struts 1.x /mysql stored function ...input string..charset latin1

[john lee]

In my Struts Action class,  I invoke mysql¡¯ stored function, but get following 
error:
   
  javax.servlet.ServletException: For input string: ¡°20) CHARSET latin1
  READS SQL DATA 
  ¡­
  java.lang.NumberFormatException: For input string: ¡°20) CHARSET latin1
   
     
  Source code:
  ¡­
  Struts Action.class
  ¡­
  String result;
  Connection con;
  CallableStatement mf=con.prepareCall(¡°{?call sf_login_check(?)}¡±);
  mf.registerOutParameter(1,TypesVARCHAR);
  mf.setString(2,¡±test¡±);
  mf.execute();
  result=mf.getString(1);
  ¡­
   
  Mysql stored function
  Create function sf_login_check(v_login_id varchar(10))
   returns varchar(20) READS SQL DATA
  BEGIN;
     DECLARE t_exist INT;
     Select cout(*) into t_exist from accts
  Where id=v_loginid;
  If t_exist1 then
      Return(¡®Success¡¯);
  Else
      Return(¡®Fail¡¯);
  End if;
  END;
   
  Any clue? Tks in advance
   
  john

       
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