拷贝两个对象属性值属性值为空不拷贝

素颜马尾好姑娘i 2023-02-10 03:40 15阅读 0赞

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) {//这里判断以下value是否为空
                                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);
                        }
                    }
                }
            }
        }

原文链接 [https://blog.csdn.net/qq\_34871626/article/details/102614369][https_blog.csdn.net_qq_34871626_article_details_102614369]

[https_blog.csdn.net_qq_34871626_article_details_102614369]: https://blog.csdn.net/qq_34871626/article/details/102614369