如何使用会话属性获取数据？帮我解决这个问题

Question

String sql = "SELECT * FROM stakehoders WHERE email = ${sessionEmail}"

此处sessionEmail是会话属性。 在Java页面中，我如下分配sessionEmail

HttpSession session = request.getSession();
session.setAttribute("sessionEmail",email);

Answer 1

看看Using Prepared Statements教程。有趣的部分将是：

String sql = "SELECT * FROM stakehoders WHERE email = ?";
PreparedStatement stmt = connection.prepareStatement(sql);
stmt.setString(1, request.getSession().getAttribute("sessionEmail");

Answer 2

HttpSession session = request.getSession();
String sessionEmail = session.getAttribute("sessionEmail");

PreparedStatement stmt = con.prepareStatement("SELECT * FROM stakehoders WHERE email = ?");
stmt.setString(1, sessionEmail);