实例1:简单的Servlet
下面是一个简单的Servlet例子,用于响应HTTP GET请求并输出“Hello, World!”。
```java
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class HelloWorldServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("