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enum 如何做數(shù)據(jù)綁定呢？

/**
?*?性別|[0(SexType.FEMALE):女；1(SexType.MALE):男]
?*/
@ApiModelProperty(value?=?"性別|[0:女；1:男]",?example?=?"0")
@Column(name?=?"sex",?length?=?1)
@Enumerated(EnumType.STRING)
private?SexType?sex;

/**
?*?性別類型
?*
?*?@author?zhangjiao?2018/1/20
?*/
public?enum?SexType?{

????/**
?????*?女
?????*/
????FEMALE,
????/**
?????*?男
?????*/
????MALE
}

綁定報(bào)如下錯(cuò)：
org.springframework.http.converter.HttpMessageNotReadableException:?JSON?parse?error:?Can?not?construct?instance?of?java.lang.Enum:?abstract?types?either?need?to?be?mapped?to?concrete?types,?have?custom?deserializer,?or?contain?additional?type?information;?nested?exception?is?com.fasterxml.jackson.databind.JsonMappingException:?Can?not?construct?instance?of?java.lang.Enum:?abstract?types?either?need?to?be?mapped?to?concrete?types,?have?custom?deserializer,?or?contain?additional?type?information
?at?[Source:?org.apache.catalina.connector.CoyoteInputStream@770346bc;?line:?5,?column:?23]?(through?reference?chain:?com.etrols.user.entity.User["lastLoginIdentity"])
	at?org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:238)
	at?org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readInternal(AbstractJackson2HttpMessageConverter.java:215)
	at?org.springframework.http.converter.AbstractHttpMessageConverter.read(AbstractHttpMessageConverter.java:193)
	at?org.springframework.data.rest.webmvc.config.PersistentEntityResourceHandlerMethodArgumentResolver.read(PersistentEntityResourceHandlerMethodArgumentResolver.java:236)
	at?org.springframework.data.rest.webmvc.config.PersistentEntityResourceHandlerMethodArgumentResolver.read(PersistentEntityResourceHandlerMethodArgumentResolver.java:193)
	at?org.springframework.data.rest.webmvc.config.PersistentEntityResourceHandlerMethodArgumentResolver.resolveArgument(PersistentEntityResourceHandlerMethodArgumentResolver.java:141)
	at?org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:121)
	at?org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:158)
	at?org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:128)
	at?org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
	at?org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
	at?org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
	at?org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
	at?org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
	at?org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
	at?org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
	at?org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
	at?javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
	at?org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
	at?javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	at?org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at?org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at?org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at?org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at?org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at?org.springframework.boot.web.filter.ApplicationContextHeaderFilter.doFilterInternal(ApplicationContextHeaderFilter.java:55)
	at?org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at?org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at?org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at?com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:123)
	at?org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at?org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at?org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:110)
	at?org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at?org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at?org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at?org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	at?org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at?org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at?org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at?org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:108)
	at?org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at?org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at?org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at?org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)
	at?org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at?org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at?org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at?org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
	at?org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at?org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at?org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at?org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:106)
	at?org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at?org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at?org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at?org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
	at?org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at?org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478)
	at?org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
	at?org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
	at?org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
	at?org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
	at?org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)
	at?org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at?org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
	at?org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459)
	at?org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at?java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at?java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at?org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at?java.lang.Thread.run(Thread.java:748)
Caused?by:?com.fasterxml.jackson.databind.JsonMappingException:?Can?not?construct?instance?of?java.lang.Enum:?abstract?types?either?need?to?be?mapped?to?concrete?types,?have?custom?deserializer,?or?contain?additional?type?information
?at?[Source:?org.apache.catalina.connector.CoyoteInputStream@770346bc;?line:?5,?column:?23]?(through?reference?chain:?com.etrols.user.entity.User["lastLoginIdentity"])
	at?com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:270)
	at?com.fasterxml.jackson.databind.DeserializationContext.instantiationException(DeserializationContext.java:1456)
	at?com.fasterxml.jackson.databind.DeserializationContext.handleMissingInstantiator(DeserializationContext.java:1012)
	at?com.fasterxml.jackson.databind.deser.AbstractDeserializer.deserialize(AbstractDeserializer.java:216)
	at?com.fasterxml.jackson.databind.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:504)
	at?com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeWithErrorWrapping(BeanDeserializer.java:511)
	at?com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeUsingPropertyBased(BeanDeserializer.java:400)
	at?com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromObjectUsingNonDefault(BeanDeserializerBase.java:1191)
	at?com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:314)
	at?com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:148)
	at?com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3814)
	at?com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2938)
	at?org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:235)
	...?71?more

花開北海

2018-01-21

源自：SpringMVC數(shù)據(jù)綁定入門 3-3

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1 回答

慕容6212989
2018-01-29

給枚舉賦值? 然後

自定義一個(gè) getValue()方法，

并且寫一個(gè)構(gòu)造器? this傳參數(shù)

public enum AccountStateEnum {
??? /**賬戶狀態(tài)-新建*/
??? NEW("1")
??? /**賬戶狀態(tài)-開戶*/
??? , OPEN("2")
??? /**賬戶狀態(tài)-變更*/
??? , CHANGED("3")
??? /**賬戶狀態(tài)-凍結(jié)*/
??? , FREEZED("4")
??? /**賬戶狀態(tài)-銷戶*/
??? , TERMINATED("5");

??? private String accountState;

??? AccountStateEnum(String accountState) {
??????? this.accountState = accountState;
??? }

??? @Override
??? public String getValue() {
??????? return this.accountState;
??? }