📄 echoform.java
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//EchoForm.java:import javax.servlet.*;import javax.servlet.http.*;import java.io.*;import java.util.*;public class EchoForm extends HttpServlet{ public void service(HttpServletRequest req, HttpServletResponse res) throws IOException { res.setContentType("text/html"); PrintWriter out = res.getWriter(); Enumeration flds = req.getParameterNames(); if(!flds.hasMoreElements()) { out.print("<html>"); out.print("<form method=\"POST\"" +"action=\"EchoForm\">"); for(int i = 0; i < 10; i++) out.print("<b>Field" + i + "</b> " + "<input type=\"text\""+" size=\"20\" name=\"Field" + i + "\" value=\"Value" + i + "\"><br>"); out.print("<INPUT TYPE=submit name=submit Value=\"Submit\"></form></html>"); } else { out.print("<h1>Your form contained:</h1>"); while(flds.hasMoreElements()) { String field= (String)flds.nextElement(); String value= req.getParameter(field); out.print(field + " = " + value+ "<br>"); } } out.close(); }}⌨️ 快捷键说明
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