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[轉(zhuǎn)]Java與XML（二）用java編寫(xiě)xml的讀寫(xiě)程序

這是讀取xml文件的java程序，我調(diào)試好的。采用的是dom方式讀取xml文件到Vector中。

package ?src;
?2

import ?java.io. * ;
?3

import ?java.util.Vector;
?4

import ?javax.xml.parsers. * ;
?5

import ?org.w3c.dom. * ;
?6

public ? class ?readxml? {
?7

static ?Document?document;
?8

private ? boolean ?validating;
?9

public ?readxml()? {
10

}
11

public ?Vector?toRead(String?filename)? {
12

Vector?title = new ?Vector();
13

Vector?content = new ?Vector();
14

String?myStr = new ?String();
15

try ? {
16

DocumentBuilderFactory?factory? = ?DocumentBuilderFactory.newInstance();
17

factory.setValidating(validating);
18

DocumentBuilder?builder? = ?factory.newDocumentBuilder();
19

document? = ?builder.parse( new ?File(filename));
20

document.getDocumentElement().normalize();
21

Node?node? = ?document.getFirstChild();
22

NodeList?list? = ?node.getChildNodes();
23

for ?( int ?i? = ? 0 ;?i? < ?list.getLength();?i ++ )? {
24

Node?nodeitm? = ?list.item(i);
25

if ?(nodeitm.getNodeName().equals( " Title " ))? {
26

myStr = nodeitm.getFirstChild().getNodeValue();
27

title.addElement(myStr); // getFirstChild()
28

}
29

if ?(nodeitm.getNodeName().equals( " Content " ))? {
30

myStr = nodeitm.getFirstChild().getNodeValue();
31

content.addElement(myStr);
32

}
33

}
34

} ? catch ?(Exception?exp)? {
35

exp.printStackTrace();
36

return ? null ;
37

}
38

Vector?all = new ?Vector();
39

all.add(title);
40

all.add(content);?
41

return ?all;
42

}
43

public ? static ? void ?main(String[]?args)? {
45

Vector?A;
46

readxml?my? = ? new ?readxml();
47

A? = ?my.toRead( " file.xml " );
48

for ?( int ?i? = ? 0 ;?i? < ?A.size();?i ++ )? {
49

System.out.println(A.elementAt(i));
50

}
51

}
52

}
53

這是將xml寫(xiě)入文件。其中，transformer.setOutputProperty(OutputKeys.ENCODING,"GB2312")關(guān)系到編碼問(wèn)題，非常重要。

import ?org.w3c.dom. * ;
?2

import ?javax.xml.parsers. * ;
?3

import ?javax.xml.transform. * ;
?4

import ?javax.xml.transform.dom.DOMSource;
?5

import ?javax.xml.transform.stream.StreamResult;
?6

import ?java.io. * ;
?7

public ? class ?writexml? {
?8

private ?Document?document;
?9

private ?String?filename;
10

public ?writexml(String?name)? throws ?ParserConfigurationException {
12

filename = name;
13

DocumentBuilderFactory?factory = DocumentBuilderFactory.newInstance();
14

DocumentBuilder?builder = factory.newDocumentBuilder();
15

document = builder.newDocument();
16

}
17

public ? void ?toWrite(String?mytitle,String?mycontent) {
18

Element?root = document.createElement( " WorkShop " );
19

document.appendChild(root);
20

Element?title = document.createElement( " Title " );
21

title.appendChild(document.createTextNode(mytitle));
22

root.appendChild(title);
23

Element?content = document.createElement( " Content " );
24

content.appendChild(document.createTextNode(mycontent));
25

root.appendChild(content);
26

}
27

public ? void ?toSave() {
28

try {
29

TransformerFactory?tf = TransformerFactory.newInstance();
30

Transformer?transformer = tf.newTransformer();
31

DOMSource?source = new ?DOMSource(document);
32

transformer.setOutputProperty(OutputKeys.ENCODING, " GB2312 " );
33

transformer.setOutputProperty(OutputKeys.INDENT, " yes " );
34

PrintWriter?pw = new ?PrintWriter( new ?FileOutputStream(filename));
35

StreamResult?result = new ?StreamResult(pw);
36

transformer.transform(source,result);
37

}
38

catch (TransformerException?mye) {
39

mye.printStackTrace();
40

}
41

catch (IOException?exp) {
42

exp.printStackTrace();
43

}
44

}
45

public ? static ? void ?main(String?args[]) {
46

try {
47

writexml?myxml = new ?writexml( " file.xml " );
48

myxml.toWrite( " 中文題目 " , " 中文內(nèi)容 " );
49

myxml.toSave();
50

System.out.print( " Your?writing?is?successful. " );
51

}
52

catch (ParserConfigurationException?exp) {
53

exp.printStackTrace();
54

System.out.print( " Your?writing?is?failed. " );
55

} ?
56

}
57

}
58

posted on 2006-07-10 18:16 Merlin 閱讀(199) 評(píng)論(0) 編輯收藏引用所屬分類(lèi): java基礎(chǔ)篇

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