场景：将一个层级类对象(领域驱动model对象)转换为平铺类对象(view)
src对象，(红框为子对象)
target对象(平铺对象)
代码思路，先递归反射遍历出所有字段，存到一个map里，再递归赋值给target对象
缺陷：不同子对象间的同名字段会被覆盖成一个值
代码
private static void getSrcALLFieldMap(Object obj,Map collectMap){
Class srcClazz = obj.getClass();
Field[] srcFields = srcClazz.getDeclaredFields();
Stream.of(srcFields).forEach(field -> {
field.setAccessible(true);
try {
if(field.getType().toString().contains("aacoin.account") && !field.getType().isEnum()){
Object subObj = field.get(obj);
if(subObj!=null)
getSrcALLFieldMap(subObj,collectMap);
}else{
collectMap.put(field.getName(),field.get(obj));
}
} catch (IllegalAccessException e) {
e.printStackTrace();
}
});
}
private static void setTargetAllField(Object obj, Map srcMap){
Class srcClazz = obj.getClass();
Field[] srcFields = srcClazz.getDeclaredFields();
Stream.of(srcFields).forEach(field -> {
field.setAccessible(true);
try {
if(field.getType().toString().contains("aacoin.trade.otc") && !field.getType().isEnum()){
Object subObj = field.get(obj);
if(subObj == null) {
Constructor cons = field.getType().getDeclaredConstructor(null);
cons.setAccessible(true);
subObj = cons.newInstance(null);
field.set(obj, subObj);
}
setTargetAllField(subObj, srcMap);
}else{
//collectMap.put(field,obj);
Object currentField = srcMap.get(field.getName());
if( currentField !=null && field.getType() == currentField.getClass()){
field.set(obj,currentField);
}
}
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
});
}
public static T convert(Object src,Class tClass){
Constructor cons = null;
try {
cons = tClass.getDeclaredConstructor(null);
} catch (NoSuchMethodException e) {
e.printStackTrace();
}
cons.setAccessible(true);
T result = null;
try {
result = cons.newInstance(null);
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
convert(src,result);
return result;
}
public static T convert(Object src,T result) {
Map srcMap = new HashMap();
getSrcALLFieldMap(src,srcMap);
setTargetAllField(result,srcMap);
return result;
}
调用：
adverVO =convert(advert,AdvertVO.class);
写的比较随意，直接吞掉了异常，需自行处理，将异常统一规范抛出
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