복제 2 객체 속성 값 속성 값이 비어 있음

public static void copyProperties(Object source, Object target) throws BeansException {
    Assert.notNull(source, "Source must not be null");
    Assert.notNull(target, "Target must not be null");
    Class> actualEditable = target.getClass();

    PropertyDescriptor[] targetPds = getPropertyDescriptors(actualEditable);
    PropertyDescriptor[] var7 = targetPds;
    int var8 = targetPds.length;

    for (int var9 = 0; var9 < var8; ++var9) {
        PropertyDescriptor targetPd = var7[var9];
        Method writeMethod = targetPd.getWriteMethod();
        if (writeMethod != null) {
            PropertyDescriptor sourcePd = getPropertyDescriptor(source.getClass(), targetPd.getName());
            if (sourcePd != null) {
                Method readMethod = sourcePd.getReadMethod();
                if (readMethod != null && ClassUtils.isAssignable(writeMethod.getParameterTypes()[0], readMethod.getReturnType())) {
                    try {
                        if (!Modifier.isPublic(readMethod.getDeclaringClass().getModifiers())) {
                            readMethod.setAccessible(true);
                        }
                        Object value = readMethod.invoke(source);
                        if (value != null) {// value 
                            if (!Modifier.isPublic(writeMethod.getDeclaringClass().getModifiers())) {
                                writeMethod.setAccessible(true);
                            }
                            writeMethod.invoke(target, value);
                        }
                    } catch (Throwable var15) {
                        throw new FatalBeanException("Could not copy property '" + targetPd.getName() + "' from source to target", var15);
                    }
                }
            }
        }
    }

 
텍스트 링크https://blog.csdn.net/qq_34871626/article/details/102614369