eclipse mybatis generator插件自动生成实体、mapper接口和XML教程

先在eclipse marketplace 搜索mybatis generator 插件，安装；

之后随便建一张表：

DROP TABLE IF EXISTS `tb_user`;
CREATE TABLE `tb_user` (
  `id` bigint(255) NOT NULL,
  `username` varchar(255) DEFAULT NULL,
  `password` varchar(255) DEFAULT NULL,
  `phone` varchar(255) DEFAULT NULL,
  `email` varchar(255) DEFAULT NULL,
  `created` timestamp NULL DEFAULT NULL,
  `updated` timestamp NULL DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

之后修改genaratorConfig.xml:

对了，另附上方便复制：

<?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>  
    <!-- <classPathEntry location="D:\rep\mysql\mysql-connector-java\5.1.19\mysql-connector-java-5.1.19.jar" /> -->  
     <classPathEntry location="D:\Program Files\apache-maven-3.2.5\jars\mysql\mysql-connector-java\5.1.35\mysql-connector-java-5.1.35.jar" />  
    <context id="DB2Tables" targetRuntime="MyBatis3">  
        <commentGenerator>  
            <property name="suppressAllComments" value="true" />  
            <property name="suppressDate" value="true" />   
        </commentGenerator>  
  
        <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/shop?userUnicode=true&amp;characterEncoding=utf8" userId="root" password="12345" />  
  
        <javaTypeResolver>  
            <property name="forceBigDecimals" value="false" />  
            <!-- 默认false，把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer true，把JDBC DECIMAL 和 NUMERIC 类型解析为java.math.BigDecimal -->  
        </javaTypeResolver>  
  
        <javaModelGenerator targetPackage="org.shop.sso.dao.entity" targetProject="shop-sso/src/main/java">  
            <property name="enableSubPackages" value="true" />  
            <property name="trimStrings" value="true" />  
        </javaModelGenerator>  
  
        <sqlMapGenerator targetPackage="org.shop.sso.dao.mapper" targetProject="shop-sso/src/main/java">  
            <property name="enableSubPackages" value="false" />  
        </sqlMapGenerator>  
        <javaClientGenerator targetPackage="org.shop.sso.dao.mapper" targetProject="shop-sso/src/main/java" type="XMLMAPPER">  
            <property name="enableSubPackages" value="false" />  
        </javaClientGenerator>  
  
        <table tableName="tb_user" enableSelectByExample="false" enableDeleteByExample="false" enableCountByExample="false" selectByExampleQueryId="true" enableUpdateByExample="false">  
            <!-- <generatedKey column="ID" sqlStatement="oracle" identity="true" /> -->  
        </table>  
    </context>  
</generatorConfiguration>  

之后右键genaratorConfig.xml文件，生成：

生成的代码如下：

实体：

package org.shop.sso.dao.entity;

import java.util.Date;

public class TbUser {
    private Long id;

    private String username;

    private String password;

    private String phone;

    private String email;

    private Date created;

    private Date updated;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username == null ? null : username.trim();
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password == null ? null : password.trim();
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone == null ? null : phone.trim();
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email == null ? null : email.trim();
    }

    public Date getCreated() {
        return created;
    }

    public void setCreated(Date created) {
        this.created = created;
    }

    public Date getUpdated() {
        return updated;
    }

    public void setUpdated(Date updated) {
        this.updated = updated;
    }
}

mapper接口：

package org.shop.sso.dao.mapper;

import org.shop.sso.dao.entity.TbUser;

public interface TbUserMapper {
    int deleteByPrimaryKey(Long id);

    int insert(TbUser record);

    int insertSelective(TbUser record);

