FirstServlet.java
package com.helloweenvsfei.servlet;
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 FirstServlet extends HttpServlet {
public void doGet(HttpServletRequest request,HttpServletResponse response)
throws ServletException,IOException{
this.log("执行doGet方法...");
this.execute(request,response);
}
public void doPost(HttpServletRequest request,HttpServletResponse response)
throws ServletException,IOException{
this.log("执行doPost方法...");
this.execute(request,response);
}
@Override
public long getLastModified(HttpServletRequest request){
this.log("执行getLastModified方法");
return -1;
}
private void execute(HttpServletRequest request,HttpServletResponse response)
throws ServletException,IOException{
response.setCharacterEncoding("UTF-8");
request.setCharacterEncoding("UTF-8");
String requestURI=request.getRequestURI();
String method=request.getMethod();
String param=request.getParameter("param");
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.println("以"+method+"方式访问该页面。取到的param参数为:"+param+"<br/>");
out.println("<form action=‘"+requestURI+"‘method=‘get‘><input type=‘text‘name=‘param‘value=‘param string‘><input type=‘submit‘value=‘以GET方式查询页面"+requestURI+"‘></form>");
out.println("<form action=‘"+requestURI+"‘method=‘post‘><input type=‘text‘name=‘param‘value=‘param string‘><input type=‘submit‘value=‘以POST方式查询页面"+requestURI+"‘></form>");
out.println("<script>document.write(‘本页面最后更新时间:‘+document.lastModified);</script>");
out.println("</BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
}
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<servlet>
<servlet-name> FirstServlet</servlet-name>
<servlet-class>com.helloweenvsfei.servlet.FirstServlet</servlet-class>
<init-param>
<param-name>message</param-name>
<param-value>welcome to FirstServlet</param-value>
</init-param>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>FirstServlet</servlet-name>
<url-pattern>/servlet/FirstServlet</url-pattern>
<url-pattern>/servlet/FirstServlet.asp</url-pattern>
<url-pattern>/servlet/FirstServlet.php</url-pattern>
<url-pattern>/servlet/FirstServlet.jsp</url-pattern>
<url-pattern>/servlet/FirstServlet.aspx</url-pattern>
</servlet-mapping>
</web-app>
时间： 2024-10-30 05:36:14