parseinput.java

RFC 1945 Http1.0协议实现。对协议进行了完整面向对象设计

/**
 * 
 */
package edu.sysu.http.util;


/**
 * @author Administrator
 *
 */
public class ParseInput {
	/**
	 * 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;
	}
	
	/**
	 * 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;
	}

}