spring boot mybatis生成模型文件(generator)mybatis-generator:generate

系统管理员 2021-06-11 15:10 419阅读 0赞

今天说明一下spring boot mybatis整合后使用generator生成模型文件，其中包括三个文件：

说明:本文使用user\_info数据库表做说明，前提是已经实现spring boot mybatis整合

**1，【dao层接口文件】Mapper.java文件**

**2，【mapper.xml文件】mapper.xml文件**

**3，【model对象也就是javabean文件】bean.java文件**

**一，实现步骤：**

**pom.xml文件**

**1，在**

**中新增配置**

<plugin>  
                    <groupId>org.mybatis.generator</groupId>  
                    <artifactId>mybatis-generator-maven-plugin</artifactId>  
                    <version>1.3.5</version>  
                    <dependencies>   
                        <dependency>  
                            <groupId>org.mybatis.generator</groupId>  
                            <artifactId>mybatis-generator-core</artifactId>  
                            <version>1.3.5</version>  
                        </dependency>  
                    </dependencies>  
                    <executions>  
                        <execution>  
                            <id>Generate MyBatis Artifacts</id>  
                            <phase>package</phase>  
                            <goals>  
                                <goal>generate</goal>  
                            </goals>  
                        </execution>  
                    </executions>  
                    <configuration>  
                          
                        <verbose>true</verbose>  
                          
                        <overwrite>true</overwrite>  
                          
                        <configurationFile>src/main/resources/generatorConfig.xml</configurationFile>
                    </configuration>  
                </plugin>

**2，在src/main/resources目录下新建xml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>
     		
         <classPathEntry
                 location="F:\MavenRepository\mysql\mysql-connector-java\5.1.39\mysql-connector-java-5.1.39.jar"/>
         <context id="my" targetRuntime="MyBatis3">
             <commentGenerator>
                 <property name="suppressDate" value="false"/>
                 <property name="suppressAllComments" value="true"/>
             </commentGenerator>
     		
             <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://127.0.0.1/test" userId="root" password="root">    
            </jdbcConnection>   
     		
             <javaModelGenerator targetPackage="com.mycompany.mavenspringboot.model" targetProject="F:\SVNFile\mavenSpringBoot\model">
                 <property name="enableSubPackages" value="true"/>
                 <property name="trimStrings" value="true"/>
             </javaModelGenerator>
     		
             <sqlMapGenerator targetPackage="mapper" targetProject="F:\SVNFile\mavenSpringBoot\model">
                 <property name="enableSubPackages" value="true"/>
             </sqlMapGenerator>
     		
             <javaClientGenerator targetPackage="com.mycompany.mavenspringboot.mapper" targetProject="F:\SVNFile\mavenSpringBoot\model" type="XMLMAPPER">
                 <property name="enableSubPackages" value="true"/>
             </javaClientGenerator>
     		
                <table tableName="user_info" domainObjectName="UserInfo"
                    enableCountByExample="false" enableUpdateByExample="false"
                    enableDeleteByExample="false" enableSelectByExample="false"
                    selectByExampleQueryId="false">
                </table> 
         </context>
     </generatorConfiguration>

到这里，配置已经完成

下面我已netbeans8.0作为演示，生成结果(由于笔者使用Netbeans开发工具，其他开发工具可参照，因为此操作与开发工具影响不大)

**3，点击pom.xml文件右键 ->运行Maven-->目标，然后出现**  
![Image 1][]

![Image 1][]![Center][]

在目标中输入，点击确定

![Image 1][]![Center 1][]

结果已经生成在对象你设置的文件目录下。

![Center 2][]

下面给出文件示例；

**1，【dao层接口文件】UserInfoMapper.java文件**

package com.mycompany.mavenspringboot.mapper;
    
    import com.mycompany.mavenspringboot.model.UserInfo;
    
    public interface UserInfoMapper {
        int deleteByPrimaryKey(Integer userid);
    
        int insert(UserInfo record);
    
        int insertSelective(UserInfo record);
    
        UserInfo selectByPrimaryKey(Integer userid);
    
        int updateByPrimaryKeySelective(UserInfo record);
    
