配置方式生成mybatis****

导入依赖

4个依赖包：

log4j
mybatis
mybatis-generator-core
mysql-connector-java

<!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.5</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.6</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.21</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/log4j/log4j -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>

mbg.xml配置文件

配置方式生成mybatis****

<?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="DB2Tables" targetRuntime="MyBatis3">
        <!--生成没有注释的代码-->
        <commentGenerator>
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>
        
		//配置mysql的连接信息
        <jdbcConnection
                driverClass="com.mysql.jdbc.Driver"
                connectionURL="jdbc:mysql://localhost:3306/ssm_crud"
                userId="root"
                password="root">
        </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>

        <!--指定entity生成的位置-->
        <javaModelGenerator
                targetPackage="cn.zhang.entity"
                targetProject="G:\idea\WorkPlaces\CSDN\SpringMVC\src\main\java">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>

        <!--指定sql映射文件生成的位置-->
        <sqlMapGenerator
                targetPackage="mapper"
                targetProject="G:\idea\WorkPlaces\CSDN\SpringMVC\src\main\Resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>

        <!--指定dao接口生成的位置，mapper接口-->
        <javaClientGenerator
                type="XMLMAPPER"
                targetPackage="cn.zhang.dao"
                targetProject="G:\idea\WorkPlaces\CSDN\SpringMVC\src\main\java">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>

        <!--指定每个表的生成策略-->
        <table tableName="tbl_emp" domainObjectName="Employee"/>
        <table tableName="tbl_dept" domainObjectName="Department"/>
    </context>
</generatorConfiguration>

MbgTest.java：

在执行代码之前首先要确定是否数据库中有已创建好的表，及是否与mbg.xml的配置对应
其次看是否已经在工程中建好了一个目录（mapper）,两个包（dao,entity）
确认完毕后执行代码。

配置方式生成mybatis****

package cn.zhang.test;

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;

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

public class MbgTest {
    public static void main(String[] args) throws Exception{
        List<String> warnings = new ArrayList<>();
        boolean overwrite = true;
        File configFile = new File("G:\\idea\\WorkPlaces\\CSDN\\SpringMVC\\mbg.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);
    }
}

效果图

配置方式生成mybatis****