详解MyBatis逆向工程

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
 PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
 "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">

<generatorConfiguration>
  <context id="testTables" targetRuntime="MyBatis3">
    <commentGenerator>
      <!-- 是否去除自动生成的注释 true：是 ： false:否 -->
      <property name="suppressAllComments" value="true" />
    </commentGenerator>
    <!--数据库连接的信息：驱动类、连接地址、用户名、密码 -->
    <jdbcConnection driverClass="com.mysql.jdbc.Driver"
      connectionURL="jdbc:mysql://localhost:3306/mybatis" userId="root"
      password="123">
    </jdbcConnection>
    <!-- <jdbcConnection driverClass="oracle.jdbc.OracleDriver"
      connectionURL="jdbc:oracle:thin:@127.0.0.1:1521:yycg" 
      userId="yycg"
      password="yycg">
    </jdbcConnection> -->

    <!-- 默认false，把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer，为 true时把JDBC DECIMAL 和 
      NUMERIC 类型解析为java.math.BigDecimal -->
    <javaTypeResolver>
      <property name="forceBigDecimals" value="false" />
    </javaTypeResolver>

    <!-- targetProject:生成PO类的位置 -->
    <javaModelGenerator targetPackage="cn.zm.mybatis.po"
      targetProject=".\src">
      <!-- enableSubPackages:是否让schema作为包的后缀 -->
      <property name="enableSubPackages" value="false" />
      <!-- 从数据库返回的值被清理前后的空格 -->
      <property name="trimStrings" value="true" />
    </javaModelGenerator>
    <!-- targetProject:mapper映射文件生成的位置 -->
    <sqlMapGenerator targetPackage="cn.zm.mybatis.mapper"
      targetProject=".\src">
      <!-- enableSubPackages:是否让schema作为包的后缀 -->
      <property name="enableSubPackages" value="false" />
    </sqlMapGenerator>
    <!-- targetPackage：mapper接口生成的位置 -->
    <javaClientGenerator type="XMLMAPPER"
      targetPackage="cn.zm.mybatis.mapper"
      targetProject=".\src">
      <!-- enableSubPackages:是否让schema作为包的后缀 -->
      <property name="enableSubPackages" value="false" />
    </javaClientGenerator>
    <!-- 指定数据库表 -->
    <table tableName="items"></table>
    <!-- <table tableName="orders"></table>
    <table tableName="orderdetail"></table>
    <table tableName="user"></table>-->
    <!-- <table schema="" tableName="sys_user"></table>
    <table schema="" tableName="sys_role"></table>
    <table schema="" tableName="sys_permission"></table>
    <table schema="" tableName="sys_user_role"></table>
    <table schema="" tableName="sys_role_permission"></table> -->

    <!-- 有些表的字段需要指定java类型
     <table schema="" tableName="">
      <columnOverride column="" javaType="" />
    </table> -->
  </context>
</generatorConfiguration>

public class ItemsMapperTest {
  private ApplicationContext applicationContext;
  private ItemsMapper itemsMapper;

  @Before
  public void setUp() throws Exception {
    applicationContext = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
    itemsMapper = (ItemsMapper) applicationContext.getBean("itemsMapper");
  }

  //根本主键删除
  @Test
  public void deleteByPrimaryKey() {
    itemsMapper.deleteByPrimaryKey(4);
  }

  @Test
  public void insert() {
  }

  @Test
  public void selectByExample() {
    ItemsExample itemsExample = new ItemsExample();
    ItemsExample.Criteria criteria = itemsExample.createCriteria();
    //使用criteria自定义查询条件
    criteria.andNameEqualTo("水杯");
    criteria.andIdEqualTo(1);

    List<Items> list = itemsMapper.selectByExample(itemsExample);
    System.out.println(list);
  }

  @Test
  public void selectByPrimaryKey() {
    Items items = itemsMapper.selectByPrimaryKey(1);
    System.out.println(items);
  }

  @Test
  public void updateByPrimaryKey() {
  }
}