一些非常有用的JAVA常用方法(1)

  作者:xiaoyou
出处: www.csdn.com
<%!
stc_RSYB_Name stcRSYName1[];
stc_SYB_INF stcSYBINF1[];
%>
<%/*
   String p = (String) session.getValue("access");
   if (p==null || !p.equals("1")) {
     response.sendRedirect("error.htm");
     return;
   }*/
%>
<%!
file://得到机器名字或IP
String get_Myhostname(javax.servlet.http.HttpServletRequest request){
  String myhostname = null;
    try{
      myhostname = request.getRemoteHost();
      myhostname = myhostname.toUpperCase();
    }catch(Exception e){}
  return myhostname;
}
file://处理空字符串
  String dealNull(String str) {
    String returnstr = null;
    if (str == null) returnstr = "";
    else returnstr = str;
    return returnstr;
  }
file://处理空对象
  Object dealNull(Object obj){
    Object returnstr = null;
    if (obj == null) returnstr = (Object)("");
    else returnstr = obj;
    return returnstr;
  }
  int dealEmpty(String s) {
    s = dealNull(s);
    if (s.equals("")) return 0;
    return Integer.parseInt(s);
  }
String replace(String str,String substr,String restr){
  String[] tmp = split(str,substr);
  String returnstr = null;
  if(tmp.length!=0) {
    returnstr = tmp[0];