Spring boot通过切面,实现超灵活的注解式数据校验过程

public class User {
    private Long id;
    @NotBlank(message = "name不能为空")
    @Size(min = 5, max = 10, message = "字符在5到10个")
    private String name;
    private String des;
    @NotNull
    @Max(value = 3, message = "type 参数错误")
    @Min(value = 0, message = "type 参数错误")
    private Integer type;
    @Min(value = 0, message = "参数错误, limit必须大于或等于0")  
    private int limit;
    @Pattern(regexp = "^(true|false)$", message = "参数错误, 参数isActive只能是true或者false")
    private String flag;
    // setters and getters

<dependency>
   <groupId>org.hibernate</groupId>
   <artifactId>hibernate-validator-cdi</artifactId>
   <version>5.4.1.Final</version>
</dependency>
<dependency>
   <groupId>org.glassfish</groupId>
   <artifactId>javax.el</artifactId>
   <version>3.0.1-b08</version>
</dependency>

@Aspect  //一个切面
@Configuration  // spring boot 配置类
public class RequestParamValidAspect {
    private final ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
    private final ExecutableValidator methodValidator = factory.getValidator().forExecutables();
    private final Validator beanValidator = factory.getValidator();
    private <T> Set<ConstraintViolation<T>> validMethodParams(T obj, Method method, Object [] params){
        return methodValidator.validateParameters(obj, method, params);
    }
    private <T> Set<ConstraintViolation<T>> validBeanParams(T bean) {
        return beanValidator.validate(bean);
    }
    @Pointcut("execution(* com.jiaobuchong.commodity.service.*.*(..))")
    public void soaServiceBefore(){}
    /* * 通过连接点切入 */
    @Before("soaServiceBefore()")
    public void twiceAsOld1(JoinPoint point) {
        //  获得切入目标对象
        Object target = point.getThis();
        // 获得切入方法参数
        Object [] args = point.getArgs();
        // 获得切入的方法
        Method method = ((MethodSignature)point.getSignature()).getMethod();
        // 校验以基本数据类型 为方法参数的
        Set<ConstraintViolation<Object>> validResult = validMethodParams(target, method, args);
        Iterator<ConstraintViolation<Object>> violationIterator = validResult.iterator();
        while (violationIterator.hasNext()) {
            // 此处可以抛个异常提示用户参数输入格式不正确
            System.out.println("method check---------" + violationIterator.next().getMessage());
        }
        // 校验以java bean对象 为方法参数的 
        for (Object bean : args) {
            if (null != bean) {
                validResult = validBeanParams(bean);
                violationIterator = validResult.iterator();
                while (violationIterator.hasNext()) {
            // 此处可以抛个异常提示用户参数输入格式不正确
                    System.out.println("bean check-------" + violationIterator.next().getMessage());
                }
            }
        }
    }
}

// DemoService.java
public interface DemoService {
    void one(@NotNull(message = "不能为null") Integer a, @NotBlank String b);
    void two(@NotNull(message = "paramsVo不能为null") ParamsVo paramsVo,
             @NotNull(message = "go不能为null") String go);
}
// ParamsVo.java
public class ParamsVo {
    @NotBlank(message = "不能为空")
    private String name;
    @NotBlank
    @Length(min = 2, max = 20, message = "不可以为空，最多20个字")
    private String desc;
    @NotNull
    @Valid  // 需要加上@Valid注解，不然不会校验到Img对象
    private List<Img> imgList;
    @NotNull(message = "length不能为null")
    @Range(min = 3, max = 100, message = "长度范围3-100")
    private Integer length;
    // omitted other code
}
public class Img {
    @NotNull(message = "img id 不能为null")
    private Long id;
    @NotBlank(message = "img name 不能为空")
    private String name;
    // omitted other code
}

    @Autowired 
    private DemoService demoService;
    @Test
    public void testGo() {
        demoService.one(null, "");
        ParamsVo paramsVo = new ParamsVo();
        List<Img> list = new ArrayList<>();
        Img img = new Img();
        list.add(img);
        paramsVo.setImgList(list);
        paramsVo.setDesc("你");
        paramsVo.setLength(1);
        demoService.two(paramsVo, null);
    }

// Spring MVC中对下面这样的校验是没有作用的
void one(@NotNull(message = "不能为null") Integer a, @NotBlank String b);

@Retention(RetentionPolicy.RUNTIME)
public @interface DataAuthValid
{    
    //位置
    public int index() default 0;
    
    //字段   id
    //public String id() default "id";
    
    //字段   id
    public String orgId() default "org_id";
    
    //mapper
    @SuppressWarnings("rawtypes")
    public Class<? extends Mapper> mapper();
}

@Aspect
@Component
@Order(1)
public class DataAuthAop { 
    private static String types = "java.lang.String,java.lang.Long,long";    
    @Before("@annotation(dataAuth)")
    public void beforeMethod(JoinPoint point,DataAuthValid dataAuth) throws Exception {
        
        HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
        Map<String, Object> payloadMap = (Map<String, Object>) request.getAttribute("payloadMap");
        Long companyid = Long.parseLong(payloadMap.get("companyid")+"");
        if(companyid != 1) {
            Object[] args = point.getArgs();
            Object obj = args[dataAuth.index()];
            String ids = null;
            String typeName = obj.getClass().getTypeName();
            if(types.contains(typeName)) {
                ids = obj + "";
            }else {
                Field[] fields = obj.getClass().getDeclaredFields();
                for (Field f : fields) {
                    f.setAccessible(true);
                    if("id".equals(f.getName())) {
                        Long id = (Long) f.get(obj);
                        ids = id + "";
                    }
                }
            }
            String[] idArr = ids.split(",");
            for (String id : idArr) {
                Class cla = dataAuth.mapper();
                Mapper mapper = (Mapper) SpringBeanFactoryUtils.getApplicationContext().getBean(cla);
                Object object = mapper.selectByPrimaryKey(Long.valueOf(id));
                Field field = obj.getClass().getDeclaredField(dataAuth.orgId());
                field.setAccessible(true);
                Long orgId = (Long)field.get(obj);
                if(!companyid.equals(orgId)) {
                    throw new RuntimeException();
                }
            }
        }
    }
}