<?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>
	<!-- 引入配置文件 -->
	<!--TODO 修改配置文件对应内容 -->
	<properties resource="c3p0.properties" />
	
	<!-- 指定数据连接驱动jar地址 -->
	<classPathEntry location="${c3p0.jarPath}" />
	
	<!-- 一个数据库一个context -->
	<context id="DB2Tables" targetRuntime="MyBatis3">
        <!-- 这个插件给POJO增加了equals和hashCode方法 -->
        <plugin type="org.mybatis.generator.plugins.EqualsHashCodePlugin"/>
		<commentGenerator>
			<!-- 阻止生成注释 true:没有注释; false:有注释 -->
			<property name="suppressAllComments" value="true" />
			<!-- 阻止生成时间戳 true:没有时间戳; false:有时间戳-->
			<property name="suppressDate" value="true" />
			<!-- 是否  自动为每一个生成的类创建一个构造方法 true:创建构造方法-->
            <property name="constructorBased" value="true"/>
		</commentGenerator>
		
		<!--JDBC连接 -->
		<jdbcConnection 
		driverClass="${c3p0.driverClass}" 
		connectionURL="${c3p0.jdbcUrl}" 
		userId="${c3p0.username}" 
		password="${c3p0.passwords}" />
		
		<!-- 类型转换 -->
		<javaTypeResolver>
			<!--针对Oracle数据库,是否强制转换为BigDecimals类型,若为false则会根据number类型的位数,自动转换为Short(1~4),Integer(5~9),Long(10~18),BigDecimal(18以上)-->
			<property name="forceBigDecimals" value="false" />
		</javaTypeResolver>
		
		<!--生成POJO类的包名和位置 -->
		<!--TODO 修改targetPackage内容 -->
		<javaModelGenerator targetPackage="com.d.pojo" targetProject="${c3p0.targetProject}">
			<!-- 是否在当前路径下新加一层schema eg:fase时:路径是com.d.pojo       true时:路径是com.d.pojo.[schemaName] -->
			<property name="enableSubPackages" value="false" />
			<!-- 是否针对String类型的字段在set的时候进行trim调用 -->
			<property name="trimStrings" value="true" />
		</javaModelGenerator>
		
		<!-- 生成mapper.xml映射文件的包名和位置 -->
		<!--TODO 修改targetPackage内容 -->
		<sqlMapGenerator targetPackage="com.c.mappers" targetProject="${c3p0.targetProject}">
			<!-- 是否在当前路径下新加一层schema eg:fase时:路径是com.d.pojo       true时:路径是com.d.pojo.[schemaName] -->
			<property name="enableSubPackages" value="false" />
		</sqlMapGenerator>
		
		<!-- 生成Mapper接口类的包名和位置 -->
		<!--TODO 修改targetPackage内容 -->
		<javaClientGenerator type="XMLMAPPER" targetPackage="com.c.mappers" targetProject="${c3p0.targetProject}">
			<!-- 是否在当前路径下新加一层schema eg:fase时:路径是com.d.pojo       true时:路径是com.d.pojo.[schemaName] -->
			<property name="enableSubPackages" value="false" />
		</javaClientGenerator>
		
		<!-- 要生成的POJO类和对应的来源表 -->
		<!-- schema=数据库名 tableName=对应的表名 domainObjectName=要生成的POJO类 enable*ByExample 是否生成 example类   -->
		<!--TODO 只需修改前三个即可,后边的都为false(注意单标签和双标签完整性)-->
		<table schema="${c3p0.schema}" tableName="USERS" domainObjectName="Users" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" >
			<!-- 忽略哪(些)列,不生成bean字段 -->
            <!--<ignoreColumn column="U_ID" /> -->
             <!-- 指定哪(些)列的java数据类型 -->
            <!-- <columnOverride column="U_NAME" jdbcType="VARCHAR" /> -->
		</table>
		<table schema="${c3p0.schema}" tableName="BIDSTOCK" domainObjectName="Bidstock" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" />
		<table schema="${c3p0.schema}" tableName="CARS" domainObjectName="Cars" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" />
		<table schema="${c3p0.schema}" tableName="COLOR_PICTURE" domainObjectName="ColorPicture" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" />
		<table schema="${c3p0.schema}" tableName="EXPENSE" domainObjectName="Expense" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" />
		<table schema="${c3p0.schema}" tableName="INSURANCE" domainObjectName="Insurance" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" />
		<table schema="${c3p0.schema}" tableName="PURCHASEHISTORY" domainObjectName="PurchaseHistory" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" />
		<table schema="${c3p0.schema}" tableName="SHOPKEEPERS" domainObjectName="ShopKeepers" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" />
		<table schema="${c3p0.schema}" tableName="STORES" domainObjectName="Stores" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" />
	</context>
</generatorConfiguration>

