浏览器解析数据的乱码问题

//用response的outputStream输出中文
public class ResponseDemo1 extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		test4(response);
	}
	
	//方法二，用meta标签模似一个http响应头，控制浏览器以u8打开
	private void test2(HttpServletResponse response)
		throws UnsupportedEncodingException, IOException {
		
		String data = "中国";
		byte b[] = data.getBytes("UTF-8");
		
		response.getOutputStream().write("<meta http-equiv='content-type' content='text/html;charset=UTF-8'>".getBytes());
		response.getOutputStream().write(b);
	}
	//方法一
	private void test1(HttpServletResponse response)
			throws UnsupportedEncodingException, IOException {
		//设置一个头信息，通知浏览器以U8打开
		response.setHeader("content-type", "text/html;charset=UTF-8");
		
		String data = "中国";
		byte b[] = data.getBytes("UTF-8");
		response.getOutputStream().write(b);
	}

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

}

二，用response的write写数据：

//response的write流输出中文的问题
public class ResponseDemo2 extends HttpServlet {

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

		//用write流写字符，它会默认查询ISO8859-1的码表
		//这句话是让它去查u8的码表
		response.setCharacterEncoding("UTF-8");
		
		//在通知浏览器以u8打开
		response.setHeader("content-type", "text/html;charset=UTF-8");
		
		//写了这句话就相当于上面两句话
//		response.setContentType("text/html;charset=UTF-8");
		
		String data = "中国";
		response.getWriter().write(data);
		
	}

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

}