Oracle Varchar2（byte）与Java字节

Question

I have a table having column defined varchar2(255 byte), When I have insert record via Spring JDBC class I have an error

; nested exception is java.sql.BatchUpdateException: ORA-12899: de­er "DBB"."USERS"."NICK" s³tunu iin ok b³y³k (as²l: 441, maksimum: 255)

I have been cropping the String via following method but it does not work

   public static String filterStringForTxnLog(String string) {      
      try {
         String noPipe = string.replace('|', '.');
         byte noPipeBytes[]= noPipe.getBytes("UTF-8");
         if (noPipeBytes.length > 255) {
            byte [] cropBytes = new byte[255];
            for(int i=0;i<255;i++){
               cropBytes[i]=noPipeBytes[i];
            }
            return new String(cropBytes);
         }
         return noPipe;
      } catch (Exception e) {
         logger.error("Nick filter error string:" + string, e);
         return "";
      }
   }

When I have pass the following String size of new String does not fit DB column.

||123123123123123123123123kşlkşlkşlk12şl3l1k3şl21kşl3üğüğoşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşşş123123123123123123123123123123123123123123112321323123123123

Answer 1

This is an encoding issue. You have some special UTF-8 characters which are encoded in multiple bytes which is making it more than 255 bytes. Hacking it down to 255 bytes is dangerous and could lead to corruption. You need to account for the encoding.

Answer 2

您需要将列的定义更改为VARCHAR2（255 CHAR ）。

Answer 3

我将字符串创建更改为以下内容，然后可以正常工作。

return new String(cropBytes,"UTF-8");