parseinput.java

Java 议程管理系统。使用GoF设计模式进行系统设计

/**
 * 
 */
package agenda.ctrl;

import java.text.SimpleDateFormat;
import java.util.*;

/**
 * @author Cyberpet
 * 
 */
public class ParseInput {

	public Date StingToDate(String str) {
		// Create a date formatter that can parse dates of
		// the form mm-dd-yyyy.
		SimpleDateFormat bartDateFormat = new SimpleDateFormat("MM-dd-yyyy");
		// Create a string containing a text date to be parsed.
		// String dateStringToParse = "9-29-2001";
		Date date = null;
		try {
			date = bartDateFormat.parse(str);
		} catch (Exception ex) {
			System.out.println(ex.getMessage());
		}
		return date;
	}

	/**
	 * trim extension method
	 * 
	 * @param filename
	 * @return
	 * @return String
	 */
	public String trimExtension(String filename) {
		if ((filename != null) && (filename.length() > 0)) {
			int i = filename.lastIndexOf('.');
			if ((i > -1) && (i < (filename.length()))) {
				return filename.substring(0, i);
			}
		}
		return filename;
	}

	public String getCmd(String str) {
		return str.split("\\s", 2)[0];
	}

	public String[] getArgs(String str) {
		if (str.length() != this.getCmd(str).length()) {
			String tmp = str.substring(this.getCmd(str).length() + 1)
					.toLowerCase();
			return tmp.split("\\s");
		} else
			return new String[0];
	}

	/**
	 * static class for Singleton design pattern, instance of ParseInput will be
	 * created when the first time you make a call to ParseInput.getInstance
	 * 
	 * @author Cyberpet
	 * @see ParseInput#getInstance()
	 */
	static class ParseInputSingletonHolder {
		static ParseInput instance = new ParseInput();
	}

	/**
	 * get the only instance of ParseInput
	 * 
	 * @return ParseInput
	 * @see ParseInput
	 */
	public static ParseInput getInstance() {
		return ParseInputSingletonHolder.instance;
	}

	/**
	 * @param args
	 * @return void
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		System.out.println(ParseInput.getInstance().getCmd("register a b"));
		String[] tmp = ParseInput.getInstance().getArgs("register a b");
		for (String str : tmp)
			System.out.println(str);
	}

}