spring mvc get 请求对于 “Sun Sep 29 00:28:16 CST 2019”格式日期的处理

淡淡的烟草味﹌ 2023-08-17 16:32 44阅读 0赞

1.首先spring mvc 没有指定  日期处理格式，比如 spring.mvc.date-format=yyyy-MM-dd HH:mm:ss 或者 其他形式的日期转化配置；

2.get请求参数为“Sun Sep 29 00:28:16 CST 2019”，controller中接收日期的类型为 java.util.Date。在

org.springframework.core.convert.support.ObjectToObjectConverter.convert(@Nullable Object source, TypeDescriptor sourceType, TypeDescriptor targetType)方法中

@Nullable
    public Object convert(@Nullable Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
    // source="Sun Sep 29 00:28:16 CST 2019"
        if (source == null) {
            return null;
        } else {
            Class<?> sourceClass = sourceType.getType();// java.lang.String
            Class<?> targetClass = targetType.getType();// java.util.Data
            Member member = getValidatedMember(targetClass, sourceClass);// public java.util.Date(java.lang.String)
    
            try {
                if (member instanceof Method) {// false
                    Method method = (Method)member;
                    ReflectionUtils.makeAccessible(method);
                    if (!Modifier.isStatic(method.getModifiers())) {
                        return method.invoke(source);
                    }
    
                    return method.invoke((Object)null, source);
                }
    
                if (member instanceof Constructor) {// true
                    Constructor<?> ctor = (Constructor)member;
                    ReflectionUtils.makeAccessible(ctor);
                    return ctor.newInstance(source);// 构造Date对象类似 new Date("Sun Sep 29 00:28:16 CST 2019"); --结果为--> Sun Sep 29 14:28:16 CST 2019 // 相差了12小时
                }
            } catch (InvocationTargetException var8) {
                throw new ConversionFailedException(sourceType, targetType, source, var8.getTargetException());
            } catch (Throwable var9) {
                throw new ConversionFailedException(sourceType, targetType, source, var9);
            }
    
            throw new IllegalStateException(String.format("No to%3$s() method exists on %1$s, and no static valueOf/of/from(%1$s) method or %3$s(%1$s) constructor exists on %2$s.", sourceClass.getName(), targetClass.getName(), targetClass.getSimpleName()));
        }
    }

3.如果指定了 spring.mvc.date-format=yyyy-MM-dd HH:mm:ss，则会因为“Sun Sep 29 00:28:16 CST 2019”无法parse出现异常