feat(Java_ConstractUtil):创建项目、单测，进行第一轮简单的测试

src/main/java/handler/MapHandler.java

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+/*
+ * Copyright (c) 2020.
+ * made by 志军
+ */
+
+package handler;
+
+import com.esotericsoftware.reflectasm.MethodAccess;
+import org.apache.commons.collections.CollectionUtils;
+import util.MapUtil;
+import util.SetUtil;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * 处理Map对应的对比
+ *
+ * @author 志军
+ */
+public class MapHandler {
+
+    @SuppressWarnings("unchecked")
+    public static boolean putValue(Object originChange, Object targetChange, Object originValue, Object targetValue,
+                                   MethodAccess methodAccess, String setName) throws IllegalAccessException, InstantiationException {
+        //参数前置
+        boolean changed = false;
+        Set<Map.Entry> originEntry = ((Map) originValue).entrySet();
+        Set<Map.Entry> targetEntry = ((Map) targetValue).entrySet();
+        Map originMap = (Map) originValue.getClass().newInstance();
+        Map targetMap = (Map) targetValue.getClass().newInstance();
+
+        //处理key一样的value比较.
+        for (Map.Entry entry : originEntry) {
+            Object key = entry.getKey();
+            for (Map.Entry tEntry : targetEntry) {
+                if (tEntry.getKey().equals(key)) {
+                    //每一个key都进行比较,如果key相等则比较对应的value，这个value需要重写hashcode和equals方法
+                    changed = changed || MapHandler.putValue(originChange, targetChange, originMap, targetMap, key);
+                    break;
+                }
+            }
+        }
+
+        //得到不一致的key的集合.
+        List<Map.Entry> originList = SetUtil.findUnLikeValue(originEntry, targetEntry);
+        List<Map.Entry> changeList = SetUtil.findUnLikeValue(originEntry, targetEntry);
+        //计算changed的值
+        changed = changed || !CollectionUtils.isEmpty(originList) || CollectionUtils.isEmpty(changeList);
+        //把不一致的值设置会新的Map中
+        MapUtil.putIfNotEmpty(originMap, originList);
+        MapUtil.putIfNotEmpty(targetMap, changeList);
+        //对对象进行设值
+        methodAccess.invoke(originChange, setName, originValue);
+        methodAccess.invoke(targetChange, setName, targetValue);
+        return changed;
+    }
+
+    private static boolean putValue(Object originChange, Object targetChange, Map<Object, Object> originMap,
+                                    Map<Object, Object> targetMap, Object key) {
+        if (originChange.equals(targetChange)) {
+            return false;
+        }
+        originMap.put(key, originChange);
+        targetMap.put(key, targetChange);
+        return true;
+    }
+}