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

xiaoxiao2021-02-28  58

https://github.com/astarring/mybatis-generator-gui  带界面版:需要jdk 1.8以上

 

出处:http://www.cnblogs.com/lichenwei/p/4145696.html

Mybatis属于半自动ORM,在使用这个框架中,工作量最大的就是书写Mapping的映射文件,由于手动书写很容易出错,我们可以利用Mybatis-Generator来帮我们自动生成文件。

 

1、相关文件

关于Mybatis-Generator的下载可以到这个地址:https://github.com/mybatis/generator/releases  

由于我使用的是Mysql数据库,这里需要在准备一个连接mysql数据库的驱动jar包

以下是相关文件截图:

 

 

和Hibernate逆向生成一样,这里也需要一个配置文件:

generatorConfig.xml

<?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="D:/OfficeAPP/AutoCreateMapper/mysql-connector-java-5.1.21.jar"/> <context id="DB2Tables" targetRuntime="MyBatis3"> <commentGenerator> <property name="suppressDate" value="true"/> <property name="suppressAllComments" value="true"/> </commentGenerator> <!--数据库链接地址账号密码--> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://172.16.2.37/uc_wsp" userId="root" password="hanming123"> </jdbcConnection> <javaTypeResolver> <property name="forceBigDecimals" value="false"/> </javaTypeResolver> <!--生成Model类存放位置--> <javaModelGenerator targetPackage="com.chinaunicom.wsp.facade.entity" targetProject="D:/OfficeAPP/AutoCreateMapper/"> <property name="enableSubPackages" value="true"/> <property name="trimStrings" value="true"/> </javaModelGenerator> <!--生成映射文件存放位置--> <sqlMapGenerator targetPackage="lcw.mapping" targetProject="D:/OfficeAPP/AutoCreateMapper/"> <property name="enableSubPackages" value="true"/> </sqlMapGenerator> <!--生成Dao类存放位置--> <javaClientGenerator type="XMLMAPPER" targetPackage="lcw.dao" targetProject="D:/OfficeAPP/AutoCreateMapper/"> <property name="enableSubPackages" value="true"/> </javaClientGenerator> <!--生成对应表及类名--> <table tableName="wsp_sms_mt" domainObjectName="SmsMt" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table> </context> </generatorConfiguration>

  

需要修改文件配置的地方我都已经把注释标注出来了,这里的相关路径(如数据库驱动包,生成对应的相关文件位置可以自定义)不能带有中文。

上面配置文件中的:

<table tableName="message" domainObjectName="Messgae" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table>

tableName和domainObjectName为必选项,分别代表数据库表名和生成的实力类名,其余的可以自定义去选择(一般情况下均为false)。

 

生成语句文件:

java -jar mybatis-generator-core-1.3.5.jar -configfile generatorConfig.xml -overwrite

 

 

2、使用方法

在该目录按住Shift键,右键鼠标选择"在此处打开命令窗口",复制粘贴生成语句的文件代码即可。

 

看下效果图:

 

 

 

 

生成相关代码:

Message.java

1 package lcw.model; 2 3 public class Messgae { 4 private Integer id; 5 6 private String title; 7 8 private String describe; 9 10 private String content; 11 12 public Integer getId() { 13 return id; 14 } 15 16 public void setId(Integer id) { 17 this.id = id; 18 } 19 20 public String getTitle() { 21 return title; 22 } 23 24 public void setTitle(String title) { 25 this.title = title == null ? null : title.trim(); 26 } 27 28 public String getDescribe() { 29 return describe; 30 } 31 32 public void setDescribe(String describe) { 33 this.describe = describe == null ? null : describe.trim(); 34 } 35 36 public String getContent() { 37 return content; 38 } 39 40 public void setContent(String content) { 41 this.content = content == null ? null : content.trim(); 42 } 43 }

MessgaeMapper.xml

1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > 3 <mapper namespace="lcw.dao.MessgaeMapper" > 4 <resultMap id="BaseResultMap" type="lcw.model.Messgae" > 5 <id column="id" property="id" jdbcType="INTEGER" /> 6 <result column="title" property="title" jdbcType="VARCHAR" /> 7 <result column="describe" property="describe" jdbcType="VARCHAR" /> 8 <result column="content" property="content" jdbcType="VARCHAR" /> 9 </resultMap> 10 <sql id="Base_Column_List" > 11 id, title, describe, content 12 </sql> 13 <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" > 14 select 15 <include refid="Base_Column_List" /> 16 from message 17 where id = #{id,jdbcType=INTEGER} 18 </select> 19 <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" > 20 delete from message 21 where id = #{id,jdbcType=INTEGER} 22 </delete> 23 <insert id="insert" parameterType="lcw.model.Messgae" > 24 insert into message (id, title, describe, 25 content) 26 values (#{id,jdbcType=INTEGER}, #{title,jdbcType=VARCHAR}, #{describe,jdbcType=VARCHAR}, 27 #{content,jdbcType=VARCHAR}) 28 </insert> 29 <insert id="insertSelective" parameterType="lcw.model.Messgae" > 30 insert into message 31 <trim prefix="(" suffix=")" suffixOverrides="," > 32 <if test="id != null" > 33 id, 34 </if> 35 <if test="title != null" > 36 title, 37 </if> 38 <if test="describe != null" > 39 describe, 40 </if> 41 <if test="content != null" > 42 content, 43 </if> 44 </trim> 45 <trim prefix="values (" suffix=")" suffixOverrides="," > 46 <if test="id != null" > 47 #{id,jdbcType=INTEGER}, 48 </if> 49 <if test="title != null" > 50 #{title,jdbcType=VARCHAR}, 51 </if> 52 <if test="describe != null" > 53 #{describe,jdbcType=VARCHAR}, 54 </if> 55 <if test="content != null" > 56 #{content,jdbcType=VARCHAR}, 57 </if> 58 </trim> 59 </insert> 60 <update id="updateByPrimaryKeySelective" parameterType="lcw.model.Messgae" > 61 update message 62 <set > 63 <if test="title != null" > 64 title = #{title,jdbcType=VARCHAR}, 65 </if> 66 <if test="describe != null" > 67 describe = #{describe,jdbcType=VARCHAR}, 68 </if> 69 <if test="content != null" > 70 content = #{content,jdbcType=VARCHAR}, 71 </if> 72 </set> 73 where id = #{id,jdbcType=INTEGER} 74 </update> 75 <update id="updateByPrimaryKey" parameterType="lcw.model.Messgae" > 76 update message 77 set title = #{title,jdbcType=VARCHAR}, 78 describe = #{describe,jdbcType=VARCHAR}, 79 content = #{content,jdbcType=VARCHAR} 80 where id = #{id,jdbcType=INTEGER} 81 </update> 82 </mapper>

MessgaeMapper.java

 1 package lcw.dao;  2   3 import lcw.model.Messgae;  4   5 public interface MessgaeMapper {  6     int deleteByPrimaryKey(Integer id);  7   8     int insert(Messgae record);  9  10     int insertSelective(Messgae record); 11  12     Messgae selectByPrimaryKey(Integer id); 13  14     int updateByPrimaryKeySelective(Messgae record); 15  16     int updateByPrimaryKey(Messgae record); 17 }
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