使用Powershll 取出List中Item的权限

#Write-Host "Loading SharePoint Powershell Snapin..."    
#Add-PSSnapin "Microsoft.SharePoint.Powershell" 
$spWeb = Get-SPWeb -Identity http://xxxxxxxx
$spList = $spWeb.GetList("xxxxxx")
#取第一条数据
$spListItemCollection = $spList.GetItemById(1)

Write-Host $spListItemCollection.Count

$spListItemCollection[1].RoleAssignments 
#遍历查询的Item
foreach ($item in $spListItemCollection)
{
    #遍历所有的Role
    foreach($roleAssignment in $item.RoleAssignments)
    {
        #遍历Role中绑定的权限
        foreach($definition in $role.RoleDefinitionBindings)
        {
            #取出权限是读的Role
            if($definition.Name -eq "Read")
            {
                Write-Host $roleAssignment.Member ": "  $definition.Name
            }
        }
    }
}