Java 使用 DOM4J 解析 XML 并转换为 JSON 示例

以下是使用 Java 处理字符串格式的 XML 信息并将其转化为 JSON 格式的示例代码，示例代码演示如何使用 Java 和 DOM4J 库解析 XML 数据并将其转换为 JSON 格式，并从 XML 中提取特定节点信息，并将信息转化为 JSON 对象。

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.json.JSONObject;

public class XmlToJsonConverter {
    public static void main(String[] args) {
        String xml = '<Organization><Department></Department><Devices><Device id="1000028" type="601" name="报警主机"><UnitNodes index="0" channelnum="60" type="3"><Channel id="1000028$3$0$0" name="防区1" desc="" status="0" channelType="0" channelSN="" rights="11000000000000000000000011101000000101100011111111111111111" alarmType="80081" alarmLevel="1" /> </UnitNodes></Device></Devices></Organization>';
        try {
            Document document = DocumentHelper.parseText(xml);
            Element root = document.getRootElement();
            Element deviceElement = root.element('Devices').element('Device');
            JSONObject json = convertElementToJson(deviceElement);
            System.out.println(json.toString());
        } catch (DocumentException e) {
            e.printStackTrace();
        }  
    }

    private static JSONObject convertElementToJson(Element element) {
        JSONObject json = new JSONObject();
        json.put('id', element.attributeValue('id'));
        json.put('type', element.attributeValue('type'));
        json.put('name', element.attributeValue('name'));

        JSONObject unitNodesJson = new JSONObject();
        Element unitNodesElement = element.element('UnitNodes');
        unitNodesJson.put('index', unitNodesElement.attributeValue('index'));
        unitNodesJson.put('channelnum', unitNodesElement.attributeValue('channelnum'));
        unitNodesJson.put('type', unitNodesElement.attributeValue('type'));

        JSONObject channelJson = new JSONObject();
        Element channelElement = unitNodesElement.element('Channel');
        channelJson.put('id', channelElement.attributeValue('id'));
        channelJson.put('name', channelElement.attributeValue('name'));
        channelJson.put('desc', channelElement.attributeValue('desc'));
        channelJson.put('status', channelElement.attributeValue('status'));
        channelJson.put('channelType', channelElement.attributeValue('channelType'));
        channelJson.put('channelSN', channelElement.attributeValue('channelSN'));
        channelJson.put('rights', channelElement.attributeValue('rights'));
        channelJson.put('alarmType', channelElement.attributeValue('alarmType'));
        channelJson.put('alarmLevel', channelElement.attributeValue('alarmLevel'));

        unitNodesJson.put('channel', channelJson);
        json.put('unitNodes', unitNodesJson);

        return json;
    }
}

输出结果为：

{
  "id": "1000028",
  "type": "601",
  "name": "报警主机",
  "unitNodes": {
    "index": "0",
    "channelnum": "60",
    "type": "3",
    "channel": {
      "id": "1000028$3$0$0",
      "name": "防区1",
      "desc": "",
      "status": "0",
      "channelType": "0",
      "channelSN": "",
      "rights": "11000000000000000000000011101000000101100011111111111111111",
      "alarmType": "80081",
      "alarmLevel": "1"
    }
  }
}