-
2021-06-09 17:42:33
java.lang.ClassCaption: java.lang.Long cannot be cast to java.lang.String
问题背景
service传参调用mapper，报错：
[09 17:56:54,707 DEBUG] [http-nio-8081-exec-9] handler.SimpleMappingExceptionResolver - Resolving to view 'WEB-INF/500' for exception of type [java.lang.ClassCastException], based on exception mapping [java.lang.Throwable]
[09 17:56:54,707 DEBUG] [http-nio-8081-exec-9] handler.SimpleMappingExceptionResolver - Exposing Exception as model attribute 'exception'
[09 17:56:54,707 DEBUG] [http-nio-8081-exec-9] servlet.DispatcherServlet - Handler execution resulted in exception - forwarding to resolved error view: ModelAndView: reference to view with name 'WEB-INF/500'; model is {exception=java.lang.ClassCastException: java.lang.Long cannot be cast to java.lang.String}
java.lang.ClassCastException: java.lang.Long cannot be cast to java.lang.String//加判断，如果已经使用，无法删除 Map<String, String> template = detectionTemplateMapper.queryTypeById(id);
//查询异常工单是否使用 if(adminOrderMapper.findCountByDetection(template.get("id").toString(),template.get("detectionType"))>0){ return 0; }<select id="queryTypeById" resultType="java.util.HashMap"> SELECT id,detectionType,ordernum,isSingle,isMainType,remark from work_detection_template where id=#{0} </select>问题分析
因为查询的id数据库是int类型，返回结果为Long类型，所以想着toString即可，结果还是报错，改为String.valueOf()后不报错了。
问题总结
转换字符串，尽量使用valueOf()方法吧
/** * Returns the string representation of the {@code Object} argument. * * @param obj an {@code Object}. * @return if the argument is {@code null}, then a string equal to * {@code "null"}; otherwise, the value of * {@code obj.toString()} is returned. * @see java.lang.Object#toString() */ public static String valueOf(Object obj) { return (obj == null) ? "null" : obj.toString(); }更多相关内容 -
Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass
2022-01-19 21:12:30Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) throws java.lang.ClassFormatError accessible: module ...展开全文Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) throws java.lang.ClassFormatError accessible: module java.base does not “opens java.lang” to unnamed module @1ba9117e
在将一个 JDK 8 的项目转移到 JDK 11 的运行环境中时，遇到了如下的问题：
Caused by: java.lang.IllegalStateException: Failed to create adaptive instance: java.lang.IllegalStateException: Can't create adaptive extension interface org.apache.dubbo.rpc.Protocol, cause: Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @1ba9117e at org.apache.dubbo.common.extension.ExtensionLoader.getAdaptiveExtension(ExtensionLoader.java:592) at org.apache.dubbo.config.ServiceConfig.<clinit>(ServiceConfig.java:118) ... 31 common frames omitted Caused by: java.lang.IllegalStateException: Can't create adaptive extension interface org.apache.dubbo.rpc.Protocol, cause: Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @1ba9117e at org.apache.dubbo.common.extension.ExtensionLoader.createAdaptiveExtension(ExtensionLoader.java:1021) at org.apache.dubbo.common.extension.ExtensionLoader.getAdaptiveExtension(ExtensionLoader.java:588) ... 32 common frames omitted这是由于 JDK 8 中有关反射相关的功能自从 JDK 9 开始就已经被限制了，为了兼容原先的版本，需要在运行项目时添加
--add-opens java.base/java.lang=ALL-UNNAMED选项来开启这种默认不被允许的行为。
如果是通过 IDEA 来运行项目，那么可以在 “Edit Configurations” 中 ——> “VM options” 输入框中输入该选项来完成，最终结果如下图所示：
除了添加选项启动选项之外，由于原本的项目是在 JDK 8 的环境中运行的，此时需要将运行的 JDK 转变为 JDK 11，具体做法（仅针对 Maven 项目）：将父
pom.xml文件中的<java.version>标签中的 java 版本修改为需要运行的版本，具体如下所示：<properties> <java.version>11</java.version> </properties>
-
无法将java.lang.String字段设置为java.lang.String
2021-03-09 07:33:04745) Caused by: java.lang.IllegalArgumentException: Can not set java.lang.String field nl.marcusink.mmo.server.database.table.User.username to java.lang.String at sun.reflect.UnsafeFieldAccessorImpl....展开全文我目前正在开发带有套接字服务器的小型MMO应用程序.我使用的数据库是PostgreSQL,而我使用的是Hibernate ORM.
当请求一个用户拥有的所有头像时,我偶然发现了一个例外.
我参与了3个班级的学习,分别是：
> GameServerClient
>数据库
>数据库查询
当用户(客户端应用程序)通过套接字向服务器发送请求时,将调用一个方法,该方法应返回所有头像的JsonString.
但是,使用来自UserOwnsAvatar的HQL查询(其中user =：username)并将结果放入UserOwnsAvatar对象的ArrayList中,它将返回无法设置的java.lang.String字段nl.marcusink.mmo.server.database.table.User .username到java.lang.String
完整的stackTrace是：
org.hibernate.property.access.spi.PropertyAccessException: Error accessing field [private java.lang.String nl.marcusink.mmo.server.database.table.User.username] by reflection for persistent property [nl.marcusink.mmo.server.database.table.User#username] : Mjollnir94
at org.hibernate.property.access.spi.GetterFieldImpl.get(GetterFieldImpl.java:43)
at org.hibernate.tuple.entity.AbstractEntityTuplizer.getIdentifier(AbstractEntityTuplizer.java:223)
at org.hibernate.persister.entity.AbstractEntityPersister.getIdentifier(AbstractEntityPersister.java:4594)
at org.hibernate.type.EntityType.toLoggableString(EntityType.java:505)
at org.hibernate.internal.util.EntityPrinter.toString(EntityPrinter.java:87)
at org.hibernate.engine.spi.QueryParameters.traceParameters(QueryParameters.java:281)
at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:194)
at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1268)
at org.hibernate.internal.QueryImpl.list(QueryImpl.java:87)
at nl.marcusink.mmo.server.database.Database$Queries.avatarsRequest(Database.java:134)
at nl.marcusink.mmo.server.connection.GameServerClient.run(GameServerClient.java:91)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalArgumentException: Can not set java.lang.String field nl.marcusink.mmo.server.database.table.User.username to java.lang.String
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:167)
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:171)
at sun.reflect.UnsafeFieldAccessorImpl.ensureObj(UnsafeFieldAccessorImpl.java:58)
at sun.reflect.UnsafeObjectFieldAccessorImpl.get(UnsafeObjectFieldAccessorImpl.java:36)
at java.lang.reflect.Field.get(Field.java:393)
at org.hibernate.property.access.spi.GetterFieldImpl.get(GetterFieldImpl.java:39)
... 11 more
查询代码为：
Query query = session.createQuery("from UserOwnsAvatar where user = :username");
query.setParameter("username", username);
ArrayList ownedAvatars = (ArrayList) query.list();
最后一行是错误的原因,有什么想法吗？
编辑
@Id
@ManyToOne(targetEntity = User.class)
@JoinColumn(name = "username", nullable = false)
private User user;
@Id
@OneToOne(targetEntity = Avatar.class)
@JoinColumn(name = "avatar", nullable = false, unique = true)
private Avatar avatar;
这里的用户名等于User对象的用户名,即：
@Id
@Column(name = "username", unique = true, nullable = false)
private String username;
解决方法:
您将必须设置完整(或仅具有相关字段的对象),而不是该对象的一个特定值.
我了解的是您正在尝试在设置参数时设置字符串,但是列的类型为User. Hibernate试图在String上调用getUsername方法,这就是错误的原因.
因此,将您的代码更改为如下所示：
User user = getSomeUser();
Query query = session.createQuery("from UserOwnsAvatar where user.username = :username");
query.setParameter("username", user);
标签：sockets,server,hibernate,java
来源： https://codeday.me/bug/20191119/2036948.html
-
解决：java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
2020-05-14 22:48:18java.lang.RuntimeException: java.lang.reflect.InvocationTargetException at tk.mybatis.spring.mapper.SpringBootBindUtilSpringBoot2Bind.bind(SpringBootBindUtil.java:129) [mapper−spring−boot−...展开全文报错信息
