mybatis generator

? ?簡稱MBG,是一個專門為mybatis框架使用者定制的代碼生成器.可以快速的根據表生成對應的映射文件，接口以及bean類。支持基本的增刪改查，以及QBC風格的條件查詢。但是表連接，存儲過程等這些復雜的sql定義需要我們手工編寫。

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逆向工程配置文件mbg.xml

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE generatorConfigurationPUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN""http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd"><generatorConfiguration><context id="DB2Tables" targetRuntime="MyBatis3"><!-- 指定如何連接到目標數據庫 --><jdbcConnection driverClass="oracle.jdbc.OracleDriver"connectionURL="jdbc:oracle:thin:@localhost:1521:orcl"userId="scott"password="123456"></jdbcConnection><javaTypeResolver ><property name="forceBigDecimals" value="false" /></javaTypeResolver><!-- javaModelGenerator:指定javaBean的生成策略 targetPackage=""目標包名targetProject=""目標工程 --><javaModelGenerator targetPackage="com.atChina.bean" targetProject=".\src"><property name="enableSubPackages" value="true" /><property name="trimStrings" value="true" /></javaModelGenerator><!-- sqlMapGenerator:sql映射生成策略 --><sqlMapGenerator targetPackage="com.atChina.dao" targetProject=".\conf"><property name="enableSubPackages" value="true" /></sqlMapGenerator><!-- javaClientGenerator:指定mapper接口所在的位置 --><javaClientGenerator type="XMLMAPPER" targetPackage="com.atChina.dao" targetProject=".\src"><property name="enableSubPackages" value="true" /></javaClientGenerator><table tableName="EMPTEST" domainObjectName="Employee"></table><table tableName="DEPTTEST" domainObjectName="Department"></table></context> </generatorConfiguration>

運行逆向生成器生成工程

? ? ? 運行逆向工程，有很多種方式，這里是根據上面配置的xml文件來運行逆向生成器生成工程

@Testpublic void testMbg() throws Exception{List<String> warnings = new ArrayList<String>();boolean overwrite = true;File configFile = new File("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);}

測試:

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@Testpublic void testMybatis3() throws IOException, ParseException{String resource = "mybatis-config.xml";InputStream ins = Resources.getResourceAsStream(resource);SqlSessionFactory sf = new SqlSessionFactoryBuilder().build(ins);SqlSession openSession = sf.openSession();try{EmployeeMapper mapper = openSession.getMapper(EmployeeMapper.class);EmployeeExample example = new EmployeeExample();Criteria criteria = example.createCriteria();criteria.andEmpnoLessThan((short)7499);Criteria criteria2 = example.createCriteria();criteria2.andJobLike("%ER%");example.or(criteria2);List<Employee> emps = mapper.selectByExample(example);for(Employee em : emps){System.out.println(em);}}finally{openSession.close();}}

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