servlet基础(2)

        <url-pattern>/mars/firstTest</url-pattern> 
    </servlet-mapping> 
 
 
    <servlet> 
        <servlet-name>ServletTest2</servlet-name> 
        <servlet-class>com.mars.ServletTest2</servlet-class> 
    </servlet> 
    <servlet-mapping> 
        <servlet-name>ServletTest2</servlet-name> 
        <url-pattern>/ServletTest2</url-pattern> 
    </servlet-mapping> 
</web-app> 
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
 http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
 <servlet>
  <servlet-name>helloworld</servlet-name>
  <servlet-class>com.mars.ServletTest</servlet-class>
 </servlet>
 <servlet-mapping>
  <servlet-name>helloworld</servlet-name>
  <url-pattern>/helloworld</url-pattern>
 </servlet-mapping>
 <servlet-mapping>
  <servlet-name>helloworld</servlet-name>
  <url-pattern>/mars/firstTest</url-pattern>
 </servlet-mapping>

 <servlet>
  <servlet-name>ServletTest2</servlet-name>
  <servlet-class>com.mars.ServletTest2</servlet-class>
 </servlet>
 <servlet-mapping>
  <servlet-name>ServletTest2</servlet-name>
  <url-pattern>/ServletTest2</url-pattern>
 </servlet-mapping>
</web-app>

 

[java]
package com.mars; 
 
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; 
 
public class ServletTest extends HttpServlet { 
 
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) 
            throws ServletException, IOException { 
        PrintWriter out = resp.getWriter();