自己写框架

import java.io.BufferedReader;
……………………

public class CommandManager
{
     private Executor executor = null; // 记录当前使用的执行者对象
     public static String dbstate = ""; // 记录当前执行的数据库的种类
     private boolean isContinue = true; // 标示是否可以继续下一步的执行。
     public CommandManager()
     {
         super();
     }
……………………
Properties properties = loadPropertiesFile("configure/executor.map");
              String classNameAndMesg = null;
              int indexDivid = 0;
              classNameAndMesg = properties.getProperty(commandString);
              try
              {
                   indexDivid = classNameAndMesg.indexOf(",");
              } catch (NullPointerException e)
              {
                   properties = loadPropertiesFile("configure/executor.map");
                   Enumeration names = properties.propertyNames();
                   System.out.print("您的输入有误！  目前支持的数据有：");
                   while (names.hasMoreElements())
                   {
                       System.out.print(names.nextElement().toString() + "  ");
                   }
                   this.isContinue = false;
                   return "";
              }
              String executorClassName = null;
              if (indexDivid == -1)
              {
                   executorClassName = classNameAndMesg;
              } else
              {
                   executorClassName = classNameAndMesg.substring(0, indexDivid);
              }
              Class executorClass = null;
              try
              {
                   executorClass = Class.forName(executorClassName);
              } catch (ClassNotFoundException e)
              {
                   System.out.print("找不到需要的类，出现程序异常，可能是配置文件出现错误！请重新安装程序！");
                   this.isContinue = false;
                   return "";
              }
              try
              {
                   setExecutor((Executor) executorClass.newInstance());
              } catch (InstantiationException e)
              {
                   System.out.print("程序级异常,类型初始化异常！请重新安装程序！");
                   this.isContinue = false;
                   return "";
              } catch (IllegalAccessException e)
              {
                   // TODO
                   e.printStackTrace();
              } catch (ClassCastException e)
              {
                   System.out.print("类型转换出现异常，可能是配置文件出现错误！请重新安装程序！");
                   this.isContinue = false;
                   return "";
              }