<?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="mysql">

      </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.itcast.ssm.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.itcast.ssm.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.itcast.ssm.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>

   </context>

</generatorConfiguration>

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.exception.XMLParserException;
import org.mybatis.generator.internal.DefaultShellCallback;

public class GeneratorSqlmap {

    public void generator() throws Exception{

        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;
        //指定 逆向工程配置文件
        File configFile = new File("generatorConfig.xml"); 
        ConfigurationParser cp = new ConfigurationParser(warnings);
        Configuration config = cp.parseConfiguration(configFile);
        DefaultShellCallback callback = new DefaultShellCallback(overwrite);
        MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config,
                callback, warnings);
        myBatisGenerator.generate(null);

    } 
    public static void main(String[] args) throws Exception {
        try {
            GeneratorSqlmap generatorSqlmap = new GeneratorSqlmap();
            generatorSqlmap.generator();
        } catch (Exception e) {
            e.printStackTrace();
        }
        
    }

}

//自定义条件查询

   @Test

   public void testSelectByExample() {

      ItemsExample itemsExample = new ItemsExample();

      //通过criteria构造查询条件

      ItemsExample.Criteria criteria = itemsExample.createCriteria();

      criteria.andNameEqualTo("笔记本3");

      //可能返回多条记录

      List<Items> list = itemsMapper.selectByExample(itemsExample);

      System.out.println(list);

   }

 

   //根据主键查询

   @Test

   public void testSelectByPrimaryKey() {

      Items items = itemsMapper.selectByPrimaryKey(1);

      System.out.println(items);

   }

 

 

//插入

   @Test

   public void testInsert() {

      //构造 items对象

      Items items = new Items();

      items.setName("手机");

      items.setPrice(999f);

      itemsMapper.insert(items);

   }

 

//更新数据

   @Test

   public void testUpdateByPrimaryKey() {

     

      //对所有字段进行更新，需要先查询出来再更新

      Items items = itemsMapper.selectByPrimaryKey(1);

      items.setName("水杯");

   

      itemsMapper.updateByPrimaryKey(items);

      //如果传入字段不空为才更新，在批量更新中使用此方法，不需要先查询再更新

      //itemsMapper.updateByPrimaryKeySelective(record);

     

   }