I have a spring MVC project that I have develop for my team at work. I have an endpoint that create a workbook using apache poi, then export to .xlsx file, but my code appeared to write to file on the application host instead of user’s computer. I know I’m missing something, but I try what I found on internet
Tag: java
Spring autowiring dependency with constructor arguments
I have created a service class, TestService whose constructor takes an array of Strings and has a little logic to return a list of Strings with length greater than 5. How do I get about injecting this into my Controller class with the array of Strings argument? Answer I think it is impossible. Instead inject String[] testStrings holder: However, in
How to use the custom CSS in JavaFX without getting warning?
I am working on making a custom style for the label but when I’m calling it I’m getting the following warning Feb 06, 2021 7:54:12 PM com.sun.javafx.css.StyleManager loadStylesheetUnPrivileged WARNING: Resource “@Field-background” not found. which doesn’t make my code to get the custom CSS effect. MY Code: MY CSS Any Advise. Answer Your CSS selector .field-background is a class selector. Thus
Coin change logic
Im stuck at this problem about the change of a vending machine (using 10ct, 20 ct, 50ct, 100ct and 200ct-coins.) So lets say coffee costs 40cts. The user throws in 2€ (labeled 200cts). Now im supposed to figure out how the change of 160cts is given back to the user. There are 2 conditions: A) Taking the shortest combination, but
Get old value if data is not found
I want to implement cache based on this requirement: When we insert a key with the same value we need to keep the old value When we want to get a key we need we need also to send additional param timestamp which shows us which exactly value to get So far I did this: Answer Use a TreeSet (docs),
Retrieving image from SQLite Database (BLOB data type)
I have tried to retrieve the byte[] from my SQLite DB using the code: Error returned: Answer Your query: returns only 1 column and since the column indices in a cursor are 0 based, you should retrieve it with: Also, you should use moveToFirst() to check if the cursor returned any rows before retrieving the column’s value:
Why does this regex fails to check accurately?
I have the following regex method which does the matches in 3 stages for a given string. But for some reason the Regex fails to check some of the things. As per whatever knowledge I have gained by …
I want to remove space happend after removing substring [closed]
public class RemoveString { public String removingOccurences(String input1, String input2) { String newString = input1.replaceAll(input2, ” “); return newString; } …
How to load image in Picasso correctly
**Hi, i’m trying load images from url like this: link As you can see, the images have different sizes. For example, the first image is 1920×1280 in size. The second image is 720×11523 in size and the last image is 720×5420 in size. But, this in my application looks like this: In this link As you can see, the images
What is the difference between get() and addListenerForSingleValueEvent?
I see a lot of tutorials, documentation and questions about using the Firebase Realtime Database on Android talk about the addListenerForSingleValueEvent method. This method reads the value from the database once, which is what I want to do. But in the auto-complete in my IDE and in the documentation I also see a method called get(), which also seems to