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 {

    }

}