Text parsing and java
I'd like to develop a java application that takes an .html plain text file and finds an html table within the file, and puts that table into a jtable (formatting it according to my preferences). I'm assuming a text parser would be my best bet. I can build my own text parser, but I'd like to avoid the work if there's an efficient parser in the API. Is there?
These examples from [url http://javaalmanac.com/egs/javax.swing.text.html/pkg.html]Java Developers Almanac might help you out.
Similar Messages
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Question About Xerces Parser and Java JAXP
Hi,
I have confusion about both of these API Xerces Parser and Java JAXP ,
Please tell me both are used for same purpose like parsing xml document and one is by Apache and one is by sun ?
And both can parse in SAX, or DOM model ?
Is there any difference in performane if i use xerces in my program rather then JAXP, or is ther any other glance at all.
Please suggest some thing i have and xml document and i want to parse it.
ThanksHi
Xerces is Apaches implementation of W3C Dom specifiacation.
JAXP is a API for XML parsing its not implementation.
Sun ships a default implementation for JAXP.
you have factory methods for selecting a parser at run time or you can set in some config file about what is the implementaion class for the SAXParser is to be chosen (typically you give give the class file of xerces sax parser or dom parser etc..)
go to IBM Developerworks site and serch for Xerces parser config. which have a good explination of how to do it.
and browse through j2ee api .may find how to do it. -
Text Parsing and the Competence of the Programmer
Often we as programmers are encouraged to devise our own algorithims to accomplish certain tasks. I know we use prewritten code in zibraries/packages to eliminate reduncancies in code and to more easily implement tasks that we frequently need to. We also read tutorials on how to do certain things. After we practice writing the code within the guidlines of the code presented in the tutorial, it becomes easy for us to implement the things those tutorials tought us. However, I want to ask the question: If we fail to implement certain functionalities because we could not then devise the needed code, and we still succeed in doing so by following a pattern we find in tutorials, does that prove that we do not have a knack for programming, and that we are not as gifted as we thought we are? I mean, if I attempt to write a class that can translate a certain style of speech into another (for example: prep talk, slang etc, to propper English) and I fail to find a way to do it, but learn the basic pattern of algorithims necessary to do it and implement it following that pattern. (Or even if I simply learn the mechanics of it and implement it with my understanding of those mechanics) does that mean I am a poor programmer?
Tell me, what is your opinion? Just what does it mean if I do that?Hmmm I'm not sure exactly what you're aiming at... Finding algorithms to accomplish what you want does seem to require a good level of intelligence but whether or not you succeed in solving a particular problem also largely depends on the problem itself. Some things are just complex and it's not a shame if you don't find a solution in a short time. Some problems can even be proven to be very hard to solve (NP-completeness), see the funny picture with the boss here: http://www.codinghorror.com/blog/archives/001270.html.
To stay in the spirit of your example, try making a good text translator. Just for fun check out google translate or bablefish and translate between two languages you know reasonably well. Sometimes the results are good sometimes they are just plain bad.
Does that mean the programmers of these tools are bad programmers? I'd think the problem of translating text is simply a very complex matter. Yes better programmers may build better text translators, but it doesn't mean you are a bad programmer if you can't write one in a short time.
As you pointed out there are good libraries and tutorials out there and we shouldn't hesitate to use them. We should learn from what others have done and avoid reinventing the wheel. This too can be sometimes hard in practice. Even with the internet at my disposal and knowing that someone else out there has solved the same problem that I'm facing!
Certainly for parsing text I would not try to reinvent the wheel but look up existing solutions. At the least have a look at what regular expressions can do for you; they can save you heaps of procedural code.
But yes, in practice you will not always find a textbook example and you have to break up your problem in subproblems yourself. This is not only a matter of intelligence but also a matter of experience and of trying different ways to look at the same problem. -
Hi,
I'm extremely new to Java and need to read and parse a text file and generate a new text file with modifications as follows:
1. Ignore and rewrite comments
2. Ignore and rewrite compiler commands
3. (a) Modify function prototypes be removing their return values, if any,
(b) append an '_VAR' to the function name and args
(c) add an ampersand to the args when passed by reference
sample input file:
/***** comment *****/
#if (INCLUDE_STATIC_BUILD == OS_FALSE)
extern OS_MEMORY_POOL *MEM_Non_Cached;
#endif
UINT16 TLS_IP_Check (const UINT16 *s, UINT16 len);
INT32 MEM_Copy_Data(NET_BUFFER buf_ptr, const CHAR HUGE buffer, INT32 numbytes, UINT16 flags);
sample output file:
/***** comment *****/
#if (INCLUDE_STATIC_BUILD == OS_FALSE)
extern OS_MEMORY_POOL *MEM_Non_Cached;
#endif
UINT16_VAR = TLS_IP_Check (&UINT16_VAR, UINT16_VAR);
INT32_VAR = MEM_Copy_Data(&NET_BUFFER_VAR, name, INT32_VAR, UINT16_VAR);
I would appreciate any help!
