Mybatis代码自动生成

Posted 2021-02-21 wangyongfengxiaokeai

Mybatis代码自动生成

• 下载地址：https://github.com/DuDuPang/wagn.git

• 文件截图

  

一、修改generatorConfig.xml文件

• 修改本地数据库的：url，用户名，密码，要生成代码的table表格

<?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-->    
    <classPathEntry  location="mysql-connector-java-5.1.34.jar"/>    
    <context id="DB2Tables"  targetRuntime="MyBatis3">    
        <commentGenerator>    
            <property name="suppressDate" value="true"/>     
            <property name="suppressAllComments" value="true"/>    
        </commentGenerator>    
        <!--数据库链接URL，用户名、密码 -->    
        <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/first_test" userId="root" password="123456">    
        </jdbcConnection>    
        <javaTypeResolver>    
            <property name="forceBigDecimals" value="false"/>    
        </javaTypeResolver>    
        <!-- 生成模型的包名和位置-->    
        <javaModelGenerator targetPackage="自动生成代码.pojo" targetProject="./">    
            <property name="enableSubPackages" value="true"/>    
            <property name="trimStrings" value="true"/>    
        </javaModelGenerator>    
        <!-- 生成映射文件的包名和位置-->    
        <sqlMapGenerator targetPackage="自动生成代码.mapper" targetProject="./">    
            <property name="enableSubPackages" value="true"/>    
        </sqlMapGenerator>    
        <!-- 生成DAO的包名和位置-->    
        <javaClientGenerator type="XMLMAPPER" targetPackage="自动生成代码.mapperInterface" targetProject="./">    
            <property name="enableSubPackages" value="true"/>    
        </javaClientGenerator>    
        <!-- 要生成的表 tableName是数据库中的表名或视图名 domainObjectName是实体类名-->    
        <table tableName="user_table" domainObjectName="User" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table>  
    </context>    
</generatorConfiguration>

二、双击start.bat运行

• 1、运行成功,code目录下便是生成的代码

• 这是我的数据库

  

• 2、mapper

  <?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="code.mapperInterface.UserMapper">
    <resultMap id="BaseResultMap" type="code.pojo.User">
      <id column="id" jdbcType="INTEGER" property="id" />
      <result column="email" jdbcType="VARCHAR" property="email" />
      <result column="password" jdbcType="VARCHAR" property="password" />
      <result column="perm" jdbcType="VARCHAR" property="perm" />
    </resultMap>
    <sql id="Base_Column_List">
      id, email, password, perm
    </sql>
    <select id="selectByPrimaryKey" parameterType="java.lang.Integer" resultMap="BaseResultMap">
      select 
      <include refid="Base_Column_List" />
      from user_table
      where id = #{id,jdbcType=INTEGER}
    </select>
    <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">
      delete from user_table
      where id = #{id,jdbcType=INTEGER}
    </delete>
    <insert id="insert" parameterType="code.pojo.User">
      insert into user_table (id, email, password, 
        perm)
      values (#{id,jdbcType=INTEGER}, #{email,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR}, 
        #{perm,jdbcType=VARCHAR})
    </insert>
    <insert id="insertSelective" parameterType="code.pojo.User">
      insert into user_table
      <trim prefix="(" suffix=")" suffixOverrides=",">
        <if test="id != null">
          id,
        </if>
        <if test="email != null">
          email,
        </if>
        <if test="password != null">
          password,
        </if>
        <if test="perm != null">
          perm,
        </if>
      </trim>
      <trim prefix="values (" suffix=")" suffixOverrides=",">
        <if test="id != null">
          #{id,jdbcType=INTEGER},
        </if>
        <if test="email != null">
          #{email,jdbcType=VARCHAR},
        </if>
        <if test="password != null">
          #{password,jdbcType=VARCHAR},
        </if>
        <if test="perm != null">
          #{perm,jdbcType=VARCHAR},
        </if>
      </trim>
    </insert>
    <update id="updateByPrimaryKeySelective" parameterType="code.pojo.User">
      update user_table
      <set>
        <if test="email != null">
          email = #{email,jdbcType=VARCHAR},
        </if>
        <if test="password != null">
          password = #{password,jdbcType=VARCHAR},
        </if>
        <if test="perm != null">
          perm = #{perm,jdbcType=VARCHAR},
        </if>
      </set>
      where id = #{id,jdbcType=INTEGER}
    </update>
    <update id="updateByPrimaryKey" parameterType="code.pojo.User">
      update user_table
      set email = #{email,jdbcType=VARCHAR},
        password = #{password,jdbcType=VARCHAR},
        perm = #{perm,jdbcType=VARCHAR}
      where id = #{id,jdbcType=INTEGER}
    </update>
  </mapper>
  

• 3、mapperInterface

  package code.mapperInterface;
  
  import code.pojo.User;
  
  public interface UserMapper {
      int deleteByPrimaryKey(Integer id);
  
      int insert(User record);
  
      int insertSelective(User record);
  
      User selectByPrimaryKey(Integer id);
  
      int updateByPrimaryKeySelective(User record);
  
      int updateByPrimaryKey(User record);
  }
  

• 4、pojo

  package code.pojo;
  
  public class User {
      private Integer id;
  
      private String email;
  
      private String password;
  
      private String perm;
  
      public Integer getId() {
          return id;
      }
  
      public void setId(Integer id) {
          this.id = id;
      }
  
      public String getEmail() {
          return email;
      }
  
      public void setEmail(String email) {
          this.email = email == null ? null : email.trim();
      }
  
      public String getPassword() {
          return password;
      }
  
      public void setPassword(String password) {
          this.password = password == null ? null : password.trim();
      }
  
      public String getPerm() {
          return perm;
      }
  
      public void setPerm(String perm) {
          this.perm = perm == null ? null : perm.trim();
      }
  }