統計數據庫中表的記錄數

package com.dlj.utils;

import java.sql.ResultSet;

import com.mysql.jdbc.Connection;
import com.mysql.jdbc.Statement;

public class Count {
	public static void main(String[] args) {
		System.out.println(Count.count("t_user"));
	}

	public static int count(String t_user) {
		int i = 0;
		Connection con = (Connection) DBUtil.getConnection();
		try {
			Statement stmt = (Statement) con.createStatement();
			ResultSet rset = stmt.executeQuery("select count(*)as totalCount from " + t_user);
			if (rset.next()) {
				i = rset.getInt("totalCount");
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			DBUtil.close(con, stmt, rset);
		}
		return i;
	}

}

Servlet：

		Connection connection = null;
		Statement statement = null;
		ResultSet totalCountResultSet = null;
		try {
			connection = (Connection) DBUtil.getConnection();
			statement = (Statement) connection.createStatement();
			
			int totalCount = 0;
			totalCountResultSet = statement.executeQuery("select count(*) as totalCount from t_user ");
			if (totalCountResultSet.next()) {
				totalCount = totalCountResultSet.getInt("totalCount");
			}
			request.setAttribute("totalCount", totalCount);
			
			RequestDispatcher dispatcher = request.getRequestDispatcher("userList.jsp");
			dispatcher.forward(request, response);
			return;
		} catch (Exception e) {
			// TODO: handle exception
			e.printStackTrace();
		} finally {
			DBUtil.close(connection, statement, totalCountResultSet);
		}

jsp:

<!-- EL表達式 -->
總共${totalCount}條記錄