我正在尝试在 Spring 中使用 @RequestBody @Valid 注释来进行 bean 验证和数据映射。
正如您在实体 bean 中看到的，我正在使用 @NotNull 和 @Min 注释，它们都使用不同的验证消息，我可以在控制器中的BindingResult参数处读取此消息。
但是，当客户端为“operatorId”字段发送字符串值而不是long时，我收到一个错误，您可以在下面看到它。
我的问题是：
当客户端为 operatorId 设置非数字字符串值时，我想向客户端返回错误消息文本。（例如：“您应该发送一个数值等”）
实体豆：
@Entity(name="ua")
@Table(name="ua")
public class UserAgreement extends BaseContractEntity {
@Column(name = "OPERATOR_ID")
@NotNull(message = "operatorId must be provided")
@Min(value = 1, message = "operatorId must be bigger then zero")
protected long operatorId;
//... getters setters, etc
}
控制器 ：
@RequestMapping(value = "/ug", method = RequestMethod.POST)
@ResponseBody
public ServiceResponse saveUserAgreement(@RequestBody @Valid UserAgreement userAgreement,
BindingResult result) {
ServiceResponse serviceResponse = new ServiceResponse();
if(result.hasErrors()) {
serviceResponse.setMessage(result.getAllErrors().get(0).getDefaultMessage());
serviceResponse.setErrorCode("400");
return serviceResponse;
} else {
// call service
serviceResponse.setMessage("ok");
return serviceResponse;
}
}
这是我的示例请求：
当使用此 json 文本发出 POST 请求时（错误的 operatorId 非数字值！）：
{"content":"text content text","announcement":"YES","approved":"YES","operatorId":"5fg0"}
收到此错误：
org.springframework.http.converter.HttpMessageNotReadableException: Could not read JSON: Can not construct instance of long from String value '5fg0': not a valid Long value
at [Source: org.apache.catalina.connector.CoyoteInputStream@9ba3afe; line: 1, column: 69] (through reference chain: com.ggg.agr.core.model.UserAgreement["operatorId"]); nested exception is org.codehaus.jackson.map.JsonMappingException: Can not construct instance of long from String value '5fg0': not a valid Long value
at [Source: org.apache.catalina.connector.CoyoteInputStream@9ba3afe; line: 1, column: 69] (through reference chain: com.ggg.agr.core.model.UserAgreement["operatorId"])
at org.springframework.http.converter.json.MappingJacksonHttpMessageConverter.readJavaType(MappingJacksonHttpMessageConverter.java:169)
at org.springframework.http.converter.json.MappingJacksonHttpMessageConverter.read(MappingJacksonHttpMessageConverter.java:161)
at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver.readWithMessageConverters(AbstractMessageConverterMethodArgumentResolver.java:135)
at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.readWithMessageConverters(RequestResponseBodyMethodProcessor.java:180)
at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.resolveArgument(RequestResponseBodyMethodProcessor.java:95)
at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:77)
at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:162)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:123)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:838)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:680)
Caused by: org.codehaus.jackson.map.JsonMappingException: Can not construct instance of long from String value '5fg0': not a valid Long value
at [Source: org.apache.catalina.connector.CoyoteInputStream@9ba3afe; line: 1, column: 69] (through reference chain: com.ggg.agr.core.model.UserAgreement["operatorId"])
at org.codehaus.jackson.map.JsonMappingException.from(JsonMappingException.java:163)
at org.codehaus.jackson.map.deser.StdDeserializationContext.weirdStringException(StdDeserializationContext.java:243)
at org.codehaus.jackson.map.deser.std.StdDeserializer._parseLong(StdDeserializer.java:351)
at org.codehaus.jackson.map.deser.std.StdDeserializer$LongDeserializer.deserialize(StdDeserializer.java:846)
at org.codehaus.jackson.map.deser.std.StdDeserializer$LongDeserializer.deserialize(StdDeserializer.java:833)
at org.codehaus.jackson.map.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:299)
at org.codehaus.jackson.map.deser.SettableBeanProperty$MethodProperty.deserializeAndSet(SettableBeanProperty.java:414)
at org.codehaus.jackson.map.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:697)
at org.codehaus.jackson.map.deser.BeanDeserializer.deserialize(BeanDeserializer.java:580)
at org.codehaus.jackson.map.ObjectMapper._readMapAndClose(ObjectMapper.java:2732)
at org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:1923)
at org.springframework.http.converter.json.MappingJacksonHttpMessageConverter.readJavaType(MappingJacksonHttpMessageConverter.java:166)
... 38 more