引入jar包：
servlet-api.jar
ParameterServlet.java
package com.mousewheel.springmvc; import java.io.IOException; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class ParameterServlet extends HttpServlet { private String name = ""; private Integer age = 0; @Override public void init() throws ServletException { super.init(); ServletContext context = getServletContext(); name = context.getInitParameter("name"); age = Integer.valueOf(context.getInitParameter("age")); } @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { ServletOutputStream out = resp.getOutputStream(); resp.setContentType("text/html"); out.println("<html><head><title>Basic Servlet</title></head>"); out.println("<body>Name is <b>" + name); out.println("</b><br>Age is <b>" + age + "</b>"); out.println("</body></html>"); } }
web.xml
<web-app id="WebApp_ID" 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"> <display-name>Servlet Demo</display-name> <context-param> <param-name>name</param-name> <param-value>mousewheel</param-value> </context-param> <context-param> <param-name>age</param-name> <param-value>10</param-value> </context-param> <servlet> <servlet-name>ParameterServlet</servlet-name> <servlet-class>com.mousewheel.springmvc.ParameterServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>ParameterServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
运行结果