        int updateByPrimaryKey(UserInfo record);
    }

**2，【mapper.xml文件】UserInfoMapper.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="com.mycompany.mavenspringboot.mapper.UserInfoMapper">
      <resultMap id="BaseResultMap" type="com.mycompany.mavenspringboot.model.UserInfo">
        <id column="userid" jdbcType="INTEGER" property="userid" />
        <result column="loginname" jdbcType="VARCHAR" property="loginname" />
        <result column="loginpwd" jdbcType="VARCHAR" property="loginpwd" />
        <result column="nickname" jdbcType="VARCHAR" property="nickname" />
        <result column="status" jdbcType="TINYINT" property="status" />
      </resultMap>
      <sql id="Base_Column_List">
        userid, loginname, loginpwd, nickname, status
      </sql>
      <select id="selectByPrimaryKey" parameterType="java.lang.Integer" resultMap="BaseResultMap">
        select 
        <include refid="Base_Column_List" />
        from user_info
        where userid = #{userid,jdbcType=INTEGER}
      </select>
      <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">
        delete from user_info
        where userid = #{userid,jdbcType=INTEGER}
      </delete>
      <insert id="insert" parameterType="com.mycompany.mavenspringboot.model.UserInfo">
        insert into user_info (userid, loginname, loginpwd, 
          nickname, status)
        values (#{userid,jdbcType=INTEGER}, #{loginname,jdbcType=VARCHAR}, #{loginpwd,jdbcType=VARCHAR}, 
          #{nickname,jdbcType=VARCHAR}, #{status,jdbcType=TINYINT})
      </insert>
      <insert id="insertSelective" parameterType="com.mycompany.mavenspringboot.model.UserInfo">
        insert into user_info
        <trim prefix="(" suffix=")" suffixOverrides=",">
          <if test="userid != null">
            userid,
          </if>
          <if test="loginname != null">
            loginname,
          </if>
          <if test="loginpwd != null">
            loginpwd,
          </if>
          <if test="nickname != null">
            nickname,
          </if>
          <if test="status != null">
            status,
          </if>
        </trim>
        <trim prefix="values (" suffix=")" suffixOverrides=",">
          <if test="userid != null">
            #{userid,jdbcType=INTEGER},
          </if>
          <if test="loginname != null">
            #{loginname,jdbcType=VARCHAR},
          </if>
          <if test="loginpwd != null">
            #{loginpwd,jdbcType=VARCHAR},
          </if>
          <if test="nickname != null">
            #{nickname,jdbcType=VARCHAR},
          </if>
          <if test="status != null">
            #{status,jdbcType=TINYINT},
          </if>
        </trim>
      </insert>
      <update id="updateByPrimaryKeySelective" parameterType="com.mycompany.mavenspringboot.model.UserInfo">
        update user_info
        <set>
          <if test="loginname != null">
            loginname = #{loginname,jdbcType=VARCHAR},
          </if>
          <if test="loginpwd != null">
            loginpwd = #{loginpwd,jdbcType=VARCHAR},
          </if>
          <if test="nickname != null">
            nickname = #{nickname,jdbcType=VARCHAR},
          </if>
          <if test="status != null">
            status = #{status,jdbcType=TINYINT},
          </if>
        </set>
        where userid = #{userid,jdbcType=INTEGER}
      </update>
      <update id="updateByPrimaryKey" parameterType="com.mycompany.mavenspringboot.model.UserInfo">
        update user_info
        set loginname = #{loginname,jdbcType=VARCHAR},
          loginpwd = #{loginpwd,jdbcType=VARCHAR},
          nickname = #{nickname,jdbcType=VARCHAR},
          status = #{status,jdbcType=TINYINT}
        where userid = #{userid,jdbcType=INTEGER}
      </update>
    </mapper>

**3，【model对象也就是javabean文件】UserInfo.java文件**

package com.mycompany.mavenspringboot.model;
    
    public class UserInfo {
        private Integer userid;
    
        private String loginname;
    
        private String loginpwd;
    
        private String nickname;
    
        private Byte status;
    
        public Integer getUserid() {
            return userid;
        }
    
        public void setUserid(Integer userid) {
            this.userid = userid;
        }
    
        public String getLoginname() {
            return loginname;
        }
    
        public void setLoginname(String loginname) {
            this.loginname = loginname == null ? null : loginname.trim();
        }
    
        public String getLoginpwd() {
            return loginpwd;
        }
    
        public void setLoginpwd(String loginpwd) {
            this.loginpwd = loginpwd == null ? null : loginpwd.trim();
        }
    
        public String getNickname() {
            return nickname;
        }
    
        public void setNickname(String nickname) {
            this.nickname = nickname == null ? null : nickname.trim();
        }
    
        public Byte getStatus() {
            return status;
        }
    
        public void setStatus(Byte status) {
            this.status = status;
        }
    }

***二,其中要注意的重点：***

***1，执行pom文件的命令已经在generatorConfig.xml配置文件中(防止自己拼写时候出现错误)***

***![Image 1][]![Center 3][]***

***2，两类文件包名的设置，必须是您实际项目对应文件模型的包名，这样生成的xml文件才会正确。xml文件的包名可以随实际情况设置![Image 1][]***

***![Center 4][]***

***3，生成文件路径：建议不要设置为您实际项目的项目路径(src/main/java),否则生成的文件会替换您原有的文件，如果原有的文件已经做过修改，那么就会倒是之前的修改不存在了***

***4，测试数据如下***

DROP TABLE IF EXISTS `user_info`;
    CREATE TABLE `user_info` (
      `userid` int(10) NOT NULL AUTO_INCREMENT,
      `loginname` varchar(255) DEFAULT NULL,
      `loginpwd` varchar(255) DEFAULT NULL,
      `nickname` varchar(255) DEFAULT NULL,
      `status` tinyint(2) DEFAULT '0',
      PRIMARY KEY (`userid`)
    ) ENGINE=MyISAM AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;

[Image 1]: 
[Center]: /images/20210516/85b16dbc47a0429a91b28ff1cb3c5f87.png
[Center 1]: /images/20210516/916f0b12a6fc40f1ad35683f5078fecf.png
[Center 2]: /images/20210516/5c25a33058d34a649334541d0042a856.png
[Center 3]: /images/20210516/8a2a97d9b2244f5ab7b8cb6572e5199c.png
[Center 4]: /images/20210516/6c49347d64b5452a98d41a8bd7e9722d.png