对应的c3p0.properties为:(这个文件是SSM整合时候导入的配置文件,所以内容不仅只是针对这个帖子用的)

#Mybatis自动生成Mapper,POJO时对应项目(本项目)名 targetProject=项目名/src/main/java
c3p0.targetProject=CarsSalePlatform/src
#schema=数据库名,影响<property name="enableSubPackages" value="false" />
#是否在当前路径下新加一层schema eg:fase时:路径是com.d.pojo       true时:路径是com.d.pojo.[schemaName] 
c3p0.schema=

#mysql数据库连接信息
#c3p0.jarPath=D:/UltimateEclipse/UserLibrary/jdbc-mysql-connector-java-5.1.18-bin.jar
#c3p0.driverClass=com.mysql.jdbc.Driver
#c3p0.jdbcUrl=jdbc:mysql://localhost:3306/test
#c3p0.username=root
#c3p0.passwords=123456

#Oracle数据库连接信息
c3p0.jarPath=D:/UltimateEclipse/UserLibrary/ojdbc14-Oracle-connector.jar
c3p0.driverClass=oracle.jdbc.OracleDriver
c3p0.jdbcUrl=jdbc:oracle:thin:@127.0.0.1:1521:ORCL 
c3p0.username=root
c3p0.passwords=root

#连接池中保留的最大连接数
c3p0.maxPoolSize=20
#最小连接数
c3p0.minPoolSize=5
#初始化时获取5个连接,取值应在minPoolSize与maxPoolSize之间
c3p0.initialPoolSize=5
#连接用完了自动增量5个
c3p0.acquireIncrement=5
#连接失败后重试30次
c3p0.acquireRetryAttempts=30
#两次连接中间隔1000毫秒
c3p0.acquireRetryDelay=1000

四.运行方式→Run Mybatis Generator

运行前目录树结构:

运行后目录树结构

附上生成的User相关的文件代码仅供参考

com.d.pojo/Users.java

package com.d.pojo;

public class Users {
    /**
     *
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database column USERS.U_ID
     *
     * @mbg.generated
     */
    private Integer uId;

    /**
     *
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database column USERS.U_NAME
     *
     * @mbg.generated
     */
    private String uName;

    /**
     *
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database column USERS.U_PASSWORDS
     *
     * @mbg.generated
     */
    private String uPasswords;

    /**
     *
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database column USERS.U_SEX
     *
     * @mbg.generated
     */
    private String uSex;

    /**
     *
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database column USERS.U_TEL
     *
     * @mbg.generated
     */
    private String uTel;

    /**
     *
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database column USERS.U_ADD
     *
     * @mbg.generated
     */
    private String uAdd;

    /**
     *
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database column USERS.U_IMG
     *
     * @mbg.generated
     */
    private String uImg;

