java 反射之获取泛型对象的所有字段与对应的值(包括父类的)
上代码:
public static void main(String[] args) throws IntrospectionException { SysUser obj = new SysUser(); obj.setId(1L); obj.setUserName("测试"); obj.setCreatedDate(LocalDateTime.now()); Class<?> clazz = SysUser.class; Field[] tableFields = clazz.getDeclaredFields(); Class<?> superClazz = clazz.getSuperclass(); if (superClazz.equals(Object.class)) { System.out.println("没有父类"); } else { Field[] tableSuperFields = superClazz.getDeclaredFields(); Field[] superFields = new Field[tableFields.length + tableSuperFields.length]; System.arraycopy(tableFields, 0, superFields, 0, tableFields.length); System.arraycopy(tableSuperFields, 0, superFields, tableFields.length, tableSuperFields.length); Field[] allFields = getSuperClassFields(superFields, superClazz); for (int i = 0; i < allFields.length; i++) { PropertyDescriptor pd = new PropertyDescriptor(allFields[i].getName(), clazz); Method getMethod = pd.getReadMethod();//获得get方法 Object fieldValue = ReflectionUtils.invokeMethod(getMethod, obj); if(fieldValue == null){ continue; } System.out.println(allFields[i].getName() + "的值:" + fieldValue.toString()); } } }
//获取父类的所有字段 private static Field[] getSuperClassFields(Field[] tableFields, Class<?> clazz) { Class<?> superClazz = clazz.getSuperclass(); if (superClazz.equals(Object.class)) { return tableFields; } Field[] tableSuperFields = superClazz.getDeclaredFields(); Field[] c = new Field[tableFields.length + tableSuperFields.length]; System.arraycopy(tableFields, 0, c, 0, tableFields.length); System.arraycopy(tableSuperFields, 0, c, tableFields.length, tableSuperFields.length); getSuperClassFields(c, superClazz); return c; }
输出结果: