码迷,mamicode.com
首页 > 编程语言 > 详细

Java 操纵XML之修改XML文件

时间:2017-12-07 22:41:05      阅读:323      评论:0      收藏:0      [点我收藏+]

标签:parser   bsp   request   set   分享图片   student   seve   map   sso   

Java 操纵XML之修改XML文件

一、JAVA DOM PARSER

DOM interfaces
  The DOM defines several Java interfaces. Here are the most common interfaces:
    Node - The base datatype of the DOM.
    Element - The vast majority of the objects you‘ll deal with are Elements.
    Attr Represents an attribute of an element.
    Text The actual content of an Element or Attr.
    Document Represents the entire XML document. A Document object is often referred to as a DOM tree.
Common DOM methods
  When you are working with the DOM, there are several methods you‘ll use often:
    Document.getDocumentElement() - Returns the root element of the document.
    Node.getFirstChild() - Returns the first child of a given Node.
    Node.getLastChild() - Returns the last child of a given Node.
    Node.getNextSibling() - These methods return the next sibling of a given Node.
    Node.getPreviousSibling() - These methods return the previous sibling of a given Node.
    Node.getAttribute(attrName) - For a given Node, returns the attribute with the requested name.

二、源代码:ModifyXmlFile.java

 1 package cn.com.zfc.lesson26.xml;
 2 
 3 import java.io.File;
 4 
 5 import javax.xml.parsers.DocumentBuilder;
 6 import javax.xml.parsers.DocumentBuilderFactory;
 7 import javax.xml.transform.Transformer;
 8 import javax.xml.transform.TransformerFactory;
 9 import javax.xml.transform.dom.DOMSource;
10 import javax.xml.transform.stream.StreamResult;
11 
12 import org.w3c.dom.Document;
13 import org.w3c.dom.Element;
14 import org.w3c.dom.NamedNodeMap;
15 import org.w3c.dom.Node;
16 
17 /**
18  * 使用JAVA DOM PARSER:修改 XML 文件
19  * 
20  * @author zfc
21  * @date 2017年12月7日 下午8:31:55
22  */
23 public class ModifyXmlFile {
24     public static void main(String[] args) {
25         try {
26             String filePath = "I:\\code_workspace\\JavaSE_workspace\\JavaSE\\src\\cn\\com\\zfc\\lesson26\\xml\\ModifyXmlFile.xml";
27             // 1、创建 File 对象,映射 XML 文件
28             File file = new File(filePath);
29             // 2、创建 DocumentBuilderFactory 对象,用来创建 DocumentBuilder 对象
30             DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
31             // 3、创建 DocumentBuilder 对象,用来将 XML 文件 转化为 Document 对象
32             DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
33             // 4、创建 Document 对象,解析 XML 文件
34             Document document = documentBuilder.parse(file);
35             // 修改第一个 student
36             // 5、获取第一个 student 结点
37             Node student = document.getElementsByTagName("student").item(0);
38             // 获取结点 student 结点的所有属性
39             NamedNodeMap namedNodeMap = student.getAttributes();
40             // 获取界定 student 的 属性 id
41             Node id = namedNodeMap.getNamedItem("id");
42             // 给属性 id 重新设置值
43             id.setTextContent("student11");
44             // 6、获取根结点 students 的第一个直接子结点 student
45             student = document.getElementsByTagName("student").item(0);
46             Element studentElement = (Element) student;
47             // 7、获取结点 student 的直接子结点 name、sex
48             Node name = studentElement.getElementsByTagName("name").item(0);
49             Node sex = studentElement.getElementsByTagName("sex").item(0);
50             Element nameElement = (Element) name;
51             Element sexElement = (Element) sex;
52             // 8、给节点进行设置值
53             nameElement.setTextContent("TomTom");
54             sexElement.setTextContent("FemaleFemale");
55             // 9、创建 TransformerFactory 对象
56             TransformerFactory transformerFactory = TransformerFactory.newInstance();
57             // 10、创建 Transformer 对象
58             Transformer transformer = transformerFactory.newTransformer();
59             // 11、创建 DOMSource 对象
60             DOMSource domSource = new DOMSource(document);
61             // 12、创建 StreamResult 对象
62             StreamResult reStreamResult = new StreamResult(file);
63             transformer.transform(domSource, reStreamResult);
64 
65             // 输出测试结果
66             StreamResult consoleResult = new StreamResult(System.out);
67             transformer.transform(domSource, consoleResult);
68 
69         } catch (Exception e) {
70             e.printStackTrace();
71         }
72     }
73 }

ModifyXmlFile.xml

 1 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 2 <students>
 3     <student id="student1">
 4         <name>Tom</name>
 5         <sex>Female</sex>
 6     </student>
 7     <student id="student2">
 8         <name>Lucy</name>
 9         <sex>Male</sex>
10     </student>
11 </students>

三、运行效果:

 1 <?xml version="1.0" encoding="UTF-8" standalone="no"?><students>
 2     <student id="student11">
 3         <name>TomTom</name>
 4         <sex>FemaleFemale</sex>
 5     </student>
 6     <student id="student2">
 7         <name>Lucy</name>
 8         <sex>Male</sex>
 9     </student>
10 </students>

技术分享图片

Java 操纵XML之修改XML文件

标签:parser   bsp   request   set   分享图片   student   seve   map   sso   

原文地址:http://www.cnblogs.com/zfc-java/p/8001212.html

(0)
(0)
   
举报
评论 一句话评论(0
登录后才能评论!
© 2014 mamicode.com 版权所有  联系我们:gaon5@hotmail.com
迷上了代码!