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table USERS
     *
     * @mbg.generated
     */
    public Users(Integer uId, String uName, String uPasswords, String uSex, String uTel, String uAdd, String uImg) {
        this.uId = uId;
        this.uName = uName;
        this.uPasswords = uPasswords;
        this.uSex = uSex;
        this.uTel = uTel;
        this.uAdd = uAdd;
        this.uImg = uImg;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table USERS
     *
     * @mbg.generated
     */
    public Users() {
        super();
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method returns the value of the database column USERS.U_ID
     *
     * @return the value of USERS.U_ID
     *
     * @mbg.generated
     */
    public Integer getuId() {
        return uId;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method sets the value of the database column USERS.U_ID
     *
     * @param uId the value for USERS.U_ID
     *
     * @mbg.generated
     */
    public void setuId(Integer uId) {
        this.uId = uId;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method returns the value of the database column USERS.U_NAME
     *
     * @return the value of USERS.U_NAME
     *
     * @mbg.generated
     */
    public String getuName() {
        return uName;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method sets the value of the database column USERS.U_NAME
     *
     * @param uName the value for USERS.U_NAME
     *
     * @mbg.generated
     */
    public void setuName(String uName) {
        this.uName = uName == null ? null : uName.trim();
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method returns the value of the database column USERS.U_PASSWORDS
     *
     * @return the value of USERS.U_PASSWORDS
     *
     * @mbg.generated
     */
    public String getuPasswords() {
        return uPasswords;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method sets the value of the database column USERS.U_PASSWORDS
     *
     * @param uPasswords the value for USERS.U_PASSWORDS
     *
     * @mbg.generated
     */
    public void setuPasswords(String uPasswords) {
        this.uPasswords = uPasswords == null ? null : uPasswords.trim();
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method returns the value of the database column USERS.U_SEX
     *
     * @return the value of USERS.U_SEX
     *
     * @mbg.generated
     */
    public String getuSex() {
        return uSex;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method sets the value of the database column USERS.U_SEX
     *
     * @param uSex the value for USERS.U_SEX
     *
     * @mbg.generated
     */
    public void setuSex(String uSex) {
        this.uSex = uSex == null ? null : uSex.trim();
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method returns the value of the database column USERS.U_TEL
     *
     * @return the value of USERS.U_TEL
     *
     * @mbg.generated
     */
    public String getuTel() {
        return uTel;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method sets the value of the database column USERS.U_TEL
     *
     * @param uTel the value for USERS.U_TEL
     *
     * @mbg.generated
     */
    public void setuTel(String uTel) {
        this.uTel = uTel == null ? null : uTel.trim();
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method returns the value of the database column USERS.U_ADD
     *
     * @return the value of USERS.U_ADD
     *
     * @mbg.generated
     */
    public String getuAdd() {
        return uAdd;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method sets the value of the database column USERS.U_ADD
     *
     * @param uAdd the value for USERS.U_ADD
     *
     * @mbg.generated
     */
    public void setuAdd(String uAdd) {
        this.uAdd = uAdd == null ? null : uAdd.trim();
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method returns the value of the database column USERS.U_IMG
     *
     * @return the value of USERS.U_IMG
     *
     * @mbg.generated
     */
    public String getuImg() {
        return uImg;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method sets the value of the database column USERS.U_IMG
     *
     * @param uImg the value for USERS.U_IMG
     *
     * @mbg.generated
     */
    public void setuImg(String uImg) {
        this.uImg = uImg == null ? null : uImg.trim();
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table USERS
     *
     * @mbg.generated
     */
    @Override
    public boolean equals(Object that) {
        if (this == that) {
            return true;
        }
        if (that == null) {
            return false;
        }
        if (getClass() != that.getClass()) {
            return false;
        }
        Users other = (Users) that;
        return (this.getuId() == null ? other.getuId() == null : this.getuId().equals(other.getuId()))
            && (this.getuName() == null ? other.getuName() == null : this.getuName().equals(other.getuName()))
            && (this.getuPasswords() == null ? other.getuPasswords() == null : this.getuPasswords().equals(other.getuPasswords()))
            && (this.getuSex() == null ? other.getuSex() == null : this.getuSex().equals(other.getuSex()))
            && (this.getuTel() == null ? other.getuTel() == null : this.getuTel().equals(other.getuTel()))
            && (this.getuAdd() == null ? other.getuAdd() == null : this.getuAdd().equals(other.getuAdd()))
            && (this.getuImg() == null ? other.getuImg() == null : this.getuImg().equals(other.getuImg()));
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table USERS
     *
     * @mbg.generated
     */
    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((getuId() == null) ? 0 : getuId().hashCode());
        result = prime * result + ((getuName() == null) ? 0 : getuName().hashCode());
        result = prime * result + ((getuPasswords() == null) ? 0 : getuPasswords().hashCode());
        result = prime * result + ((getuSex() == null) ? 0 : getuSex().hashCode());
        result = prime * result + ((getuTel() == null) ? 0 : getuTel().hashCode());
        result = prime * result + ((getuAdd() == null) ? 0 : getuAdd().hashCode());
        result = prime * result + ((getuImg() == null) ? 0 : getuImg().hashCode());
        return result;
    }
}

com.c.mappers/UsersMapper.java

package com.c.mappers;

import com.d.pojo.Users;

public interface UsersMapper {
    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table USERS
     *
     * @mbg.generated
     */
    int deleteByPrimaryKey(Integer uId);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table USERS
     *
     * @mbg.generated
     */
    int insert(Users record);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table USERS
     *
     * @mbg.generated
     */
    int insertSelective(Users record);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table USERS
     *
     * @mbg.generated
     */
    Users selectByPrimaryKey(Integer uId);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table USERS
     *
     * @mbg.generated
     */
    int updateByPrimaryKeySelective(Users record);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table USERS
     *
     * @mbg.generated
     */
    int updateByPrimaryKey(Users record);
}

