<?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>
    <!--数据库驱动-->
	<!--
		如果IDE(eclipse或者idea) 项目里导入了jar包，那么就不需要配置了jar包的绝对路径了
	     <classPathEntry    location="e:/project/mybatis/lib/mysql-connector-java-5.0.8-bin.jar"/> 
	-->
    <context id="DB2Tables"    targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressDate" value="true"/>
            <property name="suppressAllComments" value="false"/>
        </commentGenerator>
        <!--数据库链接地址账号密码-->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost/how2java" userId="root" password="admin">
        </jdbcConnection>
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>
        <!--生成Model类存放位置-->
        <javaModelGenerator targetPackage="com.how2java.pojo" targetProject="src">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>
        <!--生成映射文件存放位置-->
        <sqlMapGenerator targetPackage="com.how2java.pojo" targetProject="src">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>
        <!--生成Dao类存放位置-->
        
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.how2java.mapper" targetProject="src">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>
        <!--生成对应表及类名-->
        <table tableName="category_" domainObjectName="Category" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="true" selectByExampleQueryId="false">
            <property name="my.isgen.usekeys" value="true"/>
            <generatedKey column="id" sqlStatement="JDBC"/>        
        </table>
<!--         <table tableName="product_" domainObjectName="Product" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table> -->
    </context>
</generatorConfiguration>

package com.how2java;

import java.io.File;
import java.io.InputStream;
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.internal.DefaultShellCallback;

public class TestMybatisGenerator {

    public static void main(String[] args) throws Exception {
        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;
        InputStream is= TestMybatisGenerator.class.getClassLoader().getResource("generatorConfig.xml").openStream();
        ConfigurationParser cp = new ConfigurationParser(warnings);
        Configuration config = cp.parseConfiguration(is);
        is.close();
        DefaultShellCallback callback = new DefaultShellCallback(overwrite);
        MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
        myBatisGenerator.generate(null);
        System.out.println("生成代码成功，刷新项目，查看文件,然后执行TestMybatis.java");
        
    }
}

package com.how2java;

import java.io.InputStream;
import java.util.List;

//import com.how2java.mapper.CategoryMapper;

//import com.how2java.pojo.Category;
//import com.how2java.pojo.CategoryExample;
//import com.how2java.mapper.CategoryMapper;
//import com.how2java.pojo.CategoryExample;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import com.how2java.mapper.CategoryMapper;
import com.how2java.pojo.Category;
import com.how2java.pojo.CategoryExample;

public class TestMybatis {
    public static void main(String args[]) throws Exception {
        System.out.println("先运行TestMybatisGenerator创建mapper,pojo,xml 等文件，然后取消import里被注释的，以及接下来的注释，并执行代码");

//
        String resource = "mybatis-config.xml";
        InputStream inputStream = Resources.getResourceAsStream(resource);
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
        SqlSession session=sqlSessionFactory.openSession();

        CategoryExample example = new CategoryExample();
        example.createCriteria().andNameLike("%9%");
        CategoryMapper mapper = session.getMapper(CategoryMapper.class);
        List<Category> cs= mapper.selectByExample(example);

        for (Category c : cs) {
            System.out.println(c.getName());
        }

    }
}