[20210219] iframe, 개발자 도구(F12), BeanUtils copyProperties

[JuHyun419]

iframe 부모 & 자식 접근

// 부모 함수 호출
parent.함수명;

// 부모 요소 접근
$(parent.document).find('셀렉터');

// 부모 오소 접근
parent.document.getElementById('아이디');

// 자식 요소 접근
$('#iframe 아이디').contents().find('셀렉터');

// 자식 요소 접근
frames['아이프레임아이디'].document.getElementById('아이디');

개발자 도구(F12)

• 잘 활용하자 !!
• console 창에서 바로 log 찍어서 해당 값 확인할 수 있음
• 특정 요소에 접근할 때 ..

Spring BeanUtils copyProperties

• 객체 복사할 때 setter 메소드로 일일이 설정하지 않아도 사용할 수 있음

• 설정하지 않을 property가 있으면 매개변수에 넣어줄 수 있음(가변인자)

  // before
  person2.setName(person1.getName());
  person2.setAddress(person1.getAddress());
  person2.setId(person1.getId());
  person2.setPhone(person1.getPhone());
  
  // after
  BeanUtils.copyProperties(person1, person2);
  

    public static void copyProperties(Object source, Object target) throws BeansException {
        copyProperties(source, target, (Class)null, (String[])null);
    }

    public static void copyProperties(Object source, Object target, Class<?> editable) throws BeansException {
        copyProperties(source, target, editable, (String[])null);
    }

    public static void copyProperties(Object source, Object target, String... ignoreProperties) throws BeansException {
        copyProperties(source, target, (Class)null, ignoreProperties);
    }

    private static void copyProperties(Object source, Object target, @Nullable Class<?> editable, @Nullable String... ignoreProperties) throws BeansException {
        Assert.notNull(source, "Source must not be null");
        Assert.notNull(target, "Target must not be null");
        Class<?> actualEditable = target.getClass();
        if (editable != null) {
            if (!editable.isInstance(target)) {
                throw new IllegalArgumentException("Target class [" + target.getClass().getName() + "] not assignable to Editable class [" + editable.getName() + "]");
            }

            actualEditable = editable;
        }

        PropertyDescriptor[] targetPds = getPropertyDescriptors(actualEditable);
        List<String> ignoreList = ignoreProperties != null ? Arrays.asList(ignoreProperties) : null;
        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 && (ignoreList == null || !ignoreList.contains(targetPd.getName()))) {
                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 (!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);
                        }
                    }
                }
            }
        }

    }