com.c.mappers/UsersMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.c.mappers.UsersMapper">
  <resultMap id="BaseResultMap" type="com.d.pojo.Users">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    <constructor>
      <idArg column="U_ID" javaType="java.lang.Integer" jdbcType="DECIMAL" />
      <arg column="U_NAME" javaType="java.lang.String" jdbcType="VARCHAR" />
      <arg column="U_PASSWORDS" javaType="java.lang.String" jdbcType="VARCHAR" />
      <arg column="U_SEX" javaType="java.lang.String" jdbcType="CHAR" />
      <arg column="U_TEL" javaType="java.lang.String" jdbcType="VARCHAR" />
      <arg column="U_ADD" javaType="java.lang.String" jdbcType="VARCHAR" />
      <arg column="U_IMG" javaType="java.lang.String" jdbcType="VARCHAR" />
    </constructor>
  </resultMap>
  <sql id="Base_Column_List">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    U_ID, U_NAME, U_PASSWORDS, U_SEX, U_TEL, U_ADD, U_IMG
  </sql>
  <select id="selectByPrimaryKey" parameterType="java.lang.Integer" resultMap="BaseResultMap">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    select 
    <include refid="Base_Column_List" />
    from USERS
    where U_ID = #{uId,jdbcType=DECIMAL}
  </select>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    delete from USERS
    where U_ID = #{uId,jdbcType=DECIMAL}
  </delete>
  <insert id="insert" parameterType="com.d.pojo.Users">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    insert into USERS (U_ID, U_NAME, U_PASSWORDS, 
      U_SEX, U_TEL, U_ADD, U_IMG
      )
    values (#{uId,jdbcType=DECIMAL}, #{uName,jdbcType=VARCHAR}, #{uPasswords,jdbcType=VARCHAR}, 
      #{uSex,jdbcType=CHAR}, #{uTel,jdbcType=VARCHAR}, #{uAdd,jdbcType=VARCHAR}, #{uImg,jdbcType=VARCHAR}
      )
  </insert>
  <insert id="insertSelective" parameterType="com.d.pojo.Users">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    insert into USERS
    <trim prefix="(" suffix=")" suffixOverrides=",">
      <if test="uId != null">
        U_ID,
      </if>
      <if test="uName != null">
        U_NAME,
      </if>
      <if test="uPasswords != null">
        U_PASSWORDS,
      </if>
      <if test="uSex != null">
        U_SEX,
      </if>
      <if test="uTel != null">
        U_TEL,
      </if>
      <if test="uAdd != null">
        U_ADD,
      </if>
      <if test="uImg != null">
        U_IMG,
      </if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides=",">
      <if test="uId != null">
        #{uId,jdbcType=DECIMAL},
      </if>
      <if test="uName != null">
        #{uName,jdbcType=VARCHAR},
      </if>
      <if test="uPasswords != null">
        #{uPasswords,jdbcType=VARCHAR},
      </if>
      <if test="uSex != null">
        #{uSex,jdbcType=CHAR},
      </if>
      <if test="uTel != null">
        #{uTel,jdbcType=VARCHAR},
      </if>
      <if test="uAdd != null">
        #{uAdd,jdbcType=VARCHAR},
      </if>
      <if test="uImg != null">
        #{uImg,jdbcType=VARCHAR},
      </if>
    </trim>
  </insert>
  <update id="updateByPrimaryKeySelective" parameterType="com.d.pojo.Users">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    update USERS
    <set>
      <if test="uName != null">
        U_NAME = #{uName,jdbcType=VARCHAR},
      </if>
      <if test="uPasswords != null">
        U_PASSWORDS = #{uPasswords,jdbcType=VARCHAR},
      </if>
      <if test="uSex != null">
        U_SEX = #{uSex,jdbcType=CHAR},
      </if>
      <if test="uTel != null">
        U_TEL = #{uTel,jdbcType=VARCHAR},
      </if>
      <if test="uAdd != null">
        U_ADD = #{uAdd,jdbcType=VARCHAR},
      </if>
      <if test="uImg != null">
        U_IMG = #{uImg,jdbcType=VARCHAR},
      </if>
    </set>
    where U_ID = #{uId,jdbcType=DECIMAL}
  </update>
  <update id="updateByPrimaryKey" parameterType="com.d.pojo.Users">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    update USERS
    set U_NAME = #{uName,jdbcType=VARCHAR},
      U_PASSWORDS = #{uPasswords,jdbcType=VARCHAR},
      U_SEX = #{uSex,jdbcType=CHAR},
      U_TEL = #{uTel,jdbcType=VARCHAR},
      U_ADD = #{uAdd,jdbcType=VARCHAR},
      U_IMG = #{uImg,jdbcType=VARCHAR}
    where U_ID = #{uId,jdbcType=DECIMAL}
  </update>
</mapper>

