response的outputStream输出数据的问题

 package cn.itcast.response;

 import java.io.IOException;
 import java.io.OutputStream;
 import java.io.PrintWriter;
 import java.io.UnsupportedEncodingException;

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

 //在servlet中用outputStream输出数据的问题，以及输出中文的问题
 public class ResponseDemo extends HttpServlet {

     public void doGet(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {

         test4(response);

     }

     private void test4(HttpServletResponse response) throws IOException,
             UnsupportedEncodingException {

         OutputStream out = response.getOutputStream();
         out.write((1 + "").getBytes());
     }

     private void test3(HttpServletResponse response) throws IOException,
             UnsupportedEncodingException {

         // 注意，下面写错了浏览器提示下载
         response.setHeader("content-type", "text/html,charset=UTF-8");

         String data = "中国";

         OutputStream out = response.getOutputStream();
         out.write(data.getBytes("UTF-8"));
     }

     private void test2(HttpServletResponse response) throws IOException,
             UnsupportedEncodingException {

         // 用html技术中的meta标签模拟一个http响应头，来控制浏览器的行为
         String data = "中国";

         OutputStream out = response.getOutputStream();

         out
                 .write("<meta http-equiv='content-type' content='text/html;charset='UTF-8'></meta>"
                         .getBytes());
         out.write(data.getBytes("UTF-8"));
     }

     private void test1(HttpServletResponse response) throws IOException,
             UnsupportedEncodingException {
         response.setHeader("content-type", "text/html,charset=UTF-8");

         String data = "中国";

         OutputStream out = response.getOutputStream();
         out.write(data.getBytes("UTF-8"));
     }

     public void doPost(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {

     }

 }