    TbUser selectByPrimaryKey(Long id);

    int updateByPrimaryKeySelective(TbUser record);

    int updateByPrimaryKey(TbUser record);
}

mapper XML文件：

<?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="org.shop.sso.dao.mapper.TbUserMapper">
  <resultMap id="BaseResultMap" type="org.shop.sso.dao.entity.TbUser">
    <id column="id" jdbcType="BIGINT" property="id" />
    <result column="username" jdbcType="VARCHAR" property="username" />
    <result column="password" jdbcType="VARCHAR" property="password" />
    <result column="phone" jdbcType="VARCHAR" property="phone" />
    <result column="email" jdbcType="VARCHAR" property="email" />
    <result column="created" jdbcType="TIMESTAMP" property="created" />
    <result column="updated" jdbcType="TIMESTAMP" property="updated" />
  </resultMap>
  <sql id="Base_Column_List">
    id, username, password, phone, email, created, updated
  </sql>
  <select id="selectByPrimaryKey" parameterType="java.lang.Long" resultMap="BaseResultMap">
    select 
    <include refid="Base_Column_List" />
    from tb_user
    where id = #{id,jdbcType=BIGINT}
  </select>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.Long">
    delete from tb_user
    where id = #{id,jdbcType=BIGINT}
  </delete>
  <insert id="insert" parameterType="org.shop.sso.dao.entity.TbUser">
    insert into tb_user (id, username, password, 
      phone, email, created, 
      updated)
    values (#{id,jdbcType=BIGINT}, #{username,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR}, 
      #{phone,jdbcType=VARCHAR}, #{email,jdbcType=VARCHAR}, #{created,jdbcType=TIMESTAMP}, 
      #{updated,jdbcType=TIMESTAMP})
  </insert>
  <insert id="insertSelective" parameterType="org.shop.sso.dao.entity.TbUser">
    insert into tb_user
    <trim prefix="(" suffix=")" suffixOverrides=",">
      <if test="id != null">
        id,
      </if>
      <if test="username != null">
        username,
      </if>
      <if test="password != null">
        password,
      </if>
      <if test="phone != null">
        phone,
      </if>
      <if test="email != null">
        email,
      </if>
      <if test="created != null">
        created,
      </if>
      <if test="updated != null">
        updated,
      </if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides=",">
      <if test="id != null">
        #{id,jdbcType=BIGINT},
      </if>
      <if test="username != null">
        #{username,jdbcType=VARCHAR},
      </if>
      <if test="password != null">
        #{password,jdbcType=VARCHAR},
      </if>
      <if test="phone != null">
        #{phone,jdbcType=VARCHAR},
      </if>
      <if test="email != null">
        #{email,jdbcType=VARCHAR},
      </if>
      <if test="created != null">
        #{created,jdbcType=TIMESTAMP},
      </if>
      <if test="updated != null">
        #{updated,jdbcType=TIMESTAMP},
      </if>
    </trim>
  </insert>
  <update id="updateByPrimaryKeySelective" parameterType="org.shop.sso.dao.entity.TbUser">
    update tb_user
    <set>
      <if test="username != null">
        username = #{username,jdbcType=VARCHAR},
      </if>
      <if test="password != null">
        password = #{password,jdbcType=VARCHAR},
      </if>
      <if test="phone != null">
        phone = #{phone,jdbcType=VARCHAR},
      </if>
      <if test="email != null">
        email = #{email,jdbcType=VARCHAR},
      </if>
      <if test="created != null">
        created = #{created,jdbcType=TIMESTAMP},
      </if>
      <if test="updated != null">
        updated = #{updated,jdbcType=TIMESTAMP},
      </if>
    </set>
    where id = #{id,jdbcType=BIGINT}
  </update>
  <update id="updateByPrimaryKey" parameterType="org.shop.sso.dao.entity.TbUser">
    update tb_user
    set username = #{username,jdbcType=VARCHAR},
      password = #{password,jdbcType=VARCHAR},
      phone = #{phone,jdbcType=VARCHAR},
      email = #{email,jdbcType=VARCHAR},
      created = #{created,jdbcType=TIMESTAMP},
      updated = #{updated,jdbcType=TIMESTAMP}
    where id = #{id,jdbcType=BIGINT}
  </update>
</mapper>

好的，我觉得我讲的蛮清楚的。。。