1、依赖jar
servlet-api.jar
2、工程结构
3、java servlet实现类
package testServlet; import java.io.IOException; import java.io.PrintStream; import java.io.PrintWriter; import javax.servlet.ServletConfig; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class ThreeParams extends HttpServlet { public void init(ServletConfig config) throws ServletException { System.out.println("init"); super.init(config); } @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { PrintWriter pw = resp.getWriter(); System.out.println("Param1: " + req.getParameter("param1")); System.out.println("Param2: " + req.getParameter("param2")); System.out.println("Param3: " + req.getParameter("param3")); pw.println(req.getParameter("param1")); pw.println("<br>"); pw.println(req.getParameter("param2")); pw.println("<br>"); pw.println(req.getParameter("param3")); pw.println("<br>"); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { System.out.println("post"); super.doPost(req, resp); } }
4、在配置文件中配置servlet
<?xml version="1.0" encoding="ISO-8859-1" ?> <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <servlet> <servlet-name>ThreeParams</servlet-name> <servlet-class>testServlet.ThreeParams</servlet-class> </servlet> <servlet-mapping> <servlet-name>ThreeParams</servlet-name> <url-pattern>/testServlet/ThreeParams</url-pattern> </servlet-mapping> </web-app>
5、在jsp中调用servlet
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <base href="<%=basePath%>"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <form id="form1" name="form1" method="get" action="testServlet/ThreeParams" > <table width="343" border="1"> <tr> <td width="92">param1</td> <td width="94"><input name="param1" type="text" id="param1" /></td> </tr> <tr> <td>param2</td> <td><label><input name="param2" type="text" id="param2" /></label></td> </tr> <tr> <td>param3</td> <td><label><input name="param3" type="text" id="param3" /></label></td> </tr> <tr> <td> </td> <td><input type="submit" value="提交" /></td> </tr> </table> </form> </body> </html>