如何检查存在的用户并传入 mongoCollection 以在会话中设置？

Question

我可以在 if() 中写什么来检查集合中是否存在从登录表单中获取的参数？

String username = request.getParameter("user");
String password = request.getParameter("pass");
String[] remeberusr = request.getParameterValues("remember");

MongoClient client = new MongoClient("localhost", 27017);
DB db = client.getDB("mydb");
DBCollection collection = db.getCollection("members");
BasicDBObject setquery = new BasicDBObject();
setquery.put("user", username);
setquery.put("pass", password);

DBCursor result = collection.find(setquery);

if (?)) {
    HttpSession session = request.getSession();
    session.setAttribute("user", username);
    session.setAttribute("pass", password);
    session.setAttribute("remember", remeberuser);
    response.sendRedirect("session.jsp");
} else {
    out.print("user and pass incorrected!");
}

Answer 1

我过去曾将此方法用于 MySQL 数据库，希望它有助于获取存储在数据库中的用户名和密码，并使用 for 循环和 in if 使用 (==) 运算符

Answer 2

if(hasNext())

hasNext() 检查是否有另一个对象可用

如何检查存在的用户并传入 mongoCollection 以在会话中设置？

how to check exist user and pass in mongoCollection for set in session?

java

servlets

mongodb

mongo-java