string格式转化出错，求高手指导

代码如下：
public class TEST implements Extractable {

   private String getSqlStr() {

          StringBuffer buf = new StringBuffer();
          buf.append("  SELECT nvl(ROUND(J.AMOUNT),’0’) AS SHIHARAIKIN1, ");

          buf.append("    FROM T_WL_TAX_PRINCIPAL  J ");

          return buf.toString();
   }

   private List<Map> execQuery() {

          PreparedStatement ps = null;
          ResultSet rs = null;
          DBean db = new DBean();
          List<Map> resultList = new LinkedList<Map>();
          Connection con = null;
          try {
                 db.connect();
                 con = db.getConnection();
                 ps = con.prepareStatement(getSqlStr());
                 rs = ps.executeQuery();
                 int i = 0;
                 while (rs.next()) {
                        Map<String, String> mapData = new HashMap<String, String>();
                 int ShiHaRaiKin = Integer.valueOf(rs.get("SHIHARAIKIN1"));
          }
                 }
          } catch (Exception e) {

                 resultList.add(mapData);
          } finally {
                 DBean.closeAll(null, ps, db);
          }
          return resultList;
   }

}

在 int ShiHaRaiKin = Integer.valueOf(rs.get("SHIHARAIKIN1")); 语句的时候报出下面错误：
For input string at java.lang.NumberFormatException.forInputString(Unknown Source)

我试过在rs.get("SHIHARAIKIN1")后面加个trim方法，还是会出这个错误，求高手指导~~~~~~~~

你的select语句中“SHIHARAIKIN1,”为什么要有个","号啊？