A Java programming blog!
Play Framework has some very useful utilities and helpers for generating forms. In this simple tutorial I will be showing how to build a form in Play Framework in Java, how to validate the input and display any validation errors.
With JavaScript frameworks becoming more and more powerful, a lot of business logic is now done on the client side. This, however, can pose some security problems and here are three commonly found mistakes where server-side validation is omitted and parts of the web app are vulnerable because of this. We will be looking on role escalation, confidential information access, and more.
When I started LOGaritmical, one of the first functionalities that I implemented was registering a new user. This meant that I had to store the user’s password in the database in a secure way and I will need to be able to verify that the password entered during login is correct. This is something that is quite easy to implement incorrectly and you would be surprised (or not) at how many systems and websites store passwords in an incorrect way....
Using the power of Streams in Java 8 and with the help of Lambda Expressions we can do easy, fast and reliable manipulations on Collections. We can easily filter or sort lists as well as other operations, regardless of the overall complexity.
Using a unique ID for columns in a table is important. Besides the auto-increment option, we can use the Java UUID column, however, if we want it to be human-readable we need to store it in a VARCHAR column. This can be easily done using the @Type annotation in Hibernate
