pom檔案 主要程式碼

 <dependencies>


        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

        <!--分頁外掛 可忽略-->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.2.9</version>
        </dependency>


 </dependencies>


    <build>
        <plugins>


 <!--要打包了這個生成程式碼要禁止掉，本地開發開啟-->
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.5</version>
                <dependencies>
                    <!--配置這個依賴主要是為了等下在配置mybatis-generator.xml的時候可以不用配置classPathEntry這樣的一個屬性，避免程式碼的耦合度太高-->
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>5.1.47</version>
                    </dependency>
                    <dependency>
                        <groupId>tk.mybatis</groupId>
                        <artifactId>mapper</artifactId>
                        <version>3.4.4</version>
                    </dependency>
                </dependencies>
                <executions>
                    <execution>
                        <id>Generate MyBatis Artifacts</id>
                        <phase>package</phase>
                        <goals>
                            <goal>generate</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <!--允許移動生成的檔案 -->
                    <verbose>true</verbose>
                    <!-- 是否覆蓋 -->
                    <overwrite>true</overwrite>
                    <!-- 自動生成的配置 -->
                    <configurationFile>src/main/resources/mybatis-generator/mybatis-generator.xml</configurationFile>
                </configuration>
            </plugin>


        </plugins>
    </build>
 

mybatis-generator.xml(resources目錄下面   在pom檔案中指定)

<?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">
<!-- 配置生成器 -->
<generatorConfiguration>
    <!--執行generator外掛生成檔案的命令： call mvn mybatis-generator:generate -e -->
    <!-- 引入配置檔案 -->
    <properties resource="config/druid.properties"/>
    <!--classPathEntry:資料庫的JDBC驅動,換成你自己的驅動位置 可選 -->
    <!--<classPathEntry location="E:\mybatis\mysql-connector-java-5.1.24-bin.jar" /> -->

    <!-- 一個數據庫一個context -->
    <!--defaultModelType="flat" 大資料欄位，不分表 -->
    <context id="MysqlTables" targetRuntime="MyBatis3Simple" defaultModelType="flat">


        <!-- 自動識別資料庫關鍵字，預設false，如果設定為true，根據SqlReservedWords中定義的關鍵字列表；
        一般保留預設值，遇到資料庫關鍵字（Java關鍵字），使用columnOverride覆蓋 -->
        <property name="autoDelimitKeywords" value="true"/>
        <!-- 生成的Java檔案的編碼 -->
        <property name="javaFileEncoding" value="utf-8"/>
        <!-- beginningDelimiter和endingDelimiter：指明資料庫的用於標記資料庫物件名的符號，比如ORACLE就是雙引號，MYSQL預設是`反引號； -->
        <property name="beginningDelimiter" value="`"/>
        <property name="endingDelimiter" value="`"/>

        <!-- 格式化java程式碼 -->
        <property name="javaFormatter" value="org.mybatis.generator.api.dom.DefaultJavaFormatter"/>
        <!-- 格式化XML程式碼 -->
        <property name="xmlFormatter" value="org.mybatis.generator.api.dom.DefaultXmlFormatter"/>
        <plugin type="org.mybatis.generator.plugins.SerializablePlugin"/>

        <plugin type="org.mybatis.generator.plugins.ToStringPlugin"/>

        <!-- 指定需要編譯的Mapper型別 （自定義介面方法）-->
        <!--<plugin type="tk.mybatis.mapper.generator.MapperPlugin">-->
        <!--<property name="mappers" value="com.wangs.config.MapperBase"/>-->
        <!--&lt;!&ndash;caseSensitive預設false，當資料庫表名區分大小寫時，可以將該屬性設定為true&ndash;&gt;-->
        <!--<property name="caseSensitive" value="true"/>-->
        <!--</plugin>-->

        <!-- 註釋 -->
        <commentGenerator>
            <property name="suppressAllComments" value="false"/><!-- 是否取消註釋 -->
            <property name="suppressDate" value="true"/> <!-- 是否生成註釋代時間戳-->
        </commentGenerator>

