hello.servlet.basic.HelloServlet
package hello.servlet.basic;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet(name = "helloServlet", urlPatterns = "/hello")
public class HelloServlet extends HttpServlet {
@Override
protected void service(HttpServletRequest request, HttpServletResponse
response)
throws ServletException, IOException {
System.out.println("HelloServlet.service");
System.out.println("request = " + request);
System.out.println("response = " + response);
String username = request.getParameter("username");
System.out.println("username = " + username);
response.setContentType("text/plain");
response.setCharacterEncoding("utf-8");
response.getWriter().write("hello " + username);
}
}@webServlet name = 서블릿 이름, urlPattern = URL 매핑
콘솔 결과
HelloServlet.service
request = org.apache.catalina.connector.RequestFacade@5e4e72
response = org.apache.catalina.connector.ResponseFacade@37d112b6
username = world
톰캣 서버에서 서블릿 컨테이너에 모든 서블릿을 생성하고, 웹 브라우저에서 HTTP Request를 요청하면 AWS를 통해 서블릿 컨테이너의 helloServlet을 찾아서 요청을 처리하고, 응답을 다시 AWS를 통해 웹 브라우저로 보내준다.
