Radoslaw Sztando

Confused regarding isErrorPage

I used EL:

15 years ago

Confused regarding isErrorPage

Guys,

I read page directive specification and it says:

isErrorPage="true | false"
Whether the JSP file displays an error page. If set to true, you can use the exception object in the JSP file. If set to false (the default value), you cannot use the exception object in the JSP file.

However I prepared error page without isErrorPage directive and I still can use exception object in it.
I tried both ways of configuring it as error page (in DD and using errorPage page directive in 'faulty' jsp). I also tried setting isErrorPage implicitly to "false".
It still works!

Is it a matter of Container? I use Tomcat 6.0

15 years ago

Limiting access to resource

Guys,

I have following structure of webapps dir

[d]webapps
--[d]Test
----test.txt
----[d]WEB-INF
------web.xml
----[d]archive
------file1.txt
------file2.txt

I want to
1) have access to list of files and files itself in archive dir when someone goes to URL http://.../Test/archive/
2) no access to list of files and files itself in Test dir

I tried DefaultServlet with listings = true mapped to url = /archive/ in my web.xml. What I achieved is requirement 1) and part of 2) - user cannot list Test dir by going to http://.../Test/
BUT user can still access test.txt by explicitly naming it in URL like http://.../Test/test.txt
How to limit access to this file (and all files in Test dir)?

Thanks in advance!

15 years ago

SCWCD after SCJP 1.4

Hi,

some time ago I passed SCJP 1.4 and now I'd like to take SCWCD. Do I need to take upgrade exam (to SCJP 5 or 6)?

15 years ago

PreparedStatement and 'null' value in WHERE clause

Hi,

Why above code does not update column AGE for all records which NAME is null? In normal query I would rather use "...WHERE NAME IS NULL" for this case but I want to have general solution (handling both NULL and not NULL values in WHERE clause). Guys, do you have any idea how to do it?

17 years ago

JDBC and Relational Databases

I can post some code (when I'll get home). Another thing is that I tried to connect COM1 and COM2 using cable and run two Java applications one is writing to COM1 and second is listening on COM2. Sequence was sent correctly - without any additional bytes. So I cannot reproduce it without this specific configuration.

I forgot to mention that electronic device is connected to USB and its drivers simulate it as RS232 port.

18 years ago

Not good :/
What's more when I use standard win32 HyperTerminal I got correct sequence.

18 years ago

InputStream - sorry for confusion.
I read data from InputStream using read() method.

18 years ago

All,

I'm writing an application which communicates with some electronic
device by serial port.
I'm using javax.comm library (class SerialPort).

I wrote some test cases to test if communication works. Device just
sends 128 bytes starting from 0 to 128.
The problem appears that when device sends byte 0x0A application receives two bytes 0x0D and 0x0A.
It looks like Windows end-of-line. Can I somehow modify OutputStream mode (from "ascii" to binary)?

Any help will be appreciated.

18 years ago