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public class chStr {
        /***************************************************
                *method name: chStr()
                *method function:½â¾öÊä³öÖÐÎÄÂÒÂëÎÊÌâ
                *return value:  String
                *2006-01-08
        ****************************************************/
        public String chStr(String str){
                if(str==null){
                        str="";
                }else{
                        try{
                                str=(new String(str.getBytes("iso-8859-1"),"GB2312")).trim();
                        }catch(Exception e){
                                e.printStackTrace(System.err);
                        }
                }
                return str;
            }
        /***************************************************
          *method name:convertStr()
          *method function:ÏÔʾÎı¾ÖеĻسµ»»ÐС¢¿Õ¸ñ¼°±£Ö¤HTML±ê¼ÇµÄÕý³£Êä³ö
          *return value:  String
          * author:liangyu333
        ****************************************************/
       public String convertStr(String str1){
           if(str1==null){
               str1="";
           }else{
               try{
                 //replaceAll(String str1,String str2)·½·¨ÎªJDK1.4.xµÄз½·¨£¬Ê¹ÓÃstr2Ìæ»»×Ö·û´®ÖеÄËùÓÐstr2×Ö·û´®
                 str1=str1.replaceAll("<","&lt;");//Ìæ»»×Ö·û´®ÖеÄ"<"ºÍ">"×Ö·û£¬±£Ö¤HTML±ê¼ÇµÄÕý³£Êä³ö
                 str1=str1.replaceAll(">","&gt;");
                 str1=str1.replaceAll(" ","&nbsp;");
                 str1=str1.replaceAll("\r\n","<br>");
               }catch(Exception e){
                       e.printStackTrace(System.err);
               }
           }
           return str1;
       }
}