要擴展BeanUtils功能,可以通過自定義轉換器或者擴展BeanUtils類來實現。以下是兩種方法的示例:
public class CustomDateConverter implements Converter {
@Override
public <T> T convert(Class<T> type, Object value) {
if (value instanceof Date) {
return type.cast(value);
} else if (value instanceof String) {
try {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date date = sdf.parse((String) value);
return type.cast(date);
} catch (ParseException e) {
throw new ConversionException("Error converting value to Date", e);
}
} else {
throw new ConversionException("Unsupported type: " + value.getClass());
}
}
}
然后在使用BeanUtils之前注冊這個轉換器:
ConvertUtils.register(new CustomDateConverter(), Date.class);
public class CustomBeanUtils extends BeanUtils {
public static void copyPropertiesIgnore(Object source, Object target, String... ignoreProperties) {
try {
PropertyUtils.copyProperties(target, source);
for (String property : ignoreProperties) {
PropertyUtils.setProperty(target, property, null);
}
} catch (Exception e) {
throw new RuntimeException("Error copying properties", e);
}
}
}
然后在使用時使用這個自定義的BeanUtils類:
CustomBeanUtils.copyPropertiesIgnore(sourceObj, targetObj, "ignoreProperty1", "ignoreProperty2");
通過以上兩種方法,可以擴展BeanUtils的功能,實現更加靈活和個性化的對象屬性復制和轉換。