Thanks.Check replies on the other post
http://forum.java.sun.com/thread.jspa?threadID=680728&tstart=0 -
Where does this java program read a text file and how does it output the re
someone sent this to me. its a generic translator where it reads a hashmap text file which has the replacement vocabulary etc... and then reads another text file that has what you want translated and then outputs translation. what i don't understand is where i need to plugin the name of the text files and what is the very first line of code?
[code
package forums;
//references:
//http://forums.techguy.org/development/570048-need-write-java-program-convert.html
//http://www.wellho.net/resources/ex.php4?item=j714/Hmap.java
import java.util.Map;
import java.util.HashMap;
import java.util.Iterator;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.FileReader;
public class Translate {
public static void main(String [] args) throws IOException {
if (args.length != 2) {
System.err.println("usage: Translate wordmapfile textfile");
System.exit(1);
try {
HashMap words = ReadHashMapFromFile(args[0]);
System.out.println(ProcessFile(words, args[1]));
} catch (Exception e) {
e.printStackTrace();
// static helper methods
* Reads a file into a HashMap. The file should contain lines of the format
* "key\tvalue\n"
* @returns a hashmap of the given file
@SuppressWarnings("unchecked")
private static HashMap ReadHashMapFromFile(String filename) throws FileNotFoundException, IOException {
BufferedReader in = null;
HashMap map = null;
try {
in = new BufferedReader(new FileReader(filename));
String line;
map = new HashMap();
while ((line = in.readLine()) != null) {
String[] fields = line.split("\\t", 2);
if (fields.length != 2) continue; //just ignore "invalid" lines
map.put(fields[0], fields[1]);
} finally {
if(in!=null) in.close(); //may throw IOException
return(map); //returning a reference to local variable is safe in java (unlike C/C++)
* Process the given file
* @returns String contains the whole file.
private static String ProcessFile(Map words, String filename) throws FileNotFoundException, IOException {
BufferedReader in = null;
StringBuffer out = null;
try {
in = new BufferedReader(new FileReader(filename));
out = new StringBuffer();
String line = null;
while( (line=in.readLine()) != null ) {
out.append(SearchAndReplaceWordsInText(words, line)+"\n");
} finally {
if(in!=null) in.close(); //may throw IOException
return out.toString();
* Replaces all occurrences in text of each key in words with it's value.
* @returns String
private static String SearchAndReplaceWordsInText(Map words, String text) {
Iterator it = words.keySet().iterator();
while( it.hasNext() ) {
String key = (String)it.next();
text = text.replaceAll("\\b"+key+"\\b", (String)words.get(key));
return text;
* @returns: s with the first letter capitalized
String capitalize(String s)
return s.substring(0,0).toUpperCase() + s.substring(1);
}without what arguments?Without any arguments. If there are no arguments, there are no arguments of any kind. If you have a zoo with no animals in it, it's not meaningful to ask whether the animals which are not there are zebras or elephants.
does it prompt me to give it a text file name?Apparently.
when i run it this is all i get:
usage: Translate wordmapfile textfile
Press any key to continue...Right. And "wordmapfile" is almost certainly supposed to be a file that holds the word map, and "textfile" is almost certainly the file of text that it's going to translate. -
Parse Exception : java.text.ParseException: Unparseable date
I have inherited a UDF in some mapping that on the whole, works okay...
but it throws an error after mapping a few dates:
Parse Exception : java.text.ParseException: Unparseable date: "2010-03-18T00:00:00.000Z"
Parse Exception : java.text.ParseException: Unparseable date: "2010-03-23T23:59:00.000Z"
Parse Exception : java.text.ParseException: Unparseable date: "2010-03-18T00:00:00.000Z"
Parse Exception : java.text.ParseException: Unparseable date: "2010-03-23T23:59:00.000Z"
Parse Exception : java.text.ParseException: Unparseable date: "2010-03-18T00:00:00.000Z"
Parse Exception : java.text.ParseException: Unparseable date: "2010-03-23T23:59:00.000Z"
the first few map okay... then i get the exception.