五.附上一个我找到的中文说明文档

转自 Mybatis Generator最完整配置详解文章发布的时候是2015年了,仅供参考

<?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">
<!-- 配置生成器 -->
<generatorConfiguration>
<!-- 可以用于加载配置项或者配置文件,在整个配置文件中就可以使用${propertyKey}的方式来引用配置项
    resource:配置资源加载地址,使用resource,MBG从classpath开始找,比如com/myproject/generatorConfig.properties        
    url:配置资源加载地质,使用URL的方式,比如file:///C:/myfolder/generatorConfig.properties.
    注意,两个属性只能选址一个;
    
    另外,如果使用了mybatis-generator-maven-plugin,那么在pom.xml中定义的properties都可以直接在generatorConfig.xml中使用
<properties resource="" url="" />
 -->
 
 <!-- 在MBG工作的时候,需要额外加载的依赖包
    location属性指明加载jar/zip包的全路径
<classPathEntry location="/Program Files/IBM/SQLLIB/java/db2java.zip" />
  -->
  
<!-- 
    context:生成一组对象的环境 
    id:必选,上下文id,用于在生成错误时提示
    defaultModelType:指定生成对象的样式
        1,conditional:类似hierarchical;
        2,flat:所有内容(主键,blob)等全部生成在一个对象中;
        3,hierarchical:主键生成一个XXKey对象(key class),Blob等单独生成一个对象,其他简单属性在一个对象中(record class)
    targetRuntime:
        1,MyBatis3:默认的值,生成基于MyBatis3.x以上版本的内容,包括XXXBySample;
        2,MyBatis3Simple:类似MyBatis3,只是不生成XXXBySample;
    introspectedColumnImpl:类全限定名,用于扩展MBG
-->
<context id="mysql" defaultModelType="hierarchical" targetRuntime="MyBatis3Simple" >

    <!-- 自动识别数据库关键字,默认false,如果设置为true,根据SqlReservedWords中定义的关键字列表;
        一般保留默认值,遇到数据库关键字(Java关键字),使用columnOverride覆盖
     -->
    <property name="autoDelimitKeywords" value="false"/>
    <!-- 生成的Java文件的编码 -->
    <property name="javaFileEncoding" value="UTF-8"/>
    <!-- 格式化java代码 -->
    <property name="javaFormatter" value="org.mybatis.generator.api.dom.DefaultJavaFormatter"/>
    <!-- 格式化XML代码 -->
    <property name="xmlFormatter" value="org.mybatis.generator.api.dom.DefaultXmlFormatter"/>
    
    <!-- beginningDelimiter和endingDelimiter:指明数据库的用于标记数据库对象名的符号,比如ORACLE就是双引号,MYSQL默认是`反引号; -->
    <property name="beginningDelimiter" value="`"/>
    <property name="endingDelimiter" value="`"/>
    
    <!-- 必须要有的,使用这个配置链接数据库
        @TODO:是否可以扩展
     -->
    <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql:///pss" userId="root" password="admin">
        <!-- 这里面可以设置property属性,每一个property属性都设置到配置的Driver上 -->
    </jdbcConnection>
    
    <!-- java类型处理器 
        用于处理DB中的类型到Java中的类型,默认使用JavaTypeResolverDefaultImpl;
        注意一点,默认会先尝试使用Integer,Long,Short等来对应DECIMAL和 NUMERIC数据类型; 
    -->
    <javaTypeResolver type="org.mybatis.generator.internal.types.JavaTypeResolverDefaultImpl">
        <!-- 
            true:使用BigDecimal对应DECIMAL和 NUMERIC数据类型
            false:默认,
                scale>0;length>18:使用BigDecimal;
                scale=0;length[10,18]:使用Long;
                scale=0;length[5,9]:使用Integer;
                scale=0;length<5:使用Short;
         -->
        <property name="forceBigDecimals" value="false"/>
    </javaTypeResolver>
    
