var selectedUsers = $('#users').tagbox('getValues');
if (selectedUsers.length > 0) {
    $.post(appPath + "/role/users/add/", {
        'systemID' : $('#systemID').combobox('getValue'),
        'roleID' : roleID,
        'users' : selectedUsers
    }, function(result, status) {
        if (result == 'false') {
            $.messager.show({
                title : '角色管理',
                msg : '添加用户发生异常'
            });
        }
        // 刷新被选择的用户
        getSelectedRoleUsers();
});

@PostMapping("/users/add/")
@ResponseBody
public String addUsers(String systemID, String roleID, @RequestParam(name = "users[]") String[] users) {

}