java获取ResultSet记录行数

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// Get a record count with the SQL Statement
Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery("SELECT COUNT(*) AS rowcount FROM
emp");
rs.next();

// Get the rowcount column value.
int ResultCount = rs.getInt(rowcount) ;

rs.close() ;
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sqlString = "SELECT * FROM emp";

// Create a scrollable ResultSet.
stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_READ_ONLY);
rs = stmt.executeQuery(sqlString);

// Point to the last row in resultset.
rs.last();

// Get the row position which is also the number of rows in the ResultSet.
int rowcount = rs.getRow();

System.out.println("Total rows for the query:"+rowcount);

// Reposition at the beginning of the ResultSet to take up rs.next() call.
rs.beforeFirst();
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ResultSet rs = null;
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// Create and initialize Cached RowSet object.
OracleCachedRowSet ocrs = new OracleCachedRowSet();

// Create a string that has the SQL statement that gets all the records.
String sqlString = "SELECT empno FROM emp";

// Create a statement, resultset objects.
stmt = conn.createStatement();
rs = stmt.executeQuery(sqlString);

// Populate the Cached RowSet using the above Resultset.
ocrs.populate(rs);

// Point to the last row in Cached RowSet.
ocrs.last();  

// Get the row position which is also the number of rows in the Cached
// RowSet.
int rowcount = ocrs.getRow();

System.out.println("Total rows for the query using Cached RowSet: "+
rowcount);

// Close the Cached Rowset object.
if (ocrs != null)
ocrs.close();
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