1 private User copyFieldValues(User userData, User user) {
2 Field[] fields = user.getClass().getDeclaredFields();
3 String[] fieldNames = getFieldNames(fields);
4 for (int i = 0; i < fieldNames.length; i++) {
5 Object value = getFieldValueByName(fieldNames[i], user);
6 if (value != null) {
7 setFieldValueByName(fieldNames[i], userData, value,fields[i].getType());
8 }
9 }
10 return userData;
11 }
1 private String[] getFieldNames(Field[] fields) {
2 String[] fieldNames = new String[fields.length];
3 for (int i = 0; i < fields.length; i++) {
4 fieldNames[i] = fields[i].getName();
5 }
6 return fieldNames;
7 }
1 private Object getFieldValueByName(String fieldName, Object o) {
2 Object value = null;
3 try {
4 String getter = "get" + initStr(fieldName);
5 Method method = o.getClass().getMethod(getter);
6 value = method.invoke(o);
7 } catch (Exception e) {
8 e.printStackTrace();
9 }
10 return value;
11 }
1 private void setFieldValueByName(String fieldName, Object o, Object value, Class<?> type) {
2 try {
3 String setter = "set" + initStr(fieldName);
4 Method method = o.getClass().getMethod(setter, type);
5 method.invoke(o, value);
6 } catch (Exception e) {
7 e.printStackTrace();
8 }
9 }
1 private String initStr(String fieldName) {
2 return fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);
3 }