the UDF is as follows:
public String convertDateTimeToUTC(String strDate, Container container) throws StreamTransformationException{
AbstractTrace trace = container.getTrace();
Date date=null;
SimpleDateFormat sdfSource = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ");
try{
String dt = strDate;
date = sdfSource.parse(dt);
trace.addInfo("Local Date:"+date);
SimpleDateFormat sdfDestination = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");
strDate = sdfDestination.format(date);
catch(ParseException pe){
trace.addInfo("Parse Exception : " + pe);
return strDate;
can anyone see why this fails after successfully mapping a few fields???the first mapping works correctly...
then we reuse the same fields to map to the additional segments.
the context is correct as it is trying to pull the same fields in... it just throw the error with the same data in the same UDF/Function Library but for different segments! :o(
http://img199.imageshack.us/img199/3104/dateconversion.jpg
as you can see from the screenshot above, the mapping works in the first instance, then fails on subsequent nodes. -
Simple XML to Text onversion using XSLT and Java?
Hi all!
I'm completly new to using XSLT and Java and are trying to convert a XML file into a ordinary Textfile that I am gonna import into another application.
I started up writing a ordinary XML parser in Java which interpreted the XML file, but realized later on that it was possible to do with a ordinary XSLT.
So far it is a 2-step process right now, I've tied my XSLT to the XML file and then just open the XML file up in a ordinary browser and then get the result.
I found an example (http://www.onjava.com/pub/a/onjava/excerpt/java_xslt_ch5/index.html?page=3) where u hook up a XML file and a XSL file separately and the process it, and dump it to Stdout. But do I need to hook up a XSL file like this when the XML file is tied to a XSL file internally?Just to give you an example to show you how easy it is: http://www.daniweb.com/forums/thread137587.html
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SAX Parser Validation with Schemas (C, C++ and JAVA)
We are currently using the Oracle XML Parser for C to parse and validate XML data using the SAX parser interface with validation turned on. We currently define our XML with a DTD, but would like to switch to schemas. However, the Oracle XML Parser 9.2.0.3.0 (C) only validates against a DTD, not a schema when using the SAX interface. Are there plans to add schema validation as an option? If so, when would this be available? Also, the same limitation appears to be true for C++ and JAVA. When will any of these provide SAX parsing with schema validation?
Thanks!
JohnWill get back to you after checked with development team...
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Loading large text files into java vectors and outof memmory
Hi there,
need your help for the following:
i'm trying to load large ammoubnts of data into a Vector in order to concatenate several text files and treat them, but i'm getting outofmemory error. I even tried using xml structure and saving to database but the error is still the same. Can you help?
thanks
here's the code:
public void Concatenate() {
try {
//for(int i=0;i<1;i++) {
vEntries = new Vector();
for(int i=0;i<BopFiles.length;i++) {
MainPanel.WriteLog("reading file " + BopFiles[i] + "...");
FileInputStream fis = new FileInputStream(BopFiles);
BufferedInputStream bis = new BufferedInputStream(fis);
DataInputStream in = new DataInputStream(bis);
String line = in.readLine();
Database db = new Database();
Connection conn = db.open();
while(line != null) {
DivideLine(BopFiles[i], line);
line = in.readLine();
FreeMemory(db, conn);
MainPanel.WriteLog("Num of elements: " + root.getChildNodes().getLength());
MainPanel.WriteLog("Done!");
} catch (Exception e) {
e.printStackTrace();
public void DivideLine(String file, String line) {
if (line.toLowerCase().startsWith("00694")) {
Header hd = new Header();
hd.headerFile = file;
hd.headerLine = line;
vHeaders.add(hd);
} else if (line.toLowerCase().startsWith("10694")) {
Line entry = new Line();
Vector vString = new Vector();
Vector vType = new Vector();
Vector vValue = new Vector();
entry.name = line.substring(45, 150).trim();
entry.number = line.substring(30, 45).trim();
entry.nif = line.substring(213, 222).trim();
entry.index=BopIndex;
entry.message=line;
entry.file=file;
String series = line.substring(252);
StringTokenizer st = new StringTokenizer(series, "A");
while (st.hasMoreTokens()) {
String token=st.nextToken();
if(!token.startsWith(" ")) {
vString.add(token);
vType.add(token.substring(2,4));
vValue.add(token.substring(4));
token=null;
entry.strings= new String[vString.size()];
vString.copyInto(entry.strings);
entry.types= new String[vType.size()];
vType.copyInto(entry.types);
entry.values= new String[vType.size()];
vValue.copyInto(entry.values);
vEntries.add(entry);
entry=null;
vString=null;
vType=null;
vValue=null;
st=null;
series=null;
line=null;
file=null;
MainPanel.SetCount(BopIndex);
BopIndex ++;
public void FreeMemory(Database db, Connection conn) {
try {
//db.update("CREATE TABLE entries (message VARCHAR(1000))");
db.update("DELETE FROM entries;");
PreparedStatement ps = null;
for( int i=0; i<vEntries.size(); i++ ) {
Line entry = (Line) vEntries.get(i);
String value = "" + entry.message;
if(!value.equals("")) {
try {
ps = conn.prepareStatement("INSERT INTO entries (message) VALUES('" + Tools.RemoveSingleQuote(value) + "');");
ps.execute();
} catch(Exception e) {
e.printStackTrace();
System.out.println("error in number->" + i);
MainPanel.WriteLog("Releasing memory...");
vEntries = null;
vEntries = new Vector();
System.gc();
} catch (Exception e1) {
e1.printStackTrace();Well, i need to treat those contents, and calculate values withing those files, so wrinting files using FileInputstream wont do. for instance i need to get line 5 from file 1, split it, grab a value according to its class (value also taken) and compare it with another line of another file, adding those values to asingle file.
