以Hello World為例, 其基本步驟是：


1．??選擇File->New->Project

2．??在對話框中選擇Tomcat Project，然后next

3．??輸入Project Name，這里可以寫HelloWorld，繼續next

4．??勾上can update server.xml file選項，finish,好了，一個Poject已經創建好了。

5．??打開new class 向導，在Name中填入HelloWorld,在Superclass中填入javax.servlet.http.HttpServlet，按下finish，好了，一個servlet就創建好了

6．??在HelloWorld.java中重載doGet方法，代碼如下：
?import javax.servlet.http.HttpServlet;
?import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;

public class HelloWorld extends HttpServlet {
?????? public void doGet(HttpServletRequest request,HttpServletResponse response)
??????throws IOException, ServletException {
?????? response.setContentType("text/html");
?????? PrintWriter writer = response.getWriter();
?????? writer.println("Hello World!");
??????}
}

7.在WEB-INF目錄下新建web.xml文件如下：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN" "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">

<web-app>
<servlet>
<servlet-name>TestServlet</servlet-name>
<servlet-class>HelloWorld</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>TestServlet</servlet-name>
<url-pattern>servlet/HelloWorld</url-pattern>
</servlet-mapping>
</web-app>

8.Ctrl+S保存，右鍵HelloWorld project,選擇Tomcat Project->update context to server.xml
? 注意：這里很重要，此步驟eclipse會自動修改了server.xml文件，添加HelloWorld項目。

9.在Eclipse中啟動Tomcat

10.在用瀏覽器訪問http://localhost:8080/HelloWorld/servlet/HelloWorld