java Servlet(1)
Web.xmlファイル:
index.jsp
MyServlet:
<?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>
<description>This is the description of my J2EE component</description>
<display-name>This is the display name of my J2EE component</display-name>
<servlet-name>MyServlet</servlet-name>
<servlet-class>MyServlet</servlet-class>
<init-param>
<param-name>encoding</param-name>
<param-value>GB2312</param-value>
</init-param>
<init-param>
<param-name>corpname</param-name>
<param-value> </param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>MyServlet</servlet-name>
<url-pattern>*.ddd</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<form action="http://localhost:8080/Hello/aa.ddd" method="post">
title:<input type="text" name="title"></input> <br/>
content:<textarea rows="3" cols="5" name="content"></textarea> <br/>
<input type="submit" name=" " />
</form>
</html>
MyServlet:
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class MyServlet extends HttpServlet {
private ServletConfig config;
private String encoding;
private String corpname;
/**
* Constructor of the object.
*/
public MyServlet() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
@SuppressWarnings("unchecked")
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String url=request.getRequestURI();
String ip=request.getRemoteAddr();
/*
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.print(" This is ");
out.print(this.getClass());
out.println(", using the GET method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
*/
response.setHeader("Content-Type","text/html;charset="+encoding);
OutputStream ops=response.getOutputStream();
ops.write((" ！"+corpname).getBytes());
ops.write((url+"<br/>").getBytes());
ops.write((ip+"<br/>").getBytes());
//String path=getServletConfig().getServletContext().getRealPath("/aa.ddd");
//ops.write((path+"<br/>").getBytes());
//response.setHeader("refresh", "5;url=www.baidu.com");
Enumeration enumHeaders=request.getHeaderNames();
while(enumHeaders.hasMoreElements()){
String headerName=(String)enumHeaders.nextElement();
String headerValue=request.getHeader(headerName);
ops.write((headerName+":"+headerValue+"<br/>").getBytes());
}
//
InputStream ips=request.getInputStream();
ByteArrayOutputStream opps=new ByteArrayOutputStream();
streamCopy(ips,opps);
byte []result=opps.toByteArray();
System.out.println(new String(result));
}
private void streamCopy(InputStream ips, ByteArrayOutputStream opps) throws IOException {
// TODO Auto-generated method stub
byte []buf=new byte[1024];
int len=0;
while((len=ips.read(buf))!=-1){
opps.write(buf,0,len);
}
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request,response);
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init(ServletConfig config) throws ServletException {
// Put your code here
this.config=config;
encoding=config.getInitParameter("encoding");
corpname=config.getInitParameter("corpname");
}
}