Re: Java Database connect

From:
"Yogi" <yogi@THRWHITE.remove-dii-this>
Newsgroups:
comp.lang.java.databases
Date:
Wed, 27 Apr 2011 15:23:19 GMT
Message-ID:
<04c36811-96a3-4105-be47-e4cf5b52e02d@r24g2000prr.googlegroups.com>
  To: comp.lang.java.databases
On Nov 21, 7:53 pm, Yogi <yogeshkagra...@gmail.com> wrote:

On Nov 17, 8:17 pm, Yogi <yogeshkagra...@gmail.com> wrote:

On Nov 17, 6:02 pm, Yogi <yogeshkagra...@gmail.com> wrote:

On Nov 17, 5:57 pm, Sabine Dinis Blochberger <no.s...@here.invalid>
wrote:

Yogi wrote:

On Nov 17, 5:30 pm, Sabine Dinis Blochberger <no.s...@here.invali=

d>

wrote:

Yogi wrote:

On Nov 17, 2:30 pm, Sabine Dinis Blochberger <no.s...@here.in=

valid>

wrote:

Yogi wrote:

I am new to java and db connection pooling. I tried using=

 Apache's

DBCP for connection pool for my web application. Was t=

rying to do

similar thing for a standalone server (not a web based). =

 I tried

using DBCP but i am getting strange results. In my str=

ing variables,

i am getting "???" as output whereas for int variables i =

am getting

correct values when i m trying to read from database.


Make sure you use the correct encoding when connecting to t=

he databse,

for example, UTF-8. Refer to the manual of the database and=

 JDBC driver

for specifics.


This could be only a display problem then - on your other envir=

onment

you don't have the correct locales installed.


I am using Eclipse to execute my program and getting "???" in
Eclipse's console. One of my friend suggested to check for dep=

endent

jars while using Apache's DBCP. But what I am bothered about i=

s, if

dependent jars are not available, it should not give me correct v=

alues

for integer placeholders as well. Any comments?


If you were missing libraries, you would get an Exception telling y=

ou

so.

Ok, from the Javadocs [0]:

"public void print(String s)
Prints a string. If the argument is null then the string "null" is
printed. Otherwise, the string's characters are converted into byte=

s

according to the platform's default character encoding, and these b=

ytes

are written in exactly the manner of the write(int) method.

Parameters:
s - The String to be printed"

Instead of using System.out.println, use a logging facility?
Or set your environments default character encoding to UTF-8 [1]?

[0]
<http://java.sun.com/javase/6/docs/api/java/io/PrintStream.html#pri=

nt(...)>

[1] <http://dev.eclipse.org/mhonarc/lists/aspectj-users/msg07331.ht=

ml>

Ok. This might be one of the issues. I will check your solutions a=

nd

will update you. Thanks a ton for your inputs. :)


Still no progress. Here is how I modified my Test class:
--------------
   public static void main(String[] args){
           Test t1 = new Test();

           List <DInfo> dList = EngineDBManager.getDInfo(=

);

           BufferedWriter out=null;
           try {
               out = new BufferedWriter(new FileWrite=

r("c:\\test.out"));

           }catch(Exception e){
                  System.out.println("Not able to ope=

n file for writing");

           }

           OutputStreamWriter out1 = new OutputStreamWrit=

er(new

ByteArrayOutputStream());
           System.out.println("Printing Encoding type here:=

" +

out1.getEncoding());

           DInfo d = null;
           if (dList == null){
              System.out.println("DInfo is null");
           }else{
                   for (int i=0;i < dList.size();=

 i++){

                             d = (DInfo=

) dList.get(i);

                             System.out.p=

rintln("Id=" + d.getDID() + " Desc=" + d.getDDesc

());
                             try{
                                out.wri=

te("\nId="+ d.getDID() + " Desc=" + d.getDDesc());

                             }catch(Excep=

tion e){

                                System.=

out.println("error writing to file for=" +

dist.getDistrictID());
                             }
                   }
           }
           try{
              out.close();
           }catch(Exception e){

           }

   }
--------------------
I am getting "???" description. I changed encoding of Eclipse to UTF=

8.

I tried all possible ways but still no success. Any setting required
in eclipse or at db level? Any suggestions?


Hi Guys,
got it working. Its my stupidity that I did not include
"nls_classes12.jar" in my classpath. After doing that it is working
perfectly fine.
If you have Oracle installed, you will get this jar from $ORACLE_HOME/
jdbc/lib path. Hope this helps. :)

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