springmvc封装list个数限制问题

Posted 2021-01-06

提交一颗树，三级区域个数大于1000个导致提交失败！！！

org.springframework.beans.InvalidPropertyException: Invalid property ‘divisionList[1000]‘ of bean class [com.gome.bean.Presell]: Index of out of bounds in property path ‘divisionList[1000]‘; nested exception is java.lang.IndexOutOfBoundsException: Index: 1000, Size: 1000
    org.springframework.beans.BeanWrapperImpl.getPropertyValue(BeanWrapperImpl.java:811)
    org.springframework.beans.BeanWrapperImpl.getNestedBeanWrapper(BeanWrapperImpl.java:554)

 

溯源了下Spring的代码，找到了DataBinder，先解释下DataBinder类的作用，见链接 
http://docs.spring.io/spring/docs/1.2.x/api/org/springframework/validation/DataBinder.html 
其中有一句

INFO: More than the maximum number of request parameters (GET plus POST) for a single request ([10,000]) were detected. Any parameters beyond this limit have been ignored. To change this limit, set the maxParameterCount attribute on the Connector.
 Note: further occurrences of this error will be logged at DEBUG level.

解决如下：重set下autoGrowCollectionLimit，当做绑定的时候set为3000或者更大 
在Controller重写这个方法

/**
     * 由于Spring在接受前台传入的List时，就会出现256的IndexOutOfBoundsException异常
     * 设置setAutoGrowCollectionLimit为1024
     * @param binder
     * @see [类、类#方法、类#成员]
     */
    @InitBinder
    public void initListBinder(WebDataBinder binder)
    {
        // 设置需要包裹的元素个数，默认为256
        binder.setAutoGrowCollectionLimit(3000);
    }

或者不用表单提交

先转换成json字符串到后台 然后用jsonarray反序列和成集合对象也是可以的

原贴　　https://blog.csdn.net/zgliang88/article/details/52780213