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java DOM 操作xml
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内容图文
1 代码如下：
1
package
dom.pasing;
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3
import
java.io.IOException;
4
import
java.io.StringWriter;
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6
import
javax.xml.parsers.DocumentBuilder;
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import
javax.xml.parsers.DocumentBuilderFactory;
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import
javax.xml.parsers.ParserConfigurationException;
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import
javax.xml.transform.OutputKeys;
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import
javax.xml.transform.Transformer;
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import
javax.xml.transform.TransformerException;
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import
javax.xml.transform.TransformerFactory;
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import
javax.xml.transform.dom.DOMSource;
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import
javax.xml.transform.stream.StreamResult;
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import
org.apache.xml.serialize.OutputFormat;
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import
org.apache.xml.serialize.XMLSerializer;
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import
org.w3c.dom.Attr;
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import
org.w3c.dom.Document;
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import
org.w3c.dom.Element;
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import
org.w3c.dom.Node;
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import
org.w3c.dom.NodeList;
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import
org.w3c.dom.Text;
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public
class
DOMTest {
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/**
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*
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*
@return
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*/
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public
static
Document createDocument() {
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35 Document document = null;
36 37try {
38 DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
39 DocumentBuilder builder = builderFactory.newDocumentBuilder();
40 document = builder.newDocument();
41 Element root = document.createElement("students");
42 document.appendChild(root);
43 44/** 45 * <students>
46 * <student sn="01">
47 * <name>张三</name>
48 * <age>19</age>
49 * </student>
50 * </students>
51*/ 52 Element stuEle = document.createElement("student");
53 54 Attr attr = document.createAttribute("sn");
55 attr.setValue("01");
56 stuEle.setAttributeNode(attr);
57 58 Element nameElem = document.createElement("name");
59 Text txtName = document.createTextNode("张三");
60 nameElem.appendChild(txtName);
61 stuEle.appendChild(nameElem);
62 63 Element ageElem = document.createElement("age");
64 Text txtAge = document.createTextNode("19");
65 ageElem.appendChild(txtAge);
66 stuEle.appendChild(ageElem);
67 document.getDocumentElement().appendChild(stuEle); //在文档根元素节点studnets下，添加一个student元素节点 68 69/** 70 * 创建节点
71 * <student>
72 * <name>李四</name>
73 * <age>24</age>
74 * </student>
75*/ 76 Element stuEle2 = document.createElement("student");
77 78 Attr attr2 = document.createAttribute("sn");
79 attr2.setValue("02");
80 stuEle2.setAttributeNode(attr2);
81 82 Element nameEle2 = document.createElement("name");
83 Text txtName2 = document.createTextNode("李四");
84 nameEle2.appendChild(txtName2);
85 stuEle2.appendChild(nameEle2);
86 87 Element ageEle2 = document.createElement("age");
88 Text txtAge2 = document.createTextNode("24");
89 ageEle2.appendChild(txtAge2);
90 stuEle2.appendChild(ageEle2);
91 document.getDocumentElement().appendChild(stuEle2); //在文档根元素节点studnets下，添加一个student元素节点 92 } catch (ParserConfigurationException e) {
93 e.printStackTrace();
94 }
95 96return document;
97 }
98 99publicstaticvoid alterDocument(Document document) {
100 NodeList nodeList = document.getElementsByTagName("student");
101 Node node = nodeList.item(0);
102 node.getParentNode().removeChild(node); //移除第1个student元素节点103 }
104105106107/**108 * 转换DOM为String
109 * @param document
110 * @return111 * @throws TransformerException
112*/113publicstatic String documentToStr(Document document) {
114115 String result = null;
116117try {
118 DOMSource source = new DOMSource(document);
119 StringWriter stringWriter = new StringWriter();
120 StreamResult streamResult = new StreamResult(stringWriter);
121122 TransformerFactory transformerFactory = TransformerFactory.newInstance();
123 Transformer transformer = transformerFactory.newTransformer();
124 transformer.setOutputProperty(OutputKeys.INDENT, "yes"); //默认的缩进量长度为0125 transformer.setOutputProperty(OutputKeys.ENCODING, "utf-8");
126 transformer.transform(source, streamResult);
127128 result = stringWriter.toString();
129 } catch (TransformerException e) {
130 e.printStackTrace();
131 }
132return result;
133 }
134135/**136 *
137 * @param document
138 * @return139*/140publicstatic String documentToIndentStr(Document document) {
141142 String result = null;
143144try {
145146 StringWriter stringWriter = new StringWriter();
147148 OutputFormat format = new OutputFormat(document);
149 format.setLineWidth(100);
150 format.setIndenting(true);
151 format.setIndent(4);
152153 XMLSerializer serializer = new XMLSerializer(stringWriter, format);
154 serializer.serialize(document);
155156 result = stringWriter.toString();
157 } catch (IOException e) {
158// TODO Auto-generated catch block159 e.printStackTrace();
160 }
161return result;
162 }
163164publicstaticvoid main(String[] args) {
165166 String rslt = null;
167168 Document document = createDocument();
169170 rslt = documentToIndentStr(document);
171172 System.out.println(rslt);
173 }
174 }
输出结果：
<?xml version="1.0" encoding="UTF-8"?>
<students>
<student sn="01">
<name>张三</name>
<age>19</age>
</student>
<student sn="02">
<name>李四</name>
<age>24</age>
</student>
</students>
原文：http://www.cnblogs.com/asnjudy/p/4572628.html
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