JDBC—mysql批量導入

• mysql批量導入功能測試
  批量導入的優勢可以一次性提交事務，mysql底層有優化速度較快。

private static final int MAX = 10000;

	// 1. 根據 MYSQL 提供的驅動，獲取與 MYSQL 數據庫的連接
	@Test
	public void test1() throws Exception {
		// 1. 獲取驅動
		Driver driver = null;

		String driverClassName = "com.mysql.jdbc.Driver";

		Class clazz = Class.forName(driverClassName);

		driver = (Driver) clazz.newInstance();

		// 2. 獲取連接必須rewriteBatchedStatements=true MySQL默認是關閉的
		String url = "jdbc:mysql://127.0.0.1:3306/sys?rewriteBatchedStatements=true";
		Properties info = new Properties();
		info.setProperty("user", "root");
		info.setProperty("password", "root");
		Connection conn = null;
		try {
			conn = driver.connect(url, info);
			String sql = "INSERT INTO `test` (`id`,`name`) value(?,?)";// 注意sql末尾不能有;否則報錯
			PreparedStatement PS = conn.prepareStatement(sql);
			// 關閉自動提交
			conn.setAutoCommit(false);
			long staTime = System.currentTimeMillis();
			for (int i = 0; i < MAX; i++) {
				PS.setInt(1, i + 1);
				PS.setString(2, String.valueOf(i));
				PS.addBatch();
			}
			// 一次性執行
			PS.executeBatch();
			// 一次性提交
			conn.commit();
			long endTime = System.currentTimeMillis();
			System.out.println((endTime - staTime));
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			conn.close();
		}