总行数结果集 getRow 方法 [英] Total Number of Row Resultset getRow Method

问题描述

阅读以下代码:

public class selectTable {

public static ResultSet rSet;
public static int total=0;
public static ResultSet onLoad_Opetations(Connection Conn, int rownum,String sql)
{
int rowNum=rownum;
int totalrec=0;
try
{
   Conn=ConnectionODBC.getConnection();
   Statement stmt = Conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);        
    String sqlStmt = sql;        
    rSet = stmt.executeQuery(sqlStmt);
    total = rSet.getRow();        
    }
    catch(Exception e)
    {
        System.out.println(e.getMessage());
    }
    System.out.println("Total Number of Records="+totalrec);
    return rSet;
    }

}

以下代码未显示实际总数:

The folowing code dos't show actual total:

total = rSet.getRow();

我的 jTable 在 jTable 中显示 4 条记录，但总数 = 0；当我通过调试进行评估时，它显示:

my jTable display 4 record in jTable but total = 0; when I evaluate through debug, it shows:

total=(int)0; 

而不是total=(int)4如果我使用

rather than total=(int)4 And if I use

rSet=last(); above from the code  total = rSet.getRow();

然后总计显示准确值 = 4 但 rSet 什么也不返回.那么 jTable 是空的.更新我！

then total shows accurate value = 4 but rSet return nothing. then jTable is empty. Update me!

推荐答案

BalusC 的答案是正确的！但是我不得不根据用户实例变量提一下比如:

BalusC's answer is right! but I have to mention according to the user instance variable such as:

rSet.last(); 
total = rSet.getRow();

然后你错过了什么

rSet.beforeFirst();

剩下的代码一样你会得到你想要的结果.

the remaining code is same you will get your desire result.

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