会记录变更前/后的值，变更字段的属性名，变更字段中午名称
先看效果：
 {
CompareResultVo compareResultVo = new CompareResultVo()
if (source == null && target == null) {
return compareResultVo
}
if (source == null || target == null) {
return compareResultVo
}
Class<?> oldClazz = source.getClass()
Class<?> newClazz = target.getClass()
if (oldClazz != newClazz) {
return compareResultVo
}
List<Field> fields = Arrays.stream(oldClazz.getDeclaredFields()).collect(Collectors.toList())
List<LabelValueResultVo> modifyInfoList = new ArrayList<>()
List<String> modifyFieldList = new ArrayList<>()
for (Field field : fields) {
try {
if (isSerialVersionUIDField(field.getName())) {
continue
}
fieldCheck(field, source, target, modifyInfoList,modifyFieldList)
} catch (Exception e) {
log.info("field.error.fieldName:{},errorMsg:{}", field.getName(), e.getMessage(), e)
}
}
compareResultVo.setModifyInfoList(modifyInfoList)
compareResultVo.setModifyFieldList(modifyFieldList)
return compareResultVo
}
/**
* 比较两个对象的指定字段是否相等
* @param field 字段
* @param source 源对象
* @param target 目标对象
* @param modifyInfoList 修改列表
* @throws Exception 异常
*/
public static void fieldCheck(Field field, Object source, Object target, List<LabelValueResultVo> modifyInfoList,List<String> modifyFieldList) throws Exception {
field.setAccessible(true)
NeedCompare needCompare = field.getAnnotation(NeedCompare.class)
if (needCompare == null) {
return
}
Class<?> type = field.getType()
if (isBaseType(type)) {
Object o1 = field.get(source)
Object o2 = field.get(target)
if (Objects.isNull(o1) && Objects.isNull(o2)){
return
}
if (Objects.isNull(o1)){
if (type == String.class){
if (StringUtils.isBlank(o2.toString())){
return
}
}
if (type == Date.class){
String s = DateUtil.dateToStr((Date) o2)
o2 = DateUtil.strToDate(s)
}
}
if (Objects.isNull(o2)){
if (type == String.class){
if (StringUtils.isBlank(o1.toString())){
return
}
}
if (type == Date.class){
String s = DateUtil.dateToStr((Date) o1)
o1 = DateUtil.strToDate(s)
}
}
if (!Objects.equals(o1, o2)) {
try {
ApiModelProperty apiModelProperty = field.getAnnotation(ApiModelProperty.class)
if (apiModelProperty != null) {
LabelValueResultVo labelValueVo = new LabelValueResultVo()
labelValueVo.setLabel(apiModelProperty.value())
ChangeVO changeVO = new ChangeVO()
changeVO.setBefore(Objects.isNull(field.get(source)) ? "" : field.get(source))
changeVO.setAfter(Objects.isNull(field.get(target)) ? "" : field.get(target))
labelValueVo.setValue(changeVO)
modifyInfoList.add(labelValueVo)
modifyFieldList.add(field.getName())
}
} catch (Exception e) {
log.info("field.error.fieldName:{},errorMsg:{}", field.getName(), e.getMessage(), e)
}
}
} else if (isCollection(type)) {
//集合比较
List o1 = (List) field.get(source)
List o2 = (List) field.get(target)
if (CollectionUtils.isEmpty(o1) && CollectionUtils.isEmpty(o2)){
return
}
ApiModelProperty apiModelProperty = field.getAnnotation(ApiModelProperty.class)
LabelValueResultVo labelValueVo = new LabelValueResultVo()
labelValueVo.setLabel(apiModelProperty.value())
if (o1.size() == o2.size() || o1.size() > o2.size()) {
// 创建一个临时列表用于存放相同的元素
List<Object> newList = new ArrayList<>(o1)
newList.retainAll(o2)
// 从 o1 和 o2 中删除相同的元素
o1.removeAll(newList)
o2.removeAll(newList)
if (CollectionUtils.isNotEmpty(o1) || CollectionUtils.isNotEmpty(o2)) {
ChangeVO changeVO = new ChangeVO()
List<LabelValueResultVo> labelValueResultVoList = getListField(o1,apiModelProperty.value())
List<LabelValueResultVo> labelValueResultVoList1 = getListField(o2,apiModelProperty.value())
changeVO.setBefore(labelValueResultVoList)
changeVO.setAfter(labelValueResultVoList1)
