@Overridepublic Object invoke(Object proxy, Method method, Object[] args) throws Throwable {System.out.println("==============="+method.getName()+"===============");long time = new Date().getTime();Object invoke = method.invoke(t, args);long time1 = new Date().getTime();System.out.println("参数："+ Arrays.toString(args));System.out.println("结果：\n"+invoke);System.out.println(method.getName()+"()用时："+(time1-time));return invoke;}}
}

最后就是运行测试了（步骤3）：

创建一个测试类（必需依赖：spring-context,spring-test）：

package com.czh.dynamic_D.porxy;import com.czh.dynamic_D.entity.Manager;
import com.czh.dynamic_D.mapper.ManagerMapper;
import com.czh.dynamic_D.mapper.impl.ManagerMapperImpl;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;@ContextConfiguration("classpath:spring-config.xml")
@RunWith(SpringJUnit4ClassRunner.class)
public class ObjectProxyFactoryTest {@Qualifier("managerMapperImpl")@Autowiredprivate ManagerMapper mapper;@Testpublic void test1(){ManagerMapper proxy = ObjectProxyFactory.createProxy(mapper);proxy.selectAll();proxy.selectOneManager("list");Manager m = new Manager();m.setName("葫芦侠客");m.setAge(23);m.setPassword("123qwe");m.setRname("胡图图One");m.setSex("男");m.setTel("18767789980");proxy.insertManager(m);Manager mana1 = proxy.selectOneManager("葫芦侠客");mana1.setPassword("123456");mana1.setRname("Java初学者");proxy.updateManagerTwo(mana1);}}

