问答详情
源自：2-2 创建 XML 文件

换行但是没有缩进。。。这个要怎么办？ 如何在已有的xml文件中，再加一个book子节点？

<?xml version="1.0" encoding="UTF-8"?>
<bookstore>
	<book id="1">
		<name>冰与火之歌</name>
		<author>乔治马丁</author>
		<language>English</language>
		<price>109.9</price>
	</book>
	<book  id="2">
		<name>安徒生童话</name>
		<author>安徒生</author>
		<language>Chinese</language>
		<price>59.0</price>
	</book>
</bookstore>



/* 想在上面的xml内容中在加入一个book子节点，我应该怎么做？ */


提问者：文人骚客2077 2014-12-27 16:43

个回答

  • JessicaJiang
    2015-02-27 12:36:26

    至于通过代码增加结点，可以参照：http://www.imooc.com/qadetail/66706

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  • JessicaJiang
    2015-02-27 12:34:15

    @da丶萌萌哒

    http://img.mukewang.com/54eff32b00011f9804080059.jpg

    如果是DOM4J的话，可以采用这种PrettyPrint

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  • JessicaJiang
    2014-12-31 09:58:31

    @da丶萌萌哒

    <?xml version="1.0" encoding="UTF-8"?>

    <bookstore>

        <book id="1">

            <name>冰与火之歌</name>

            <author>乔治马丁</author>

            <language>English</language>

            <price>109.9</price>

        </book>

        <book  id="2">

            <name>安徒生童话</name>

            <author>安徒生</author>

            <language>Chinese</language>

            <price>59.0</price>

        </book>

        <book  id="3">

            <name>第三本书</name>

            <author>某某某</author>

            <language>Chinese</language>

            <price>444</price>

        </book>

    </bookstore>

    这样就增加了一本书。

    换行敲回车键，缩进的话敲空格或者tab键都可以哦~！


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  • IOldCat
    2016-04-23 01:17:49

    package com.imooc.domtest.test;

import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Scanner;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Result;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;
import org.w3c.dom.Element;

public class CreateXML {

	public DocumentBuilder getDocumentBuilder(){
		// 创建一个DocumentBuilderFactory的对象
		DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
		// 创建DocumentBuilder对象
		DocumentBuilder db =null;
		try {
			db = dbf.newDocumentBuilder();
		} catch (ParserConfigurationException e) {
			e.printStackTrace();
		}
		return db;
	}
	
	/**
	 * 生成xml
	 */
	public void createXML(){
		Scanner in =new Scanner(System.in);
		DocumentBuilder db = getDocumentBuilder();
		Document document = db.newDocument();
		document.setXmlStandalone(true);
		Element bookstore = document.createElement("bookStore");
		System.out.print("创建多少本书？：");
		//向bookstore根节点中添加子节点book
		int n=in.nextInt();
		for(int i=0;i<n;i++){
			ArrayList<Element> elements=new ArrayList<Element>();
			Element book = document.createElement("book");
			Element name = document.createElement("name");
			Element price = document.createElement("price");
			Element language = document.createElement("language");
			Element year = document.createElement("year");
			elements.add(name);
			elements.add(price);
			elements.add(language);
			elements.add(year);
	//		name.setNodeValue("小王子");
			System.out.println("---------第"+(i+1)+"本书--------");
			System.out.println("input the "+(i+1)+" book id");
			String id=in.next();
			book.setAttribute("id", id);
			for(int j=0;j<elements.size();j++){
				System.out.println("input the"+(i+1)+" book "+elements.get(j).getNodeName());
				String str=in.next();
				elements.get(j).setTextContent(str);
				book.appendChild(elements.get(j));
			}
			//将book节点添加到bookstore根节点中
			bookstore.appendChild(book);
		}
		//将bookstore节点（已经包含了book）添加到dom树中
		document.appendChild(bookstore);
		//创建TransformerFactory对象
		TransformerFactory tff = TransformerFactory.newInstance();
		try {
			//创建Transformer对象
			Transformer tf = tff.newTransformer();
			tf.setOutputProperty(OutputKeys.INDENT, "yes");
			tf.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
			tf.transform(new DOMSource(document),new StreamResult(new File("books1.xml")));
		} catch (TransformerConfigurationException e) {
			e.printStackTrace();
		} catch (TransformerException e) {
			e.printStackTrace();
		}
	}
	
	public static void main(String[] args) {
		CreateXML creatXml = new CreateXML();
		creatXml.createXML();
	}

