「Java」Introspector.getBeanInfo()でオブジェクト(object)をMapに相互変換するサンプルコード

2017年6月30日

Javaコード
public Map<String,Object> obj2Map(Object obj) throws Exception{
Map<String,Object> map=new HashMap<String, Object>();
BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
for (PropertyDescriptor property : propertyDescriptors) {
String key = property.getName();
if (key.compareToIgnoreCase(“class") == 0) {
continue;
}
Method getter = property.getReadMethod();
Object value = getter!=null ? getter.invoke(obj) : null;
map.put(key, value);
}
return map;
}

public Object map2Obj(Map<String,Object> map,Class<?> clz) throws Exception{
if (map == null)
return null;
Object obj = clz.newInstance();
BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
for (PropertyDescriptor property : propertyDescriptors) {
Method setter = property.getWriteMethod();
if (setter != null) {
setter.invoke(obj, map.get(property.getName()));
}
}
return obj;
}