package cn.ksource.core.util;

import java.io.PrintWriter;

import javax.servlet.http.HttpServletResponse;

public class ScriptUtil {

	private static void doAlert(HttpServletResponse response,String script){
		try {
			response.setContentType("text/html");
			response.setCharacterEncoding("gbk");
			PrintWriter writer = response.getWriter();
			writer.print(script);
			writer.flush();
			writer.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	/**
	 * 功能描述：在客户端生成一个alert，并将当前页面转向指定的path<BR>
	 * @param alert 要警告的话
	 * @param path 转向路径
	 * @return
	 * @author:杨凯<BR>
	 * 时间：Mar 3, 2009 11:33:26 PM<BR>
	 */
	public static void alertAnd2Url(HttpServletResponse response,String alert,String path){
		String script = "<script>alert('"+ alert +"');location.href='"+path+"'</script>";
		doAlert(response, script);
	}
	
	/**
	 * 功能描述：在客户端生成Alert，并将指定的窗口，导向指定的地址<BR>
	 * @param response
	 * @param window
	 * @param alert
	 * @param path
	 * @author:杨凯<BR>
	 * 时间：Jun 4, 2009 4:57:46 PM<BR>
	 */
	public static void alertAnd2Url(HttpServletResponse response,String window,String alert,String path){
		String script = "<script>alert('"+ alert +"');"+window+".location.href='"+path+"'</script>";
		doAlert(response, script);
	}
	
	/**
	 * 功能描述：将页面导向指定的URL<BR>
	 * @param response
	 * @param path
	 * @author:杨凯<BR>
	 * 时间：Jun 4, 2009 5:04:46 PM<BR>
	 */
	public static void goUrl(HttpServletResponse response,String path){
		String script = "<script>location.href='"+path+"'</script>";
		doAlert(response, script);
	}
	
	/**
	 * 功能描述：在客户端生成一个alert<BR>
	 * @param alert
	 * @return
	 * @author:杨凯<BR>
	 * 时间：Jun 4, 2009 11:15:06 AM<BR>
	 */
	public static void alert(HttpServletResponse response,String alert){
		String script = "<script>alert('"+ alert +"');</script>";
		doAlert(response, script);
	}
	
	/**
	 * 功能描述：在客户端生成一个alert,并将页面后退<BR>
	 * @param alert
	 * @return
	 * @author:杨凯<BR>
	 * 时间：Mar 23, 2009 3:08:41 PM<BR>
	 */
	public static void alertAndGoBack(HttpServletResponse response,String alert){
		String script = "<script>alert('"+ alert +"');history.go(-1);</script>";
		doAlert(response, script);
	}
	
	public static void doScript(HttpServletResponse response, String scriptString) {
		String script = "<script type=\"text/javascript\">"+ scriptString +"</script>";
		doAlert(response, script);
	}
}