目前我有一个
spring启动应用程序和POJO验证我正在使用
javax验证器.我们在应用程序中有rest apis.
我的问题是:如何为相同类型的单独字段分别显示错误消息.
示例说明:参考下面的示例代码:如果a1.name不存在则有单独的错误消息(ERROR1),如果a2.name不存在则有单独的错误消息(ERROR2)
我的POJO,使用javax验证器注释看起来像:
public class A{
@NotNull
private String name;
@NotNull
private String age;
//..getters and setters
}
public class B{
@Valid
private A a1;
@Valid
private A a2;
}
我的休息控制器看起来像:
@RestController
public class Controller1{
@GetMapping(value="/abc")
public void api1(@Valid @RequestBody B b){...}
}
我试图使用组但javax @valid annotaion不支持组.
我尝试使用spring @Validated注释的另一个选项,但问题是它不能应用于字段.
最佳答案 据我所知,Bean验证组不是为满足此用例而设计的.
如果你这样调用你的REST服务:
curl -i -H "Accept: application/json" -H "Content-Type: application/json" -X GET -d '{"a1":{}, "a2":{}}}' http://localhost:8080/abc
回应是:
{
"timestamp":"2017-11-10T17:22:07.534+0000",
"status":400,
"error":"Bad Request",
"exception":"org.springframework.web.bind.MethodArgumentNotValidException",
"errors":[
{
"codes":["NotNull.b.a1.name", "NotNull.a1.name", "NotNull.name", "NotNull.java.lang.String", "NotNull"],
"arguments":[
{
"codes":["b.a1.name", "a1.name" ],
"arguments":null,
"defaultMessage":"a1.name",
"code":"a1.name"
}
],
"defaultMessage":"may not be null",
"objectName":"b",
"field":"a1.name",
"rejectedValue":null,
"bindingFailure":false,
"code":"NotNull"
},
{
"codes":["NotNull.b.a2.age", "NotNull.a2.age", "NotNull.age", "NotNull.java.lang.String", "NotNull"],
"arguments":[
{
"codes":[ "b.a2.age", "a2.age"],
"arguments":null,
"defaultMessage":"a2.age",
"code":"a2.age"
}
],
"defaultMessage":"may not be null",
"objectName":"b",
"field":"a2.age",
"rejectedValue":null,
"bindingFailure":false,
"code":"NotNull"
},
{
"codes":[ "NotNull.b.a1.age", "NotNull.a1.age", "NotNull.age", "NotNull.java.lang.String", "NotNull"],
"arguments":[
{
"codes":["b.a1.age", "a1.age"],
"arguments":null,
"defaultMessage":"a1.age",
"code":"a1.age"
}
],
"defaultMessage":"may not be null",
"objectName":"b",
"field":"a1.age",
"rejectedValue":null,
"bindingFailure":false,
"code":"NotNull"
},
{
"codes":["NotNull.b.a2.name", "NotNull.a2.name", "NotNull.name", "NotNull.java.lang.String", "NotNull"],
"arguments":[
{
"codes":["b.a2.name", "a2.name"],
"arguments":null,
"defaultMessage":"a2.name",
"code":"a2.name"
}
],
"defaultMessage":"may not be null",
"objectName":"b",
"field":"a2.name",
"rejectedValue":null,
"bindingFailure":false,
"code":"NotNull"
}
],
"message":"Validation failed for object='b'. Error count: 4",
"path":"/api/profile/abc"
}
如果仔细观察,您会看到响应表明您得到了四个验证错误,并且每个验证错误都有约束,对象和目标字段等验证详细信息,例如:NotNull.b.a1.name.
视图(REST客户端)负责插入此详细响应以显示相应的验证消息.
有时,它不是在客户端插入消息的选项.在这种情况下,您可以使用Spring添加自定义“验证错误”处理程序.像这样的东西:
@RestController
public class Controller1 {
// This assumes that Spring i18n is properly configured
@Autowired
private MessageSource messageSource;
@ExceptionHandler(MethodArgumentNotValidException.class)
@ResponseStatus(HttpStatus.BAD_REQUEST)
@ResponseBody
public Map<String, String> processValidationError(MethodArgumentNotValidException ex) {
BindingResult result = ex.getBindingResult();
List<FieldError> fieldErrors = result.getFieldErrors();
Map<String, String> errors = new HashMap<>();
for (FieldError fieldError: fieldErrors) {
String fieldPath = fieldError.getField();
String messageCode = fieldError.getCode() + "." + fieldPath;
String validationMessage = messageSource.getMessage(messageCode, new Object[]{fieldError.getRejectedValue()}, Locale.getDefault());
// add the validation message, for example "NotNull.a1.name" => "a should not be null"
errors.put(fieldError.getField(), validationMessage);
}
return errors;
}
@GetMapping(value="/abc")
public void api1(@Valid @RequestBody B b){
//...
}
}