java连数据库是的对等代码怎么写啊？例如：密码怎样与数据库中的密码验证正确还是错误。

输入的密码与数据库中的密码一个个比较啊.不就行了么.
常见连数据库的代码;

FirstJDBC
import java.sql.*;
public class FirstJDBC
{
public static void main(String args[])
{
try{

//1. 加载驱动
//Class.forName("org.gjt.mm.mysql.Driver");
Class.forName("oracle.jdbc.driver.OracleDriver");
//2. 建立连接
//Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/mysql","root","1234");
Connection con = DriverManager.getConnection("jdbc:oracle:thin:@192.168.0.206:7777:tarena","wsd0701","wsd0701");
//3. 创建Statement
Statement stmt = con.createStatement();
//4. 执行SQL
String sql = "select id,name from t_user";
ResultSet rs = stmt.executeQuery(sql);
//5. 处理结果集
while( rs.next() )
{
System.out.println("id: " + rs.ge