Springboot+mybatis-plus+注解实现数据权限隔离

当此注解打在类上，不需要传参，该类下所有查询接口开启数据隔离；打在方法上默认开启数据隔离，传参为false则该方法关闭验证

/** * 数据权限验证注解 * @author xiaohua * @date 2021/6/23 */@Documented@Target({METHOD, ANNOTATION_TYPE, TYPE})@Retention(RUNTIME)public @interface DataPermission { /** * 是否要进行数据权限隔离 */ boolean isPermi() default true;}2. 具体实现

@Component@Intercepts({@Signature(type = StatementHandler.class, method = 'prepare', args = {Connection.class, Integer.class})})public class DataPermissionInterceptor implements Interceptor { private static final Logger logger = LoggerFactory.getLogger(DataPermissionInterceptor.class); @Autowired private TokenService tokenService; //扫描的包路径（根据自己的项目路径来），这里是取的配置里的包路径 @Value('${permission.package-path}') private String packagePath; private final static String DEPT_ID = 'dept_id'; private final static String USER_ID = 'create_user'; private static List<String> classNames; @Override public Object intercept(Invocation invocation) throws Throwable {try { LoginInfo user = tokenService.getLoginInfo(); if (user == null){return invocation.proceed(); } List<Long> deptIds = (List<Long>) Convert.toList(user.getDataScope()); if (deptIds == null){deptIds = new ArrayList<>(); } //反射扫包会比较慢，这里做了个懒加载 if (classNames == null) {synchronized (LazyInit.class){ if (classNames == null){//扫描指定包路径下所有包含指定注解的类Set<Class<?>> classSet = ClassUtil.scanPackageByAnnotation(packagePath, DataPermission.class);if (classSet == null && classSet.size() == 0){ classNames = new ArrayList<>();} else { //取得类全名 classNames = classSet.stream().map(Class::getName).collect(Collectors.toList());} }} } // 拿到mybatis的一些对象 StatementHandler statementHandler = PluginUtils.realTarget(invocation.getTarget()); MetaObject metaObject = SystemMetaObject.forObject(statementHandler); MappedStatement mappedStatement = (MappedStatement) metaObject.getValue('delegate.mappedStatement'); // mappedStatement.getId()为执行的mapper方法的全路径名,newId为执行的mapper方法的类全名 String newId = mappedStatement.getId().substring(0, mappedStatement.getId().lastIndexOf('.')); // 如果不是指定的方法，直接结束拦截 if (!classNames.contains(newId)) {return invocation.proceed(); } String newName = mappedStatement.getId().substring(mappedStatement.getId().lastIndexOf('.') + 1, mappedStatement.getId().length()); //是否开启数据权限 boolean isPermi = true; Class<?> clazz = Class.forName(newId); //遍历方法 for (Method method : clazz.getDeclaredMethods()) {//方法是否含有DataPermission注解，如果含有注解则将数据结果过滤if (method.isAnnotationPresent(DataPermission.class) && newName.equals(method.getName())) { DataPermission dataPermission = method.getAnnotation(DataPermission.class); if (dataPermission != null) {//不验证if (!dataPermission.isPermi()) { isPermi = false;} else { //开启验证 isPermi = true;} }} } if (isPermi){// 获取到原始sql语句String sql = statementHandler.getBoundSql().getSql();// 解析并返回新的SQL语句，只处理查询sqlif (mappedStatement.getSqlCommandType().toString().equals('SELECT')) { // String newSql = getNewSql(sql,deptIds,user.getUserId()); sql = getSql(sql,deptIds,user.getUserId());}// 修改sqlmetaObject.setValue('delegate.boundSql.sql', sql); } return invocation.proceed();} catch (Exception e){ logger.error('数据权限隔离异常：', e); return invocation.proceed();} } /** * 解析SQL语句，并返回新的SQL语句 * 注意，该方法使用了JSqlParser来操作SQL，该依赖包Mybatis-plus已经集成了。如果要单独使用，请先自行导入依赖 * * @param sql 原SQL * @return 新SQL */ private String getSql(String sql,List<Long> deptIds,Long userId) {try { String condition = ''; String permissionSql = '('; if (deptIds.size() > 0){for (Long deptId : deptIds) { if ('('.equals(permissionSql)){permissionSql = permissionSql + deptId; } else {permissionSql = permissionSql + ',' + deptId; }}permissionSql = permissionSql + ')';// 修改原语句condition = DEPT_ID +' in ' + permissionSql; } else {condition = USER_ID +' = ' + userId; } if (StringUtils.isBlank(condition)){return sql; } Select select = (Select)CCJSqlParserUtil.parse(sql); PlainSelect plainSelect = (PlainSelect)select.getSelectBody(); //取得原SQL的where条件 final Expression expression = plainSelect.getWhere(); //增加新的where条件 final Expression envCondition = CCJSqlParserUtil.parseCondExpression(condition); if (expression == null) {plainSelect.setWhere(envCondition); } else {AndExpression andExpression = new AndExpression(expression, envCondition);plainSelect.setWhere(andExpression); } return plainSelect.toString();} catch (JSQLParserException e) { logger.error('解析原SQL并构建新SQL错误：' + e); return sql;} }

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