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java - Writing to a file does not recognize \n and \t as escape characters

I have records in database that contains \n.
NAME | ROW | COL
-------------------------------
name | 1 | 1
address | 1 | 2
tel\n no | 1 | 3
employeed\n id | 1 | 4
Then, I also save my delimiter , for text writing, in Database (\t)
DELIMITER | FILENAME_LOCATIO
----------------------
\t | SAMPLETEXT
Then, when I already want to write those values(first table) to a text file, it prints like this..it does not recognized the escape characters, instead it printed as ordinary text
name\taddress\ttelno\n no\temployeed\n id
Text file should look like this..
name address telno
no employeed
id
Here is the code im using..
FileWriter fw = new FileWriter(config.get("FILENAME_LOCATION").toString(), true);
BufferedWriter w = new BufferedWriter(fw);
List<Map<String, Object>> headers = sampleMapper.selectHeader();
for (Iterator<Map<String, Object>> iterator = headers.iterator(); iterator.hasNext();) {
Map<String, Object> map = (Map<String, Object>) iterator.next();
w.write(map.get("NAME").toString());
w.write(config.get("DELIMITER").toString()); // returns \t in String format
}
w.close();

It might depend on the OS you are running your application on, at least for the line delimiter.
try (BufferedWriter w = new BufferedWriter(new FileWriter("c:\\test.txt", false)))
{
w.write("hello");
w.write("\t");
w.write("hello");
w.write(System.getProperty("line.separator"));
w.write("world");
w.write("\t");
w.write("world");
}
catch (IOException e)
{
e.printStackTrace();
}
This code runs fine on my Windows, as the system property will provide you with the correct delimiter for the machine you're on (on Windows, it is \r\n).
According to this question, \t should work, and it does for me. It might be that your config does not give you a tab, but "\\t", which means a literal \ and a t. In that case, you could store the ascii char for tab in the database instead of \t.

Spring MVC Endpoint not fetch while pass empty map {} into GET Request

Facing the issue into the endpoint fetching
Below is the case while I call the api get the response.
http://localhost:28080/restServices/apps/1762/users/USERNAME/?password=PASSWORD
But when ever I set following data it's not working could any body help me out into this issues.
http://localhost:28080/restServices/apps/1762/users/USERNAME/?password=PASSWORD&data={}
#RequestMapping(value = "/apps/{appId_}/users/{username_}", method = RequestMethod.GET)
#ResponseBody
#Transactional
public UserResponseDTO getUserAndToken(#PathVariable Long appId_, #PathVariable String username_, #RequestParam("password") String password_, #RequestParam("data") String datas) throws Exception {
//do stuff
}
EDIT
This problem with any edit it's works into the Tomcat Version 7.0.63 While another version 7.0.73, 8.0.x + not working.

