The question is based on getting a spring model attribute list element using an index from javascript on which explains that each name of the html element must contain an index. Example user[0] I have a form that allows the user to dynamically add or remove elements from the list before submitting it. Let me …
Tag: java
Regex to extract valid Http or Https
I’m currently having some issues with a regex to extract a URL. I want my regex to take URLS such as: Through some tutorials, I’ve learned that this regex will find all the above: ^(http|https)://.*$ however, it will also take http://local:1000;http://invalid http://khttp://as a single string when…
What’s the difference between a Future and a Promise?
What’s the difference between Future and Promise? They both act like a placeholder for future results, but where is the main difference?
COPY FROM and C3PO connection pool in Postgres
I have the follow code in my JAVA program that allows me to copy data from a file into my Postgres database: This code works fine, but I would like to use a connection pool to manage my connections, as I have this code running for numerous files. So I used C3P0. However, when i get a connection from the
Convert JSON String to Pretty Print JSON output using Jackson
This is the JSON string I have: I need to convert the above JSON String into Pretty Print JSON Output (using Jackson), like below: Can anyone provide me an example based on my example above? How to achieve this scenario? I know there are lot of examples, but I am not able to understand those properly. Any hel…
Thymeleaf: how to get URL attribute value
I can’t find any solution for getting attribute from URL using Thymeleaf. For example, for URL: I need to get “error” attribute value. Also I’m using SpringMVC, if it could be helpful. Answer After some investigation I found that it was Spring EL issue actually. So complete answer with…
How to suppress FindBugs warnings for fields or local variables?
I would like to suppress FindBugs warnings for specific fields or local variables. FindBugs documents that the Target can be Type, Field, Method, Parameter, Constructor, Package for its edu.umd.cs.findbugs.annotations.SuppressWarning annotation [1]. But it does not work for me to annotate the field, only when…
Creating ASN1 encoded signature in C# to send to Java
I have a private/public secure cert. My Java counterparts have the public key. I have the need to take a string, sign it, and send it along to Java to then verify the data and signature. There appears to be a well known issue with how Microsoft and the rest of the world encodes/signs data, something about the…
Hibernate startup very slow
For some reason, the startup of my hibernate application is unbarrably slow. (up to 2 min) I have been thinking that the c3p0 configuration is plain wrong (related question) but studying the logs shows, that there is no activity just after the connection to the server is established. Also, using the built-in …
Append a single character to a string or char array in java?
Is it possible to append a single character to the end of array or string in java. Example: Answer