InNoCenT_Ch1ld
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Database
Well, everytime i want to use Database in my Java app, i have to go to ODBC to select my database and add it. But my application couldnt locate the database if i move it to another folder..
so how am i suppose to make it like, no matter which folder i move my database, my application can still locate it? cause i couldnt tell where the user will put the application files and database..
so how am i suppose to make it like, no matter which folder i move my database, my application can still locate it? cause i couldnt tell where the user will put the application files and database..
Mick Barry
are we talking about an access db?
ASKER
yup..
wait, are you trying to "say" that only MS Access has this stupid problem?
wait, are you trying to "say" that only MS Access has this stupid problem?
not sure if its only access (probably not) but yes it is an access problem, because in your dsn you specify the location of the access db file. If you move it you need to update your dsn.
ASKER
so, how to avoid it? or should i use other db software?
normally how you guys do with your database? cause i dun want to set the User DNS.. (can it be done with another db?)
normally how you guys do with your database? cause i dun want to set the User DNS.. (can it be done with another db?)
if you don't want to use a DSN then you can specify the filename in your connection string. But you can't avoid specifying the filename somewhere as it needs to know where it is so it can be accessed.
Other DBMS (eg. mysql, SQL server etc) do not require you to specify a filename because the db is communicated with using sockets and not by directly accessing the filesystem.
Other DBMS (eg. mysql, SQL server etc) do not require you to specify a filename because the db is communicated with using sockets and not by directly accessing the filesystem.
ASKER
guess i have to "quit" the stupid MS Acess already... ;(
ASKER
btw, what you mean by "the db is communicated with using sockets "?
1. You could have a properties file and put the filepath there.
2. You could pass the connection string or the filepath in as a command line arg.
Depends on what your app does and how secure it has to be. This is terrible for security, but it would allow you to easily modify where the database is without hardcoding it in your source code or changing the dsn.
It's not a good idea to be moving the database file around. If you need to change it because you are deploying to another computer, there is probably a way to use relative path names rather than absolute path names ( "..\database.mdb" instead of "C:\Java\Myapp\Mydatabase\
Dorothy
2. You could pass the connection string or the filepath in as a command line arg.
Depends on what your app does and how secure it has to be. This is terrible for security, but it would allow you to easily modify where the database is without hardcoding it in your source code or changing the dsn.
It's not a good idea to be moving the database file around. If you need to change it because you are deploying to another computer, there is probably a way to use relative path names rather than absolute path names ( "..\database.mdb" instead of "C:\Java\Myapp\Mydatabase\
Dorothy
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