Java调用Oracle存储Package

//java调用oracle的package代码
public boolean cal() throws java.lang.Exception {
          CallableStatement cstmt = null;
          String procedure = "{call G_IMPORT_CAL.g_entry(?,?,?) }";
          cstmt = conn.prepareCall(procedure);
          cstmt.setString(1,organkey);                   
          cstmt.setString(2,this.getT18_task_fac().getGranularity());        
          cstmt.setString(3,this.getT18_task_fac().getStatisticdate());
          cstmt.executeUpdate();
          cstmt.close();
        return true;
    }