Java生成XML文件；Java将document对象转化成String

最新推荐文章于 2022-05-12 12:56:48 发布

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最新推荐文章于 2022-05-12 12:56:48 发布

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分类专栏： JAVA 文章标签： xml java 开发语言

本文链接：https://blog.youkuaiyun.com/qq_38270306/article/details/123475038

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本文介绍了一个Java程序，它通过DocumentBuilderFactory创建XML文档，并演示了如何使用DOM和Transformer进行XML文件的创建与格式化，包括元素添加、属性设置及文件输出。重点在于展示了如何利用DOM操作和Transformer处理XML内容。

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package com.sss.cloud.log.controller;

import org.apache.commons.logging.Log;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.File;
import java.io.IOException;
import java.io.StringWriter;
import com.sun.org.apache.xml.internal.serialize.OutputFormat;
import com.sun.org.apache.xml.internal.serialize.XMLSerializer;

public class test {
public static void main(String[] args) {
Long start = System.currentTimeMillis();
createXml();
System.out.println(“运行时间：”+ (System.currentTimeMillis() - start));
}

public static void createXml(){
    try {
        // 创建解析器工厂
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        DocumentBuilder db = factory.newDocumentBuilder();
        Document document = db.newDocument();
        // 不显示standalone="no"
        document.setXmlStandalone(true);
        Element bookstore = document.createElement("root");
        //多个重复的子标签
        for(int i =0;i<2;i++){
            // 向bookstore根节点中添加子节点book
            Element book = document.createElement("LOG4A");

            Element resourcekind = document.createElement("RESOURCE_KIND");

            // 不显示内容 name.setNodeValue("不好使");
            resourcekind.setTextContent("雷,`s神4");
            book.appendChild(resourcekind);
            // 为book节点添加属性
            book.setAttribute("id", "1");
            // 将book节点添加到bookstore根节点中
            bookstore.appendChild(book);

        }
        // 将bookstore节点（已包含book）添加到dom树中
        document.appendChild(bookstore);
        doc2FormatString(document);

// System.out.println(document.wait());

        // 创建TransformerFactory对象
        TransformerFactory tff = TransformerFactory.newInstance();
        // 创建 Transformer对象
        Transformer tf = tff.newTransformer();

        // 输出内容是否使用换行
        tf.setOutputProperty(OutputKeys.INDENT, "yes");
        // 创建xml文件并写入内容
        tf.transform(new DOMSource(document), new StreamResult(new File("C:\\Users\\lenovo\\Desktop\\book1.xml")));
        System.out.println("生成book1.xml成功");
    } catch (Exception e) {
        e.printStackTrace();
        System.out.println("生成book1.xml失败");
    }
}



/**
 * @param doc XML的Document对象转化为Sting
 * @return String
 */
public static String doc2FormatString(Document doc) {
    String docString = "";
    if(doc != null){
        StringWriter stringWriter = new StringWriter();
        try{
            OutputFormat format = new OutputFormat(doc,"UTF-8",true);
            XMLSerializer serializer = new XMLSerializer(stringWriter,format);
            serializer.asDOMSerializer();
            serializer.serialize(doc);
            docString = stringWriter.toString();
            System.out.println("docString = " + docString);
        }catch(Exception e){
            e.printStackTrace();
        }finally{
            if(stringWriter != null){
                try {
                    stringWriter.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    return docString;
}

}