<?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> 
  <!-- 指定連接數(shù)據(jù)庫的 JDBC 驅(qū)動(dòng)包所在位置，指定到你本機(jī)的完整路徑 --> 
  <classPathEntry location="E:\Java\tool\maven_repository\mysql\mysql-connector-java\5.1.9\mysql-connector-java-5.1.9.jar"/> 
 
 
 
  <!-- 配置 table 表信息內(nèi)容體，targetRuntime 指定采用 MyBatis3 的版本 --> 
  <context id="tables" targetRuntime="MyBatis3"> 
    <!-- 抑制生成注釋，由于生成的注釋都是英文的，可以不讓它生成 --> 
    <commentGenerator> 
      <property name="suppressAllComments" value="true"/> 
    </commentGenerator> 
    <!-- 配置數(shù)據(jù)庫連接信息 --> 
    <jdbcConnection driverClass="com.mysql.jdbc.Driver" 
            connectionURL="jdbc:mysql://localhost:3306/springboot" 
            userId="root" 
            password="123456"> 
    </jdbcConnection> 
 
 
 
 
    <!-- 生成 model 類，targetPackage 指定 model 類的包名， targetProject 指定 
    生成的 model 放在 IDEA 的哪個(gè)工程下面--> 
    <javaModelGenerator targetPackage="com.md.springboot.model" 
              targetProject="src/main/java"> 
      <property name="enableSubPackages" value="false"/> 
      <property name="trimStrings" value="false"/> 
    </javaModelGenerator> 
 
 
 
 
    <!-- 生成 MyBatis 的 Mapper.xml 文件，targetPackage 指定 mapper.xml 文件的 
    包名， targetProject 指定生成的 mapper.xml 放在 IDEA 的哪個(gè)工程下面 --> 
    <sqlMapGenerator targetPackage="com.md.springboot.mapper" 
             targetProject="src/main/java"> 
      <property name="enableSubPackages" value="false"/> 
    </sqlMapGenerator> 
 
 
 
 
 
    <!-- 生成 MyBatis 的 Mapper 接口類文件,targetPackage 指定 Mapper 接口類的包 
    名， targetProject 指定生成的 Mapper 接口放在 IDEA 的哪個(gè)工程下面 --> 
    <javaClientGenerator type="XMLMAPPER" 
               targetPackage="com.md.springboot.mapper" targetProject="src/main/java"> 
      <property name="enableSubPackages" value="false"/> 
    </javaClientGenerator> 
 
 
 
 
 
    <!-- 數(shù)據(jù)庫表名及對(duì)應(yīng)的 Java 模型類名，有幾個(gè)表寫幾個(gè)table --> 
    <table tableName="t_student" domainObjectName="Student" 
        enableCountByExample="false" 
        enableUpdateByExample="false" 
        enableDeleteByExample="false" 
        enableSelectByExample="false" 
        selectByExampleQueryId="false"/> 
 
 
  </context> 
</generatorConfiguration> 

<build> 
  <plugins> 
    <!--mybatis 代碼自動(dòng)生成插件--> 
    <plugin> 
      <groupId>org.mybatis.generator</groupId> 
      <artifactId>mybatis-generator-maven-plugin</artifactId> 
      <version>1.3.6</version> 
      <configuration> 
        <!--配置文件的位置--> 
        <configurationFile>GeneratorMapper.xml</configurationFile> 
        <verbose>true</verbose> 
        <overwrite>true</overwrite> 
      </configuration> 
    </plugin> 
  </plugins> 

</build> 

package com.md.springboot.model; 
 
public class Student { 
  private Integer id; 
 
  private String name; 
 
  private Integer age; 
 
  public Integer getId() { 
    return id; 
  } 
 
  public void setId(Integer id) { 
    this.id = id; 
  } 
 
  public String getName() { 
    return name; 
  } 
 
  public void setName(String name) { 
    this.name = name; 
  } 
 
  public Integer getAge() { 
    return age; 
  } 
 
  public void setAge(Integer age) { 
    this.age = age; 
  } 
} 

package com.md.springboot.mapper; 
 
import com.md.springboot.model.Student; 
 
public interface StudentMapper { 
  int deleteByPrimaryKey(Integer id); 
 
  int insert(Student record); 
 
  int insertSelective(Student record); 
 
