IllegalStateException

IllegalStateException

java.lang.IllegalStateException: Optional long parameter 'id' is present but cannot be translated into a null value due to being declared as a primitive type. Consider declaring it as object wrapper for the corresponding primitive type.

1 angularJS

controller代碼

// 根據id查詢列表
this.findByParentId=function(parentId){
    return $http.get('../itemCat/findByParentId.do?parentId='+parentId);
} 

service代碼

    //搜索
$scope.findByParentId=function(parentId){  
    alert(parentId);
    itemCatService.findByParentId(parentId).success(
        function(response){
            $scope.list=response;
        }           
    );
}

2 web

service代碼

//根據id查詢列表數據
public List<TbItemCat> findByParentId(Long id);

serviceImpl代碼

@Override
    public List<TbItemCat> findByParentId(Long id) {
        System.out.println(id);
        TbItemCatExample example = new TbItemCatExample();
        Criteria criteria = example.createCriteria();
        criteria.andParentIdEqualTo(id);
        return itemCatMapper.selectByExample(example);       
    }   

controller代碼

// 根據id查詢列表
@RequestMapping("/findByParentId")
public List<TbItemCat> findByParentId(long id) {
    System.out.println(parentId);
    return itemCatService.findByParentId(parentId);
}

檢查發現後端controller參數是long,改成包裝類Long,發生如下報警

java.lang.RuntimeException: Value for parentId cannot be null

將id輸出運行,輸出爲null,檢查參數,發現參數名錯誤……..與get請求提交不一致