java简单连接数据库

package org.jdbc;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class TestJDBC {
	public static void main(String[] args) {
		ResultSet rs = null;
		Statement stmt = null;
		Connection conn = null;
		try {
			
			Class.forName("com.mysql.jdbc.Driver");
			
			conn = DriverManager.getConnection(
					"jdbc:mysql://localhost:3306/xsxx", "root", "root");
			
			stmt = conn.createStatement();
			rs = stmt.executeQuery("select * from xs");
			while (rs.next()) {
				System.out.print(rs.getInt("id"));
				System.out.print(rs.getString("name"));
				System.out.println(rs.getString("major"));
			}
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			try {
				if (rs != null) {
					rs.close(); // 关闭ResultSet对象
					rs = null;
				}
				if (stmt != null) {
					stmt.close(); // 关闭Statement对象
					stmt = null;
				}
				if (conn != null) {
					conn.close(); // 关闭Connection对象
					conn = null;
				}
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
	}
}