增加xml解析工具类

weixin-java-common/src/main/java/me/chanjar/weixin/common/util/XmlUtils.java

@@ -0,0 +1,96 @@
+package me.chanjar.weixin.common.util;
+
+import java.io.StringReader;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.dom4j.Document;
+import org.dom4j.DocumentException;
+import org.dom4j.Element;
+import org.dom4j.Node;
+import org.dom4j.io.SAXReader;
+import org.dom4j.tree.DefaultText;
+
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+import com.google.common.collect.Sets;
+
+/**
+ * <pre>
+ * XML转换工具类.
+ * Created by Binary Wang on 2018/11/4.
+ * </pre>
+ *
+ * @author <a href="https://github.com/binarywang">Binary Wang</a>
+ */
+public class XmlUtils {
+
+  public static Map<String, Object> xml2Map(String xmlString) {
+    Map<String, Object> map = new HashMap<>(16);
+    try {
+      SAXReader saxReader = new SAXReader();
+      Document doc = saxReader.read(new StringReader(xmlString));
+      Element root = doc.getRootElement();
+      List<Element> elements = root.elements();
+      for (Element element : elements) {
+          map.put(element.getName(), element2MapOrString(element));
+      }
+    } catch (DocumentException e) {
+      throw new RuntimeException(e);
+    }
+
+    return map;
+  }
+
+  private static Object element2MapOrString(Element element) {
+    Map<String, Object> result = Maps.newHashMap();
+
+    final List<Node> content = element.content();
+    if (content.size() <= 1) {
+      return element.getText();
+    }
+
+    final Set<String> names = names(content);
+    if (names.size() == 1) {
+      // 说明是个列表，各个子对象是相同的name
+      List<Object> list = Lists.newArrayList();
+      for (Node node : content) {
+        if (node instanceof DefaultText) {
+          continue;
+        }
+
+        if (node instanceof Element) {
+          list.add(element2MapOrString((Element) node));
+        }
+      }
+
+      result.put(names.iterator().next(), list);
+    } else {
+      for (Node node : content) {
+        if (node instanceof DefaultText) {
+          continue;
+        }
+
+        if (node instanceof Element) {
+          result.put(node.getName(), element2MapOrString((Element) node));
+        }
+      }
+    }
+
+    return result;
+  }
+
+  private static Set<String> names(List<Node> nodes) {
+    Set<String> names = Sets.newHashSet();
+    for (Node node : nodes) {
+      if (node instanceof DefaultText) {
+        continue;
+      }
+      names.add(node.getName());
+    }
+
+    return names;
+  }
+}