<a href="${pageContext.request.contextPath}/role/findRoleByIdAndAllPermission.do?id=${role.id}" class="btn bg-olive btn-xs">添加权限</a>

    //根据roleId查询role，并查询出可以添加的权限
    @RequestMapping("/findRoleByIdAndAllPermission.do")
    public ModelAndView findRoleByIdAndAllPermission(@RequestParam(name = "id", required = true) String roleId) throws Exception {
        ModelAndView mv = new ModelAndView();
        //根据roleId查询role
        Role role = roleService.findById(roleId);
        //根据roleId查询可以添加的权限
        List<Permission> otherPermissions = roleService.findOtherPermissions(roleId);
        mv.addObject("role", role);
        mv.addObject("permissionList", otherPermissions);
        mv.setViewName("role-permission-add");
        return mv;
    }

   @Override
    public Role findById(String roleId) throws Exception {
        return roleDao.findById(roleId);
    }
  @Override
    public List<Permission> findOtherPermissions(String roleId) {
        return roleDao.findOtherPermissions(roleId);
    }

    @Select("select * from role where id=#{roleId}")
    @Results({
            @Result(id = true,property = "id",column = "id"),
            @Result(property = "roleName",column = "roleName"),
            @Result(property = "roleDesc",column = "roleDesc"),
            @Result(property = "permissions",column = "id",javaType = java.util.List.class,many = @Many(select = "com.itheima.ssm.dao.IPermissionDao.findPermissionByRoleId"))
    })
    Role findById(String roleId);
    @Select("select * from permission where id not in (select permissionId from role_permission where roleId=#{roleId})")
    List<Permission> findOtherPermissions(String roleId);

   //给角色添加权限
    @RequestMapping("/addPermissionToRole.do")
    public String addPermissionToRole(@RequestParam(name = "roleId", required = true) String roleId, @RequestParam(name = "ids", required = true) String[] permissionIds) throws Exception {
        roleService.addPermissionToRole(roleId, permissionIds);
        return "redirect:findAll.do";
    }

   @Override
    public void addPermissionToRole(String roleId, String[] permissionIds) {
        for(String permissionId:permissionIds){
            roleDao.addPermissionToRole(roleId,permissionId);
        }
    }

 @Insert("insert into role_permission(roleId,permissionId) values(#{roleId},#{permissionId})")
    void addPermissionToRole(@Param("roleId") String roleId, @Param("permissionId") String permissionId);
}