springmvc默认只支持256个对象映射

<form>
	
		<input type='hidden' name='showColumnDto[0].id' value='599'>
		<input type='hidden' name='showColumnDto[0].columnname' value='id'>
		<input type='hidden' name='showColumnDto[0].name' value='id'>
		<input type='hidden' name='showColumnDto[0].isshow' value='false'>
		<input type='hidden' name='showColumnDto[0].index' value='1'>
		...
		
		<input type='hidden' name='showColumnDto[254].id' value='599'>
		<input type='hidden' name='showColumnDto[254].columnname' value='id'>
		<input type='hidden' name='showColumnDto[254].name' value='id'>
		<input type='hidden' name='showColumnDto[254].isshow' value='false'>
		<input type='hidden' name='showColumnDto[254].index' value='1'>
		<input type='hidden' name='showColumnDto[255].id' value='599'>
		<input type='hidden' name='showColumnDto[255].columnname' value='worktype'>
		<input type='hidden' name='showColumnDto[255].name' value='售后'>
		<input type='hidden' name='showColumnDto[255].isshow' value='false'>
		<input type='hidden' name='showColumnDto[255].index' value='1'>
		<input type='hidden' name='showColumnDto[256].id' value='599'>
		<input type='hidden' name='showColumnDto[256].columnname' value='extraid'>
		<input type='hidden' name='showColumnDto[256].name' value='jobs_1'>
		<input type='hidden' name='showColumnDto[256].isshow' value='false'>
		<input type='hidden' name='showColumnDto[256].index' value='1'>
	</form>

 问题描述：form表单数组个数小于等于256时正常，大于256时，springMVC Controller报错如下：

2015-3-10 20:44:26 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet dispatcher threw exception
java.lang.IndexOutOfBoundsException: Index: 256, Size: 256
	at java.util.ArrayList.RangeCheck(ArrayList.java:547)

 感觉应该程序没错误，只是某个地方有默认设置。后经多方查证，是因为springmvc默认只支持256个对象映射，加入以下代码即可解决：

 

@InitBinder
	public void initListBinder(WebDataBinder binder) {
		// 设置需要包裹的元素个数，默认为256
	    binder.setAutoGrowCollectionLimit(5000);
	}