    
    <!-- java模型创建器,是必须要的元素
        负责:1,key类(见context的defaultModelType);2,java类;3,查询类
        targetPackage:生成的类要放的包,真实的包受enableSubPackages属性控制;
        targetProject:目标项目,指定一个存在的目录下,生成的内容会放到指定目录中,如果目录不存在,MBG不会自动建目录
     -->
    <javaModelGenerator targetPackage="com._520it.mybatis.domain" targetProject="src/main/java">
        <!--  for MyBatis3/MyBatis3Simple
            自动为每一个生成的类创建一个构造方法,构造方法包含了所有的field;而不是使用setter;
         -->
        <property name="constructorBased" value="false"/>
        
        <!-- 在targetPackage的基础上,根据数据库的schema再生成一层package,最终生成的类放在这个package下,默认为false -->
        <property name="enableSubPackages" value="true"/>
        
        <!-- for MyBatis3 / MyBatis3Simple
            是否创建一个不可变的类,如果为true,
            那么MBG会创建一个没有setter方法的类,取而代之的是类似constructorBased的类
         -->
        <property name="immutable" value="false"/>
        
        <!-- 设置一个根对象,
            如果设置了这个根对象,那么生成的keyClass或者recordClass会继承这个类;在Table的rootClass属性中可以覆盖该选项
            注意:如果在key class或者record class中有root class相同的属性,MBG就不会重新生成这些属性了,包括:
                1,属性名相同,类型相同,有相同的getter/setter方法;
         -->
        <property name="rootClass" value="com._520it.mybatis.domain.BaseDomain"/>
        
        <!-- 设置是否在getter方法中,对String类型字段调用trim()方法 -->
        <property name="trimStrings" value="true"/>
    </javaModelGenerator>
    
    
    <!-- 生成SQL map的XML文件生成器,
        注意,在Mybatis3之后,我们可以使用mapper.xml文件+Mapper接口(或者不用mapper接口),
            或者只使用Mapper接口+Annotation,所以,如果 javaClientGenerator配置中配置了需要生成XML的话,这个元素就必须配置
        targetPackage/targetProject:同javaModelGenerator
     -->
    <sqlMapGenerator targetPackage="com._520it.mybatis.mapper" targetProject="src/main/resources">
        <!-- 在targetPackage的基础上,根据数据库的schema再生成一层package,最终生成的类放在这个package下,默认为false -->
        <property name="enableSubPackages" value="true"/>
    </sqlMapGenerator>
    
    
    <!-- 对于mybatis来说,即生成Mapper接口,注意,如果没有配置该元素,那么默认不会生成Mapper接口 
        targetPackage/targetProject:同javaModelGenerator
        type:选择怎么生成mapper接口(在MyBatis3/MyBatis3Simple下):
            1,ANNOTATEDMAPPER:会生成使用Mapper接口+Annotation的方式创建(SQL生成在annotation中),不会生成对应的XML;
            2,MIXEDMAPPER:使用混合配置,会生成Mapper接口,并适当添加合适的Annotation,但是XML会生成在XML中;
            3,XMLMAPPER:会生成Mapper接口,接口完全依赖XML;
        注意,如果context是MyBatis3Simple:只支持ANNOTATEDMAPPER和XMLMAPPER
    -->
    <javaClientGenerator targetPackage="com._520it.mybatis.mapper" type="ANNOTATEDMAPPER" targetProject="src/main/java">
        <!-- 在targetPackage的基础上,根据数据库的schema再生成一层package,最终生成的类放在这个package下,默认为false -->
        <property name="enableSubPackages" value="true"/>
        
        <!-- 可以为所有生成的接口添加一个父接口,但是MBG只负责生成,不负责检查
        <property name="rootInterface" value=""/>
         -->
    </javaClientGenerator>
    
