（八）- 构建MyBatis项目-Maven学习之旅

在这里，写一下，怎么使用Maven构建MyBatis项目。

1. 新建一个Web项目

可以参考前面的博客

2. 修改pom.xml，添加MyBatis依赖

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.deppon.demo</groupId>
  <artifactId>test05</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>test05 Maven Webapp</name>
  <url>http://maven.apache.org</url>
  
  <!-- 属性配置 -->
  <properties>
      <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>
  
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.10</version>
      <scope>test</scope>
    </dependency>
    
    <!-- 添加MyBatis依赖 -->
    <dependency>
	    <groupId>org.mybatis</groupId>
	    <artifactId>mybatis</artifactId>
	    <version>3.1.1</version>
	</dependency>
	
	<dependency>
		<groupId>log4j</groupId>
		<artifactId>log4j</artifactId>
		<version>1.2.16</version>
	</dependency>
	
	<dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>1.6.1</version>
	</dependency>
	
	<dependency>
	    <groupId>org.slf4j</groupId>
	    <artifactId>slf4j-nop</artifactId>
	    <version>1.6.4</version>
	</dependency>
	
  </dependencies>
  
  <build>
    <finalName>test05</finalName>
  </build>
</project>

3. 添加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>
    <!-- 全局别名设置，在映射文件中只需写别名，而不必写出整个类路径  -->
    <typeAliases>  
         <typeAlias type="com.deppon.test05.entity.PersonEntity" alias="PersonEntity"/>
    </typeAliases> 
    
	<environments default="development">
		<environment id="development">
			<transactionManager type="JDBC" />
			<dataSource type="POOLED">
				<property name="driver" value="com.microsoft.sqlserver.jdbc.SQLServerDriver" />
				<property name="url" value="jdbc:sqlserver://localhost:1433;DatabaseName=Demo" />
				<property name="username" value="ygy" />
				<property name="password" value="shishi" />
			</dataSource>
		</environment>
	</environments>

	<mappers>
		<mapper resource="com/deppon/test05/mapper/PersonEntityMapper.xml" />
	</mappers>

</configuration>

PersonEntityMapper.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 namespace="com.deppon.test05.mapper.PersonEntityMapper">

	<!-- 查询所有用户 -->
	<select id="queryAll" resultType="PersonEntity" >
		select * from t_person
	</select>
	
	<!-- 插入一条记录 -->
	<insert id="insert" parameterType="PersonEntity">
		insert into t_person(id , name) values(#{id} , #{name})
	</insert>
	
</mapper>

IPersonEntityDao.java

package com.deppon.test05.dao;

import java.util.List;

import com.deppon.test05.entity.PersonEntity;

public interface IPersonEntityDao {
	/**
	 * 插入一条记录
	 * @param person
	 */
	public void insert(PersonEntity person);
	
	/**
	 * 查询所有记录
	 * @return
	 */
	public List<PersonEntity> queryAll();
}

PersonEntityDao.java

package com.deppon.test05.dao.impl;

import java.util.List;

import org.apache.ibatis.session.SqlSession;

import com.deppon.test05.dao.IPersonEntityDao;
import com.deppon.test05.entity.PersonEntity;
import com.deppon.test05.util.MyBatisUtil;

public class PersonEntityDao implements IPersonEntityDao {
	public static final String NAMESPACE = "com.deppon.test05.mapper.PersonEntityMapper";
	
	@Override
	public void insert(PersonEntity person) {
		SqlSession session = MyBatisUtil.getSession();
		session.insert(NAMESPACE + ".insert" , person);
		
		session.commit();
		session.close();
	}

	@Override
	public List<PersonEntity> queryAll() {
		SqlSession session = MyBatisUtil.getSession();
		List<PersonEntity> personList = session.selectList(NAMESPACE + ".queryAll");
		
		
		session.commit();
		session.close();
		
		return personList;
	}

}

PersonEntity.java

package com.deppon.test05.entity;

public class PersonEntity implements java.io.Serializable {
	private static final long serialVersionUID = -1138245964662330288L;

	private Integer id;
	private String name;

	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;
	}

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

MyBatisUtil.java

package com.deppon.test05.util;

import java.io.IOException;
import java.io.InputStream;

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

public class MyBatisUtil {
	private static SqlSessionFactory factory = null;
	
	private static void initialFactory() {
		String resource = "mybatis-config.xml";
		try {
			InputStream in = Resources.getResourceAsStream(resource);
			factory = new SqlSessionFactoryBuilder().build(in);
		} catch (IOException e) {
			e.printStackTrace();
		}
		
	}
	
	public static SqlSession getSession() {
		if(factory == null) {
			initialFactory();
		}
		
		return factory.openSession();
	}
}

测试程序：

package com.deppon.test05.dao;

import java.util.List;

import org.junit.Before;
import org.junit.Test;

import com.deppon.test05.dao.impl.PersonEntityDao;
import com.deppon.test05.entity.PersonEntity;

public class PersonEntityDaoTest {
	private IPersonEntityDao personEntityDao;
	
	@Before
	public void before() {
		personEntityDao = new PersonEntityDao();
	}
	
	@Test
	public void testQueryAll() {
		List<PersonEntity> personList = personEntityDao.queryAll();
		
		for(PersonEntity each : personList) {
			System.out.println(each);
		}
	}
	
	@Test
	public void testInsert() {
		PersonEntity person = new PersonEntity();
		person.setId(200);
		person.setName("乔巴");
		
		personEntityDao.insert(person);
	}
}

项目结构如下图所示：

注意：记得那两条命令哦，亲
（前面的博客有）

结果: