java处理数据查看范围

1.需求，查看 全部数据、本部门数据、本部门及以下数据、本人数据、自定义数据范围

2.

3.
**

• 数据权限过滤注解
  *

• @author wangwei
  /
  @Target(ElementType.METHOD)
  @Retention(RetentionPolicy.RUNTIME)
  @Documented
  public @interface DataScope
  {
  /*

  • 部门表的别名
    */
    public String deptAlias() default "";

    /**

  • 用户表的别名
    */
    public String userAlias() default "";

    /**

  • 权限字符（用于多个角色匹配符合要求的权限）默认根据权限注解@ss获取，多个权限用逗号分隔开来
    */
    public String permission() default "";
    }

4./**

• 数据过滤处理
  *

• @author wangwei
  /
  @Aspect
  @Component
  public class DataScopeAspect
  {
  /*

  • 全部数据权限
    */
    public static final String DATA_SCOPE_ALL = "1";

    /**

  • 自定数据权限
    */
    public static final String DATA_SCOPE_CUSTOM = "2";

    /**

  • 部门数据权限
    */
    public static final String DATA_SCOPE_DEPT = "3";

    /**

  • 部门及以下数据权限
    */
    public static final String DATA_SCOPE_DEPT_AND_CHILD = "4";

    /**

  • 仅本人数据权限
    */
    public static final String DATA_SCOPE_SELF = "5";

    /**

  • 数据权限过滤关键字
    */
    public static final String DATA_SCOPE = "dataScope";

    @Before("@annotation(controllerDataScope)")
    public void doBefore(JoinPoint point, DataScope controllerDataScope) throws Throwable
    {
    clearDataScope(point);
    handleDataScope(point, controllerDataScope);
    }

    protected void handleDataScope(final JoinPoint joinPoint, DataScope controllerDataScope)
    {
    // 获取当前的用户
    LoginUser loginUser = SecurityUtils.getLoginUser();
    if (StringUtils.isNotNull(loginUser))
    {

     SysUser currentUser = loginUser.getUser();
     // 如果是超级管理员，则不过滤数据
     if (StringUtils.isNotNull(currentUser) && !currentUser.isAdmin())
     {
         String permission = StringUtils.defaultIfEmpty(controllerDataScope.permission(), PermissionContextHolder.getContext());
         dataScopeFilter(joinPoint, currentUser, controllerDataScope.deptAlias(),
                 controllerDataScope.userAlias(), permission);
     }
    

    }
    }

    /**

  • 数据范围过滤
    *
  • @param joinPoint 切点
  • @param user 用户
  • @param deptAlias 部门别名
  • @param userAlias 用户别名

  • @param permission 权限字符
    */
    public static void dataScopeFilter(JoinPoint joinPoint, SysUser user, String deptAlias, String userAlias, String permission)
    {
    StringBuilder sqlString = new StringBuilder();
    List conditions = new ArrayList();

    for (SysRole role : user.getRoles())
    {

     String dataScope = role.getDataScope();
     if (!DATA_SCOPE_CUSTOM.equals(dataScope) && conditions.contains(dataScope))
     {
         continue;
     }
     if (StringUtils.isNotEmpty(permission) && StringUtils.isNotEmpty(role.getPermissions())
             && !StringUtils.containsAny(role.getPermissions(), Convert.toStrArray(permission)))
     {
         continue;
     }
     if (DATA_SCOPE_ALL.equals(dataScope))
     {
         sqlString = new StringBuilder();
         conditions.add(dataScope);
         break;
     }
     else if (DATA_SCOPE_CUSTOM.equals(dataScope))
     {
         sqlString.append(StringUtils.format(
                 " OR {}.dept_id IN ( SELECT dept_id FROM sys_role_dept WHERE role_id = {} ) ", deptAlias,
                 role.getRoleId()));
     }
     else if (DATA_SCOPE_DEPT.equals(dataScope))
     {
         sqlString.append(StringUtils.format(" OR {}.dept_id = {} ", deptAlias, user.getDeptId()));
     }
     else if (DATA_SCOPE_DEPT_AND_CHILD.equals(dataScope))
     {
         sqlString.append(StringUtils.format(
                 " OR {}.dept_id IN ( SELECT dept_id FROM sys_dept WHERE dept_id = {} or find_in_set( {} , ancestors ) )",
                 deptAlias, user.getDeptId(), user.getDeptId()));
     }
     else if (DATA_SCOPE_SELF.equals(dataScope))
     {
         if (StringUtils.isNotBlank(userAlias))
         {
             sqlString.append(StringUtils.format(" OR {}.user_id = {} ", userAlias, user.getUserId()));
         }
         else
         {
             // 数据权限为仅本人且没有userAlias别名不查询任何数据
             sqlString.append(StringUtils.format(" OR {}.dept_id = 0 ", deptAlias));
         }
     }
     conditions.add(dataScope);
    

    }

    // 多角色情况下，所有角色都不包含传递过来的权限字符，这个时候sqlString也会为空，所以要限制一下,不查询任何数据
    if (StringUtils.isEmpty(conditions))
    {

     sqlString.append(StringUtils.format(" OR {}.dept_id = 0 ", deptAlias));
    

    }

    if (StringUtils.isNotBlank(sqlString.toString()))
    {

     Object params = joinPoint.getArgs()[0];
     if (StringUtils.isNotNull(params) && params instanceof BaseEntity)
     {
         BaseEntity baseEntity = (BaseEntity) params;
         baseEntity.getParams().put(DATA_SCOPE, " AND (" + sqlString.substring(4) + ")");
     }
    

    }
    }

    /**

  • 拼接权限sql前先清空params.dataScope参数防止注入
    */
    private void clearDataScope(final JoinPoint joinPoint)
    {
    Object params = joinPoint.getArgs()[0];
    if (StringUtils.isNotNull(params) && params instanceof BaseEntity)
    {

     BaseEntity baseEntity = (BaseEntity) params;
     baseEntity.getParams().put(DATA_SCOPE, "");
    

    }
    }
    }