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需要用到两个mybatis的generator和mysql驱动两个jar包,将这两个jar包添加为依赖。(例:mybatis-generator-core-1.3.5.jar,mysql-connector-java-5.1.45-bin.jar)
配置generatorConfig.xml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>
<context id="testTables" targetRuntime="MyBatis3">
<commentGenerator>
<!-- 是否去除自动生成的注释 true:是 : false:否 -->
<property name="suppressAllComments" value="true" />
</commentGenerator>
<!--数据库连接的信息:驱动类、连接地址、用户名、密码 -->
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/elec"
userId="root"
password="2018">
</jdbcConnection>
<!--下为oracle数据库-->
<!-- <jdbcConnection driverClass="oracle.jdbc.OracleDriver" connectionURL="jdbc:oracle:thin:@127.0.0.1:1521:yycg"
userId="yycg" password="yycg"> </jdbcConnection> -->
<!-- 默认false,把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer,为 true时把JDBC DECIMAL
和 NUMERIC 类型解析为java.math.BigDecimal -->
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!-- targetProject:生成PO类的位置 -->
<javaModelGenerator targetPackage="com.itszt.domain"
targetProject=".\src">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false" />
<!-- 从数据库返回的值被清理前后的空格 -->
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!-- targetProject:mapper映射文件生成的位置 -->
<!--<sqlMapGenerator targetPackage="com.itszt.mapper"-->
<!--targetProject=".\src">-->
<!--<!– enableSubPackages:是否让schema作为包的后缀 –>-->
<!--<property name="enableSubPackages" value="false" />-->
<!--</sqlMapGenerator>-->
<!--<!– targetPackage:mapper接口生成的位置 –>-->
<!--<javaClientGenerator type="XMLMAPPER"-->
<!--targetPackage="com.itszt.mapper" targetProject=".\src">-->
<!--<!– enableSubPackages:是否让schema作为包的后缀 –>-->
<!--<property name="enableSubPackages" value="false" />-->
<!--</javaClientGenerator>-->
<!-- 指定数据库表 -->
<table tableName="%"></table>
<!--<table tableName="t_order"></table>-->
<!--<table tableName="goods"></table>-->
</context>
</generatorConfiguration>
核心操作类:
import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
/**
* 工具类,将数据库中的表批量映射为对象
*/
public class Test {
public static void main(String[] args) throws Exception{
try {
List<String> warnings = new ArrayList<String>();
boolean overwrite = true;
File configFile = new File("generatorConfig.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);
System.out.println("映射成功");
} catch (Exception e) {
System.out.println("映射失败");
e.printStackTrace();
}
}
}