In a well designed MVC approach, the JSP file should not contain any line of Java code and the servlet class should not contain any line of JDBC code. Assuming that you want to show a list of products in a webshop, the following code needs to be created. A Product class representing a real … Read more
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
Here’s a step by step explanation how to install MySQL and JDBC and how to use it: Download and install the MySQL server. Just do it the usual way. Remember the port number whenever you’ve changed it. It’s by default 3306. Download the JDBC driver and put in classpath, extract the ZIP file and put … Read more
I’m thinking something like this: Create a prepared statement and do a query with it., getting back a result set. Close the prepared statement. Attempt to close the result set after closing the prepared statement.
As we can see here you have closed connection to DB in that time when you try to setString do. The way It is possible When you don’t create any connection to DB When you create but don’t open any connection to DB When you create and, even open, but, close connection before tries to … Read more
http://dev.mysql.com/doc/refman/5.1/en/datetime.html – change the data type in MySQl to DATETIME.
You’re using standard quotes instead of backticks for escaping the MySql reserved word KEYS. Change the table name to any non-reserved word so that the quotes can be removed.