    <!-- 选择一个table来生成相关文件,可以有一个或多个table,必须要有table元素
        选择的table会生成一下文件:
        1,SQL map文件
        2,生成一个主键类;
        3,除了BLOB和主键的其他字段的类;
        4,包含BLOB的类;
        5,一个用户生成动态查询的条件类(selectByExample, deleteByExample),可选;
        6,Mapper接口(可选)
    
        tableName(必要):要生成对象的表名;
        注意:大小写敏感问题。正常情况下,MBG会自动的去识别数据库标识符的大小写敏感度,在一般情况下,MBG会
            根据设置的schema,catalog或tablename去查询数据表,按照下面的流程:
            1,如果schema,catalog或tablename中有空格,那么设置的是什么格式,就精确的使用指定的大小写格式去查询;
            2,否则,如果数据库的标识符使用大写的,那么MBG自动把表名变成大写再查找;
            3,否则,如果数据库的标识符使用小写的,那么MBG自动把表名变成小写再查找;
            4,否则,使用指定的大小写格式查询;
        另外的,如果在创建表的时候,使用的""把数据库对象规定大小写,就算数据库标识符是使用的大写,在这种情况下也会使用给定的大小写来创建表名;
        这个时候,请设置delimitIdentifiers="true"即可保留大小写格式;
        
        可选:
        1,schema:数据库的schema;
        2,catalog:数据库的catalog;
        3,alias:为数据表设置的别名,如果设置了alias,那么生成的所有的SELECT SQL语句中,列名会变成:alias_actualColumnName
        4,domainObjectName:生成的domain类的名字,如果不设置,直接使用表名作为domain类的名字;可以设置为somepck.domainName,那么会自动把domainName类再放到somepck包里面;
        5,enableInsert(默认true):指定是否生成insert语句;
        6,enableSelectByPrimaryKey(默认true):指定是否生成按照主键查询对象的语句(就是getById或get);
        7,enableSelectByExample(默认true):MyBatis3Simple为false,指定是否生成动态查询语句;
        8,enableUpdateByPrimaryKey(默认true):指定是否生成按照主键修改对象的语句(即update);
        9,enableDeleteByPrimaryKey(默认true):指定是否生成按照主键删除对象的语句(即delete);
        10,enableDeleteByExample(默认true):MyBatis3Simple为false,指定是否生成动态删除语句;
        11,enableCountByExample(默认true):MyBatis3Simple为false,指定是否生成动态查询总条数语句(用于分页的总条数查询);
        12,enableUpdateByExample(默认true):MyBatis3Simple为false,指定是否生成动态修改语句(只修改对象中不为空的属性);
        13,modelType:参考context元素的defaultModelType,相当于覆盖;
        14,delimitIdentifiers:参考tableName的解释,注意,默认的delimitIdentifiers是双引号,如果类似MYSQL这样的数据库,使用的是`(反引号,那么还需要设置context的beginningDelimiter和endingDelimiter属性)
        15,delimitAllColumns:设置是否所有生成的SQL中的列名都使用标识符引起来。默认为false,delimitIdentifiers参考context的属性
        
        注意,table里面很多参数都是对javaModelGenerator,context等元素的默认属性的一个复写;
     -->
    <table tableName="userinfo" >
        
        <!-- 参考 javaModelGenerator 的 constructorBased属性-->
        <property name="constructorBased" value="false"/>
        
        <!-- 默认为false,如果设置为true,在生成的SQL中,table名字不会加上catalog或schema; -->
        <property name="ignoreQualifiersAtRuntime" value="false"/>
        
        <!-- 参考 javaModelGenerator 的 immutable 属性 -->
        <property name="immutable" value="false"/>
        
        <!-- 指定是否只生成domain类,如果设置为true,只生成domain类,如果还配置了sqlMapGenerator,那么在mapper XML文件中,只生成resultMap元素 -->
        <property name="modelOnly" value="false"/>
        
        <!-- 参考 javaModelGenerator 的 rootClass 属性 
        <property name="rootClass" value=""/>
         -->
         
        <!-- 参考javaClientGenerator 的  rootInterface 属性
        <property name="rootInterface" value=""/>
        -->
        
        <!-- 如果设置了runtimeCatalog,那么在生成的SQL中,使用该指定的catalog,而不是table元素上的catalog 
        <property name="runtimeCatalog" value=""/>
        -->
        
        <!-- 如果设置了runtimeSchema,那么在生成的SQL中,使用该指定的schema,而不是table元素上的schema 
        <property name="runtimeSchema" value=""/>
        -->
        
        <!-- 如果设置了runtimeTableName,那么在生成的SQL中,使用该指定的tablename,而不是table元素上的tablename 
        <property name="runtimeTableName" value=""/>
        -->
        
        <!-- 注意,该属性只针对MyBatis3Simple有用;
            如果选择的runtime是MyBatis3Simple,那么会生成一个SelectAll方法,如果指定了selectAllOrderByClause,那么会在该SQL中添加指定的这个order条件;
         -->
        <property name="selectAllOrderByClause" value="age desc,username asc"/>
        
