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1
6
7 package org.jfox.ioc.util;
8
9 import java.io.BufferedInputStream  ;
10 import java.io.IOException ;
11 import java.io.InputStream ;
12 import java.net.URL ;
13 import java.util.ArrayList ;
14 import java.util.Arrays ;
15 import java.util.Iterator ;
16 import java.util.List ;
17 import javax.xml.parsers.DocumentBuilder ;
18 import javax.xml.parsers.DocumentBuilderFactory ;
19
20 import org.w3c.dom.Document ;
21 import org.w3c.dom.Element ;
22 import org.w3c.dom.Node ;
23 import org.w3c.dom.NodeList ;
24 import org.w3c.dom.Text ;
25
26
29
30 public class XMLUtils {
31
32 private XMLUtils() {
33
34 }
35
36 private final static DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
37
38 static {
39 dbf.setValidating(false);
40 dbf.setNamespaceAware(true);
41 dbf.setValidating(false);
42
43 };
44
45 static ThreadLocal dbcache = new ThreadLocal () {
46 protected Object initialValue() {
47 try {
48 DocumentBuilder db = dbf.newDocumentBuilder();
49 db.setEntityResolver(new DTDEntityResolver());
50 return db;
51 } catch (Exception ex) {
52 ex.printStackTrace();
53 return null;
54 }
55 }
56 };
57
58 public static DocumentBuilder getDocumentBuilder() {
59 return (DocumentBuilder ) dbcache.get();
60 }
61
68 public static Node getChildNodeOf(Node node, String tagName) {
69 for(Node temp = node.getFirstChild(); temp != null; temp = temp.getNextSibling())
70 if(temp.getNodeType() == Node.ELEMENT_NODE
71 && tagName.equals(temp.getNodeName())) {
72 return temp;
73 }
74 return null;
75 }
76
77 public static String getChildNodeValueOf(Node node, String tagName) {
78 if(tagName.equals(node.getNodeName())) {
79 return getValueOf(node);
80 }
81 for(Node temp = node.getFirstChild(); temp != null; temp = temp.getNextSibling()) {
82 if(temp.getNodeType() == Node.ELEMENT_NODE && tagName.equals(temp.getNodeName())) {
83 return getValueOf(temp);
84 }
85 }
86 return null;
87 }
88
89 public static final String getValueOf(Node node) {
90 if(node == null) {
91 return null;
92 }
93 else if(node instanceof Text ) {
94 return node.getNodeValue().trim();
95 }
96 else if(node instanceof Element ) {
97 ((Element ) node).normalize();
98 Node temp = node.getFirstChild();
99 if(temp != null && (temp instanceof Text ))
100 return temp.getNodeValue().trim();
101 else
102 return "";
103 }
104 else {
105 return node.getNodeValue().trim();
106 }
107 }
108
109 public static final String getAtrributeValueOf(Node node, String attribute) {
110 Node _node = node.getAttributes().getNamedItem(attribute);
111 return getValueOf(_node);
112 }
113
114 public static Iterator getElementsByTagName(Element element, String tag) {
115 ArrayList children = new ArrayList ();
116 if(element != null && tag != null) {
117 NodeList nodes = element.getElementsByTagName(tag);
118 for(int i = 0; i < nodes.getLength(); i++) {
119 Node child = nodes.item(i);
120 children.add((Element ) child);
122 }
123 }
124 return children.iterator();
125 }
126
127 public static Iterator getElementsByTagNames(Element element, String [] tags) {
128 List children = new ArrayList ();
129 if(element != null && tags != null) {
130 List tagList = Arrays.asList(tags);
131 NodeList nodes = element.getChildNodes();
132 for(int i = 0; i < nodes.getLength(); i++) {
133 Node child = nodes.item(i);
134 if(child.getNodeType() == Node.ELEMENT_NODE
135 && tagList.contains(((Element ) child).getTagName())) {
136 children.add((Element ) child);
137 }
139 }
140 }
141 return children.iterator();
142 }
143
144
150
151 public static Document getDocument(URL url) throws Exception {
152 InputStream is = null;
153 try {
154 is = new BufferedInputStream (url.openStream());
155 return getDocumentBuilder().parse(is);
156 }
157 finally {
158 if(is != null) {
159 try {
160 is.close();
161 }
162 catch(IOException e) {
163
164 }
165 }
166 }
167 }
168
169 public static void main(String [] args) {
170
171 }
172 }
173
174 |
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