response的Writer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;

//通过Response的writer留输出数据的问题
public class ResponseDemo extends HttpServlet {

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

test1(response);
}

private void test2(HttpServletResponse response) throws IOException {
//设置response使用的码表，以控制response以什么码表向浏览器写出数据。
response.setCharacterEncoding("UTF-8");

//指定浏览器以什么码表打开服务器发送数据。
response.setContentType("text/html;charset=utf-8");

String data="中国";

PrintWriter pw = response.getWriter();
pw.write(data);
}

private void test1(HttpServletResponse response) throws IOException {
//设置response使用的码表，以控制response以什么码表向浏览器写出数据。
response.setCharacterEncoding("UTF-8");

//指定浏览器以什么码表打开服务器发送数据。
response.setHeader("Content-type", "text/html;charset=utf-8");

String data="中国";

PrintWriter pw = response.getWriter();
pw.write(data);
}

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

}

}