Spring Annotations validated

Disclaimer: This article is a blogger original article, follow the CC 4.0 BY-SA copyright agreement, reproduced, please attach the original source link and this statement.

This link: https://blog.csdn.net/weixin_44018338/article/details/99972950

spring-boot may be used @validated check data, if the data exception thrown will be unified, convenient unitary anomaly centers.
For example, we determine the legality of an input parameter, can be used as follows

Use a foundation

Because the spring-boot basic package has been introduced, it can be used directly of
a statement on the first data validation controller needs

@RequestMapping(value="/url.json",method= {RequestMethod.POST})
@ResponseBody
@Transactional
public Result<?> xxmethod( @RequestBody @Validated  XoPO xoPo)     
    throws ParseException, UnsupportedEncodingException {}

2 then the field is declared to be verified on the bean

@data
public class XoPO{
    
    @validated
    private List<OrderPerson> personList;
    
    @NotNull
    @Size(max=32,message="code is null")
    private String code;

    @NotBlank
    @Size(max=32,message="product is null")
    private String product;
}

Then, when the input conditions are not met, the exception is thrown, then unified by the abnormal processing center
can also be used BindingResult, but after using this manual must handle exceptions, invade normal logical process, not recommended

Two common types of annotations

Be careful not to misuse the exception type, such as int is not available on @size

Common annotated as follows

@AssertFalse 校验false
@AssertTrue 校验true
@DecimalMax(value=,inclusive=) 小于等于value，
inclusive=true,是小于等于
@DecimalMin(value=,inclusive=) 与上类似
@Max(value=) 小于等于value
@Min(value=) 大于等于value
@NotNull  检查Null
@Past  检查日期
@Pattern(regex=,flag=)  正则
@Size(min=, max=)  字符串，集合，map限制大小
@Validate 对po实体类进行校验

Three nested parity

If a class contains another entity class, it can be added on top @Validated, such as the above

 public class XoPO {    
    @validated
    private List<PersonDetailPO> personList;
 }

Four @pathvariable check

spring-boot may not currently support the validation of parameters: HTTPS: //jira.spring.io/browse ...

public Result<?> xoById( @NotNull @NotBlank @Size(min=10,max=32)@PathVariable(value="accountId") String id) {}

But there is not an exception is thrown, possibly resolve in the next version of the spring, or do not @Pathvariable, while in the service

Class XoService{
   public xoMethon( @NotNull String id){
   }
}

To solve

[Reserved] https://segmentfault.com/a/1190000011712893