Servlet--httpservletrequest, HttpServletResponse

HttpServletRequestObject

Example:

Package Com.zgy.servlet;

import java.io.IOException;

import Java.io.PrintWriter;

import java.util.Enumeration;

import javax.servlet.ServletException;

import Javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

Public class Testrequestservlet extends httpservlet{

@Override

protected void doget (httpservletrequest req, HttpServletResponse resp)

throws Servletexception, IOException {

Testgetnetinfo (req);

Testgeturl (REQ,RESP);

Testgetheader (REQ,RESP);

Testgetparameter (req);

}

void Testgetnetinfo (httpservletrequest req) {

System. out. println ("IP of client:"+req.getremoteaddr ());

System. out. println ("Port of Client:"+req.getremoteport ());

System. out. println ("Server IP:"+req.getlocaladdr ());

}

void Testgeturl (httpservletrequest req, HttpServletResponse resp) throws ioexception{

PrintWriter out = Resp.getwriter ();

Out.println ("Request method:"+req.getmethod () +"<br/>");

OUT.PRINTLN ("agreement:"+req.getscheme () +"<br/>");

Out.println ("Directory of Web Apps:"+req.getcontextpath () +"<br/>");

Out.println ("URI:"+req.getrequesturi () +"<br/>");

}

void testgetheader (httpservletrequest Req,httpservletresponse resp) {

String str = req.getheader ("Accept-language");

System. out. println ("Accept-language"+str);

Enumeration E = Req.getheadernames ();

while (E.hasmoreelements ()) {

System. out. println (E.nextelement ());

}

}

void Testgetparameter (httpservletrequest req) {

String u = req.getparameter ("uname");

String p = req.getparameter ("UPass");

System. out. println ("uname="+u);

System. out. println ("upass="+p);

}

}

SixHttpServletResponseObject

1, the composition of the response information

A) Response.getwriter ()// output text information

b) Response.getoutputstream ()// output non-textual information

2. the HttpServletResponse object gets a print stream that is the same object

Example:

Package com.zgy.servlet;

Import java.io.IOException;

Import Java.io.PrintWriter;

Import java.util.Enumeration;

Import javax.servlet.ServletException;

Import Javax.servlet.http.HttpServlet;

Import Javax.servlet.http.HttpServletRequest;

Import Javax.servlet.http.HttpServletResponse;

public class Testresponseservlet extends httpservlet{

@Override

protected void Doget (HttpServletRequest req, HttpServletResponse resp)

Throws Servletexception, IOException {

Resp.setheader ("Content-type", "TEXT/HTML;CHARSET=GBK");

Resp.setheader ("Content-type", "TEXT/XML;CHARSET=GBK");

Resp.setheader ("Content-type", "TEXT/PLAIN;CHARSET=GBK");

Resp.setcontenttype ("TEXT/HTML;CHARSET=GBK");

PrintWriter PW1 = Resp.getwriter ();

PrintWriter pw2 = Resp.getwriter ();

Pw2.println ("<man><name> Kobe Bryant </name><job> play basketball </job> </man> ");

System.out.println (PW1 = = PW2);

}

}

Servlet--httpservletrequest, HttpServletResponse