xml和string和xml和CDATA的用法

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xml和string和xml和CDATA的用法

StringToXml.java

import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.StringReader;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;

public class StringToXml {
public static void xmlTest(){
String xml="<?xml version='1.0' encoding='UTF-8' standalone='yes'?>" +
"<root>" +
"<head>" +
"<name>MyName</name>" +
"<age><![CDATA[11]]></age>" + //要注意 CDATA 格式的写法哦，不要缺少"<"符号
"</head>" +
"</root>";

//输出这个String类型的XML
System.out.println("输出这个String类型的XML:\n"+xml);

//将String的XML转化为XML类型并输出
Document document=null;
try {
document = DocumentHelper.parseText(xml);
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//为节点增加子节点
document.getRootElement().addElement("testNode_Add");
document.getRootElement().addElement("testNode_Add2");

//获取子节点并显示子节点的内容
System.out.println("\n获取子节点并显示子节点的内容:");
Element rt = document.getRootElement();
Node nameNode=rt.selectSingleNode("/root/head/name");
Node ageNode=rt.selectSingleNode("/root/head/age");
rt.selectSingleNode("/root/testNode_Add").setText("实验新增节点");

Element note2=(Element) rt.selectSingleNode("/root/testNode_Add2");
note2.addCDATA("实验CDATA节点内容");

Node testNode_AddNode=rt.selectSingleNode("/root/testNode_Add");
Node testNode_AddNode2=rt.selectSingleNode("/root/testNode_Add2");

System.out.println("nameNode="+nameNode.getText());
System.out.println("ageNode="+ageNode.getText());
System.out.println("testNode_AddNode="+testNode_AddNode.getText());
System.out.println("testNode_AddNode2="+testNode_AddNode2.getText());

//将XML转化String
String xml2=document.asXML();
System.out.println(xml2);

Document document2=null;
SAXReader reader = new SAXReader();

//将String转化为XML
StringReader stringReader = new StringReader(xml2.trim());
try {
document2 = reader.read(stringReader);

//XML转化为String
System.out.println("2"+document2.asXML());

} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

//将XML格式化显示在操作台-默认是utf-8
OutputFormat outPutFormat=OutputFormat.createPrettyPrint();
outPutFormat.setEncoding("GBK");//如果要更改字符格式

XMLWriter xmlWriter=new XMLWriter(new OutputStreamWriter(System.out),outPutFormat);
try {
System.out.println("\n");
xmlWriter.write(document);
xmlWriter.flush();
System.out.println("\nxmlWriter.close();之后的代码都不会再运行");
xmlWriter.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

public static void main(String [] args){
xmlTest();
}

}

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