MyBatis之MyBatis环境搭建

Posted 勇闯天涯zfc

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MyBatis之MyBatis环境搭建

一、MyBatis开发环境搭建
1.引入Jar包

  ①MyBatis

    mybatis-3.4.1.jar
    ant-1.9.6.jar
    ant-launcher-1.9.6.jar
    asm-5.1.jar
    cglib-3.2.4.jar
    commons-logging-1.2.jar
    javassist-3.21.0-GA.jar
    log4j-1.2.17.jar
    log4j-api-2.3.jar
    log4j-core-2.3.jar
    ognl-3.1.12.jar
    slf4j-api-1.7.22.jar
    slf4j-log4j12-1.7.22.jar

  ②mysql
    mysql-connector-java-5.1.7-bin.jar

 

2.创建配置文件:mybatis_config.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" />
      <!-- 配置数据源:链接池 -->
      <dataSource type="POOLED">
        <property name="driver" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/mybatis_01" />
        <property name="username" value="root" />
        <property name="password" value="root" />
      </dataSource>
    </environment>
  </environments>
  <!-- 注册映射文件 -->
  <mappers>
    <mapper resource="cn/com/zfc/model/UserMapper.xml" />
  </mappers>
</configuration>

3.创建实体类:User.java

package cn.com.zfc.model;

/**
*
* @title User
* @describe User 模型类 Model 层
* @author 张富昌
* @date 2017年2月25日上午11:42:11
*/
public class User {
  private Integer id;
  private String name;
  private String sex;

  public User(Integer id, String name, String sex) {
    super();
    this.id = id;
    this.name = name;
    this.sex = sex;
  }

  public User() {
    super();
  }

  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 String getSex() {
    return sex;
  }

  public void setSex(String sex) {
    this.sex = sex;
  }

  @Override
  public String toString() {
    return "User [id=" + id + ", name=" + name + ", sex=" + sex + "]";
  }

}

4.创建映射文件:UserMapper.xml

<?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:映射文件,namespace:命名空间 -->
<mapper namespace="cn.com.zfc.model.UserMapper">
  <!-- 查询一个 User 对象 -->
  <!-- parameterType:参数类型,resultType:返回结果类型 -->
  <select id="getOne" parameterType="java.lang.Integer" resultType="cn.com.zfc.model.User">
    select *
    from user
    where
    id=#{id}
  </select>
</mapper>

二、基本使用流程
1、获取 InputStream 对象,加载 Mybatis 配置文件 
  InputStream inputStream = Test01.class.getClassLoader().getResourceAsStream("mybatis_config.xml");
2、创建 SqlSessionFactoryBuilder,用来获取 SqlSessionFactory 对象 
  SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();
3、获取 SqlSessionFactory 对象
  SqlSessionFactory sqlSessionFactory = sqlSessionFactoryBuilder.build(inputStream);
4、获取 SqlSession 对象
  SqlSession sqlSession = sqlSessionFactory.openSession();
5、定义 statement 
  String statement = "cn.com.zfc.model.UserMapper.getOne";
6、执行查询语句 
  User user = sqlSession.selectOne(statement, 1);
  System.out.println("User:" + user);
7、提交事务 
  sqlSession.commit();
8、关闭 Session 
  sqlSession.close();

三、测试MyBatis环境:TestMyBatis.java

package cn.com.zfc.test;

import java.io.InputStream;

import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import cn.com.zfc.model.User;

/**
*
* @title TestMyBatis
* @describe 测试 Mybatis
* @author 张富昌
* @date 2017年2月25日下午4:18:15
*/
public class TestMyBatis {
  public static void main(String[] args) {
    /* 1、获取 InputStream 对象,加载 Mybatis 配置文件 */
    InputStream inputStream = TestMyBatis.class.getClassLoader().getResourceAsStream("mybatis_config.xml");
    /* 2、创建 SqlSessionFactoryBuilder,用来获取 SqlSessionFactory 对象 */
    SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();
    /* 3、获取 SqlSessionFactory 对象 */
    SqlSessionFactory sqlSessionFactory = sqlSessionFactoryBuilder.build(inputStream);
    /* 4、获取 SqlSession 对象 */
    SqlSession sqlSession = sqlSessionFactory.openSession();
    /* 5、定义 statement */
    String statement = "cn.com.zfc.model.UserMapper.getOne";
    /* 6、执行查询语句 */
    User user = sqlSession.selectOne(statement, 1);
    System.out.println("User:" + user);
    /* 7、提交事务 */
    sqlSession.commit();
    /* 8、关闭 Session */
    sqlSession.close();
  }
}

 





























































































































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