        <!-- 如果设置为true,生成的model类会直接使用column本身的名字,而不会再使用驼峰命名方法,比如BORN_DATE,生成的属性名字就是BORN_DATE,而不会是bornDate -->
        <property name="useActualColumnNames" value="false"/>
        
        
        <!-- generatedKey用于生成生成主键的方法,
            如果设置了该元素,MBG会在生成的<insert>元素中生成一条正确的<selectKey>元素,该元素可选
            column:主键的列名;
            sqlStatement:要生成的selectKey语句,有以下可选项:
                Cloudscape:相当于selectKey的SQL为: VALUES IDENTITY_VAL_LOCAL()
                DB2       :相当于selectKey的SQL为: VALUES IDENTITY_VAL_LOCAL()
                DB2_MF    :相当于selectKey的SQL为:SELECT IDENTITY_VAL_LOCAL() FROM SYSIBM.SYSDUMMY1
                Derby     :相当于selectKey的SQL为:VALUES IDENTITY_VAL_LOCAL()
                HSQLDB    :相当于selectKey的SQL为:CALL IDENTITY()
                Informix  :相当于selectKey的SQL为:select dbinfo('sqlca.sqlerrd1') from systables where tabid=1
                MySql     :相当于selectKey的SQL为:SELECT LAST_INSERT_ID()
                SqlServer :相当于selectKey的SQL为:SELECT SCOPE_IDENTITY()
                SYBASE    :相当于selectKey的SQL为:SELECT @@IDENTITY
                JDBC      :相当于在生成的insert元素上添加useGeneratedKeys="true"和keyProperty属性
        <generatedKey column="" sqlStatement=""/>
         -->
        
        <!-- 
            该元素会在根据表中列名计算对象属性名之前先重命名列名,非常适合用于表中的列都有公用的前缀字符串的时候,
            比如列名为:CUST_ID,CUST_NAME,CUST_EMAIL,CUST_ADDRESS等;
            那么就可以设置searchString为"^CUST_",并使用空白替换,那么生成的Customer对象中的属性名称就不是
            custId,custName等,而是先被替换为ID,NAME,EMAIL,然后变成属性:id,name,email;
            
            注意,MBG是使用java.util.regex.Matcher.replaceAll来替换searchString和replaceString的,
            如果使用了columnOverride元素,该属性无效;
            
        <columnRenamingRule searchString="" replaceString=""/>
         -->
         
         
         <!-- 用来修改表中某个列的属性,MBG会使用修改后的列来生成domain的属性;
            column:要重新设置的列名;
            注意,一个table元素中可以有多个columnOverride元素哈~
          -->
         <columnOverride column="username">
            <!-- 使用property属性来指定列要生成的属性名称 -->
            <property name="property" value="userName"/>
            
            <!-- javaType用于指定生成的domain的属性类型,使用类型的全限定名
            <property name="javaType" value=""/>
             -->
             
            <!-- jdbcType用于指定该列的JDBC类型 
            <property name="jdbcType" value=""/>
             -->
             
            <!-- typeHandler 用于指定该列使用到的TypeHandler,如果要指定,配置类型处理器的全限定名
                注意,mybatis中,不会生成到mybatis-config.xml中的typeHandler
                只会生成类似:where id = #{id,jdbcType=BIGINT,typeHandler=com._520it.mybatis.MyTypeHandler}的参数描述
            <property name="jdbcType" value=""/>
            -->
            
            <!-- 参考table元素的delimitAllColumns配置,默认为false
            <property name="delimitedColumnName" value=""/>
             -->
         </columnOverride>
         
         <!-- ignoreColumn设置一个MGB忽略的列,如果设置了改列,那么在生成的domain中,生成的SQL中,都不会有该列出现 
            column:指定要忽略的列的名字;
            delimitedColumnName:参考table元素的delimitAllColumns配置,默认为false
            
            注意,一个table元素中可以有多个ignoreColumn元素
         <ignoreColumn column="deptId" delimitedColumnName=""/>
         -->
    </table>
    
</context>

</generatorConfiguration>

ALL BY MedusaSTears

2018.08.14

参考资料:

使用Mybatis-Generator自动生成Dao、Model、Mapping相关文件

mybatis generator configuration file插件使用

mybatis的generator的使用问题（亲测通过）

Mybatis Generator最完整配置详解