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 {

    }

}