SpringBoot学习笔记 #MyBatis的配置#

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最新推荐文章于 2022-12-31 23:51:50 发布

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分类专栏： #SpringBoot学习笔记# 文章标签： SpringBoot MyBatis配置 Mybatis-generator

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本文详细介绍了如何在SpringBoot项目中配置和使用MyBatis，包括添加数据库相关依赖、配置MyBatis、自动生成代码工具的使用，以及如何通过Maven插件实现代码自动生成。

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SpringBoot学习笔记

一，MyBatis的配置

** 1.在pom.xml添加数据库相关依赖**

    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.41</version>
    </dependency>
    <!--引入阿里巴巴德鲁伊的连接池依赖-->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.1.9</version>
    </dependency>
    <!--添加mybatis的依赖-->
    <dependency>
      <groupId>org.mybatis.spring.boot</groupId>
      <artifactId>mybatis-spring-boot-starter</artifactId>
      <version>1.3.1</version>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>

 <!--引入数据库的相关依赖-->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.41</version>
    </dependency>
    <!--引入阿里巴巴德鲁伊的连接池依赖-->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.1.9</version>
    </dependency>
    <!--添加mybatis的依赖-->
    <dependency>
      <groupId>org.mybatis.spring.boot</groupId>
      <artifactId>mybatis-spring-boot-starter</artifactId>
      <version>1.3.1</version>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>

2.添加MyBatis的配置

(1).在application.properties文件里面添加

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

(2).在resources下新建一个名为mapping的文件夹，用于存放生成数据库的字段

3.在pom.xml中添加MyBatis自动生成工具依赖----mybatis-generator

        <!--添加mybatis-generator自动生成工具的依赖-->
        <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>1.3.2</version>
            </dependency>
            <!--对数据库进行解析-->
            <dependency>
              <groupId>mysql</groupId>
              <artifactId>mysql-connector-java</artifactId>
              <version>5.1.47</version>
            </dependency>
          </dependencies>
          <executions>

            <execution>
              <!--名字-->
              <id>mybatis-generator</id>
              <!--阶段-->
              <phase>package</phase>
              <goals>
                <!--目的-->
                <goal>generate</goal>
              </goals>
            </execution>
          </executions>
          <configuration>
            <!--自动生成文件可移动-->
            <verbose>true</verbose>
            <!--自动覆盖生成文件！！谨慎！！-->
            <overwrite>true</overwrite>
            <!--generator生成工具的配置文件路径-->
            <configurationFile>
              src/main/resources/mybatis-generator.xml
            </configurationFile>
          </configuration>
        </plugin>

3.编mybatis-generator的配置文件（在官网可下）
(1)在resources中新建一个名为mybatis-generator.xml的文件

<?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>
    <!--<classPathEntry-->
        <!--location="C:/Oracle/Middleware/wlserver_10.3/server/lib/ojdbc6.jar"/>-->
    <context id="MBG" targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressDate" value="false"/>
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>


        <!--数据库的连接地址账号密码-->
        <jdbcConnection
            driverClass="com.mysql.jdbc.Driver"
            connectionURL="jdbc:mysql://127.0.0.1:3306/eleba"
            userId="root"
            password="eleba123"/>


        <!--生成DataObject类的存放位置-->
        <javaModelGenerator targetPackage="elebaproject.dataobject"
            targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>

        <!--生成映射文件存放位置-->
        <sqlMapGenerator targetPackage="mapping"
            targetProject="src/main/resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>

        <!--生成Dao类存放位置-->
        <javaClientGenerator targetPackage="elebaproject.dao"
            targetProject="src/main/java/" type="XMLMAPPER">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>

        <!--生成对应表及类名
        enableCountByExample="false"
        enableUpdateByExample="false"
        enableDeleteByExample="false"
        enableSelectByExample="false"
        selectByExampleQueryId="false"
        这几个是设置不生成自带复杂查询，只使用简单查询sql语句
        -->
        <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>

