利用mybatis-generator自動生成JAVA的實體類和mapping等
一:引入mybatis-generator-core jar包
我的測試專案是使用的maven,pom.xml對應如下:
<!-- Mybatis Generator -->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.2</version>
<!-- <scope>compile</scope>
<optional>true</optional> -->
</dependency>
jar包截圖如下:
二、配置generatorConfig.xml檔案
<?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>
<!-- 資料庫驅動-->
<!-- 因為生成過程中需要連線db,所以此處要指定驅動jar包的位置 -->
<classPathEntry location="E:\Work\maven-jar\mysql\mysql-connector-java\5.1.29\mysql-connector-java-5.1.29-sources.jar"/>
<context id="DB2Tables" targetRuntime="MyBatis3">
<commentGenerator>
<property name="suppressDate" value="true"/>
<!-- 是否去除自動生成的註釋 true:是 : false:否 -->
<property name="suppressAllComments" value="true"/>
</commentGenerator>
<!--資料庫連結URL,使用者名稱、密碼 -->
<!-- jdbc:mysql://10.182.254.154:3306/auapdevconfig?useUnicode=true&characterEncoding=utf8 -->
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8" userId="root"
password="admin">
</jdbcConnection>
<javaTypeResolver>
<property name="forceBigDecimals" value="false"/>
</javaTypeResolver>
<!-- 生成模型的包名和位置-->
<javaModelGenerator targetPackage="testwebapp.com.wangzuojia.entity" targetProject="src">
<property name="enableSubPackages" value="true"/>
<property name="trimStrings" value="true"/>
</javaModelGenerator>
<!-- 生成對映檔案的包名和位置-->
<sqlMapGenerator targetPackage="testwebapp.com.wangzuojia.mapping" targetProject="src">
<property name="enableSubPackages" value="true"/>
</sqlMapGenerator>
<!-- 生成DAO的包名和位置-->
<javaClientGenerator type="XMLMAPPER" targetPackage="testwebapp.com.wangzuojia.dao" targetProject="src">
<property name="enableSubPackages" value="true"/>
</javaClientGenerator>
<!-- 要生成的表 tableName:資料庫中的表名或檢視名 domainObjectName:實體類名-->
<table tableName="t_sequence"
domainObjectName="Sequence" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table>
</context>
</generatorConfiguration>
三、寫一個main方法讀取第二步我們配置的generatorConfig.xml生產相應的entity、mapping和dao
package testwebapp;
import java.io.File;
import java.io.IOException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.exception.InvalidConfigurationException;
import org.mybatis.generator.exception.XMLParserException;
import org.mybatis.generator.internal.DefaultShellCallback;
public class MybatisGeneratorTest {
public static void main(String[] args)
throws IOException, XMLParserException, InvalidConfigurationException, SQLException, InterruptedException {
List<String> warnings = new ArrayList<String>();
boolean overwrite = true;
//讀取配置檔案generatorConfig.xml
File configFile
= new File("src/main/resources/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);
for (String s : warnings) {
System.out.println(s);
}
}
}
四、執行main方法後的結果