环境
? 使用springboot2，jdk1.8，idea
在pom引入相关依赖
<!--mybatise-generator-->
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<configuration>
<!--在此处指定配置文件位置-->
<configurationFile>src/main/resources/generatorConfig/generatorConfig.xml</configurationFile>
<verbose>true</verbose>
<overwrite>true</overwrite>
</configuration>
<!--mybatise-generator-->
<dependencies>
<!--在此处引入所需依赖-->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.44</version>
</dependency>
</dependencies>
</plugin>
注意：
? mybatis-generator版本如果和mysql差距過大，可能在生成代码的过程中引起报错
在Resource中配置配置文件
<?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>
<!--注意这里的targetRuntime="MyBatis3Simple"，指定了不生成Example相关内容-->
<context id="MysqlTables" targetRuntime="MyBatis3Simple">
<commentGenerator>
<property name="suppressDate" value="true"/>
<!-- 是否去除自动生成的注释 true：是 ： false:否 -->
<property name="suppressAllComments" value="true"/>
</commentGenerator>
<!-- jdbc链接信息 -->
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8"
userId="root" password="123456">
</jdbcConnection>
<javaTypeResolver>
<property name="forceBigDecimals" value="false"/>
</javaTypeResolver>
<!-- 生成PO类的位置 -->
<javaModelGenerator targetPackage="com.huang.po"
targetProject="src/main/java">
<property name="enableSubPackages" value="true"/>
<property name="trimStrings" value="true"/>
</javaModelGenerator>
<!-- mapper映射文件生成的位置 -->
<sqlMapGenerator targetPackage="mapper"
targetProject="src/main/resources">
<property name="enableSubPackages" value="true"/>
</sqlMapGenerator>
<!-- mapper接口生成的位置 -->
<javaClientGenerator type="XMLMAPPER"
targetPackage="com.party.community.template"
targetProject="src/main/java">
<property name="enableSubPackages" value="true"/>
</javaClientGenerator>
<!-- 指定要生成的表，主鍵，po类名 -->
<table tableName="Admins" domainObjectName="Admins">
<property name="useActualColumnNames" value="true"/>
<generatedKey column="a_id" sqlStatement="MySql" identity="true"/>
</table>
</context>
</generatorConfiguration>
注意：
? 1.存放生成代码的指定包或者文件夹可以不用提前建好，只要路径没错插件会顺便一起建好
? 2.根指定路径的不同，部分生成代码可能会需要更改。比如映射配置文件，
?
? namespace的生成是根据上面的配置而生成的，如果你在生成代码后还想要移动mapper的話，要记得修改对应路径
生成代码
代开Maven菜单，点击Plugins里的mybatis-generator，即可自动生成
目录结构
生成的代码
java代码
package com.party.community.po;
import org.springframework.stereotype.Component;
import java.util.Date;
@Component
public class User {
private String u_idcard;
private String u_unsername;
private String u_tel;
private String u_pwd;
private String u_avator;
private String u_sex;
private Date u_birthday;
private String u_history;
private String u_remark;
public String getU_idcard() {
return u_idcard;
}
public void setU_idcard(String u_idcard) {
this.u_idcard = u_idcard == null ? null : u_idcard.trim();
}
public String getU_unsername() {
return u_unsername;
}
public void setU_unsername(String u_unsername) {
this.u_unsername = u_unsername == null ? null : u_unsername.trim();
}
public String getU_tel() {
return u_tel;
}
public void setU_tel(String u_tel) {
this.u_tel = u_tel == null ? null : u_tel.trim();
}
public String getU_pwd() {
return u_pwd;
}
public void setU_pwd(String u_pwd) {
this.u_pwd = u_pwd == null ? null : u_pwd.trim();
}
public String getU_avator() {
return u_avator;
}
public void setU_avator(String u_avator) {
this.u_avator = u_avator == null ? null : u_avator.trim();
}
public String getU_sex() {
return u_sex;
}
public void setU_sex(String u_sex) {
this.u_sex = u_sex == null ? null : u_sex.trim();
}
public Date getU_birthday() {
return u_birthday;
}
public void setU_birthday(Date u_birthday) {
this.u_birthday = u_birthday;
}
public String getU_history() {
return u_history;
}
public void setU_history(String u_history) {
this.u_history = u_history == null ? null : u_history.trim();
}
public String getU_remark() {
return u_remark;
}
public void setU_remark(String u_remark) {
this.u_remark = u_remark == null ? null : u_remark.trim();
}
}
生成的po，已写好get和set方法
package com.party.community.mapper;
import com.party.community.po.User;
import java.util.List;
public interface UserMapper {
int deleteByPrimaryKey(String u_idcard);
int insert(User record);
User selectByPrimaryKey(String u_idcard);
List<User> selectAll();
int updateByPrimaryKey(User record);
User selectByPhone(String phone);
}
xml映射文件
<?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="com.party.community.mapper.UserMapper" >
<resultMap id="BaseResultMap" type="com.party.community.po.User" >
<id column="u_idcard" property="u_idcard" jdbcType="VARCHAR" />
<result column="u_unsername" property="u_unsername" jdbcType="VARCHAR" />
<result column="u_tel" property="u_tel" jdbcType="VARCHAR" />
<result column="u_pwd" property="u_pwd" jdbcType="VARCHAR" />
<result column="u_avator" property="u_avator" jdbcType="VARCHAR" />
<result column="u_sex" property="u_sex" jdbcType="VARCHAR" />
<result column="u_birthday" property="u_birthday" jdbcType="TIMESTAMP" />
<result column="u_history" property="u_history" jdbcType="VARCHAR" />
<result column="u_remark" property="u_remark" jdbcType="VARCHAR" />
</resultMap>
<delete id="deleteByPrimaryKey" parameterType="java.lang.String" >
delete from user
where u_idcard = #{u_idcard,jdbcType=VARCHAR}
</delete>
<insert id="insert" parameterType="com.party.community.po.User" >
<selectKey resultType="java.lang.String" keyProperty="u_idcard" order="AFTER" >
SELECT LAST_INSERT_ID()
</selectKey>
insert into user (u_unsername,u_tel,u_pwd,u_avator,u_sex,u_birthday,u_history,u_remark)
values (#{u_unsername,jdbcType=VARCHAR},#{u_tel,#{u_pwd,#{u_avator,#{u_sex,#{u_birthday,jdbcType=TIMESTAMP},#{u_history,#{u_remark,jdbcType=VARCHAR})
</insert>
<update id="updateByPrimaryKey" parameterType="com.party.community.po.User" >
update user
set u_unsername = #{u_unsername,u_tel = #{u_tel,u_pwd = #{u_pwd,u_avator = #{u_avator,u_sex = #{u_sex,u_birthday = #{u_birthday,u_history = #{u_history,u_remark = #{u_remark,jdbcType=VARCHAR}
where u_idcard = #{u_idcard,jdbcType=VARCHAR}
</update>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.String" >
select u_idcard,u_unsername,u_remark
from user
where u_idcard = #{u_idcard,jdbcType=VARCHAR}
</select>
<select id="selectAll" resultMap="BaseResultMap" >
select u_idcard,u_remark
from user
</select>
<select id="selectByPhone" resultType="User">
select *
from user
where u_tel = #{phone}
</select>
</mapper>
生成的mapper和映射文件，已经生成了基本的增删改查和根据主键查找的方法 （编辑：李大同）
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