4.新建一个bybatis-generator的Maven启动项用于生成入口
在这里插入图片描述

Run一下之后就会自动生成相关文件
在这里插入图片描述

最终整个pom.xml文件内容为

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>elebaproject</groupId>
  <artifactId>eleba</artifactId>
  <version>1.0-SNAPSHOT</version>


  <name>eleba</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.5.RELEASE</version>
  </parent>

  <repositories>
    <repository>
      <id>getui-nexus</id>
      <url>http://mvn.gt.igexin.com/nexus/content/repositories/releases/</url>
    </repository>
  </repositories>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
  </properties>

  <dependencies>
    <!--引入自定义属性数据依赖-->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-configuration-processor</artifactId>
      <optional>true</optional>
    </dependency>

    <!--引入web项目的依赖-->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <!--引入数据库的相关依赖-->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.41</version>
    </dependency>
    <!--引入阿里巴巴德鲁伊的连接池依赖-->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.1.9</version>
    </dependency>
    <!--添加mybatis的依赖-->
    <dependency>
      <groupId>org.mybatis.spring.boot</groupId>
      <artifactId>mybatis-spring-boot-starter</artifactId>
      <version>1.3.1</version>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>

    <!--个推的依赖-->
    <dependency>
      <groupId>com.gexin.platform</groupId>
      <artifactId>gexin-rp-sdk-http</artifactId>
      <version>4.1.0.1</version>
    </dependency>

  </dependencies>

  <build>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-jar-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
        <!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
        <plugin>
          <artifactId>maven-site-plugin</artifactId>
          <version>3.7.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-project-info-reports-plugin</artifactId>
          <version>3.0.0</version>
        </plugin>
        <!--添加mybatis-generator自动生成工具的依赖-->
        <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>1.3.2</version>
            </dependency>
            <!--对数据库进行解析-->
            <dependency>
              <groupId>mysql</groupId>
              <artifactId>mysql-connector-java</artifactId>
              <version>5.1.47</version>
            </dependency>
          </dependencies>
          <executions>

            <execution>
              <!--名字-->
              <id>mybatis-generator</id>
              <!--阶段-->
              <phase>package</phase>
              <goals>
                <!--目的-->
                <goal>generate</goal>
              </goals>
            </execution>
          </executions>
          <configuration>
            <!--自动生成文件可移动-->
            <verbose>true</verbose>
            <!--自动覆盖生成文件！！谨慎！！-->
            <overwrite>true</overwrite>
            <!--generator生成工具的配置文件路径-->
            <configurationFile>
              src/main/resources/mybatis-generator.xml
            </configurationFile>
          </configuration>
        </plugin>



      </plugins>
    </pluginManagement>
  </build>
</project>

整个mybatis-generator.xml文件为

<?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="C:/Oracle/Middleware/wlserver_10.3/server/lib/ojdbc6.jar"/>-->
    <context id="MBG" targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressDate" value="false"/>
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>


        <!--数据库的连接地址账号密码-->
        <jdbcConnection
            driverClass="com.mysql.jdbc.Driver"
            connectionURL="jdbc:mysql://127.0.0.1:3306/eleba" userId="root"
            password=""/>


        <!--生成DataObject类的存放位置-->
        <javaModelGenerator targetPackage="elebaproject.dataobject"
            targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>

        <!--生成映射文件存放位置-->
        <sqlMapGenerator targetPackage="mapping"
            targetProject="src/main/resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>

        <!--生成Dao类存放位置-->
        <javaClientGenerator targetPackage="elebaproject.dao"
            targetProject="src/main/java/" type="XMLMAPPER">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>


        <!--生成对应表及类名
        enableCountByExample="false"
        enableUpdateByExample="false"
        enableDeleteByExample="false"
        enableSelectByExample="false"
        selectByExampleQueryId="false"
        这几个是设置不生成自带复杂查询，只使用简单查询sql语句

        -->
        <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>