Java的MyBatis框架中MyBatis Generator代码生成器的用法

<?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="./lib/mysql-connector-java-5.1.26-bin.jar" />
  <context id="mybatisDemoForMysql" targetRuntime="MyBatis3">
    <!-- 控制注释 -->
    <commentGenerator>
      <!-- 是否去除所有自动生成的注释文件 -->
      <property name="suppressAllComments" value="true" />
      <!-- 是否去除所有自动生成的文件的时间戳，默认为false -->
      <property name="suppressDate" value="true" />
    </commentGenerator>
    <!-- 控制数据库 -->
    <jdbcConnection driverClass="com.mysql.jdbc.Driver"
      connectionURL="jdbc:mysql://127.0.0.1:3306/mybatis_db?characterEncoding=utf8"
      userId="root" password="david0110" />

    <javaTypeResolver>
      <!-- 把jdbc中的decimal与numberic类型转化为integer类型 -->
      <property name="forceBigDecimals" value="false" />
    </javaTypeResolver>
    <!-- 数据库表对应的model -->
    <javaModelGenerator targetPackage="david.model"
      targetProject="src">
      <property name="enableSubPackages" value="true" />
      <property name="trimStrings" value="true" />
    </javaModelGenerator>
    <!-- 控制Model的xmlMapper文件 -->
    <sqlMapGenerator targetPackage="david.mappers"
      targetProject="src">
      <property name="enableSubPackages" value="true" />
    </sqlMapGenerator>
    <!-- 控制mapper接口 -->
    <javaClientGenerator targetPackage="david.inter"
      type="XMLMAPPER" targetProject="src">
      <property name="enableSubPackages" value="true" />
      <property name="methodNameCalculator" value="extended" />
    </javaClientGenerator>
    <!-- schema你的数据库，tableName表明，domainObjectName对应你的javabean类名，是否生成相应的example -->
    <table schema="mybatis_db" tableName="visitor" domainObjectName="Visitor"
      enableCountByExample="false" enableUpdateByExample="false"
      enableDeleteByExample="false" enableSelectByExample="false"
      selectByExampleQueryId="false">
      <generatedKey column="id" sqlStatement="MySql" />
      <columnOverride column="name" property="visitor_name" />
      <ignoreColumn column="status" delimitedColumnName="false" />      
    </table>
  </context>
</generatorConfiguration>

private static void generateMbgConfiguration() {
    /*
     * Mybatis自带Generator工具生成相应东西
     */
    List<String> warnings = new ArrayList<String>();
    boolean overwrite = true;
    File configFile = new File("./src/david/mbg/mbg_configuration.xml");
    ConfigurationParser cp = new ConfigurationParser(warnings);
    Configuration config = null;
    try {
      config = cp.parseConfiguration(configFile);
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } catch (XMLParserException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    DefaultShellCallback callback = new DefaultShellCallback(overwrite);
    try {
      MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
      myBatisGenerator.generate(null);
    } catch (InvalidConfigurationException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } catch (SQLException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } catch (InterruptedException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }

    System.out.println("生成Mybatis配置成功！");
  }

/*
   * 查询访问者信息
   */
  public static void testGenerateAdd() {
    SqlSession session = MybatisUtils.getSqlSession();
    VisitorMapper vOperation = session.getMapper(VisitorMapper.class);
    Visitor visitor = new Visitor();
    visitor.setVisitor_name("hello2");
    visitor.setEmail("helloworld2@qq.com");
    visitor.setCreatetime(new Date());
    int count = vOperation.insert(visitor);
    session.commit();
    MybatisUtils.closeSession(session);
    MybatisUtils.showMessages(CRUD_Enum.Add, count);
  }

  /*
   * 查询访问者信息
   */
  public static void testGenerateQuery(int id) {
    SqlSession session = MybatisUtils.getSqlSession();
    VisitorMapper vOperation = session.getMapper(VisitorMapper.class);
    Visitor visitor = vOperation.selectByPrimaryKey(id);
    MybatisUtils.closeSession(session);
    MybatisUtils.showMessages(CRUD_Enum.Query, 1);
    System.out.println(visitor);
  }

  public static void testGenerateDelete(int id) {
    SqlSession session = MybatisUtils.getSqlSession();
    VisitorMapper vOperation = session.getMapper(VisitorMapper.class);
    int count = vOperation.deleteByPrimaryKey(id);
    session.commit();
    MybatisUtils.closeSession(session);
    MybatisUtils.showMessages(CRUD_Enum.Delete, count);
  }

  public static void testGenerateUpdate(int id) {
    SqlSession session = MybatisUtils.getSqlSession();
    VisitorMapper vOperation = session.getMapper(VisitorMapper.class);
    Visitor visitor = vOperation.selectByPrimaryKey(id);
    System.out.println(visitor);
    String name = visitor.getVisitor_name();
    if (name.contains("update")) {
      visitor.setVisitor_name(name.substring(0, name.indexOf("update")));
    } else {
      visitor.setVisitor_name(name + "update");
    }
    int count = vOperation.updateByPrimaryKey(visitor);
    session.commit();
    MybatisUtils.closeSession(session);
    MybatisUtils.showMessages(CRUD_Enum.Update, count);
    System.out.println(visitor);
  }