Java连接数据库

JDBC代码

import java.sql.*;

public class JdbcUtils {

	public static Connection getConnection() {
		Connection con = null;
		try {
			Class.forName("驱动名");
			con = DriverManager.getConnection("url", "用户名", "用户密码");
			System.out.println("数据库驱动加载成功，数据库连接成功");
		} catch (Exception e) {
			e.printStackTrace();
		}
		return con;
	}
}

以连接PostgresSQL为例

import java.sql.*;

public class Conn {

	public static Connection getConnection() {
		Connection con = null;
		try {
			Class.forName("org.postgresql.Driver");
			con = DriverManager.getConnection("jdbc:postgresql://localhost:5432/postgres", "postgres", "postgres");
			System.out.println("数据库驱动加载成功，数据库连接成功");
		} catch (Exception e) {
			e.printStackTrace();
		}
		return con;
	}
}