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package com.elink.util;
/*
* <p>company: 凌科软件 www.elingke.com </p>
* @author liubaojun
* @version 1.0
* created on 2004-11-29
* 来源于 elinkbsp 部分源代码
*/
import java.io.*;
import java.util.*;
import javax.xml.parsers.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;
import org.w3c.dom.*;
import org.xml.sax.*;
public class xmlutil
{
public static synchronized document newdocument()
{
document doc = null;
try
{
documentbuilder db = documentbuilderfactory.newinstance().
newdocumentbuilder();
doc = db.newdocument();
}
catch (exception e)
{
logutil.logexception( e );
}
return doc;
}
public static synchronized element createrootelement()
{
element rootelement = null;
try
{
documentbuilder db = documentbuilderfactory.newinstance().
newdocumentbuilder();
document doc = db.newdocument();
rootelement = doc.getdocumentelement();
}
catch (exception e)
{
e.printstacktrace();
}
return rootelement;
}
public static synchronized element getrootelement(string filename)
{
if (filename == null || filename.length() == 0)
{
return null;
}
try
{
element rootelement = null;
fileinputstream fis = new fileinputstream(filename);
rootelement = getrootelement(fis);
fis.close();
return rootelement;
}
catch (exception e)
{
return null;
}
}
public static synchronized element getrootelement(inputstream is)
{
if (is == null)
{
return null;
}
element rootelement = null;
try
{
documentbuilder db = documentbuilderfactory.newinstance().
newdocumentbuilder();
document doc = db.parse(is);
rootelement = doc.getdocumentelement();
}
catch (exception e)
{
e.printstacktrace();
}
return rootelement;
}
public static synchronized element getrootelement(inputsource is)
{
if (is == null)
{
return null;
}
element rootelement = null;
try
{
documentbuilder db = documentbuilderfactory.newinstance().
newdocumentbuilder();
document doc = db.parse(is);
rootelement = doc.getdocumentelement();
}
catch (exception e)
{
e.printstacktrace();
}
return rootelement;
}
public static synchronized element[] getchildelements(element element)
{
if (element == null)
{
return null;
}
vector childs = new vector();
for (node node = element.getfirstchild(); node != null;
node = node.getnextsibling())
{
if (node instanceof element)
{
childs.add( (element)node);
}
}
element[] elmt = new element[childs.size()];
childs.toarray(elmt);
return elmt;
}
public static synchronized element[] getchildelements(element element,
string childname)
{
if (element == null || childname == null || childname.length() == 0)
{
return null;
}
vector childs = new vector();
for (node node = element.getfirstchild(); node != null;
node = node.getnextsibling())
{
if (node instanceof element)
{
if (node.getnodename().equals(childname))
{
childs.add( (element)node);
}
}
}
element[] elmt = new element[childs.size()];
childs.toarray(elmt);
return elmt;
}
public static synchronized node[] getchildnodes(node node)
{
if (node == null)
{
return null;
}
vector childs = new vector();
for (node n = node.getfirstchild(); n != null;
n = n.getnextsibling())
{
childs.add( (element)n);
}
node[] childnodes = new element[childs.size()];
childs.toarray(childnodes);
return childnodes;
}
public static synchronized element getchildelement(element element,
string childname)
{
if (element == null || childname == null || childname.length() == 0)
{
return null;
}
element childs = null;
for (node node = element.getfirstchild(); node != null;
node = node.getnextsibling())
{
if (node instanceof element)
{
if (node.getnodename().equals(childname))
{
childs = (element)node;
break;
}
}
}
return childs;
}
public static synchronized element getchildelement(element element)
{
if (element == null)
{
return null;
}
element childs = null;
for (node node = element.getfirstchild(); node != null;
node = node.getnextsibling())
{
if (node instanceof element)
{
childs = (element)node;
break;
}
}
return childs;
}
public static synchronized string[] getelenentvalues(element element)
{
if (element == null)
{
return null;
}
vector childs = new vector();
for (node node = element.getfirstchild(); node != null;
node = node.getnextsibling())
{
if (node instanceof text)
{
childs.add(node.getnodevalue());
}
}
string[] values = new string[childs.size()];
childs.toarray(values);
return values;
}
public static synchronized string getelenentvalue(element element)
