Mybatis配置Mysql（JAVA）

Mybatis配置Mysql
配置文件
Conf.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">

<configuration>

    <environments default="development">

        <environment id="development">

            <transactionManager type="JDBC" />

            <!-- 配置数据库连接信息 -->

            <dataSource type="POOLED">

                //在mysql 8.0.11以后的版本需要加cj标签，否则会连接失败
                <property name="driver" value="com.mysql.cj.jdbc.Driver" />

                <!--连接数据库，数据库版本mysql 8.0.12-->

                <property name="url" value="jdbc:mysql://localhost:3306/world?useSSL=FALSE &amp; serverTimezone=UTC &amp; allowMultiQueries=true " />

                <property name="username" value="root" />

                <property name="password" value="hik12345+" />

                

                <!--配置连接池-->

                <property name="poolMaximumIdleConnections" value="0"/>

                <property name="poolMaximumActiveConnections" value="1000"/>

                <property name="poolPingQuery" value="SELECT 1 FROM DUAL" />

                <property name="poolPingEnabled" value="true" />

            </dataSource>

        </environment>

    </environments>

    <mappers>

        <!-- 注册mapper.xml文件-->

        <mapper resource="mapper.xml"/>

    </mappers>

</configuration>

Mapper.xml:放在conf同一层目录

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<!-- 为这个mapper指定一个唯一的namespace，namespace的值习惯上设置成包名+sql映射文件名，这样就能够保证namespace的值是唯一的

<mapper namespace="mapper">

    <!-- 在select标签中编写查询的SQL语句，使用parameterType属性指明查询时使用的参数类型，resultType属性指明查询返回的结果集类型

    resultType=" com.bigdata.common.io.OperateMessage "就表示将查询结果封装成一个OperateMessage类的对象返回-->

    <update id="createOperateMessage" parameterType="String">

        CREATE TABLE  IF NOT EXISTS operate_message  (

        messageId INTEGER  AUTO_INCREMENT PRIMARY KEY,

        clusterId varchar(40) not null,

        mainMessage varchar(512) not null,

        operation varchar(40) not null,

        remark varchar(40) not null,

        time varchar(40)

        ) ENGINE=InnoDB AUTO_INCREMENT=43 DEFAULT CHARSET=utf8;

    </update>

    <insert id="insert" parameterType="String">

        INSERT INTO operate_message (clusterId,mainMessage,operation,remark,time)

                    VALUES  (#{clusterId},#{mainMessage},#{operation},#{remark},#{time});

    </insert>

    <select id="getAllMessage" parameterType="String" resultType="com.bigdata.common.io.OperateMessage">

        select * from operate_message;

    </select>

    <select id="getOperateMessageByServiceId" parameterType="String" resultType="com.bigdata.common.io.OperateMessage">

        select * from operate_message where mainMessage like "%"#{mainMessage}"%";

    </select>

    <select id="getOperateMessageByOperate" parameterType="String" resultType="com.bigdata.common.io.OperateMessage">

        select * from operate_message where operation=#{operate};

    </select>



</mapper>

代码

import io.OperateMessage;

import org.apache.ibatis.session.SqlSession;

import org.apache.ibatis.session.SqlSessionFactory;

import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStream;

import java.util.List;

public class Test1 {

    public static void main(String[] args) throws IOException {


        InputStream inStream = new FileInputStream("E:\\\\study\\\\JAVAtest\\\\mysql\\\\mysql_test1\\\\src\\\\main\\\\resources\\\\city-conf.xml");

        //这里是为了测试绝对路径

        //这里也可以用相对路径
        //使用类加载器加载mybatis的配置文件（它也加载关联的映射文件）
        //String resource = "city-conf.xml";//这里放在工程的resources目录下
        //InputStream is = Test1.class.getClassLoader().getResourceAsStream(resource);

        //构建sqlSession的工厂

        SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(inStream);

        //使用MyBatis提供的Resources类加载mybatis的配置文件（它也加载关联的映射文件）

        //Reader reader = Resources.getResourceAsReader(resource); 

        //构建sqlSession的工厂

        //SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(reader);

        //创建能执行映射文件中sql的sqlSession

        SqlSession session = sessionFactory.openSession();

        /**

         * 映射sql的标识字符串，

         * userMapper是userMapper.xml文件中mapper标签的namespace属性的值，

         * getUser是select标签的id属性值，通过select标签的id属性值就可以找到要执行的SQL

         */

//        String statement = "cityMapper.getCity";//映射sql的标识字符串

        String createOperateMessage = "cityMapper.createOperateMessage";//映射sql的标识字符串

        session.update(createOperateMessage);

        //执行查询返回一个唯一user对象的sql

        OperateMessage operateMessage = new OperateMessage();

        operateMessage.setClusterId("test");

        operateMessage.setOperation("test");

        operateMessage.setRemark("test");

        operateMessage.setMainMessage("test");

        operateMessage.setTime("test");

        session.insert("cityMapper.insert",operateMessage);

        session.commit();



        List<Object> objects = session.selectList("cityMapper.getAllMessage");

        System.out.println(objects.toString());


        session.close();


    }

}

运行结果：

[LogMessage{messageId='1', clusterId='LOCALCLUSTER', mainMeesage='SERVICE-WATCHDOG-487d8e5bb5f0427594bcf0d417dbd3a3', operation='start', time='2018-08-13 05:08:39'}, LogMessage{messageId='2', clusterId='LOCALCLUSTER', mainMeesage='SERVICE-ZOOKEEPER-98542d7448e74f7fab10fc70aab97089', operation='start', time='2018-08-13 05:08:53'}, LogMessage{messageId='3', clusterId='LOCALCLUSTER', mainMeesage='SERVICE-ZOOKEEPER-98542d7448e74f7fab10fc70aab97089', operation='start', time='2018-08-13 20:08:52'}, LogMessage{messageId='4', clusterId='LOCALCLUSTER', mainMeesage='SERVICE-ZOOKEEPER-98542d7448e74f7fab10fc70aab97089', operation='start', time='2018-08-13 20:08:53'}, LogMessage{messageId='5', clusterId='test', mainMeesage='test', operation='test', time='test'}, LogMessage{messageId='6', clusterId='test', mainMeesage='test', operation='test', time='test'}, LogMessage{messageId='7', clusterId='test', mainMeesage='test', operation='test', time='test'}, LogMessage{messageId='8', clusterId='test', mainMeesage='test', operation='test', time='test'}]

Mybatis配置Mysql（JAVA）

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