有关 spring boot中 jpa报错：with root cause java.lang.StringIndexOutOfBoundsException: String index out of

 

报错代码：

 

2019-02-28 11:59:27,533 - Servlet.service() for servlet [dispatcherServlet] in context with path [/zxzc] threw exception [Request processing failed; nested exception is java.lang.StringIndexOutOfBoundsException: String index out of range: 0] with root cause
java.lang.StringIndexOutOfBoundsException: String index out of range: 0
	at java.lang.String.charAt(String.java:658)
	at org.hibernate.type.descriptor.java.CharacterTypeDescriptor.wrap(CharacterTypeDescriptor.java:61)
	at org.hibernate.type.descriptor.java.CharacterTypeDescriptor.wrap(CharacterTypeDescriptor.java:16)
	at org.hibernate.type.descriptor.sql.VarcharTypeDescriptor$2.doExtract(VarcharTypeDescriptor.java:62)
	at org.hibernate.type.descriptor.sql.BasicExtractor.extract(BasicExtractor.java:47)
	at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:261)
	at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:257)
	at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:247)
	at org.hibernate.type.AbstractStandardBasicType.hydrate(AbstractStandardBasicType.java:333)
	at org.hibernate.persister.entity.AbstractEntityPersister.hydrate(AbstractEntityPersister.java:3007)
	at org.hibernate.loader.Loader.loadFromResultSet(Loader.java:1746)
	at org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1672)
	at org.hibernate.loader.Loader.getRow(Loader.java:1561)
	at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:731)
	at org.hibernate.loader.Loader.processResultSet(Loader.java:990)
	at org.hibernate.loader.Loader.doQuery(Loader.java:948)
	at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:340)
	at org.hibernate.loader.Loader.doList(Loader.java:2689)
	at org.hibernate.loader.Loader.doList(Loader.java:2672)
	at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2506)
	at org.hibernate.loader.Loader.list(Loader.java:2501)
	at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:504)
	at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:395)
	at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:220)
	at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1508)
	at org.hibernate.query.internal.AbstractProducedQuery.doList(AbstractProducedQuery.java:1537)
	at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1505)
	at org.hibernate.query.internal.AbstractProducedQuery.getSingleResult(AbstractProducedQuery.java:1553)
	at org.hibernate.query.criteria.internal.compile.CriteriaQueryTypeQueryAdapter.getSingleResult(CriteriaQueryTypeQueryAdapter.java:109)
	at org.springframework.data.jpa.repository.query.JpaQueryExecution$SingleEntityExecution.doExecute(JpaQueryExecution.java:214)
	at org.springframework.data.jpa.repository.query.JpaQueryExecution.execute(JpaQueryExecution.java:91)
	at org.springframework.data.jpa.repository.query.AbstractJpaQuery.doExecute(AbstractJpaQuery.java:136)
	at org.springframework.data.jpa.repository.query.AbstractJpaQuery.execute(AbstractJpaQuery.java:125)

解决办法：

查看自己的数据， 观察字段中是否 有char类型的数据。 当数据库中char类型为空时， 会报错

 

当把char里面数据添加上， 即可解决问题。

困扰自己老半天，最终解决了。  很开心！