运行结果：

"C:\Program Files\Java\jdk1.8.0_201\bin\java.exe" -ea -Didea.test.cyclic.buffer.size=1048576 "-javaagent:D:\Users\admin\IntelliJ IDEA 2022.1.3\lib\idea_rt.jar=11894:D:\Users\admin\IntelliJ IDEA 2022.1.3\bin" -Dfile.encoding=UTF-8 -classpath "D:\Users\admin\IntelliJ IDEA 2022.1.3\lib\idea_rt.jar;D:\Users\admin\IntelliJ IDEA 2022.1.3\plugins\junit\lib\junit5-rt.jar;D:\Users\admin\IntelliJ IDEA 2022.1.3\plugins\junit\lib\junit-rt.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\rt.jar;D:\homework\SpringStudy\spring-0722\target\test-classes;D:\homework\SpringStudy\spring-0722\target\classes;D:\Users\admin\apache-maven-3.8.1\repository\junit\junit\4.13.2\junit-4.13.2.jar;D:\Users\admin\apache-maven-3.8.1\repository\org\hamcrest\hamcrest-core\1.3\hamcrest-core-1.3.jar;D:\Users\admin\apache-maven-3.8.1\repository\cglib\cglib\3.3.0\cglib-3.3.0.jar;D:\Users\admin\apache-maven-3.8.1\repository\org\ow2\asm\asm\7.1\asm-7.1.jar;D:\Users\admin\apache-maven-3.8.1\repository\org\mybatis\mybatis\3.5.9\mybatis-3.5.9.jar;D:\Users\admin\apache-maven-3.8.1\repository\mysql\mysql-connector-java\8.0.27\mysql-connector-java-8.0.27.jar;D:\Users\admin\apache-maven-3.8.1\repository\com\google\protobuf\protobuf-java\3.11.4\protobuf-java-3.11.4.jar;D:\Users\admin\apache-maven-3.8.1\repository\org\projectlombok\lombok\1.18.24\lombok-1.18.24.jar;D:\Users\admin\apache-maven-3.8.1\repository\org\springframework\spring-context\5.3.20\spring-context-5.3.20.jar;D:\Users\admin\apache-maven-3.8.1\repository\org\springframework\spring-aop\5.3.20\spring-aop-5.3.20.jar;D:\Users\admin\apache-maven-3.8.1\repository\org\springframework\spring-beans\5.3.20\spring-beans-5.3.20.jar;D:\Users\admin\apache-maven-3.8.1\repository\org\springframework\spring-core\5.3.20\spring-core-5.3.20.jar;D:\Users\admin\apache-maven-3.8.1\repository\org\springframework\spring-jcl\5.3.20\spring-jcl-5.3.20.jar;D:\Users\admin\apache-maven-3.8.1\repository\org\springframework\spring-expression\5.3.20\spring-expression-5.3.20.jar;D:\Users\admin\apache-maven-3.8.1\repository\org\springframework\spring-test\5.3.20\spring-test-5.3.20.jar;D:\Users\admin\apache-maven-3.8.1\repository\log4j\log4j\1.2.17\log4j-1.2.17.jar;D:\Users\admin\apache-maven-3.8.1\repository\com\alibaba\druid\1.2.11\druid-1.2.11.jar;D:\Users\admin\apache-maven-3.8.1\repository\org\springframework\spring-orm\5.3.20\spring-orm-5.3.20.jar;D:\Users\admin\apache-maven-3.8.1\repository\org\springframework\spring-jdbc\5.3.20\spring-jdbc-5.3.20.jar;D:\Users\admin\apache-maven-3.8.1\repository\org\springframework\spring-tx\5.3.20\spring-tx-5.3.20.jar;D:\Users\admin\apache-maven-3.8.1\repository\org\mybatis\mybatis-spring\2.0.7\mybatis-spring-2.0.7.jar" com.intellij.rt.junit.JUnitStarter -ideVersion5 -junit4 com.czh.dynamic_D.porxy.ObjectProxyFactoryTest,test1
七月 24, 2022 7:55:31 下午 org.springframework.test.context.support.AbstractTestContextBootstrapper getDefaultTestExecutionListenerClassNames
信息: Loaded default TestExecutionListener class names from location [META-INF/spring.factories]: [org.springframework.test.context.web.ServletTestExecutionListener, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener, org.springframework.test.context.event.ApplicationEventsTestExecutionListener, org.springframework.test.context.support.DependencyInjectionTestExecutionListener, org.springframework.test.context.support.DirtiesContextTestExecutionListener, org.springframework.test.context.transaction.TransactionalTestExecutionListener, org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener, org.springframework.test.context.event.EventPublishingTestExecutionListener]
七月 24, 2022 7:55:31 下午 org.springframework.test.context.support.AbstractTestContextBootstrapper getTestExecutionListeners
信息: Using TestExecutionListeners: [org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener@5025a98f, org.springframework.test.context.event.ApplicationEventsTestExecutionListener@49993335, org.springframework.test.context.support.DependencyInjectionTestExecutionListener@20322d26, org.springframework.test.context.support.DirtiesContextTestExecutionListener@192b07fd, org.springframework.test.context.transaction.TransactionalTestExecutionListener@64bfbc86, org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener@64bf3bbf, org.springframework.test.context.event.EventPublishingTestExecutionListener@55d56113]
===============selectAll===============INFO 2022-07-24 19:55:33,200 com.alibaba.druid.pool.DruidDataSource: {dataSource-1} inited
参数：null
结果：
[Manager(id=1, name=admin, password=123456, rname=超级管理员, sex=无, age=100, tel=111099898), Manager(id=2, name=list, password=123456, rname=李四, sex=男, age=18, tel=12246779988), Manager(id=3, name=mary, password=123qwe, rname=玛丽亚。。, sex=男, age=21, tel=13566567876), Manager(id=4, name=lis, password=666666, rname=阿贾克斯One, sex=女, age=null, tel=17767879908), Manager(id=5, name=102, password=666666, rname=特斯拉.。。, sex=男, age=null, tel=13455456545), Manager(id=6, name=103, password=666666, rname=电大大师傅大师傅, sex=男, age=null, tel=13455456545), Manager(id=7, name=葫芦侠, password=123456, rname=胡图图, sex=男, age=23, tel=18767789980)]
selectAll()用时：526
===============selectOneManager===============
参数：[list]
结果：
Manager(id=2, name=list, password=123456, rname=李四, sex=男, age=18, tel=12246779988)
selectOneManager()用时：4
===============selectOneManager===============
参数：[葫芦侠]
结果：
Manager(id=7, name=葫芦侠, password=123456, rname=胡图图, sex=男, age=23, tel=18767789980)
selectOneManager()用时：3
===============updateManagerTwo===============
参数：[Manager(id=7, name=葫芦侠, password=123456, rname=胡图图, sex=男, age=23, tel=18767789980)]
结果：
1
updateManagerTwo()用时：2INFO 2022-07-24 19:55:33,549 com.alibaba.druid.pool.DruidDataSource: {dataSource-1} closing ...INFO 2022-07-24 19:55:33,562 com.alibaba.druid.pool.DruidDataSource: {dataSource-1} closedProcess finished with exit code 0

总结：这是我的第一篇笔记，还存在许多不足希望得到大家的指正，可用作参考，互相学习，谢谢！！

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