利用Java怎么对对象进行操作-创新互联

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对象复制(反射法)

public static void copyProp(Object from, Object to, String... filterProp) {
    HashSet filterSet = new HashSet(Arrays.asList(filterProp));
    Class<?> fromc = from.getClass();
    Class<?> toc = to.getClass();
    List to_fields = new ArrayList() ;
    while (toc != null) {
      to_fields.addAll(Arrays.asList(toc.getDeclaredFields()));
      toc = toc.getSuperclass();
    }
    for (Field to_field : to_fields) {
      try{
        if (filterSet.contains(to_field.getName())||"serialVersionUID".equals(to_field.getName())) {
          continue;
        }
        Field from_field = null;
        try{
          from_field = fromc.getDeclaredField(to_field.getName());
        }catch (Exception e){
          continue;
        }
        from_field.setAccessible(true);
        Object value = from_field.get(from);
        if(value==null){
          continue;
        }
        to_field.setAccessible(true);
        to_field.set(to, value);
      }catch (Exception e){
        e.printStackTrace();
      }
    }
  }