that's why i need vector capabilities, but since these files have more than 5 Mb each, an out of memory error is returned by loading those values into vector.
A better explanaition:
Each file has a line like
CLIENTNUM CLASS VALUE
so if the client is the same withing 2 files, i need to sum the lines into a single file.
If class is the same, then sum values, if not add it to the front.
we could have a final line like
CLIENTNUM CLASS1 VALUE1 CLASS2 VALUE2 -
Parsing xml using DOM parser in java
hi there!!!
i don have much idea about parsing xml.. i have an xml file which consists of details regarding indentation and spacing standards of C lang.. i need to read the file using DOM parser in java n store each of the attributes n elements in some data structure in java..
need help as soon as possible!!!DOM is the easiest way to parse XML document, google for JDOM example it is very easy to implement.
you need to know what is attribute, what is text content and what is Value in XML then easily you can parse your document with dom (watch for space[text#] in your XML document when you parse it).
you get root node then nodelist of childs for root then go further inside, it is easy believe me. -
ANN: XML Parser for Java v2.0.2.5
The v2.0.2.5 of the XML Parser for Java is now available for
download. The following features and bug fixes are included:
Conformance to the XSLT/XPATH October PR.
Support for internationalized error messages has been added. The
locale can be set using setLocale(java.util.Locale) function in
XSLProcessor, SAXParser, and DOMParser.
New APIs in XMLNode class:
value-of(String pattern)
selectNodes(String pattern)
selectSingleNode(String pattern)
selectSingleNode(String pattern, NSResolver ns)
New API in XSLStylesheet class
setParam(String param, String value)
Bug fixes:
Bug #957465: Missing a way to set stylesheet-level param-
variables
Bug #962290: selectNodes() improvements
Bug #1033472: Html output prints empty elements for non-empty
elements
Bug #1040717: Character entity for greater that in html output
style
Bug #1046003: Bug is parsing text nodes larger than 16K
Bug #1051671: 'xsl:namespace-alias' not supported
Bug #1052387: Disable-output-escaping doesn't flush while
printing
Bug #1053273: 'xsl:message' terminate attribute not supported
Bug #1058004: No access to media-type and encoding on xsl:output
Bug #1058008: xsl:version attribute not copied to result
Bug #1061159: Exclude-result-prefixes not supported
Bug #1067965: Bug in Non-validating parser while reading QNames
in DTD
This is the fifth production patch release for v2.
Oracle XML Team
http://technet.oracle.com
Oracle Technology Network
nullThe link has been fixed. You will go to the v2 download page
now. Sorry for the inconvience.
Oracle XML Team
http://technet.oracle.com
Oracle Technology Network
Renilton Oliveira (guest) wrote:
: I didn't find the file for version 2.0.0.0 as well.
: Renilton
: Andrei Filimonov (guest) wrote:
: : I tried to download XML Parser for Java v2 it seems that
only
: v
: : 1.0.1.4 is available. Could you please give an exact URL for
: v2
: : download?
: : Andrei Filimonov
: : Oracle XML Team wrote:
: : : The Oracle XML v2 parser is now available for download
here
: as
: : : an early beta release and is written in Java. It features
: an
: : : improved architecture over the Oracle XML v1 parser and
has
: : : shown better performance on small to large XML documents.
: It
: : : will also be able to format the XML document according to
a
: : : stylesheet, having integrated an XSLT processor.
: : : Version 2 of the XML Parser for Java, besides
incorporating
: an
: : : XSLT processor, has been re-architected from version 1.
