基于java中两个对象属性的比较

public static void main(String[] args) {A a = new A();a.setUserName("a");a.setPassword("p");a.setQq("q");a.setWechat("w");

 A b = new A(); b.setUserName("a"); b.setPassword("p"); b.setQq("q"); b.setWechat("ww"); //只是比较两个对象是否相等，那么直接重写equals方法 System.out.println( a.equals(b)); try {  Map<String, String> maps = compare( a, b );  System.out.println(); } catch (Exception e) {  e.printStackTrace(); }}public static <T> Map<String, String> compare(T obj1, T Obj2)  throws Exception { Map<String, String> result = new HashMap<String, String>(); Field[] fs = obj1.getClass().getDeclaredFields(); for (Field f : fs) {  f.setAccessible(true);  Object v1 = f.get(obj1);  Object v2 = f.get(Obj2);  if( ! equals(v1, v2) ){   result.put(f.getName(), String.valueOf(equals(v1, v2)));  } } return result;}public static boolean equals(Object obj1, Object obj2) { if (obj1 == obj2) {  return true; } if (obj1 == null || obj2 == null) {  return false; } return obj1.equals(obj2);}