1、Servlet简介
1 package bilibili.servlet.study; 2 3 import java.io.IOException; 4 import java.io.PrintWriter; 5 6 import javax.servlet.ServletException; 7 import javax.servlet.http.HttpServlet; 8 import javax.servlet.http.HttpServletRequest; 9 import javax.servlet.http.HttpServletResponse; 10 11 /** 12 * Servlet implementation class ServletDemo1 13 */ 14 public class ServletDemo1 extends HttpServlet { 15 private static final long serialVersionUID = 1L; 16 /** 17 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse 18 * response) 19 */ 20 protected void doGet(HttpServletRequest request, HttpServletResponse response) 21 throws ServletException, IOException { 22 // TODO Auto-generated method stub 23 response.setContentType("text/html"); 24 response.setCharacterEncoding("UTF-8"); 25 PrintWriter out = response.getWriter(); 26 // println中的""需要用/转义下 27 out.println( 28 "<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01 Strict//EN\" \"http://www.w3.org/TR/html4/strict.dtd\">"); 29 out.println("<html>"); 30 out.println("<head>"); 31 out.println("<title>ServletDemo1</title>"); 32 out.println("</head>"); 33 out.println("<body>"); 34 out.println("<h1>"); 35 out.println(this.getClass()); 36 out.println("</h1>"); 37 out.println("<body>"); 38 out.println("</html>"); 39 out.close(); 40 out.flush(); 41 } 42 /** 43 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse 44 * response) 45 */ 46 protected void doPost(HttpServletRequest request, HttpServletResponse response) 47 throws ServletException, IOException { 48 // TODO Auto-generated method stub 49 doGet(request, response); 50 } 51 }
doGet()和doPost()方法的区别:
doGet():1.常用来查询信息 2.提交的查询信息显示在浏览器的地址栏中 3.以get方式提交的网址有长度限制
doPost():1提交大量信息 2.以post方式提交数据是，数据信息不会显示在浏览器的地址栏中