java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at tk.mybatis.spring.mapper.SpringBootBindUtil S p r i n g B o o t 2 B i n d . b i n d ( S p r i n g B o o t B i n d U t i l . j a v a : 129 ) [ m a p p e r − s p r i n g − b o o t − a u t o c o n f i g u r e − 1.2.3. j a r : n a ] a t t k . m y b a t i s . s p r i n g . m a p p e r . S p r i n g B o o t B i n d U t i l . b i n d ( S p r i n g B o o t B i n d U t i l . j a v a : 58 ) [ m a p p e r − s p r i n g − b o o t − a u t o c o n f i g u r e − 1.2.3. j a r : n a ] a t t k . m y b a t i s . s p r i n g . m a p p e r . C l a s s P a t h M a p p e r S c a n n e r . s e t M a p p e r P r o p e r t i e s ( C l a s s P a t h M a p p e r S c a n n e r . j a v a : 48 ) [ m a p p e r − s p r i n g − b o o t − a u t o c o n f i g u r e − 1.2.3. j a r : n a ] a t t k . m y b a t i s . s p r i n g . a n n o t a t i o n . M a p p e r S c a n n e r R e g i s t r a r . r e g i s t e r B e a n D e f i n i t i o n s ( M a p p e r S c a n n e r R e g i s t r a r . j a v a : 33 ) [ m a p p e r − s p r i n g − b o o t − a u t o c o n f i g u r e − 1.2.3. j a r : n a ] a t o r g . s p r i n g f r a m e w o r k . c o n t e x t . a n n o t a t i o n . C o n f i g u r a t i o n C l a s s B e a n D e f i n i t i o n R e a d e r . l a m b d a SpringBoot2Bind.bind(SpringBootBindUtil.java:129) ~[mapper-spring-boot-autoconfigure-1.2.3.jar:na] at tk.mybatis.spring.mapper.SpringBootBindUtil.bind(SpringBootBindUtil.java:58) ~[mapper-spring-boot-autoconfigure-1.2.3.jar:na] at tk.mybatis.spring.mapper.ClassPathMapperScanner.setMapperProperties(ClassPathMapperScanner.java:48) ~[mapper-spring-boot-autoconfigure-1.2.3.jar:na] at tk.mybatis.spring.annotation.MapperScannerRegistrar.registerBeanDefinitions(MapperScannerRegistrar.java:33) ~[mapper-spring-boot-autoconfigure-1.2.3.jar:na] at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.lambda SpringBoot2Bind.bind(SpringBootBindUtil.java:129) [mapper−spring−boot−autoconfigure−1.2.3.jar:na]attk.mybatis.spring.mapper.SpringBootBindUtil.bind(SpringBootBindUtil.java:58) [mapper−spring−boot−autoconfigure−1.2.3.jar:na]attk.mybatis.spring.mapper.ClassPathMapperScanner.setMapperProperties(ClassPathMapperScanner.java:48) [mapper−spring−boot−autoconfigure−1.2.3.jar:na]attk.mybatis.spring.annotation.MapperScannerRegistrar.registerBeanDefinitions(MapperScannerRegistrar.java:33) [mapper−spring−boot−autoconfigure−1.2.3.jar:na]atorg.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.lambdaloadBeanDefinitionsFromRegistrars 1 ( C o n f i g u r a t i o n C l a s s B e a n D e f i n i t i o n R e a d e r . j a v a : 363 ) [ s p r i n g − c o n t e x t − 5.1.15. R E L E A S E . j a r : 5.1.15. R E L E A S E ] a t j a v a . u t i l . L i n k e d H a s h M a p . f o r E a c h ( L i n k e d H a s h M a p . j a v a : 684 ) [ n a : 1.8. 0 1 31 ] a t o r g . s p r i n g f r a m e w o r k . c o n t e x t . a n n o t a t i o n . C o n f i g u r a t i o n C l a s s B e a n D e f i n i t i o n R e a d e r . l o a d B e a n D e f i n i t i o n s F r o m R e g i s t r a r s ( C o n f i g u r a t i o n C l a s s B e a n D e f i n i t i o n R e a d e r . j a v a : 362 ) [ s p r i n g − c o n t e x t − 5.1.15. R E L E A S E . j a r : 5.1.15. R E L E A S E ] a t o r g . s p r i n g f r a m e w o r k . c o n t e x t . a n n o t a t i o n . C o n f i g u r a t i o n C l a s s B e a n D e f i n i t i o n R e a d e r . l o a d B e a n D e f i n i t i o n s F o r C o n f i g u r a t i o n C l a s s ( C o n f i g u r a t i o n C l a s s B e a n D e f i n i t i o n R e a d e r . j a v a : 145 ) [ s p r i n g − c o n t e x t − 5.1.15. R E L E A S E . j a r : 5.1.15. R E L E A S E ] a t o r g . s p r i n g f r a m e w o r k . c o n t e x t . a n n o t a t i o n . C o n f i g u r a t i o n C l a s s B e a n D e f i n i t i o n R e a d e r . l o a d B e a n D e f i n i t i o n s ( C o n f i g u r a t i o n C l a s s B e a n D e f i n i t i o n R e a d e r . j a v a : 117 ) [ s p r i n g − c o n t e x t − 5.1.15. R E L E A S E . j a r : 