servlet入门手工写个servlet

1、在webapps目录下新建一个day05的web应用，在day05下新建一个WEB-INF\classes，在classes新建servlet

package cn.itcast;
import java.io.*;
import javax.servlet.*;


public class FirstServlet extends GenericServlet{

public void service(ServletRequest req,ServletResponse res)
throws ServletException,java.io.IOException
{
String data = "hello servlet!!";
OutputStream out = res.getOutputStream();
out.write(data.getBytes());
}
}

2、进入到classes目录，编译FirstServlet
javac -d . FirstServlet.java
set classpath=%classpath%;.............

3、在day05\web-inf目录，新建一个web.xml文件，对servlet进行配置
xmlns:xsi="https://www.wendangku.net/doc/1b929245.html,/2001/XMLSchema-instance"
xsi:schemaLocation="https://www.wendangku.net/doc/1b929245.html,/xml/ns/javaee https://www.wendangku.net/doc/1b929245.html,/xml/ns/javaee/web-app_2_5.xsd"
version="2.5">


FirstServlet
cn.itcast.FirstServlet



FirstServlet
/xxx




4、启动服务器，在ie输入http://localhost:8080/day05/xxx