Servlet中response.getOutputStream() 默认编码是gb2312

package info.dyndns.oszc;import java.io.IOException;import java.io.OutputStream;import java.io.PrintWriter;import java.util.Date;import javax.servlet.ServletException;import javax.servlet.http.Cookie;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class CookieDemo1 extends HttpServlet {public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {Cookie[] cookies = request.getCookies();boolean visited = false;response.setContentType("text/html;charset=UTF-8"); //设置头文件编码是UTF-8，浏览器用utf-8解码OutputStream out = response.getOutputStream();  //response.getOutputStream()默认编码是gb2312for (int i=0; cookies !=null && i<cookies.length ; i++){if (cookies[i].getName().equals("lastVisit")){visited = true;out.write("您上次访问的时间为：".getBytes()); //用gb2312写入，显然会出现乱码，所以要修改为out.write("您上次访问的时间为：".getBytes("UTF-8")); String lastVisit =cookies[i].getValue();Date date =new Date( Long.parseLong(lastVisit) );out.write(date.toLocaleString().getBytes());}}if (!visited){out.write("第一次访问本网站!".getBytes());//也会出现乱码，修改方法如上}Cookie cookie = new Cookie("lastVisit", System.currentTimeMillis()+"");cookie.setMaxAge(1*60*60); //持续一个小时cookie.setPath("/day07");response.addCookie(cookie);}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {}}