2-5Servlet自由编程练习

使用Servlet在页面输出商品类别名称，商品类别名称通过url地址进行传递，在Servlet中获取类别名称并输出。

url地址如下所示：

 

 

package com.imooc.sevlet;

import java.io.IOException;
import java.io.PrintWritter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletReponse;

public class ShopServlet extends HttpServlet{

@override
protected void service(HttpServletRequest req,HttpServletResponse resp)throws ServletException,IOException{
String category = req.getParameter("category");
String html = "<p style='color:blue'>" + category + "</p>";
System.out.println("返回给浏览器的相应数据为："+ html);
PrintWriter out = resp.getWriter();
out.println(html);
}
}

<?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_3_1.xsd" id="WebApp_ID" version="3.1">

  <display-name>ServletProj</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>

  <servlet-name>book</servlet-name>

  <servlet-class>com.imooc.servlet.ShopServlet</servlet-class>

  </servlet>

  <servlet-mapping>

  <servlet-name>book</servlet-name>

  <url-pattern>/ShopServlet</url-pattern>

  </servlet-mapping>

</web-app>