1 package com.haifei.servlet;
 2 
 3 import javax.servlet.ServletException;
 4 import javax.servlet.annotation.WebServlet;
 5 import javax.servlet.http.HttpServlet;
 6 import javax.servlet.http.HttpServletRequest;
 7 import javax.servlet.http.HttpServletResponse;
 8 import java.io.IOException;
 9 import
 
 java.io.PrintWriter;
10 
11 /**
12  * Response物件案例-伺服器輸出字元資料到瀏覽器
13  */
14 @WebServlet("/responseDemo4")
15 public class ResponseDemo4 extends HttpServlet {
16     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
17         /*//1 獲取字元輸出流
 
18         PrintWriter pw = response.getWriter();
19         //response在一次響應完成後會被自動銷燬，同時它獲取的流getWriter()也會被自動關閉
20         //之前學流的時候：.write()後需要flush()才能寫入；close()自帶flush效果
21         //所以此處不需要在pw.write()手動對pw進行flush()
22 
23         //2 輸出資料
24         pw.write("<h1>hello response</h1>");  //即為頁面上的響應體
 
*/
25 
26 
27 
28        /* //獲取流物件之前，流的預設編碼為ISO-8859-1，手動設定為utf-8
29          response.setCharacterEncoding("utf-8");
30         //告訴瀏覽器，伺服器傳送的訊息體資料的編碼。建議瀏覽器使用該編碼解碼
31         response.setHeader("content-type","text/html;charset=utf-8"); //content-type是一種常見的響應頭*/
32         //簡單的形式：設定編碼並告訴瀏覽器，防止中文亂碼
33         response.setContentType("text/html;charset=utf-8");
34 
35         PrintWriter pw = response.getWriter();
36         pw.write("<h1>你好啊 response</h1>");
37     }
38 
39     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
40         this.doPost(request, response);
41     }
42 }

 1 package com.haifei.servlet;
 2 
 3 import javax.servlet.ServletException;
 4 import javax.servlet.ServletOutputStream;
 5 import javax.servlet.annotation.WebServlet;
 6 import javax.servlet.http.HttpServlet;
 7 import javax.servlet.http.HttpServletRequest;
 8 import javax.servlet.http.HttpServletResponse;
 9 import java.io.IOException;
10 
11 /**
12  * Response物件案例-伺服器輸出位元組資料到瀏覽器
13  */
14 @WebServlet("/responseDemo5")
15 public class ResponseDemo5 extends HttpServlet {
16     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
17         response.setContentType("text/html;charset=utf-8"); //設定編碼
18         //1 獲取位元組輸出流
19         ServletOutputStream sos = response.getOutputStream();
20         //2 輸出資料
21         sos.write("你好啊hello".getBytes("utf-8"));
22     }
23 
24     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
25         this.doPost(request, response);
26     }
27 }