[Project] - 如何引入mybatis

[TemplarJQ]

记录下引入mybatis和生成器的使用过程

[TemplarJQ]

首先引入connector

    <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>6.0.6</version>
    </dependency>

然后引入druid连接池和spring配置

    <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.1.10</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.mybatis.spring.boot/mybatis-spring-boot-starter -->
    <dependency>
      <groupId>org.mybatis.spring.boot</groupId>
      <artifactId>mybatis-spring-boot-starter</artifactId>
      <version>1.3.2</version>
    </dependency>

[TemplarJQ]

• 然后在application.properties文件下加入mapping的路径，并创建对应mapping目录

  mybatis.mapper-locations=classpath:mapping/*.xml

• 引入生成器的plugins

      <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>
          <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.37</version>
          </dependency>
        </dependencies>
        <executions>
          <execution>
            <id>mybatis generator</id>
            <phase>package</phase>
            <goals>
              <goal>generate</goal>
            </goals>
          </execution>
        </executions>
        <configuration>
          <!--允许移动生成文件-->
          <verbose>true</verbose>
          <!--允许自动覆盖-->
          <overwrite>false</overwrite>
          <configurationFile>
            src/main/resources/mybatis-generator.xml
          </configurationFile>
        </configuration>
      </plugin>

[TemplarJQ]

在resources/mybatis-generator.xml中编写

<?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>
    <!--JDBC驱动jar包的位置-->
    <!--<classPathEntry location="C:/workspace/project/learning/mybatis/lib/mysql-connector-java-5.1.6.jar"/>-->
    <context id="default" targetRuntime="MyBatis3">
        <!--创建Java类时是否取消生成注释-->
        <commentGenerator>
            <property name="suppressDate" value="true"/>
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>
        <!--JDBC数据库连接-->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://127.0.0.1:3306/migration"
                        userId="root"
                        password="buptljq1234">
        </jdbcConnection>
        <!--
        Model模型生成器,用来生成含有主键key的类，记录类 以及查询Example类
        targetPackage     指定生成的model生成所在的包名
        targetProject     指定在该项目下所在的路径
        -->
        <javaModelGenerator targetPackage="com.dataobject"
                            targetProject="src/main/java">
            <!-- 是否允许子包，即targetPackage.schemaName.tableName -->
            <property name="enableSubPackages" value="true"/>
            <!-- 是否对model添加构造函数 -->
            <!--<property name="constructorBased" value="true"/>-->
            <!-- 是否对类CHAR类型的列的数据进行trim操作 -->
            <property name="trimStrings" value="true"/>
            <!-- 建立的Model对象是否 不可改变  即生成的Model对象不会有 setter方法，只有构造方法 -->
            <!--<property name="immutable" value="false"/>-->
        </javaModelGenerator>
        <!--
        mapper映射文件生成所在的目录 为每一个数据库的表生成对应的SqlMap文件
        -->
        <sqlMapGenerator targetPackage="mapping"
                         targetProject="src/main/resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>

        <!--
        客户端代码，生成易于使用的针对Model对象和XML配置文件的代码
        type="ANNOTATEDMAPPER",生成Java Model和基于注解的Mapper对象
        type="MIXEDMAPPER",生成基于注解的Java Model和相应的Mapper对象
        type="XMLMAPPER",生成SQLMap XML文件和独立的Mapper接口
        -->
        <javaClientGenerator type="XMLMAPPER"
                             targetPackage="com.dao"
                             targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>

        <!--tables表及类名-->
        <table tableName="user_info" domainObjectName="UserDO"
               enableCountByExample="false" enableUpdateByExample="false"
               enableDeleteByExample="false" enableSelectByExample="false"
               selectByExampleQueryId="false">
        </table>
        <table tableName="user_password" domainObjectName="UserPasswordDO"
               enableCountByExample="false" enableUpdateByExample="false"
               enableDeleteByExample="false" enableSelectByExample="false"
               selectByExampleQueryId="false">
        </table>
    </context>
</generatorConfiguration>

[TemplarJQ]

修改配置信息后在navicat中设置新的数据库名称，编码为utf-8，utf8-unicode-ci

[TemplarJQ]

• 修改完数据库后进入Run-新增Maven配置，其命令行为mybatis-generator:generate
• 注意报错可能是pom配置数据源与connector连接池配置不匹配，需要改成8.0.1以上版本