file-management

来源： https://stackoverflow.com/questions/64580277/read-values-from-a-file-automatically-creating-variables-to-store-them

问题 I'm working on small project in java, there I want to fetch the contents from a database and write them into a PDF file. I tried to googling and came up with iText Library. Can anyone guide to create a PDF that looks like the enclosed image PS: I'm pretty new to JAVA.and it's my first java project. 回答1: I've done a quick implementation of most of your use-case. Here's the code: First we define a small class that acts as a single record in the invoice. static class Article{ int SNO; String

问题 When I am analyzing data, I save my dataframes into a csv-file and use pd.to_csv() for that. However, the function (over)writes the new file, without checking whether there exists one with the same name. Is there a way to check whether the file already exists, and if so, ask for a new filename? I know I can add the system's datetime to the filename, which will prevent any overwriting, but I would like to know when I made the mistake. 回答1: Try the following: import glob import pandas as pd #

问题 When I am analyzing data, I save my dataframes into a csv-file and use pd.to_csv() for that. However, the function (over)writes the new file, without checking whether there exists one with the same name. Is there a way to check whether the file already exists, and if so, ask for a new filename? I know I can add the system's datetime to the filename, which will prevent any overwriting, but I would like to know when I made the mistake. 回答1: Try the following: import glob import pandas as pd #

问题 It looks like on Cocoa there are many ways to move file/folder-directory to Trash: [[[NSWorkspace sharedWorkspace] performFileOperation:NSWorkspaceRecycleOperation] [[NSWorkspace sharedWorkspace] recycleURLs:] [NSFileManager trashItemAtURL:] [NSFileManager removeItemAtPath:] [NSFileManager removeItemAtURL:] It would be nice to understand what the difference is by either reading an explanation here or a link to the official Apple docs. Also if someone knows a universal way of moving a file/non

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . Hello there im stuck on this thing where i need to cycle through a certain dir that i need to get all the file names from and get there paths as a variable. I know how to create a loop, but to get the directory's contents, I do not. Any help is appreciated, thanks! 回答1: Try like this: // If your folder is a

问题 This post is a Community Wiki . Edit existing answers to improve this post. It is not currently accepting new answers. I want to delete a folder that contains thousands of files and folders. If I use Windows Explorer to delete the folder it can take 10-15 minutes (not always, but often). Is there a faster way in Windows to delete folders? Other details: I don't care about the recycle bin. It's an NTFS drive. 回答1: Use Windows Command Prompt: rmdir /s /q folder 回答2: The worst way is to send to

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . Is there a way to get all the files (last modified on a specific date), and save them into a new folder (with the name of the specific

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . Is there a way to get all the files (last modified on a specific date), and save them into a new folder (with the name of the specific

问题 I've got a simple question. In Xcode 3 I was able to lock a file by clicking on the little lock icon at the top of each file. I'm missing this function in Xcode 4. I think I'm just blind. Can you help me? 回答1: That feature was killed (partially) in Xcode 4. Even though you can Unlock a locked file from the File menu, you cannot Lock it. Even though locking files is still possible with the Finder, it is much more troublesome when you need to lock multiple files. The long way now involves right