单节点xml转map 和 map转xml

最新推荐文章于 2024-03-26 15:30:34 发布

原创最新推荐文章于 2024-03-26 15:30:34 发布 · 368 阅读

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#xml转map

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本文介绍了一个实用的工具类，用于实现Java中Map与XML之间的相互转换。该工具类包括从XML字符串转换到Map、从Map转换到XML字符串（含防转译版本）等功能。适用于需要进行数据格式转换的场景。

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直接上代码

import org.dom4j.*;

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.StringWriter;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * @Author: lilong
 * @Data: Created on 2018/8/28
 * @Desc:map和xml转换工具类
 */
public class MapXmlTool {
    /**
     * xml  To  map
     * @throws Exception
     */
    public static Map<String, Object> xmlToMap(String responseXmlTemp) throws DocumentException {
        Document doc = DocumentHelper.parseText(responseXmlTemp);
        Element rootElement = doc.getRootElement();
        Map<String, Object> mapXml = new HashMap<>();
        elementToMap(mapXml, rootElement);
        return mapXml;
    }
/**
* @Author : lilong
* @Description :使用递归调用将多层级xml转为map
* @Date : 9:57 2018/8/28
**/
    private static void elementToMap(Map<String, Object> map, Element rootElement) {
        // 获得当前节点的子节点
        List<Element> childElements = rootElement.elements();
        if (childElements.size() > 0) {
            Map<String, Object> tempMap = new HashMap<>();
            for (Element e : childElements) {
                elementToMap(tempMap, e);
                map.put(rootElement.getName(), tempMap);
            }
        } else {
            map.put(rootElement.getName(), rootElement.getText());
        }
    }


    /**
    * @Author : lilong
    * @Description :map 转 xml--不加防转译
    * @Date : 15:44 2018/12/24
    * @Param : map的key不能用纯数字 否则报错org.w3c.dom.DOMException: INVALID_CHARACTER_ERR: An invalid or illegal XML character is specified.
    **/
    public static String mapToXmlString(Map<String, String> map) throws Exception {
        DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
        org.w3c.dom.Document document = documentBuilder.newDocument();
        org.w3c.dom.Element element = document.createElement("xml");
        document.appendChild(element);
        for (String key : map.keySet()) {
            String value = map.get(key);
            if (value == null) {
                value = "";
            }
            value = value.trim();
            org.w3c.dom.Element filed = document.createElement(key);
            filed.appendChild(document.createTextNode(value));
            element.appendChild(filed);
        }
        TransformerFactory tf = TransformerFactory.newInstance();
        Transformer transformer = tf.newTransformer();
        DOMSource source = new DOMSource(document);
        transformer.setOutputProperty(OutputKeys.ENCODING, "utf-8");
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        StringWriter write = new StringWriter();
        StreamResult result = new StreamResult(write);
        transformer.transform(source, result);
        String output = write.getBuffer().toString();////.replaceAll("\n|\r", "");
        try {
            write.close();
        } catch (Exception e) {

        }
        return output;
    }

    /**
    * @Author : lilong
    * @Description :map转xml---加防转译
    * @Date : 10:20 2018/12/24
    **/
    public static String mapXmlString(Map<String, Object> map) {
        String xmlResult = "";

        StringBuffer sb = new StringBuffer();
        sb.append("<xml>");
        for (String key : map.keySet()) {
            String value = "<![CDATA[" + map.get(key) + "]]>";
            sb.append("<" + key + ">" + value + "</" + key + ">");
        }
        sb.append("</xml>");
        xmlResult = sb.toString();
        return xmlResult;
    }

}