Util.java 文件源码

public static JsonObject convertToJson(final Object obj) {

        final JsonObjectBuilder b = Json.createObjectBuilder();

        try {
            final Class<?> objClass = obj.getClass();
            for (final Field field : objClass.getDeclaredFields()) {
                String name = field.getName();
                if (field.getAnnotation(XmlTransient.class) != null) {
                    continue;
                }

                final XmlElement xmlElement = field.getAnnotation(XmlElement.class);
                if (xmlElement != null && xmlElement.name() != null) {
                    name = xmlElement.name();
                }
                field.setAccessible(true);
                final Object value = field.get(obj);
                if (value == null) {
                    continue;
                }
                if (field.getType()
                    .isEnum()) {
                    final String enumValue = ((Enum<?>) value).name();
                    final XmlEnumValue xmlEnumValue = ((Enum<?>) value).getDeclaringClass()
                        .getField(enumValue)
                        .getAnnotation(XmlEnumValue.class);
                    if (xmlEnumValue != null && xmlEnumValue.value() != null) {
                        b.add(name, xmlEnumValue.value());
                    } else {
                        b.add(name, enumValue);
                    }

                } else if (field.getType() == String.class) {
                    b.add(name, (String) value);
                } else if (field.getType() == Integer.class) {
                    b.add(name, (Integer) value);
                } else if (field.getType() == BigInteger.class) {
                    b.add(name, (BigInteger) value);
                }
            }
            return b.build();
        } catch (IllegalAccessException
                 | SecurityException
                 | NoSuchFieldException e1) {
            throw new RuntimeException(e1);
        }
    }