Servlet代码：
package com.lab;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.Servlet;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet(name = "/HoroscopeServlet",urlPatterns = "/HoroscopeServlet" )
public class HoroscopeServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String username = request.getParameter("name");
int a = Integer.parseInt(request.getParameter("sex"));
int b = Integer.parseInt(request.getParameter("Zodiac"));
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<html><head>");
out.println("<script type=\"text/javascript\">");
out.println("function displayHoroscope(g, s){");
out.println("if(g==0){");
out.println("if((g+s)<=6) alert(\"You will have a long life.\");");
out.println("else alert(\"You will have a rich life.\");}");
out.println("if(g==1){");
out.println("if((g+s)<=6) alert(\"You will find a tall handsome stranger.\");");
out.println("else alert(\"You will have six children.\");}}");
out.println("</script></head>");
out.println("<body onload=\"displayHoroscope("+a+", "+b+")\">");
out.println("</body></html>");
}
}
web.xml里的配置
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>KKK</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>servlet/HoroscopeServlet</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>HoroscopeServlet.html</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>HoroscopeServlet</servlet-name>
<servlet-class>HoroscopeServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>HoroscopeServlet</servlet-name>
<url-pattern>horoscopeservlet"</url-pattern>
</servlet-mapping>
</web-app>
html代码
<html>
<head>
<title>lab3</title>
<script type = “text/javascript">
function validate(){
if (document.form[0].elements[0].value=="")
{
alert("please enter your name");
return false;
}
if (/^[a-zA-Z]+$/.test(document.forms[0].elements[0].value.charAt(0))==false)
{
alert("your name is wrong");
return false;
}
if(/[A-Z]/.test(document.forms[0].elements[0].value.charAt(0))==false)
{
alert("your name must start with a captial letter");
return false;
}
var bFlag = false;
var gender = document.getElementsByName("sex");
for ( var i = 0; i <= gender.length; i++)
{
if(gender[i].checked)
{
bFlag = true;
break;
}
}
if(bFlag == false)
{
alert("please choose your sex");
return false;
}
return true;
}
</script>
</head> <body>
<form action = “/HoroscopeServlet" method = "get" onsubmit="return validate()">
Input your name :
<input type="text" name="name">
<br><br>
Input your sex :
<input type="radio" name="sex" value = "0">Male
<input type="radio" name="sex" value = "1">Female
<br><br>
Select your Zodiac sign:
<select name="Zodiac">
<option value="0">Aries</option>
<option value="1">Taurus</option>
<option value="2">Gemini</option>
<option value="3">Cancer</option>
<option value="4">Leo</option>
<option value="5">Virgo</option>
<option value="6">Libra</option>
<option value="7">Scorpio</option>
<option value="8">Sagittarius</option>
<option value="9">Capricorn</option>
<option value="10">Aquarius</option>
<option value="11">Pisces</option>
</select>
<br><br>
<input type="submit" value="Submit">
<input type="reset" value="Reset">
</form>
</html>
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