test.java

来自「各种数据保存：字符型」· Java 代码 · 共 51 行

package cn.itcast.jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class Test {

	/**
	 * @param args
	 * @throws Exception
	 * @throws ClassNotFoundException
	 * @throws SQLException
	 */
	public static void main(String[] args) throws Exception {
		Connection conn = JdbcUtils.getConnection();
		System.out.println("class1:" + conn.getClass());
		test();
	}

	static void test() throws Exception {
		Class.forName("com.mysql.jdbc.Driver");
		DriverManager.registerDriver(new com.mysql.jdbc.Driver());
		System.setProperty("jdbc.drivers", "com.mysql.jdbc.Driver");
		String url = "jdbc:mysql://localhost:3306/test?user=root&password=root";
		String user = "root";
		String password = "root";

		Connection conn = DriverManager.getConnection(url, user, password);
		System.out.println("class2:" + conn.getClass());

		Statement st = conn.createStatement();

		String sql = "select id, age, name from user";
		ResultSet rs = st.executeQuery(sql);
		while (rs.next()) {
			System.out.println(rs.getInt("id"));
			System.out.println(rs.getString("name"));
			System.out.println(rs.getInt("age"));
			// ...
		}

		rs.close();
		st.close();
		conn.close();
	}

}