cmdhome.java

来自「一个简单的EJB实例.用DB2连接.JSP页面.很好用.供大家学习」· Java 代码 · 共 52 行

package com.xyz.command;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @author Mauget
 */
public class CmdHome implements ICommand {

	/**
	 * @see com.xyz.command.ICommand#execute(HttpServletRequest, HttpServletResponse)
	 */
	public String execute(
		HttpServletRequest request,
		HttpServletResponse response)
		throws ServletException, IOException {

		String zipCode = getCookieValue(request, cookieName, "27703");
		request.setAttribute(cookieName, zipCode);

		return "default.jsp";
	}

	/**
	 * Returns cookie value if found, or
	 * supplied default value if not found.
	 * @param request javax.servlet.http.HttpServletRequest
	 * @param cookieName java.lang.String
	 * @param defaultValue java.lang.String
	 */
	private String getCookieValue(
		HttpServletRequest request,
		String cookieName,
		String defaultValue) {

		String value = defaultValue;
		Cookie[] cookies = request.getCookies();
		for (int index = 0; index < cookies.length; ++index) {
			Cookie cookie = cookies[index];
			if (cookieName.equals(cookie.getName()))
				value = cookie.getValue();
		}
		return value;
	}

}