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XmlUtils.java
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155 lines (143 loc) · 5.46 KB
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package com.xml;
import org.dom4j.*;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;
import java.io.*;
import java.util.Iterator;
import java.util.List;
/**
* Created by lenovo on 二月
*/
public class XmlUtils {
/**
* 字符串写入xml文件
* @param text 文本内容，类似 String text="<csdn><java>Java班</java><net>Net班</net></csdn>";
* @throws Exception
*/
public static void stringToXml(String text,String fileName) throws Exception {
Document document= DocumentHelper.parseText(text);
Element element=document.getRootElement();
System.out.println(element.getName());
writeToXml(document,fileName);
}
/**
* 把document对象写入xml文件中
* @param document
*/
public static void writeToXml(Document document,String fileName) throws Exception {
// 紧凑的格式
// OutputFormat format=OutputFormat.createCompactFormat();
// 排版缩进的格式
OutputFormat format=OutputFormat.createPrettyPrint();
format.setEncoding("UTF-8");
//创建XmlWriter对象，指定文件及编码
XMLWriter xmlWriter=new XMLWriter(new OutputStreamWriter(new FileOutputStream(new File(fileName)),"UTF-8"),format);
xmlWriter.write(document);
//刷新流
xmlWriter.flush();
xmlWriter.close();
}
/**
* 创建Document对象，并往对象中添加节点元素，转存为xml文件
* @param fileName
* @throws Exception
*/
public static void createDocumentToXml(String fileName) throws Exception{
Document document=DocumentHelper.createDocument();
Element root=document.addElement("csdn");
Element java=root.addElement("java");
java.setText("java班");
Element ios=root.addElement("ios");
ios.setText("ios班");
writeToXml(document,fileName);
}
/**
* 添加属性和数据到xml文件中
* @param fileName
*/
public static void addAttributeToXml(String fileName) throws Exception {
// 创建saxReader对象
SAXReader reader = new SAXReader();
// 通过read方法读取一个文件 转换成Document对象
Document document = reader.read(new File(fileName));
//获取根节点元素对象
Element root = document.getRootElement();
Element element=root.element("红楼梦");
Attribute attribute=element.attribute("id");
element.remove(attribute);
//添加新的元素
element.addAttribute("name","作者");
Element newElement=element.addElement("朝代");
newElement.setText("清朝");
//获得节点对象
Element author=element.element("作者");
element.addCDATA("红楼梦，见证一个大家族的兴衰");
writeToXml(document,fileName);
}
/**
* 遍历xml文件的节点
* @param fileName
* @throws Exception
*/
public static void getElementText(String fileName) throws Exception{
SAXReader saxReader=new SAXReader();
//获取文件，转换成Document对象
Document document=saxReader.read( new File(fileName));
Element root=document.getRootElement();
//遍历所有元素的节点
listNodes(root);
}
/**
* 遍历当前节点元素下方的所有(元素)的子节点
* @param node
*/
public static void listNodes(Element node) {
System.out.println("当前节点的名称："+node.getName());
List<Attribute> attributeList=node.attributes();
System.out.println("节点的属性：");
for(Attribute attribute : attributeList) {
System.out.println(attribute.getText()+"---"+attribute.getName()
+"----"+attribute.getValue());
}
if( !("" ).equals( node.getTextTrim())){
System.out.println("文本内容:"+node.getText());
}
System.out.println("-------------------------");
Iterator<Element> iterator=node.elementIterator();
while (iterator.hasNext()) {
Element element=iterator.next();
listNodes(element);
}
}
/**
* 获取xml文件的内容
* @param fileName 文件名，类似 String fileName1="E:\\test.xml";
* @param names 标签组成的字符数组.比如 String[] names=new String[]{"西游记","作者"};
* @throws Exception
*/
public static void getXmlContent(String fileName,String[] names) throws Exception {
SAXReader saxReader=new SAXReader();
//获取文件，转换成Document对象
Document document=saxReader.read( new File(fileName));
//获取xml内容
String docXmlText=document.asXML();
System.out.println("xml内容如下："+docXmlText);
System.out.println("-----------------------------");
//获取根元素
Element e=document.getRootElement();
//遍历xml文档
for(String name : names) {
if ( e!=null && e.element(name)!=null) {
e=e.element(name);
String elementStr=e.asXML();
System.out.println(elementStr);
System.out.println("-----------------------------");
}
}
if(e!=null) {
String text=e.getText();
System.out.println("元素内容如下:\n"+text);
}
}
}