  Student selectByPrimaryKey(Integer id); 
 
  int updateByPrimaryKeySelective(Student record); 
 
  int updateByPrimaryKey(Student record); 
} 

<?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.md.springboot.mapper.StudentMapper"> 
 
 
 <!-- 
  數(shù)據(jù)庫字段名稱   實(shí)體對(duì)象屬性名稱 
  user_name      userName 
  user_age      userAge 
 
 --> 
 <!-- 
  如果數(shù)據(jù)表中的字段是多個(gè)單詞構(gòu)成的，通過Mybatis逆向工程生成的對(duì)象屬性名稱 
  會(huì)按照駝峰命名法的規(guī)則生成屬性名稱 
  自己設(shè)計(jì)數(shù)據(jù)表的時(shí)候，多個(gè)單詞之前使用下劃線分隔 
 
 --> 
 
 <!-- 
  resultMap的作用 
  1. 當(dāng)數(shù)據(jù)庫中的字段名稱和實(shí)體類對(duì)象的屬性名不一致，可以進(jìn)行轉(zhuǎn)換 
  2. 當(dāng)前查詢的結(jié)果對(duì)象沒有對(duì)應(yīng)一個(gè)表時(shí)，可以自定義一個(gè)結(jié)果集 
 --> 
 <resultMap id="BaseResultMap" type="com.md.springboot.model.Student"> 
  <!-- 
   id標(biāo)簽只能修飾主鍵字段，result標(biāo)簽修飾其他字段 
   column 數(shù)據(jù)庫中的字段名稱 
   property 映射對(duì)象的屬性名稱 
   jdbcType 對(duì)應(yīng)的類型 
  --> 
  <id column="id" jdbcType="INTEGER" property="id" /> 
  <result column="name" jdbcType="VARCHAR" property="name" /> 
  <result column="age" jdbcType="INTEGER" property="age" /> 
 </resultMap> 
 
 
 <!--sql語句片段，將公共部分抽出--> 
 <sql id="Base_Column_List"> 
  id, name, age 
 </sql> 
 
 <select id="selectByPrimaryKey" parameterType="java.lang.Integer" resultMap="BaseResultMap"> 
  select  
  <include refid="Base_Column_List" /> 
  from t_student 
  where id = #{id,jdbcType=INTEGER} 
 </select> 
 
 <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer"> 
  delete from t_student 
  where id = #{id,jdbcType=INTEGER} 
 </delete> 
 
 <insert id="insert" parameterType="com.md.springboot.model.Student"> 
  insert into t_student (id, name, age 
   ) 
  values (#{id,jdbcType=INTEGER}, #{name,jdbcType=VARCHAR}, #{age,jdbcType=INTEGER} 
   ) 
 </insert> 
 
 
 <!--動(dòng)態(tài)sql--> 
 <insert id="insertSelective" parameterType="com.md.springboot.model.Student"> 
  insert into t_student 
  <trim prefix="(" suffix=")" suffixOverrides=","> 
   <if test="id != null"> 
    id, 
   </if> 
   <if test="name != null"> 
    name, 
   </if> 
   <if test="age != null"> 
    age, 
   </if> 
  </trim> 
  <trim prefix="values (" suffix=")" suffixOverrides=","> 
   <if test="id != null"> 
    #{id,jdbcType=INTEGER}, 
   </if> 
   <if test="name != null"> 
    #{name,jdbcType=VARCHAR}, 
   </if> 
   <if test="age != null"> 
    #{age,jdbcType=INTEGER}, 
   </if> 
  </trim> 
 </insert> 
 
 
 <update id="updateByPrimaryKeySelective" parameterType="com.md.springboot.model.Student"> 
  update t_student 
  <set> 
   <if test="name != null"> 
    name = #{name,jdbcType=VARCHAR}, 
   </if> 
   <if test="age != null"> 
    age = #{age,jdbcType=INTEGER}, 
   </if> 
  </set> 
  where id = #{id,jdbcType=INTEGER} 
 </update> 
 
 <update id="updateByPrimaryKey" parameterType="com.md.springboot.model.Student"> 
  update t_student 
  set name = #{name,jdbcType=VARCHAR}, 
   age = #{age,jdbcType=INTEGER} 
  where id = #{id,jdbcType=INTEGER} 
 </update> 
</mapper>