        <!-- jdbc連線 -->
        <jdbcConnection driverClass="${spring.datasource.type}" connectionURL="${spring.datasource.url}" userId="${spring.datasource.username}" password="${spring.datasource.password}"/>
        <!-- 型別轉換 -->
        <javaTypeResolver>
            <!-- 是否使用bigDecimal， false可自動轉化以下型別（Long, Integer, Short, etc.） -->
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>

        <!-- 生成實體類地址 targetPackage指向資料庫表對應實體類資料夾-->
        <javaModelGenerator targetPackage="com.wangs.model" targetProject="src/main/java">
            <property name="enableSubPackages" value="false"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>
        <!-- 生成mapxml檔案 targetPackage指向儲存生成XML的資料夾-->
        <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources">
            <property name="enableSubPackages" value="false"/>
        </sqlMapGenerator>
        <!-- 生成mapxml對應client，也就是介面dao targetPackage指向存放生成Mapper的java介面資料夾-->
        <javaClientGenerator targetPackage="com.wangs.mapper" targetProject="src/main/java" type="XMLMAPPER">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>
        <!-- table可以有多個,每個資料庫中的表都可以寫一個table，tableName表示要匹配的資料庫表,也可以在tableName屬性中通過使用%萬用字元來匹配所有資料庫表,只有匹配的表才會自動生成檔案 -->
        <!--如果想生成一個表則tableName="table_name"-->
        <table tableName="%"
               enableCountByExample="true"
               enableUpdateByExample="true"
               enableDeleteByExample="true"
               enableSelectByExample="true"
               selectByExampleQueryId="true">
            <property name="useActualColumnNames" value="false"/>
            <!-- 資料庫表主鍵 -->
            <generatedKey column="id" sqlStatement="Mysql" identity="true"/>
        </table>
    </context>
</generatorConfiguration>
 

實體類 User.java（生成程式碼前）

package com.wangs.model;

import java.io.Serializable;

public class User implements Serializable {

    private String id;

    private String name;

    private String password;

    private String mobile;

    private Integer age;

    private String dis;

    private static final long serialVersionUID = 1L;

}
 

指向生成程式碼命令：mvn mybatis-generator:generate 

IDEA工具可使用

執行成功：

以下為生成程式碼：

程式碼結構：

UserMapper.java

package com.wangs.mapper;

import com.wangs.model.User;
import java.util.List;

public interface UserMapper {
    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table user
     *
     * @mbg.generated
     */
    int deleteByPrimaryKey(String id);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table user
     *
     * @mbg.generated
     */
    int insert(User record);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table user
     *
     * @mbg.generated
     */
    User selectByPrimaryKey(String id);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table user
     *
     * @mbg.generated
     */
    List<User> selectAll();

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table user
     *
     * @mbg.generated
     */
    int updateByPrimaryKey(User record);
}

User.java

package com.wangs.model;

import java.io.Serializable;

public class User implements Serializable {
    /**
     *
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database column user.id
     *
     * @mbg.generated
     */
    private String id;

    /**
     *
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database column user.name
     *
     * @mbg.generated
     */
    private String name;

    /**
     *
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database column user.password
     *
     * @mbg.generated
     */
    private String password;

    /**
     *
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database column user.mobile
     *
     * @mbg.generated
     */
    private String mobile;

    /**
     *
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database column user.age
     *
     * @mbg.generated
     */
    private Integer age;

    /**
     *
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database column user.dis
     *
     * @mbg.generated
     */
    private String dis;

    /**
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database table user
     *
     * @mbg.generated
     */
    private static final long serialVersionUID = 1L;

