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Jetty例子

    博客分类：
  • java
ServletAjaxHTMLJavaScript
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import java.io.IOException;
import java.io.PrintWriter;

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

import org.mortbay.util.ajax.Continuation;
import org.mortbay.util.ajax.ContinuationSupport;

public class Time extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public Time() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		PrintWriter out = response.getWriter();
		response.setContentType("text/html");
		Continuation cc = ContinuationSupport
		.getContinuation(request, null);
		System.out.println(cc);

		while (true) {
		
			cc.suspend(2000); // suspend the response
		
			String jscript = "<script type=\"text/javascript\">  document.write('你好'); </script>";
			out.println(jscript);
			out.flush();
			System.out.println("Test");
		}
		// out
		// .println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01
		// Transitional//EN\">");
		// out.println("<HTML>");
		// out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
		// out.println(" <BODY>");
		// out.print(" This is ");
		// out.print(this.getClass());
		// out.println(", using the GET method");
		// out.println(" </BODY>");
		// out.println("</HTML>");
		// out.flush();
		// out.close();
	}

	/**
	 * The doPost method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to
	 * post.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		out
				.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
		out.println("<HTML>");
		out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");
		out.println("  <BODY>");
		out.print("    This is ");
		out.print(this.getClass());
		out.println(", using the POST method");
		out.println("  </BODY>");
		out.println("</HTML>");
		out.flush();
		out.close();
	}

	/**
	 * Initialization of the servlet. <br>
	 * 
	 * @throws ServletException
	 *             if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
 
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