Mybatis generator配置

系统管理员 2022-05-27 12:19 146阅读 0赞

## 使用Mybatis generator批量产生mapper代码文件 ##

在用spring boot添加mybatis时，可以使用mybatis generator自动产生代码．

*  修改`<classPathEntry>`中数据库链接驱动
 *  在`<jdbcConnection>`中配置数据库链接
 *  在`<javaModelGenerator>`中配置目标包路径和文件夹路径
 *  在`<sqlMapGenerator>`中配置产生的sql map文件存放路径和包
 *  在`<javaClientGenerator>`中配置产生的接口代码
 *  配置需要扫描的表`<table>`
 *  运行

java -jar mybatis-generator-core-x.x.x.jar -configfile /tmp/generatorConfig.xml -overwrite

模板文件

<?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="/home/chenyu/.m2/repository/mysql/mysql-connector-java/5.1.35/mysql-connector-java-5.1.35.jar" />
    
      <context id="DB2Tables" targetRuntime="MyBatis3">
        <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://127.0.0.1/wt" userId="wt" password="wt">
        </jdbcConnection>
    
        <javaTypeResolver >
          <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>
    
        <javaModelGenerator targetPackage="com.example.demo.model2" targetProject="/src/main/java">
          <property name="enableSubPackages" value="true" />
          <property name="trimStrings" value="true" />
        </javaModelGenerator>
    
        <sqlMapGenerator targetPackage="mapping" targetProject="/src/main/resources">
          <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>
    
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.example.demo.mapper" targetProject="/src/main/java">
          <property name="enableSubPackages" value="true" />
        </javaClientGenerator>
    
    
        <table tableName="user_info" domainObjectName="UserInfo" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false">
                <generatedKey column="uid" sqlStatement="select replace(uuid(), '-', '')"></generatedKey>
        </table>
        
    
      </context>
    </generatorConfiguration>

#### 添加mvn运行环境 ####

运行方式

mvn mybatis-generator:generate
    # 或者
    mvn -Dmybatis.generator.overwrite=true mybatis-generator:generate

如果需要在编译时自动运行，应该做如下配置

<project ...>
         ...
         <build>
           ...
           <plugins>
            ...
            <plugin>
              <groupId>org.mybatis.generator</groupId>
              <artifactId>mybatis-generator-maven-plugin</artifactId>
              <version>1.3.5</version>
              <executions>
                <execution>
                  <id>Generate MyBatis Artifacts</id>
                  <goals>
                    <goal>generate</goal>
                  </goals>
                </execution>
              </executions>
            </plugin>
            ...
          </plugins>
          ...
        </build>
        ...
      </project>

### 在添加使用mapper.xml文件后，需要添加配置文件，让spring组件扫描\*.xml文件 ###

mybatis:
      mapper-locations: classpath:mapping/*.xml
      type-aliases-package: com.example.demo