1.用url调用servlet
建 web project “HelloServlet”，在src下建包com.amaker.servlet，在包下建HelloServlet.java。
package com.amaker.servlet; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; //敲doGet alt+/,就会出现原来的方法 public class HelloServlet extends HttpServlet { /** * */ private static final long serialVersionUID = 2733147315082601065L; protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub String url=request.getRequestURI().toString(); System.out.println(url); PrintWriter out =response.getWriter(); out.println("hello"); } }
修改web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <servlet> <servlet-name>helloa</servlet-name> <servlet-class>com.amaker.servlet.HelloServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>helloa</servlet-name> <url-pattern>/servlet/hello</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <login-config> <auth-method>BASIC</auth-method> </login-config> </web-app>
2.用表单调用：
在WebRoot文件夹中，添加一个HTML文件，Tset.html
<!DOCTYPE html>
<html>
<head>
<title>Tset.html</title>
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
</head>
<body>
<form action="/HelloServlet/servlet/hello">
<input type="submit" value="Test">
</form>
</body>
</html>
3.用超级链接调用Servler
<hr>
<a href="/HelloServlet/servlet/hello">link...</a>
4.用javascript调用servlet
<!DOCTYPE html>
<html>
<head>
<title>Tset.html</title>
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
<script type="text/javascript">
function test()
{
var f=document.forms[0];
f.action="/HelloServlet/servlet/hello";
f.submit();
}
</script>
</head>
<body>
<form action="/HelloServlet/servlet/hello">
<input type="submit" value="Test">
<input type="button" value="click me" onclick="test()">
</form>
<hr>
<a href="/HelloServlet/servlet/hello">link...</a>
</body>
</html>]