首先導(dǎo)入dom4j.jar包,這個(gè)包里面有我們創(chuàng)建XML文件需要用到的類,比如常用的有:
Document:
import org.dom4j.Document;
Import org.dom4j.DocumentHelper;
DocumentHelper.createDocument(); 獲得文檔對(duì)象
addElement方法增加根節(jié)點(diǎn)
getRootElement方法獲得根節(jié)點(diǎn)
asXML方法將文檔對(duì)象包含的內(nèi)容轉(zhuǎn)換為字符
addComment方法在增加注釋
getPath方法獲得路徑,根節(jié)點(diǎn)為/
Element:
import org.dom4j.Elemet;
addElement方法增加子節(jié)點(diǎn)
addAttribute方法增加屬性
getName方法獲得節(jié)點(diǎn)名稱
asXML方法將文檔對(duì)象包含的內(nèi)容轉(zhuǎn)換為字符
addComment方法在增加注釋
getPath方法獲得路徑
addText方法增加節(jié)點(diǎn)值
setText方法設(shè)置節(jié)點(diǎn)值
addNamespace方法增加命名空間
attributeCount方法獲得屬性個(gè)數(shù)
attributeValue方法獲得屬性值
elementText方法指定元素的值
Attribute:
Import org.dom4j.Attribute;
getName方法獲得屬性名稱
getValue方法獲得屬性值
setValue方法設(shè)置屬性值
Node:
import org.dom4j.Node;
Document和Element中selectSingleNode方法獲得對(duì)象
setName方法設(shè)置節(jié)點(diǎn)名稱
getText方法獲得節(jié)點(diǎn)值
setText方法設(shè)置節(jié)點(diǎn)值
List,Iterator:
import java.util.List;
Document和Element中selectNodes方法獲得對(duì)象
import java.util.Iterator;
List中iterator方法,Iterator中hasNext方法和next方法來獲得節(jié)點(diǎn)或?qū)傩?br />
XMLWriter:
import org.dom4j.io.XMLWriter;
Writer方法與OutputStream(FileOutputStream),Writer(FileWriter)
write方法寫對(duì)象
close方法關(guān)閉寫對(duì)象
OutputFormat:
import org.dom4j.io.OutputFormat;
setEncoding方法設(shè)置字符集
createCompactFormat方法為緊湊格式,默認(rèn)
createPrettyFormat方法為縮進(jìn)格式
SAXReader:
import org.dom4j.io.SAXReader ;
read方法與File
下面,我們用這些類來實(shí)現(xiàn)一下創(chuàng)建XML文件的簡(jiǎn)單過程:
?1
package?Test;
?2
?3import?java.io.*;
?4import?org.dom4j.*;
?5import?org.dom4j.io.*;
?6
?7
public?class?xmlTest?
{
?8
????
?9
????public?void?writeXML(){
10????????Document?doc?=?org.dom4j.DocumentHelper.createDocument();
11????????//創(chuàng)建節(jié)點(diǎn)操作對(duì)象
12????????Element?rootElement?=?doc.addElement("student");
13????????//創(chuàng)建根節(jié)點(diǎn)對(duì)象rootElement,標(biāo)簽名為student
14????????
15????????rootElement.setText("hello");
16????????//對(duì)節(jié)點(diǎn)設(shè)置內(nèi)容,后面讀取XML文件的時(shí)候可以把他取出來
17????????rootElement.addAttribute("id","030511111");
18????????//設(shè)置節(jié)點(diǎn)屬性
19????????Element?name?=?rootElement.addElement("name");
20????????//添加子節(jié)點(diǎn)
21????????name.setText("xiaozhang");
22????????//設(shè)置子節(jié)點(diǎn)內(nèi)容
23????????Element?age?=?rootElement.addElement("age");
24????????age.setText("23");
25????????
26????????try?{
27????????????OutputFormat?fmt?=?new?OutputFormat();
28????????????//創(chuàng)建輸出格式對(duì)象
29????????????fmt.setEncoding("gb2312");
30????????????XMLWriter?writer?=?new?XMLWriter(fmt);
31????????????//以輸出格式為參數(shù),創(chuàng)建XML文件輸出對(duì)象
32????????????OutputStream?out?=?new?FileOutputStream("d:\\test.xml");
33????????????//創(chuàng)建輸出流..
34????????????writer.setOutputStream(out);
35????????????//設(shè)置輸出流
36????????????writer.write(doc);
37????????????//輸出doc對(duì)象,即形成XML文件
38????????}?catch?(Exception?e)?{
39
40????????????e.printStackTrace();
41
????????}
42????????
43????}
44????
45????public?void?readXML(){
46????????SAXReader?reader?=?new?SAXReader();
47????????//創(chuàng)建讀取對(duì)象
48????????Document?doc;
49????????try?{
50????????????doc?=?reader.read(new?File("d:\\test.xml"));
51????????????//從test.xml文件中取得節(jié)點(diǎn)操作對(duì)象
52????????????Element?name?=?doc.getRootElement();
53????????????//取得節(jié)點(diǎn)對(duì)象
54????????????System.out.println(name.getText());
55????????????//輸出節(jié)點(diǎn)內(nèi)容
56????????}?catch?(Exception?e)?{
57????????????e.printStackTrace();
58????????}
59????}
60????
61????public?static?void?main(String[]?args){
62????????xmlTest?s?=?new?xmlTest();
63????????s.writeXML();
64????????s.readXML();????
65????}
66
}
67 歡迎來訪！^.^!
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