JSP学习 Hello world问题解决
Servlet在浏览器中的输出第一次：guest/test目录不存在
原因是web.xml没有被正确解析，修改之
第二次：HTTP method get is not supperted by this URL
（继承自httpservlet的servlet没有重写对于请求和相应的处理方法，doget或dopost登方法，默认调用父类的doget和dopost方法）
解决办法：
1：子类重写doget和dopost方法
2：在扩展的servlet中重写doget或dopost方法或在处理时不调用父类的doget和dopost方法
package station.guest;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 Users extends HttpServlet { @Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {// TODO Auto-generated method stub//super.doGet(req, resp);PrintWriter out = resp.getWriter();out.print("hello money");}}
配置文件
<?xml version="1.0" encoding="iso-8859-1"?><!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd"><web-app xmlns="http://java.sun.com/xml/ns/j2ee" version="2.4" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http:/java.sun.com/dtd/web-app_2_3.dtd"><servlet><servlet-name>user</servlet-name><display-name>users </display-name><servlet-class>station.guest.Users</servlet-class></servlet><servlet-mapping><servlet-name>user</servlet-name><url-pattern>/test/* </url-pattern></servlet-mapping></web-app>
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