You forgot to specify {appId_} in value = "/apps/users/{username_}"
Fix: value = "/apps/{appId_}/users/{username_}"
~~~
Your method accepts #RequestParam("data") String datas
and you're sending data={}
String should be quoted so the fix is data=""

This kind of behaviour affect of major update of Tomcat.
For a quick fix, you can downgrade to one of older versions, I downgraded tomcat with 7.0.63 .
After getting more R&D on Spring MVC It's reject the request while adding list of invalid character into request listed below.
Excluded US-ASCII Characters disallowed within the URI syntax:
control = <US-ASCII coded characters 00-1F and 7F hexadecimal>
space = <US-ASCII coded character 20 hexadecimal>
delims = "<" | ">" | "#" | "%" | <">
List of unwise characters are allowed but may cause problems:
unwise = "{" | "}" | "|" | "\" | "^" | "[" | "]" | "`"
The following characters are reserved within a query component and have special meaning within a URI/URL:
reserved = ";" | "/" | "?" | ":" | "#" | "&" | "=" | "+" | "$" | ","
For more information visit.
Solution:
encodeURI("http://localhost:28080/restServices/apps/1762/users/USERNAME/?password=PASSWORD&data={}")
> http://localhost:28080/restServices/apps/1762/users/USERNAME/?password=PASSWORD&data=%7B%7D

Need to filter, parse and sort multiple log files

I have a need to collect a subset of info from log files that reside on one-to-many log file servers. I have the following java code that does the initial data collection/filtering:
public String getLogServerInfo(String userName, String password, String hostNames, String id) throws Exception{
int timeout = 5;
String results = "";
String[] hostNameArray = hostNames.split("\\s*,\\s*");
for (String hostName : hostNameArray) {
SSHClient ssh = new SSHClient();
ssh.addHostKeyVerifier(new PromiscuousVerifier());
try {
Utils.writeStdOut("Parsing server: " + hostName);
ssh.connect(hostName);
ssh.authPassword(userName, password);
Session s = ssh.startSession();
try {
String sh1 = "cat /logs/en/event/event*.log | grep \"" + id + "\" | grep TYPE=ERROR";
Command cmd = s.exec(sh1);
results += IOUtils.readFully(cmd.getInputStream()).toString();
cmd.join(timeout, TimeUnit.SECONDS);
Utils.writeStdOut("\n** exit status: " + cmd.getExitStatus());
} finally {
s.close();
}
} finally {
ssh.disconnect();
ssh.close();
}
}
return results;
}
The results string variable looks something like this:
TYPE=ERROR, TIMESTAMP=10/03/2015 07:14:31 253 AM, HOST=server1, APPLICATION=app1, FUNCTION=function1, STATUS=null, GUID=null, etc. etc.
TYPE=ERROR, TIMESTAMP=10/03/2015 07:14:59 123 AM, HOST=server1, APPLICATION=app1, FUNCTION=function1, STATUS=null, GUID=null, etc. etc.
TYPE=ERROR, TIMESTAMP=10/03/2015 07:14:28 956 AM, HOST=server2, APPLICATION=app1, FUNCTION=function2, STATUS=null, GUID=null, etc. etc.
I need to accomplish the following:
What do I need to do to be able to sort results by TIMESTAMP? It is unsorted right now, because i am enumerating one to many files, and appending results to end of a string.
I only want a subset of "columns" returned, such as TYPE, TIMESTAMP, FUNCTION. I thought i could REGEX it in the grep, but maybe arrays would be better?
Results are simply being printed to console/report, as this is only printed for failed tests, and is there for troubleshooting purposes only.

I took the list of output that you provided and put it in a file, named test.txt, making sure that each "TYPE=ERROR etc. etc" was in a new line (I guess it's the same in your output, but it isn't clear).
Then I used cat test.txt | cut -d',' -f1,2,5 | sort -k2 to do what you want.
cut -d',' -f1,2,5 basically splits by comma and only reports tokens number 1,2,5 (TYPE,TIMESTAMP,FUNCTION). If you want more, you can add more numbers depending on what token you want
sort -k2 sorts according to the 2nd column (TIMESTAMP)
The output I get is:
TYPE=ERROR, TIMESTAMP=10/03/2015 07:14:28 956 AM, FUNCTION=function2
TYPE=ERROR, TIMESTAMP=10/03/2015 07:14:31 253 AM, FUNCTION=function1
TYPE=ERROR, TIMESTAMP=10/03/2015 07:14:59 123 AM, FUNCTION=function1
So what you should try and do, is to further pipe your command with |cut -d',' -f1,2,5 | sort -k2
I hope it helps.

After working on this some more, i come to find that one of the key/value pairs allows commas in the values, thus cut will not work. Here is the finished product:
My grep command stays the same, collecting data from all servers:
String sh1 = "cat /logs/en/event/event*.log | grep \"" + id + "\" | grep TYPE=ERROR";
