mybatis开发流程及测试

1.创建maven工程（jar包），添加相关依赖：mybatis、mysql驱动、junit、log4j

<dependencies>

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.1.1</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>

    </dependencies>

2.添加相关配置文件：

2.1核心配置文件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>

 <properties resource="config.properties"></properties>
 
 <typeAliases>
    <package name="com.curry.beans"/>
 </typeAliases>

 
  <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>
 
  <mappers>
    <package name="com.curry.dao"/>
  </mappers>
  
  
</configuration>

2.2log4j

2.3数据库连接信息配置文件config.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/kkb
jdbc.username=root
jdbc.password=123456

3.添加实体映射类

package com.curry.beans;

public class Dept {

    private Integer deptNo;

    private String dname;

    private String loc;

    public Integer getDeptNo() {
        return deptNo;
    }

    public void setDeptNo(Integer deptNo) {
        this.deptNo = deptNo;
    }

    public String getDname() {
        return dname;
    }

    public void setDname(String dname) {
        this.dname = dname;
    }

    public String getLoc() {
        return loc;
    }

    public void setLoc(String loc) {
        this.loc = loc;
    }

}

4.添加sql映射文件

<?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.curry.dao.DeptMapper">

    <select id="selectDeptByDeptNo" resultType="Dept">
        select * from dept where DEPTNO = #{deptNo}
    </select>
   
</mapper>

5.测试类

public class TestMybatis {
    private SqlSession session;

    @Before
    public void start() {
        try {
            InputStream inputStream = Resources.getResourceAsStream("myBatis-config.xml");
            SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(inputStream);
            session = factory.openSession();
        } catch (Exception exception) {
            exception.printStackTrace();
        }
    }

    @Test
    public void test01() {
        DeptMapper dao = session.getMapper(DeptMapper.class);
        Dept dept = dao.selectDeptByDeptNo(10);
        System.out.println(dept.getDname() + "======" + dept.getLoc());
    }

}