This
: : has
: : : resulted in a number of changes to the class names
: especially
: : : those that support Namespaces. See v2changes.txt and
: the .diff
: : : difference files in the sample directory.
: : : Oracle XML Team
: : : http://technet.oracle.com
: : : Oracle Technology Network
null -
XML Parser for Java v2. Applying XSLT to DOM tree
I encountered pretty weird behavior of XML Parser for Java v2.
While applying XSLT to XML document created in memory using DOM
interface I couldn't access element attributes. For example,
given the XML document:
<root>
<Item ID="00001">Value of Item 00001</Item>
<Item ID="00002">Value of Item 00002</Item>
</root>
and XSLT:
<xsl:template match="/">
<HTML>
<HEAD>
<TITLE>XSLT Test</TITLE>
</HEAD>
<BODY>
<xsl:for-each select="/Error">
<H1>Error</H1><xsl:value-of select="."/>
</xsl:for-each>
<TABLE border="0" cellspacing="0" cellpadding="2">
<TBODY>
<xsl:for-each select="/root">
<TR>
<TH style="background-color:khaki">
<xsl:text>Attribute</xsl:text>
</TH>
<TH style="background-color:khaki">
<xsl:text>Value</xsl:text>
</TH>
</TR>
<xsl:for-each select="Item">
<TR>
<TD><xsl:value-of select="@ID"/></TD>
<TD><xsl:value-of select="."/></TD>
</TR>
</xsl:for-each>
</xsl:for-each>
</TBODY>
</TABLE>
</BODY>
</HTML>
</xsl:template>
If I build DOM tree by parsing XML file the resulting HTML
document after applying XSLT will display
Attribute Value
00001 Value of Item 00001
00002 Value of Item 00002
But if I build DOM tree using following code:
XMLDocument xDoc = new XMLDocument();
Element root = xDoc.createElement( "root" );
xDoc.appendChild( root );
Element elem = xDoc.createElement( "Item" );
elem.setAttribute( "ID", "00001" );
root.appendChild( elem ).
appendChild( xDoc.createTextNode( "Value of Item 00001" ) );
elem = xDoc.createElement( "Item" );
elem.setAttribute( "ID", "00002" );
root.appendChild( elem )
.appendChild( xDoc.createTextNode( "Value of Item 00002" ) );
the same XSLT will produce the following HTML output:
Attribute Value
Value of Item 00001
Value of Item 00002
So the value for the ID attribute is not displayed. At the same
time I can access this attribute using DOM interface. For
example, following code
NodeList nList = xDoc.getElementsByTagName( "Item" );
Element e;
for( int i = 0; i < nList.getLength(); i++ )
e = (Element)nList.item( i );
System.out.println( "ID: " + e.getAttribute( "ID" ) );
produces an output
ID: 00001
ID: 00002
Here is the code for applying XSLT to DOM tree:
DOMParser parser = new DOMParser();
parser.parse( new FileInputStream( "test.xsl" ) );
XMLDocument xsldoc = parser.getDocument();
XSLStylesheet xsl = new XSLStylesheet( xsldoc, createURL( "" ) );
XMLDocument out = new XMLDocument();
out.appendChild( new XSLProcessor().processXSL(xsl, xDoc) );
out.print( new FileOutputStream( "test.html" ) );
Andrei Filimonov
nullWe are not getting what you're getting on Solaris. See the
following:
Script started on Tue Jun 22 18:53:56 1999
Processing /view/test/vobs/oracore3/.ndeprodrc.csh
Processing /private/.nderc.csh
[test] > cat bruno.xml
<my_grandpa age="88">
<my_dad age="66">
<me age="44">
<my_son age="22">
</my_son>
</me>
</my_dad>
</my_grandpa>
[test] > cat bruno.xsl
<?xml version="1.0"?>
<!-- Identity transformation -->
<xsl:stylesheet xmlns:xsl="http://www.w3.org/XSL/Transform/1.0">
<xsl:template match="me">
<xsl:value-of select="my_son/@age"/>
<xsl:value-of select="@age"/>
<xsl:value-of select="../@age"/>
<xsl:value-of select="../../@age"/>
</xsl:template>
</xsl:stylesheet>
[test] > java XSLSample bruno.xsl bruno.xml
<root>
22446688
</root>
[test] > exit
script done on Tue Jun 22 18:54:22 1999
What platform are you on and does your stylesheet and xml doc
match ours?
Oracle XML Team
http://technet.oracle.com
Oracle Technology Network
Bruno Bontempi (guest) wrote:
: I had a similar problem in accessing element attributes from
an
: XSLT sheet.
