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这次课讲了一些servlet一些基础的知识!
1.在本地访问servlet(以tomcat服务器为例):
http://locatlhost:8080/servlet/你的servlet的名字
这样你就可以直接访问这个servlet了!
2.使用jcreator进行servlet的程序编写时,需要导入tomcat下,common/lib/servlet.jar
才能调用servlet包
3.测试程序,还是从最简单的hello,world!来进行练习吧!
代码:
import javax.servlet.*;
import java.io.*;
public class helloservlet extends genericservlet
{
//需要重载初象类service
public void service(servletrequest request,servletresponse response) throws ioexcetpion
{
printwriter out = response.getwriter();
out.println("hello,this is our world!");
}
}
4.httpservlet继承了genericservlet,httpservletrequest/httpservletresponse继承servletrequest/servletresponse
方法getheader是得到表头信息
request.getheader(“connection“) 得到连接信息
request.getheader(“user-agent“) 得到用户信息
例子:
import javax.servlet.*;
import java.io.*;
import javax.servlet.http.*; //必须导入这个包,才能使用httpservlet
public class helloservlet extends httpservlet
{
//需要重载初象类service
public void service(httpservletrequest request,httpservletresponse response) throws ioexcetpion
{
printwriter out = response.getwriter();
string s = request.getheader("connection");
string user = request.getheader("user-agent");
out.println("you connect to server is"+s);
out.close();
}
}
5.response.setcontenttype("text/html;charset=gb2312")