{
if (element == null)
{
return null;
}
string retnstr = null;
for (node node = element.getfirstchild(); node != null;
node = node.getnextsibling())
{
if (node instanceof text)
{
string str = node.getnodevalue();
if (str == null || str.length() == 0
|| str.trim().length() == 0)
{
continue;
}
else
{
retnstr = str;
break;
}
}
}
return retnstr;
}
public static synchronized element findelementbyname(element e, string name)
{
if (e == null || name == null || name.length() == 0)
{
return null;
}
string nodename = null;
element[] childs = getchildelements(e);
for (int i = 0; i < childs.length; i++)
{
nodename = childs[i].getnodename();
if (name.equals(nodename))
{
return childs[i];
}
}
for (int i = 0; i < childs.length; i++)
{
element retn = findelementbyname(childs[i], name);
if (retn != null)
{
return retn;
}
}
return null;
}
public static synchronized element findelementbyattr(element e, string attrname,
string attrval)
{
return findelementbyattr( e, attrname, attrval, true );
}
public static synchronized element findelementbyattr(element e, string attrname,
string attrval, boolean dept)
{
if (e == null || attrname == null || attrname.length() == 0
|| attrval == null || attrval.length() == 0)
{
return null;
}
string tmpvalue = null;
element[] childs = getchildelements(e);
for (int i = 0; i < childs.length; i++)
{
tmpvalue = childs[i].getattribute(attrname);
if (attrval.equals(tmpvalue))
{
return childs[i];
}
}
if( dept )
{
for (int i = 0; i < childs.length; i++)
{
element retn = findelementbyattr(childs[i], attrname, attrval);
if (retn != null)
{
return retn;
}
}
}
return null;
}
public static synchronized string formatxml(element e)
{
return formatxml(e, 0);
}
/**
* 格式化xml输出串.
*/
public static synchronized string formatxml(element e, int indent)
{
indent++;
for (node n = e.getfirstchild(); n != null; n = n.getnextsibling())
{
appendindent(e, n, indent);
if (!n.getnodename().equals("#text"))
{
formatxml( (element)n, indent);
}
}
indent–;
appendindent(e, indent);
return e.tostring();
}
/**
* 在指定的节点前插入格式表示.
*/
private static synchronized void appendindent(element e, node pos, int indent)
{
document doc = e.getownerdocument();
if (indent == 0)
{
e.insertbefore(doc.createtextnode("\n"), pos);
}
for (int i = 0; i < indent; i++)
{
if (i == 0)
{
e.insertbefore(doc.createtextnode("\n\t"), pos);
}
else
{
e.insertbefore(doc.createtextnode("\t"), pos);
}
}
}
/**
* 追加格式表示.
*/
private static synchronized void appendindent(element e, int indent)
{
document doc = e.getownerdocument();
if (indent == 0)
{
e.appendchild(doc.createtextnode("\n"));
}
for (int i = 0; i < indent; i++)
{
if (i == 0)
{
e.appendchild(doc.createtextnode("\n\t"));
}
else
{
e.appendchild(doc.createtextnode("\t"));
}
}
}
public static synchronized void setattribute(element e, string name, string value)
{
if (e == null || name == null || name.length() == 0 || value == null
|| value.length() == 0)
return;
else
e.setattribute( name, value );
}
public static synchronized string getattribute(element e, string name)
{
return getattribute( e, name, null );
}
public static synchronized string getattribute(element e, string name, string defval)
{
if( e == null || name == null || name.length()== 0 )
return defval;
else
return e.getattribute(name);
}
public void transformerwrite( element doc, string filename ) throws exception
{
domsource doms = new domsource( doc );
file f = new file( filename );
streamresult sr = new streamresult( f );
transformerwrite( doms, sr );
}
public void transformerwrite( element doc, file file ) throws exception
{
domsource doms = new domsource( doc );
streamresult sr = new streamresult( file );
transformerwrite( doms, sr );
}
public void transformerwrite( element doc, outputstream outstream ) throws exception
{
domsource doms = new domsource( doc );
streamresult sr = new streamresult( outstream );
transformerwrite( doms, sr );
}
public void transformerwrite( element doc, writer outwriter ) throws exception
{
domsource doms = new domsource( doc );
streamresult sr = new streamresult( outwriter );
transformerwrite( doms, sr );
}
public void transformerwrite( domsource doms, streamresult sr ) throws exception
{
transformerfactory tf = transformerfactory.newinstance();
transformer t = tf.newtransformer();
t.setoutputproperty( outputkeys.encoding, "gbk" );
t.transform( doms, sr );
}
}