: It seems like the processor correctly accesses element
attributes
: in the context node, but does not retrieve values of
attributes
: outside the context node.
: For example, for an XML document like:
: <my_grandpa age="88">
: <my_dad age="66">
: <me age="44">
: <my_son age="22">
: </my_son>
: </me>
: </my_dad>
: </my_grandpa>
: and an XSL stylesheet like:
: <xsl:template match="me">
: <xsl:value-of select="my_son/@age"/>
: <xsl:value-of select="@age"/>
: <xsl:value-of select="../@age"/>
: <xsl:value-of select="../../@age"/>
: </xsl:template>
: I expect an output like:
: 22446688
: but all I get is
: 44
: I am also using Jim Clark's XT, which is returning the
expected
: result.
: Thanks in advance for your help,
: Bruno.
: Andrei Filimonov (guest) wrote:
: : I encountered pretty weird behavior of XML Parser for Java
v2.
: : While applying XSLT to XML document created in memory using
DOM
: : interface I couldn't access element attributes. For example,
: : given the XML document:
: : <root>
: : <Item ID="00001">Value of Item 00001</Item>
: : <Item ID="00002">Value of Item 00002</Item>
: : </root>
: : and XSLT:
: : <xsl:template match="/">
: : <HTML>
: : <HEAD>
: : <TITLE>XSLT Test</TITLE>
: : </HEAD>
: : <BODY>
: : <xsl:for-each select="/Error">
: : <H1>Error</H1><xsl:value-of select="."/>
: : </xsl:for-each>
: : <TABLE border="0" cellspacing="0" cellpadding="2">
: : <TBODY>
: : <xsl:for-each select="/root">
: : <TR>
: : <TH style="background-color:khaki">
: : <xsl:text>Attribute</xsl:text>
: : </TH>
: : <TH style="background-color:khaki">
: : <xsl:text>Value</xsl:text>
: : </TH>
: : </TR>
: : <xsl:for-each select="Item">
: : <TR>
: : <TD><xsl:value-of select="@ID"/></TD>
: : <TD><xsl:value-of select="."/></TD>
: : </TR>
: : </xsl:for-each>
: : </xsl:for-each>
: : </TBODY>
: : </TABLE>
: : </BODY>
: : </HTML>
: : </xsl:template>
: : If I build DOM tree by parsing XML file the resulting HTML
: : document after applying XSLT will display
: : Attribute Value
: : 00001 Value of Item 00001
: : 00002 Value of Item 00002
: : But if I build DOM tree using following code:
: : XMLDocument xDoc = new XMLDocument();
: : Element root = xDoc.createElement( "root" );
: : xDoc.appendChild( root );
: : Element elem = xDoc.createElement( "Item" );
: : elem.setAttribute( "ID", "00001" );
: : root.appendChild( elem ).
: : appendChild( xDoc.createTextNode( "Value of Item
00001" )
: : elem = xDoc.createElement( "Item" );
: : elem.setAttribute( "ID", "00002" );
: : root.appendChild( elem )
: : .appendChild( xDoc.createTextNode( "Value of Item
00002" )
: : the same XSLT will produce the following HTML output:
: : Attribute Value
: : Value of Item 00001
: : Value of Item 00002
: : So the value for the ID attribute is not displayed. At the
same
: : time I can access this attribute using DOM interface. For
: : example, following code
: : NodeList nList = xDoc.getElementsByTagName( "Item" );
: : Element e;
: : for( int i = 0; i < nList.getLength(); i++ )
: : e = (Element)nList.item( i );
: : System.out.println( "ID: " + e.getAttribute( "ID" ) );
: : produces an output
: : ID: 00001
: : ID: 00002
: : Here is the code for applying XSLT to DOM tree:
: : DOMParser parser = new DOMParser();
: : parser.parse( new FileInputStream( "test.xsl" ) );
: : XMLDocument xsldoc = parser.getDocument();
: : XSLStylesheet xsl = new XSLStylesheet( xsldoc, createURL
: : XMLDocument out = new XMLDocument();
: : out.appendChild( new XSLProcessor().processXSL(xsl, xDoc) );
: : out.print( new FileOutputStream( "test.html" ) );
: : Andrei Filimonov
null -
XML Parser and Content-type/encoding problem
I've write a little and simple XML parser and a simple "trasformer" that recive an XML file and an XSL one and return HTML, here is the code:
public static String toHTML(Document doc, String xslSource){
ByteArrayOutputStream testo = new ByteArrayOutputStream();
try{
DOMSource source = new DOMSource(doc);
TransformerFactory tFactory = TransformerFactory.newInstance();
System.out.println("----> " + xslSource);
Transformer transformer = tFactory.newTransformer(new StreamSource(xslSource));
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
transformer.setOutputProperty(OutputKeys.METHOD, "html");
transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
transformer.transform(source, new StreamResult(testo));
}catch(Exception ioe){
System.out.println("2 XMLTool.toHTML " + new java.util.Date());
System.out.println(ioe);
return testo.toString();
}the problem is that I would like to put the HTML code its return into a JEditorPane; now I'm trying with this code:
JEditorPane jep1 = new JEditorPane();
jep1.setContentType("text/html");
jep1.setText(v);
// 'v' is the string returned by the code posted up (the XML/XSL transformer)but I can't see anything in my JEditorPane.
