Servlet技术:Servlet入门案例

在eclipse中配置好Tomcat

首先将Tomcat文件中lib中的Servlet-api.jar导入项目的WebContent－WEB-INF－lib

在Java Resources中创建一个Servlet类 Servlet1。

Servlet1

package cn.xtnotes.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Servlet1 extends HttpServlet {

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		String s="这是Servlet产生的数据";
		response.setCharacterEncoding("utf-8");
		PrintWriter pw=response.getWriter();
		pw.print(s);
	}
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		
		doGet(request, response);
	}
}

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" id="WebApp_ID" version="4.0">
  <display-name>U8</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <servlet>
  <!-- 类名 -->
  <servlet-name>Servlet1</servlet-name>
  <!-- 所在包 -->
  <servlet-class>cn.xtnotes.servlet.Servlet1</servlet-class>
  </servlet>
  <servlet-mapping>
  <servlet-name>Servlet1</servlet-name>
  <!-- 访问网址 -->
  <url-pattern>/Servlet1</url-pattern>
  </servlet-mapping>
</web-app>