您可以执行以下操作遍历树并跟踪找出点表示法属性名称的深度：
import com.fasterxml.jackson.databind.JsonNode;import com.fasterxml.jackson.databind.ObjectMapper;import com.fasterxml.jackson.databind.node.ArrayNode;import com.fasterxml.jackson.databind.node.ObjectNode;import com.fasterxml.jackson.databind.node.ValueNode;import java.io.IOException;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import org.junit.Test;public class FlattenJson { String json = "{n" + " "Port":n" + " {n" + " "@alias": "defaultHttp",n" + " "Enabled": "true",n" + " "Number": "10092",n" + " "Protocol": "http",n" + " "KeepAliveTimeout": "20000",n" + " "ThreadPool":n" + " {n" + ""@enabled": "false",n" + ""Max": "150",n" + ""ThreadPriority": "5"n" + " },n" + " "ExtendedProperties":n" + " {n" + ""Property":n" + "[ n" + " {n" + " "@name": "connectionTimeout",n" + " "$": "20000"n" + " }n" + "]n" + " }n" + " }n" + "}"; @Test public void testCreatingKeyValues() { Map<String, String> map = new HashMap<String, String>(); try { addKeys("", new ObjectMapper().readTree(json), map); } catch (IOException e) { e.printStackTrace(); } System.out.println(map); } private void addKeys(String currentPath, JsonNode jsonNode, Map<String, String> map) { if (jsonNode.isObject()) { ObjectNode objectNode = (ObjectNode) jsonNode; Iterator<Map.Entry<String, JsonNode>> iter = objectNode.fields(); String pathPrefix = currentPath.isEmpty() ? "" : currentPath + "."; while (iter.hasNext()) { Map.Entry<String, JsonNode> entry = iter.next(); addKeys(pathPrefix + entry.getKey(), entry.getValue(), map); } } else if (jsonNode.isArray()) { ArrayNode arrayNode = (ArrayNode) jsonNode; for (int i = 0; i < arrayNode.size(); i++) { addKeys(currentPath + "[" + i + "]", arrayNode.get(i), map); } } else if (jsonNode.isValueNode()) { ValueNode valueNode = (ValueNode) jsonNode; map.put(currentPath, valueNode.asText()); } }}它产生以下图：
Port.ThreadPool.Max=150, Port.ThreadPool.@enabled=false, Port.Number=10092, Port.ExtendedProperties.Property[0].@name=connectionTimeout, Port.ThreadPool.ThreadPriority=5, Port.Protocol=http, Port.KeepAliveTimeout=20000, Port.ExtendedProperties.Property[0].$=20000, Port.@alias=defaultHttp, Port.Enabled=true
尽管您说JSON是任意的，但最终可能会导致键名冲突，因此剥离
@和
$属性名应该足够容易。
