mysql数据库__Jdbc直接操作__PreparedStatement__select

Posted 2020-10-09 18513757531

一、代码如下

private void select_mysql() {
		// TODO Auto-generated method stub
		java.sql.PreparedStatement ps = null;
		java.sql.Connection cn = null;
		ResultSet rs = null;

		try {
			// Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
			Class.forName("com.mysql.jdbc.Driver").newInstance();
			cn = DriverManager.getConnection(
					"jdbc:mysql://localhost:3306/learn?user=root&password=&useUnicode=true&characterEncoding=UTF8");
			ps = cn.prepareStatement("select * from user");

			rs = ps.executeQuery();

			// rs.next();
			// System.out.println(rs.getInt(1));
			while (rs.next()) {
				String name = rs.getString(2);
				String passwd = rs.getString(3);
				String phone = rs.getString(4);
				String email = rs.getString(5);
				System.out.println(name + " " + passwd + " " + phone + " " + email);
				// System.out.println(name);
			}

		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			try {
				rs.close();
				cn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
	}