I think that the problem is this line of code that the transformer add automaticaly ad HTML code:
<META http-equiv="Content-Type" content="text/html; charset=UTF-8">Infact if I try to delete this line from the code I can see what I want but is'n good delete a line of code without understend where is the problem.
So, can anyone help me?good.
when u set ur output properties to html , transformer
searches for all entity references and converts accordingly.
if u r using xalan these files will be used for conversion of
Character entity references for markup-significant
output_html.properties
(this should be in templates package)
and HTMLEntities.res(should be in serialize package)
vasanth-ct -
Reading through a text file and then sorting
I'm having a lot of problems with this.
I have to read through a text file and I have to split the string up so that it is seperated into individual tokens. A line from the text file looks like this. addEvent(new Bell(tm + 9000)). I have to grab the addEvent, new, Bell, tm and 9000 and store it in a linkedlist. After reading through the whole text file I have to sort the the linked list based on the number. ie: 9000. Is there any way to do this? I currently break up the text file using a StringTokenizer object but then i am uncertain on how to add it to a linked list and then sort each line based on the number. Any help would be appreciated.
JoeSorry to bother you Ben but I just can't get my head wrapped around this. Here is exactly what I have to do:
After reading, Events must be stored in the EventSet according to the time they are to occur. Assume that no time number is more than 8 digits long. Restart() must be able to deal appropriately with any order of the Events. To accomplish this have Restart() save the relevant Event information in an LinkedList of strings and sort the Events by time before adding each event to EventSet. Use the <list>.add() to set up your linked list. This is shown in c09:List1.java and Collections.sort(<list>) shown in c09:ListSortSearch. Modify the Bell() to output a single "Bing!". When you read in a Bell event generate the appropriate number of Bell events as indicated by rings. These must be set to the correct times. This is an alternative to generating the new Bell events within Bell(). It will allow them be sorted into their correct time sequence. At this point the output of the program should be identical the original program.
After the intitial start, when restarting Restart() must provide to the user the option to recreate the EventSet from the linked list or read in a new file (supplied by the user). This must be achieved by prompting the user at the console. Please also allow the user the option to quit the program at this stage.
Main Program Code:
public class GreenhouseControls extends Controller
private boolean light = false;
private boolean water = false;
private String thermostat = "Day";
private boolean fans = false;
private class FansOn extends Event
public FansOn(long eventTime)
super(eventTime);
public void action()
// Put hardware control code here to
// physically turn on the Fans.
fans = true;
public String description()
return "Fan is On";
private class FansOff extends Event
public FansOff(long eventTime)
super(eventTime);
public void action()
// Put hardware control code here to
// physically turn off the Fans.
fans = false;
public String description()
return "Fans are Off";
private class LightOn extends Event
public LightOn(long eventTime)
super(eventTime);
public void action()
// Put hardware control code here to
// physically turn on the light.
light = true;
public String description()
return "Light is on";
private class LightOff extends Event
public LightOff(long eventTime)
super(eventTime);
public void action()
// Put hardware control code here to
// physically turn off the light.
