32Mybatis_mybatis逆向工程自动生成代码

<?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/mybaits" userId="root"
            password="root">
        </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>
        <!-- <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>

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;
        //鎸囧畾 閫嗗悜宸ョ▼閰嶇疆鏂囦欢
        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();
        }
        
    }

}

package springmvc_mybatis_shen;

import static org.junit.Assert.*;

import java.util.List;

import org.apache.taglibs.standard.lang.jstl.Literal;
import org.aspectj.internal.lang.annotation.ajcDeclareAnnotation;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import cn.itcast.ssm.mapper.ItemsMapper;
import cn.itcast.ssm.po.Items;
import cn.itcast.ssm.po.ItemsExample;

public class TestMap {
    ApplicationContext application=null;
    ItemsMapper itemsMapper=null;
    
@Before
public void setup()
{
    application=new ClassPathXmlApplicationContext("classpath:spring/applicationContext.xml");

itemsMapper=(ItemsMapper)application.getBean("itemsMapper");

}

   //这个自定义查询很常用的
@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);
    
}


}