Java 类级验证问题

我正在尝试验证几个字段。如果两者都包含无效字符，我需要输出一条错误消息

我正在尝试使用类级验证。但是，在运行单元测试时，我遇到了NoTouchElement异常

正在验证的类：

@JsonIgnoreProperties(ignoreUnknown = true)
@TwoFieldPattern(accountNumber = "accountNumber", sortCode = "sortCode")
public class AccountDetails {

    @Pattern(regexp = "^[-0-9]*$", message="Fields contain invalid characters: account number '${validatedValue}'")
    private String accountNumber;

    @Pattern(regexp = "^[-0-9]*$", message="Fields contain invalid characters: sort code '${validatedValue}'")
    @NotBlank
    private String sortCode;

    public AccountDetails() {}

    public String getSortCode() {
        return sortCode;
    }

    public void setSortCode(String sortCode) {
        this.sortCode = sortCode;
    }

    public String getAccountNumber() {
        return accountNumber;
    }

    public void setAccountNumber(String accountNumber) {
        this.accountNumber = accountNumber;
    }
}

验证类：

@Target(TYPE)
@Retention(RUNTIME)
@Constraint(validatedBy = TwoFieldPatternValidator.class)
public @interface TwoFieldPattern {

    String message() default "Fields contain invalid characters: account number '${validatedValue.accountNumber}', sort code '${validatedValue.sortCode}";

    String accountNumber();

    String sortCode();

    Class<?>[] groups() default {};

    Class<? extends Payload>[] payload() default {};
}

public class TwoFieldPatternValidator implements ConstraintValidator<TwoFieldPattern, Object> {

    @Override
    public boolean isValid(Object obj, ConstraintValidatorContext cvc) {
        AccountDetails account = (AccountDetails) obj;
        return (!account.getAccountNumber().matches("^[-0-9]*$")&& !account.getSortCode().matches("^[-0-9]*$"));
    }
}

@ControllerAdvice
public class ExceptionHandler extends ResponseEntityExceptionHandler {

    @Override
    protected ResponseEntity<Object> handleMethodArgumentNotValid(MethodArgumentNotValidException ex,
                                                                  HttpHeaders headers,
                                                                  HttpStatus status, WebRequest request) {

        String errorMessage = ex.getBindingResult()
                .getFieldErrors()
                .stream()
                .findFirst()
                .map(FieldError::getDefaultMessage)
                .get();

        final BankDetailsValidationModel validationResult = new BankDetailsValidationModel(false, false, errorMessage, "");
        return ResponseEntity.status(HttpStatus.UNPROCESSABLE_ENTITY).body(validationResult);
    }
}

@Target（类型）
@保留（运行时）
@约束（validatedBy=TwoFieldPatternValidator.class）
公共@接口模式{
String message（）默认值“字段包含无效字符：帐号“${validatedValue.accountNumber}”，排序代码“${validatedValue.sortCode}”；
字符串accountNumber（）；
字符串sortCode（）；
类[]组（）默认值{}；
类假设到目前为止您的“类验证器”设置正确，异常堆栈跟踪会将您指向
handleMethodArgumentNotValid（）
方法-调用（
可选。
）
get
，让我们假设
getFieldErrors（）
为空

由于它是一个“类vlaidator”，它不是由
fieldErrors
提供的，但是我们在
allErrors
（）中“更幸运”

这将引导您找到一个：

无法将“org.springframework.validation.beanvalidation.SpringValidatorAdapter$ViolationObjectError”强制转换为“org.springframework.validation.beanvalidation.SpringValidatorAdapter$ViolationFieldError”

可以通过将
字段错误：getDefaultMessage
替换为
错误：getDefaultMessage
（+fix imports）来修复此问题

找不到局部变量“ex”

与原始帖子不一致…可能是您在重构时弄坏了某些东西。（编译器消息相当于“变量'ex'未声明”）
您尝试过吗？…至少对于调试BindingResult。-
getErrorCount、hasErrors、hasFieldErrors、hasGlobalErrors
似乎很有用。（…也许你会发现，
Error:getDefaultMessage
比
FieldError:…
效果很好，谢谢！我仍然看到
（（ViolationFieldError）（（java.util.LinkedList）（（BeanPropertyBindingResult）ex.bindingResult）。错误。get（0））.violation=无法将“org.springframework.validation.beanvalidation.SpringValidatorAdapter$ViolationObjectError”强制转换为“org.springframework.validation.beanvalidation.SpringValidatorAdapter$ViolationFieldError”
（ViolationFieldError）（（java.util.LinkedList）（（BeanPropertyBindingResult）ex.bindingResult）。错误）。获取（0））.violation=在TwoFieldPatternValidator中找不到局部变量“ex”

。“无法强制转换”（重新阅读我的第二条评论）：将

FieldError:getDefaultMessage

替换为

Error:getDefaultMessage

“找不到局部变量“ex””对于发布的代码来说有点奇怪/意外（修复了吗？）Thaks！我完全没有注意到类验证器没有字段错误。帮了大忙！

java.util.NoSuchElementException: No value present
    at java.base/java.util.Optional.get(Optional.java:148) ~[na:na]
    at uk.co.cdl.account.bankdetailsvalidation.service.controller.ExceptionHandler.handleMethodArgumentNotValid(ExceptionHandler.java:27) ~[classes/:na]
    at org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler.handleException(ResponseEntityExceptionHandler.java:168) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver.doResolveHandlerMethodException(ExceptionHandlerExceptionResolver.java:412) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.servlet.handler.AbstractHandlerMethodExceptionResolver.doResolveException(AbstractHandlerMethodExceptionResolver.java:61) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.servlet.handler.AbstractHandlerExceptionResolver.resolveException(AbstractHandlerExceptionResolver.java:140) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.servlet.handler.HandlerExceptionResolverComposite.resolveException(HandlerExceptionResolverComposite.java:79) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.processHandlerException(DispatcherServlet.java:1298) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1110) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1056) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:665) ~[javax.servlet-api-4.0.1.jar:4.0.1]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:750) ~[javax.servlet-api-4.0.1.jar:4.0.1]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.springframework.boot.actuate.web.trace.servlet.HttpTraceFilter.doFilterInternal(HttpTraceFilter.java:88) ~[spring-boot-actuator-2.1.8.RELEASE.jar:2.1.8.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:114) ~[spring-boot-actuator-2.1.8.RELEASE.jar:2.1.8.RELEASE]
    at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:104) ~[spring-boot-actuator-2.1.8.RELEASE.jar:2.1.8.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:860) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1587) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
    at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

2020-03-07 11:26:04.187  WARN 21456 --- [o-auto-1-exec-1] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.web.bind.MethodArgumentNotValidException: Validation failed for argument [0] in public org.springframework.http.ResponseEntity<uk.co.cdl.account.bankdetailsvalidation.model.BankDetailsValidationModel> uk.co.cdl.account.bankdetailsvalidation.service.controller.BankDetailsValidatorController.validate(uk.co.cdl.account.bankdetailsvalidation.model.AccountDetails): [Error in object 'accountDetails': codes [TwoFieldPattern.accountDetails,TwoFieldPattern]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [accountDetails.,]; arguments []; default message [],accountNumber,sortCode]; default message [Fields contain invalid characters: account number '15764273', sort code '938063]] ]

org.opentest4j.AssertionFailedError: 
Expected :422
Actual   :400