light = false;
public String description()
return "Light is off";
private class WaterOn extends Event
public WaterOn(long eventTime)
super(eventTime);
public void action()
// Put hardware control code here
water = true;
public String description()
return "Greenhouse water is on";
private class WaterOff extends Event
public WaterOff(long eventTime)
super(eventTime);
public void action()
// Put hardware control code here
water = false;
public String description()
return "Greenhouse water is off";
private class ThermostatNight extends Event
public ThermostatNight(long eventTime)
super(eventTime);
public void action()
// Put hardware control code here
thermostat = "Night";
public String description()
return "Thermostat on night setting";
private class ThermostatDay extends Event
public ThermostatDay(long eventTime)
super(eventTime);
public void action()
// Put hardware control code here
thermostat = "Day";
public String description()
return "Thermostat on day setting";
// An example of an action() that inserts a
// new one of itself into the event list:
private int rings;
private class Bell extends Event
public Bell(long eventTime)
super(eventTime);
public void action()
// Ring every 2 seconds, 'rings' times:
System.out.println("Bing!");
if(--rings > 0)
addEvent(new Bell(System.currentTimeMillis() + 2000));
public String description()
return "Ring bell";
private class Restart extends Event
public Restart(long eventTime)
super(eventTime);
public void action()
long tm = System.currentTimeMillis();
// Instead of hard-wiring, you could parse
// configuration information from a text
// file here:
try
BufferedReader in = new BufferedReader(new FileReader("Event Config.txt"));
String str;
String[] l1 = new String[5];
LinkedList l2 = new LinkedList();
while((str = in.readLine()) != null )
StringTokenizer st = new StringTokenizer(str, "(+); ");
int nIndex = 0;
while (st.hasMoreTokens())
l1[nIndex] = st.nextToken();
//System.out.println(st.nextToken());
nIndex++;
l2.add(l1);
String[] s1 = (String[])l2.get(1);
for(int i = 0; i < s1.length; i++)
System.out.println(s1);
Comparator comp = s1[4];
Collections.sort(l2, comp);
in.close();
catch (IOException e)
rings = 5;
addEvent(new ThermostatNight(tm));
addEvent(new LightOn(tm + 1000));
addEvent(new LightOff(tm + 2000));
addEvent(new WaterOn(tm + 3000));
addEvent(new WaterOff(tm + 8000));
addEvent(new Bell(tm + 9000));
addEvent(new ThermostatDay(tm + 10000));
// Can even add a Restart object!
addEvent(new Restart(tm + 20000));*/
public String description() {
return "Restarting system";
public static void main(String[] args) {
GreenhouseControls gc =
new GreenhouseControls();
long tm = System.currentTimeMillis();
gc.addEvent(gc.new Restart(tm));
gc.run();
} ///:~
Examples File:
addEvent(new ThermostatNight(tm));
addEvent(new Bell(tm + 9000));
addEvent(new Restart(tm + 20000));
addEvent(new LightOn(tm + 1000));
addEvent(new WaterOn(tm + 3000));
rings = 5;
addEvent(new FansOn(tm + 4000));
addEvent(new LightOff(tm + 2000));
addEvent(new FansOff(tm + 6000));
addEvent(new WaterOff(tm + 8000));
addEvent(new WindowMalfunction(tm + 15000));
addEvent(new ThermostatDay(tm + 10000));
EventSet.java Code:
// This is just a way to hold Event objects.
class EventSet {
private Event[] events = new Event[100];
private int index = 0;
private int next = 0;
public void add(Event e) {
if(index >= events.length)
return; // (In real life, throw exception)
events[index++] = e;
public Event getNext() {
boolean looped = false;
int start = next;
do {
next = (next + 1) % events.length;
// See if it has looped to the beginning:
if(start == next) looped = true;
// If it loops past start, the list
// is empty:
if((next == (start + 1) % events.length)
&& looped)
return null;
} while(events[next] == null);
return events[next];
public void removeCurrent() {
events[next] = null;
public class Controller {
private EventSet es = new EventSet();
public void addEvent(Event c) { es.add(c); }
public void run() {
Event e;
while((e = es.getNext()) != null) {
if(e.ready()) {
e.action();
System.out.println(e.description());
es.removeCurrent();
} ///:~
Event.java Code
abstract public class Event {
private long evtTime;
public Event(long eventTime) {
evtTime = eventTime;
public boolean ready() {
return System.currentTimeMillis() >= evtTime;
abstract public void action();
abstract public String description();
} ///:~
Is this problem easier than I think it is? I just don't know what to add to the linkedList. A LinkedList within a linkedList? I find this problem pretty difficult. Any help is muchly appreciated.
Joe -
Hey Guys,
I have a requirement where i need to read and validate a fixed length text file having 90,000 records(lines). I need to parse each record and do some validations. Currently i am reading line by line using regular java.io.FILE/java.io.FileInputStream etc and parsing and validating the tokens. It takes around 15-20 minutes. Is there a better way to do it in java.
Any ideas??
Thanks
KMI wanted to know if there is something like lexical analysis / parsing in javaI believe thats what JavaCC is for, although I have never used it. Search the forum using "JavaCC" as the keyword or search google. I'm sure you'll find more information.
15-20 minutes sounds like a long time to parse and tokenize a string. I was playing with StringTokenizer and created a 200 character string that contained 10 tokens. I tokenized this string 200,000 times and it only took 4 seconds.
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