}


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  • IOldCat
    2016-04-23 01:16:45

    ```

    package com.imooc.domtest.test;


    import java.io.File;

    import java.io.FileOutputStream;

    import java.io.OutputStream;

    import java.util.ArrayList;

    import java.util.Scanner;


    import javax.xml.parsers.DocumentBuilder;

    import javax.xml.parsers.DocumentBuilderFactory;

    import javax.xml.parsers.ParserConfigurationException;

    import javax.xml.transform.OutputKeys;

    import javax.xml.transform.Result;

    import javax.xml.transform.Transformer;

    import javax.xml.transform.TransformerConfigurationException;

    import javax.xml.transform.TransformerException;

    import javax.xml.transform.TransformerFactory;

    import javax.xml.transform.dom.DOMSource;

    import javax.xml.transform.stream.StreamResult;


    import org.w3c.dom.Document;

    import org.w3c.dom.Element;


    public class CreateXML {


    public DocumentBuilder getDocumentBuilder(){

    // 创建一个DocumentBuilderFactory的对象

    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

    // 创建DocumentBuilder对象

    DocumentBuilder db =null;

    try {

    db = dbf.newDocumentBuilder();

    } catch (ParserConfigurationException e) {

    e.printStackTrace();

    }

    return db;

    }

    /**

    * 生成xml

    */

    public void createXML(){

    Scanner in =new Scanner(System.in);

    DocumentBuilder db = getDocumentBuilder();

    Document document = db.newDocument();

    document.setXmlStandalone(true);

    Element bookstore = document.createElement("bookStore");

    System.out.print("创建多少本书？：");

    //向bookstore根节点中添加子节点book

    int n=in.nextInt();

    for(int i=0;i<n;i++){

    ArrayList<Element> elements=new ArrayList<Element>();

    Element book = document.createElement("book");

    Element name = document.createElement("name");

    Element price = document.createElement("price");

    Element language = document.createElement("language");

    Element year = document.createElement("year");

    elements.add(name);

    elements.add(price);

    elements.add(language);

    elements.add(year);

    // name.setNodeValue("小王子");

    System.out.println("---------第"+(i+1)+"本书--------");

    System.out.println("input the "+(i+1)+" book id");

    String id=in.next();

    book.setAttribute("id", id);

    for(int j=0;j<elements.size();j++){

    System.out.println("input the"+(i+1)+" book "+elements.get(j).getNodeName());

    String str=in.next();

    elements.get(j).setTextContent(str);

    book.appendChild(elements.get(j));

    }

    //将book节点添加到bookstore根节点中

    bookstore.appendChild(book);

    }

    //将bookstore节点（已经包含了book）添加到dom树中

    document.appendChild(bookstore);

    //创建TransformerFactory对象

    TransformerFactory tff = TransformerFactory.newInstance();

    try {

    //创建Transformer对象

    Transformer tf = tff.newTransformer();

    tf.setOutputProperty(OutputKeys.INDENT, "yes");

    tf.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");

    tf.transform(new DOMSource(document),new StreamResult(new File("books1.xml")));

    } catch (TransformerConfigurationException e) {

    e.printStackTrace();

    } catch (TransformerException e) {

    e.printStackTrace();

    }

    }

    public static void main(String[] args) {

    CreateXML creatXml = new CreateXML();

    creatXml.createXML();

    }


    }

    ```

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