Servlet 示例 | servlet

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

Servlet 示例-LMLPHP