labelValueVo.setValue(changeVO)
modifyInfoList.add(labelValueVo)
modifyFieldList.add(field.getName())
}
}
if (o1.size() < o2.size()) {
// 创建一个临时列表用于存放相同的元素
List<Object> newList = new ArrayList<>(o2)
newList.retainAll(o1)
// 从 o1 和 o2 中删除相同的元素
o1.removeAll(newList)
o2.removeAll(newList)
if (CollectionUtils.isNotEmpty(o1) || CollectionUtils.isNotEmpty(o2)) {
ChangeVO changeVO = new ChangeVO()
List<LabelValueResultVo> labelValueResultVoList = getListField(o1, apiModelProperty.value())
List<LabelValueResultVo> labelValueResultVoList1 = getListField(o2,apiModelProperty.value())
changeVO.setBefore(labelValueResultVoList)
changeVO.setAfter(labelValueResultVoList1)
labelValueVo.setValue(changeVO)
modifyInfoList.add(labelValueVo)
modifyFieldList.add(field.getName())
}
}
} else {
Object o1 = field.get(source)
Object o2 = field.get(target)
if (o1 == null && o2 == null) {
return
}
List<Field> fields = Arrays.stream(field.get(source).getClass().getDeclaredFields()).collect(Collectors.toList())
for (Field field1 : fields) {
if (isSerialVersionUIDField(field1.getName())) {
continue
}
fieldCheck(field1, o1, o2, modifyInfoList,modifyFieldList)
}
}
}
/**
* 判断给定的字段名是否为serialVersionUID字段
* @param fieldName 字段名
* @return 如果字段名为"serialVersionUID"，则返回true，否则返回false
*/
public static boolean isSerialVersionUIDField(String fieldName){
return "serialVersionUID".equals(fieldName)
}
public static List<LabelValueResultVo> getListField(List list,String value) {
List<LabelValueResultVo> resultVos = new ArrayList<>()
try {
for (int i = 0
int x= i+1
LabelValueResultVo resultVo = new LabelValueResultVo()
List<LabelValueResultVo> newFesultVos = new ArrayList<>()
resultVo.setLabel(value+x)
List<Field> oldFields = Arrays.stream(list.get(i).getClass().getDeclaredFields()).collect(Collectors.toList())
for (Field field1 : oldFields) {
field1.setAccessible(true)
if (isSerialVersionUIDField(field1.getName())) {
continue
}
ApiModelProperty newApiModelProperty = field1.getAnnotation(ApiModelProperty.class)
if (newApiModelProperty == null) {
continue
}
NeedCompare newNeedCompare = field1.getAnnotation(NeedCompare.class)
if (newNeedCompare == null) {
continue
}
if (Objects.isNull(field1.get(list.get(i)))) {
continue
}
LabelValueResultVo labelValueResultVo = new LabelValueResultVo()
labelValueResultVo.setLabel(newApiModelProperty.value())
labelValueResultVo.setValue(field1.get(list.get(i)))
newFesultVos.add(labelValueResultVo)
}
resultVo.setValue(newFesultVos)
resultVos.add(resultVo)
//resultVos.addAll(labelValueResultVoList)
}
} catch (Exception e) {
log.info("getListField.error,msg:{}", e.getMessage(), e)
}
return resultVos
}
/**
* 是否是基本数据类型
*/
public static boolean isBaseType(Class<?> clazz) {
return clazz.isPrimitive() || clazz == String.class || clazz == Character.class || clazz == Boolean.class || clazz == Byte.class || clazz == Short.class || clazz == Integer.class || clazz == Long.class || clazz == Float.class || clazz == Double.class || clazz == BigInteger.class || clazz == BigDecimal.class
}
/**
* 标注在字段的注解，表示需要进行比较
*/
@Target({java.lang.annotation.ElementType.FIELD, java.lang.annotation.ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
public @interface NeedCompare {
}
@Data
public class CompareResultVo {
/**
* 变更内容
*/
private List<LabelValueResultVo> modifyInfoList
/**
* 变更的字段属性名称
*/
private List<String> modifyFieldList
}
@Data
public class LabelValueResultVo {
@ApiModelProperty("展示内容")
private Object label
@ApiModelProperty("值")
private Object value
}
@Data
public class ChangeVO {
private Object before
private Object after
}
