问题
Take notepad for example. You can open a file with notepad (right click and open with, or double clicking on the file if it is already associated with notepad) and it will display the contents of a file. I want to be able to open an xml file with the program that I am writing so that it can do some parsing and give a desired output. What sort of ways are there to do this in java? Do I have to ask for an argument to be passed into the program when it is opened? Would this be easier in C++ or some other language? If you need any further information please let me know -- this was the best way I could come up with to discribe my situation, which may be why my google searches have come up empty. Thank you in advance for your help!
回答1:
You can associate an extension with a java jar and the file name will be passed as args[0] It doesn't get much simpler than that. I suggest you try it with a "hello world" program. ;)
回答2:
display the contents of a file ..What sort of ways are there to do this in java?
Install/launch the app. using Java Web Start.
Java Web Start (JWS) is the Oracle Corporation technology used to launch rich client (Swing, AWT, SWT) desktop applications directly from a network or internet link. It offers 'one click' installation for platforms that support Java.
JWS provides many appealing features including, but not limited to, splash screens, desktop integration, file associations, automatic update (including lazy downloads and programmatic control of updates), partitioning of natives & other resource downloads by platform, architecture or Java version, configuration of run-time environment (minimum J2SE version, run-time options, RAM etc.), easy management of common resources using extensions..
Here is a demo. of the JNLP API file services (an API available to JWS apps.) that registers an interest (claims an association with) in the .zzz file-type in the launch file. Associations can also be done programmatically using the IntegrationService of the JNLP API.
来源：https://stackoverflow.com/questions/12320138/how-to-associate-a-file-with-a-program-in-java