java中sql之count,Java / SQL - Count(*) 的用法

試下:

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

public class CountRecordsUsingPreparedStatement {

public static Connection getConnection() throws Exception {

String driver = "oracle.jdbc.driver.OracleDriver";

String url = "jdbc:oracle:thin:@localhost:1521:databaseName";

String username = "name";

String password = "password";

Class.forName(driver);

Connection conn = DriverManager.getConnection(url, username, password);

return conn;

}

public static void main(String[] args) {

ResultSet rs = null;

Connection conn = null;

PreparedStatement pstmt = null;

try {

conn