Create map比对差异.md

Author: sunli8539

Java/map比对差异.md

@@ -0,0 +1,33 @@
+```java
+import com.google.common.collect.MapDifference;
+import com.google.common.collect.Maps;
+import com.github.wnameless.json.flattener.JsonFlattener;
+import cn.hutool.core.util.XmlUtil;
+
+Map<String, Object> left = XMLUtils.flattenAsMap(leftFile);
+Map<String, Object> right = XMLUtils.flattenAsMap(rightFile);
+MapDifference<String, Object> difference = Maps.difference(left, right);
+
+Map<String, MapDifference.ValueDifference<Object>> diffMap = difference.entriesDiffering();
+Map<String, Object> leftOnlyMap = difference.entriesOnlyOnLeft();
+Map<String, Object> rightOnlyMap = difference.entriesOnlyOnRight();
+
+
+    public static Map<String, Object> flattenAsMap(String filePath) {
+        long s = System.currentTimeMillis();
+        String xml = XmlUtil.toStr(XmlUtil.readXML(filePath));
+        String json = JsonUtils.mapToJson(XmlUtil.xmlToMap(xml));
+        long e = System.currentTimeMillis();
+        log.info("parseXml2Json {} cost {}", filePath, e - s);
+        return JsonFlattener.flattenAsMap(json);
+    }
+
+    public static String mapToJson(Map map) {
+        try {
+            return new ObjectMapper().writeValueAsString(map);
+        } catch (Exception e) {
+            LOGGER.error("mapToJson error:{}", e);
+            throw new BusinessException("mapToJson exception");
+        }
+    }
+```