MAVEN继承和聚合应用
继承：A project继承B project，可以将pom.xml的定义继承下来。
<parent>
<groupId>cn.xdl</groupId>
<artifactId>ydma-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
聚合：可以将多个project聚集在一起，统一操作。比如编译、打包等。
<modules>
<module>ydma-service-direction</module>
<module>ydma-service-course</module>
<module>ydma-service-user</module>
</modules>
使用MyBatisGenerator生成Entity、XML、Mapper代码
1.引入mybatis、mybatis-generator、mysql驱动
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.7</version>
</dependency>
2.添加mybatis generator配置文件mbg.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>
<!-- 指定数据库驱动包 -->
<classPathEntry location="C:\Users\Administrator\.m2\repository\mysql\mysql-connector-java\5.1.47\mysql-connector-java-5.1.47.jar" />
<!-- 指定数据库连接参数 -->
<context id="DB2Tables" targetRuntime="MyBatis3">
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/ydma"
userId="root"
password="123456">
</jdbcConnection>
<javaTypeResolver >
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!-- 指定pojo/entity类放在工程哪个位置 -->
<javaModelGenerator targetPackage="cn.xdl.ydma.entity" targetProject="./src/main/java">
<property name="enableSubPackages" value="true" />
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!-- 指定SQL定义的XML文件放在工程哪个位置 -->
<sqlMapGenerator targetPackage="cn.xdl.ydma.sql" targetProject="./src/main/resources">
<property name="enableSubPackages" value="true" />
</sqlMapGenerator>
<!-- 指定Mapper映射器接口放在工程哪个位置,type属性ANNOTATEDMAPPER(标注形式)、MIXEDMAPPER、XMLMAPPER(xml形式) -->
<javaClientGenerator type="ANNOTATEDMAPPER" targetPackage="cn.xdl.ydma.dao" targetProject="./src/main/java">
<property name="enableSubPackages" value="true" />
</javaClientGenerator>
<!-- 指定根据哪些表生成pojo、xml、mapper等文件 -->
<table tableName="%"
enableSelectByExample="false" enableDeleteByExample="false"
enableCountByExample="false" enableUpdateByExample="false">
<generatedKey column="ID" sqlStatement="mysql" identity="true" />
</table>
</context>
</generatorConfiguration>
3.加载mbg.xml配置文件启动
public class RunMyBatisGenerator {
public static void main(String[] args) throws Exception{
List<String> warnings = new ArrayList<String>();
boolean overwrite = true;
File configFile = new File("src/main/resources/mbg.xml");
ConfigurationParser cp = new ConfigurationParser(warnings);
Configuration config = cp.parseConfiguration(configFile);
DefaultShellCallback callback = new DefaultShellCallback(overwrite);
MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
myBatisGenerator.generate(null); } }