Command cmd = s.exec(sh1);
results += IOUtils.readFully(cmd.getInputStream()).toString();
Put the string into an array, so i can process them line by line:
String lines[] = results.split("\r?\n");
I then used regex to get the data i needed, repeating the below for each line in the array, and for as many columns as needed. It's a bit of a hack, I probably could have done it better by simply replacing the comma in the offending key/value pair, then using SPLIT() and comma as delimeter, then looping for the fields i want.
lines2[i] = "";
Pattern p = Pattern.compile("TYPE=(.*?), APPLICATION=.*");
Matcher m = p.matcher(lines[i]);
if (m.find()) {
lines2[i] += ("TYPE=" + m.group(1));
}
Finally, this will sort by Timestamp, since it is 2nd column:
Arrays.sort(lines2);

find the last match with java/regex

I have a dynamic text that contains "font-family", for example:
style="font-family: "Calibri","sans-serif"; font-size:11pt";
And I want to remove all the font-family element.
I was using this code
patron = Pattern.compile("font-family:(.*?);");
encaja = patron.matcher(cadena);
nueva = encaja.replaceAll("");
But it remove in a way that isn't useful for me:
style="Calibri","sans-serif"; font-size: 11pt;"
What I want is:
style=" font-size: 11pt;"
I also tried using this pattern
font-family:[^(&.*;)]*?;
But it doesn't work.
Can you help me?
Thanks
EDIT
More case examples:
in: style="font-size:15px; font-family:Arial; mso-ascii-theme-font: minor-latin; "
output: style="font-size:15px; mso-ascii-theme-font: minor-latin;"
in: style="font-family:Arial,Aás;; font-size:11pt; mso-fareast-mso-fareast-theme-font: minor-latin;"
output:style="font-size:11pt; mso-fareast-mso-fareast-theme-font: minor-latin;"

You can use this:
String result = yourstr.replaceAll("(?i)font-family:(?>[^;&\"]++|&(?>quot|ntilde);)*(?>;\\s*+|(?=\"))", "");
pattern description:
(?i) # make the pattern case-insensitive
font-family:
(?> # open an atomic group
[^;&\"]++ # all characters except ; & and " one or more times (possessive)
| # OR
& # literal &
(?> # put the different possibilities here
quot
|
ntilde
)
; # literal ;
)* # repeat the atomic group zero or more times
(?>
;\\s*+ # literal ; and trailing spaces
|
(?=\") # followed by " (last value of the attribute without trailing ; )
)
Another but less safer way (IMO): skip all letters that are between a & and a ; :
String result = yourstr.replaceAll("(?i)font-family:(?>[^;&\"]++|&[a-z]++;)*(?>;\\s*+|(?=\"))", "");

Try this:
newstr = str.replaceFirst("font-family:\s?([^\s]+)", "");

JavaCC: How to handle tokens that contain common words

I'm trying to create a parser for source code like this:
[code table 1.0]
code table code_table_name
id = 500
desc = "my code table one"
end code table
... and here below is the grammar I defined:
PARSER_BEGIN(CodeTableParser)
...
PARSER_END(CodeTableParser)
/* skip spaces */
SKIP: {
" "
| "\t"
| "\r"
| "\n"
}
/* reserved words */
TOKEN [IGNORE_CASE]: {
<CODE_TAB_HEADER: "[code table 1.0]">
| <CODE_TAB_END: "end" (" ")+ <CODE_TAB_BEGIN>>
| <CODE_TAB_BEGIN: <IDENT> | "code" (" ")+ "table">
| <ID: "id">
| <DESC: "desc">
}
/* token images */
TOKEN: {
<NUMBER: (<DIGIT>)+>
| <IDENT: (<ALPHA>)+>
| <VALUE: (<ALPHA> ["[", "]"])+>
| <STRING: <QUOTED>>
}
TOKEN: {
<#ALPHA: ["A"-"Z", "a"-"z", "0"-"9", "$", "_", "."]>
| <#DIGIT: ["0"-"9"]>
| <#QUOTED: "\"" (~["\""])* "\"">
}
void parse():
{
}
{
expression() <EOF>
}
void expression():
{
Token tCodeTab;
}
{
<CODE_TAB_HEADER>
<CODE_TAB_BEGIN>
tCodeTab = <IDENT>
(
<ID>
<DESC>
)*
<CODE_TAB_END>
}
The problem is that the parser correctly identifies token ("code table")... but it doesn't identifies token IDENT ("code_table_name") since it contains the words already contained in token CODE_TAB_BEGIN (i.e. "code"). The parser complains saying that "code is followed by invalid character _"...
Having said that, I'm wondering what I'm missing in order to let the parser work correctly. I'm a newbie and any help would be really appreciated ;-)
Thanks,
j3d

Your lexer will never produce an IDENT because the production
<CODE_TAB_BEGIN: <IDENT> | "code" (" ")+ "table">
says that every IDENT can be a CODE_TAB_BEGIN and, as this production comes first, it beats the production for IDENT by the first match rule. (RTFFAQ)
Replace that production by
<CODE_TAB_BEGIN: "code" (" ")+ "table">
You will run into trouble with ID and DESC, but this gets you past the second line of input.