maven学习5 构建MyBatis项目

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）