JSP common knowledge Point __JS

1, JSP Expression & JSP program section need to pay attention to a few details: (1) JSP expression can not use ";" End (2) No more than one statement in the JSP
(3) The content in the JSP expression must be a string type, or it must be converted to a string through the ToString method

(1) <%=msg%> expression equivalent to <%out.print (msg);> program segment
(2) You cannot define a function in a JSP program segment

2, JSP Transfer value: (1) URL pass value
(2) Table conveys value

3, with JavaScript to submit <input type = "button" value= "login" OnClick = "function ()" >


4, JSP access to the database
Statement stat = conn.createstatement ();
Stat.executequery (SQL statement); Inquire
Stat.executeupdate (SQL statement); Add, delete, or modify
....
To close a database connection
Stat.close ();
Conn.close ();