    /**
     * This method was generated by MyBatis Generator.
     * This method returns the value of the database column user.id
     *
     * @return the value of user.id
     *
     * @mbg.generated
     */
    public String getId() {
        return id;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method sets the value of the database column user.id
     *
     * @param id the value for user.id
     *
     * @mbg.generated
     */
    public void setId(String id) {
        this.id = id == null ? null : id.trim();
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method returns the value of the database column user.name
     *
     * @return the value of user.name
     *
     * @mbg.generated
     */
    public String getName() {
        return name;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method sets the value of the database column user.name
     *
     * @param name the value for user.name
     *
     * @mbg.generated
     */
    public void setName(String name) {
        this.name = name == null ? null : name.trim();
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method returns the value of the database column user.password
     *
     * @return the value of user.password
     *
     * @mbg.generated
     */
    public String getPassword() {
        return password;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method sets the value of the database column user.password
     *
     * @param password the value for user.password
     *
     * @mbg.generated
     */
    public void setPassword(String password) {
        this.password = password == null ? null : password.trim();
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method returns the value of the database column user.mobile
     *
     * @return the value of user.mobile
     *
     * @mbg.generated
     */
    public String getMobile() {
        return mobile;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method sets the value of the database column user.mobile
     *
     * @param mobile the value for user.mobile
     *
     * @mbg.generated
     */
    public void setMobile(String mobile) {
        this.mobile = mobile == null ? null : mobile.trim();
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method returns the value of the database column user.age
     *
     * @return the value of user.age
     *
     * @mbg.generated
     */
    public Integer getAge() {
        return age;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method sets the value of the database column user.age
     *
     * @param age the value for user.age
     *
     * @mbg.generated
     */
    public void setAge(Integer age) {
        this.age = age;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method returns the value of the database column user.dis
     *
     * @return the value of user.dis
     *
     * @mbg.generated
     */
    public String getDis() {
        return dis;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method sets the value of the database column user.dis
     *
     * @param dis the value for user.dis
     *
     * @mbg.generated
     */
    public void setDis(String dis) {
        this.dis = dis == null ? null : dis.trim();
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table user
     *
     * @mbg.generated
     */
    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append(getClass().getSimpleName());
        sb.append(" [");
        sb.append("Hash = ").append(hashCode());
        sb.append(", id=").append(id);
        sb.append(", name=").append(name);
        sb.append(", password=").append(password);
        sb.append(", mobile=").append(mobile);
        sb.append(", age=").append(age);
        sb.append(", dis=").append(dis);
        sb.append(", serialVersionUID=").append(serialVersionUID);
        sb.append("]");
        return sb.toString();
    }
}

UserMapper.xml

<?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.wangs.mapper.UserMapper">
  <resultMap id="BaseResultMap" type="com.wangs.model.User">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    <id column="id" jdbcType="VARCHAR" property="id" />
    <result column="name" jdbcType="VARCHAR" property="name" />
    <result column="password" jdbcType="VARCHAR" property="password" />
    <result column="mobile" jdbcType="VARCHAR" property="mobile" />
    <result column="age" jdbcType="INTEGER" property="age" />
    <result column="dis" jdbcType="VARCHAR" property="dis" />
  </resultMap>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.String">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    delete from user
    where id = #{id,jdbcType=VARCHAR}
  </delete>
  <insert id="insert" parameterType="com.wangs.model.User">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    <selectKey keyProperty="id" order="AFTER" resultType="java.lang.String">
      SELECT LAST_INSERT_ID()
    </selectKey>
    insert into user (`name`, `password`, mobile, 
      age, dis)
    values (#{name,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR}, #{mobile,jdbcType=VARCHAR}, 
      #{age,jdbcType=INTEGER}, #{dis,jdbcType=VARCHAR})
  </insert>
  <update id="updateByPrimaryKey" parameterType="com.wangs.model.User">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    update user
    set `name` = #{name,jdbcType=VARCHAR},
      `password` = #{password,jdbcType=VARCHAR},
      mobile = #{mobile,jdbcType=VARCHAR},
      age = #{age,jdbcType=INTEGER},
      dis = #{dis,jdbcType=VARCHAR}
    where id = #{id,jdbcType=VARCHAR}
  </update>
  <select id="selectByPrimaryKey" parameterType="java.lang.String" resultMap="BaseResultMap">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    select id, `name`, `password`, mobile, age, dis
    from user
    where id = #{id,jdbcType=VARCHAR}
  </select>
  <select id="selectAll" resultMap="BaseResultMap">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    select id, `name`, `password`, mobile, age, dis
    from user
  </select>
</mapper>