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) {
}