【Mybatis】Idea中设置核心配置文件、映射文件的模板，获取SQLSession工具类

1.核心配置文件模板

<?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>
    <properties resource = "jdbc.properties"/>
    <!--别名-->
    <typeAliases>
        <package name="com.pxk.pojo"/>
    </typeAliases>
    <!--设置连接数据库的环境-->
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="${jdbc.driver}"/>
                <property name="url"
                          value="${jdbc.url}"/>
                <property name="username" value="${jdbc.username}"/>
                <property name="password" value="${jdbc.password}"/>
            </dataSource>
        </environment>
    </environments>
    <!--引入映射文件-->
    <mappers>
        <package name=""/>
    </mappers>
</configuration>

（1）打开设置，按一下步骤创建模板，把核心配置文件复制进去

（2）使用

2.映射文件模板

<?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">
<mapper namespace="">
 
</mapper>

（1）设置模板

（2）使用

3.获取sqlSession的工具类

package com.pxk.utils;
 
public class SqlSessionUtils {
    public static SqlSession getSqlSession() {
        SqlSession sqlSession = null;
        try {
            InputStream is = Resources.getResourceAsStream("mybatis-config.xml");
            SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();
            SqlSessionFactory sqlSessionFactory = sqlSessionFactoryBuilder.build(is);
            sqlSession = sqlSessionFactory.openSession(true);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return sqlSession;
    }
}

（1）测试

public class TestSqlSessionUtils {
    @Test
    public void parameterMapper(){
        SqlSession sqlSession = SqlSessionUtils.getSqlSession();
        ParameterMapper mapper = sqlSession.getMapper(ParameterMapper.class);
        List<User> users = mapper.getAllUser();
        users.forEach(user -> System.out.println(user));
    }
}