急：被tomcat烦死，编译时使用不同的encoding，中文问题的表现

public class servlet_1 extends HttpServlet { 
public void doGet(HttpServletRequest request, 
HttpServletResponse response) 
throws ServletException, IOException { 
response.setContentType("text/html;charset=gb2312"); 
PrintWriter out = response.getWriter(); 
String title = "读取请求参数"; 
//byte[] tmpbyte=title.getBytes();
//title=new String(tmpbyte,"gb2312");
//out.println("<%@ page contentType='text/html;charset=gb2312'%>");
//out.println("<charset=gb2312>");out.println( "<BODY>\n" 
                + "<H1 ALIGN=CENTER>" + title+"你好!" +"</H1>\n" 
+ "<UL>\n" 
   + " <LI>start_time: " + request.getParameter("start_time") + "\n" 
   + " <LI>end_time: "   + request.getParameter("end_time") + "\n" 
   + " <LI>book_barcode: "+ request.getParameter("book_barcode") + "\n" + 
  "</UL>\n" 
 + "</BODY></HTML>"); 
}