5.1.15. R E L E A S E ] a t o r g . s p r i n g f r a m e w o r k . c o n t e x t . a n n o t a t i o n . C o n f i g u r a t i o n C l a s s P o s t P r o c e s s o r . p r o c e s s C o n f i g B e a n D e f i n i t i o n s ( C o n f i g u r a t i o n C l a s s P o s t P r o c e s s o r . j a v a : 327 ) [ s p r i n g − c o n t e x t − 5.1.15. R E L E A S E . j a r : 5.1.15. R E L E A S E ] a t o r g . s p r i n g f r a m e w o r k . c o n t e x t . a n n o t a t i o n . C o n f i g u r a t i o n C l a s s P o s t P r o c e s s o r . p o s t P r o c e s s B e a n D e f i n i t i o n R e g i s t r y ( C o n f i g u r a t i o n C l a s s P o s t P r o c e s s o r . j a v a : 232 ) [ s p r i n g − c o n t e x t − 5.1.15. R E L E A S E . j a r : 5.1.15. R E L E A S E ] a t o r g . s p r i n g f r a m e w o r k . c o n t e x t . s u p p o r t . P o s t P r o c e s s o r R e g i s t r a t i o n D e l e g a t e . i n v o k e B e a n D e f i n i t i o n R e g i s t r y P o s t P r o c e s s o r s ( P o s t P r o c e s s o r R e g i s t r a t i o n D e l e g a t e . j a v a : 275 ) [ s p r i n g − c o n t e x t − 5.1.15. R E L E A S E . j a r : 5.1.15. R E L E A S E ] a t o r g . s p r i n g f r a m e w o r k . c o n t e x t . s u p p o r t . P o s t P r o c e s s o r R e g i s t r a t i o n D e l e g a t e . i n v o k e B e a n F a c t o r y P o s t P r o c e s s o r s ( P o s t P r o c e s s o r R e g i s t r a t i o n D e l e g a t e . j a v a : 95 ) [ s p r i n g − c o n t e x t − 5.1.15. R E L E A S E . j a r : 5.1.15. R E L E A S E ] a t o r g . s p r i n g f r a m e w o r k . c o n t e x t . s u p p o r t . A b s t r a c t A p p l i c a t i o n C o n t e x t . i n v o k e B e a n F a c t o r y P o s t P r o c e s s o r s ( A b s t r a c t A p p l i c a t i o n C o n t e x t . j a v a : 705 ) [ s p r i n g − c o n t e x t − 5.1.15. R E L E A S E . j a r : 5.1.15. R E L E A S E ] a t o r g . s p r i n g f r a m e w o r k . c o n t e x t . s u p p o r t . A b s t r a c t A p p l i c a t i o n C o n t e x t . r e f r e s h ( A b s t r a c t A p p l i c a t i o n C o n t e x t . j a v a : 531 ) [ s p r i n g − c o n t e x t − 5.1.15. R E L E A S E . j a r : 5.1.15. R E L E A S E ] a t o r g . s p r i n g f r a m e w o r k . b o o t . w e b . s e r v l e t . c o n t e x t . S e r v l e t W e b S e r v e r A p p l i c a t i o n C o n t e x t . r e f r e s h ( S e r v l e t W e b S e r v e r A p p l i c a t i o n C o n t e x t . j a v a : 141 ) [ s p r i n g − b o o t − 2.1.14. R E L E A S E . j a r : 2.1.14. R E L E A S E ] a t o r g . s p r i n g f r a m e w o r k . b o o t . S p r i n g A p p l i c a t i o n . r e f r e s h ( S p r i n g A p p l i c a t i o n . j a v a : 744 ) [ s p r i n g − b o o t − 2.1.14. R E L E A S E . j a r : 2.1.14. R E L E A S E ] a t o r g . s p r i n g f r a m e w o r k . b o o t . S p r i n g A p p l i c a t i o n . r e f r e s h C o n t e x t ( S p r i n g A p p l i c a t i o n . j a v a : 391 ) [ s p r i n g − b o o t − 2.1.14. R E L E A S E . j a r : 2.1.14. R E L E A S E ] a t o r g . s p r i n g f r a m e w o r k . b o o t . S p r i n g A p p l i c a t i o n . r u n ( S p r i n g A p p l i c a t i o n . j a v a : 312 ) [ s p r i n g − b o o t − 2.1.14. R E L E A S E . j a r : 2.1.14. R E L E A S E ] a t o r g . s p r i n g f r a m e w o r k . b o o t . S p r i n g A p p l i c a t i o n . r u n ( S p r i n g A p p l i c a t i o n . j a v a : 1215 ) [ s p r i n g − b o o t − 2.1.14. R E L E A S E . j a r : 2.1.14. R E L E A S E ] a t o r g . s p r i n g f r a m e w o r k . b o o t . S p r i n g A p p l i c a t i o n . r u n ( S p r i n g A p p l i c a t i o n . j a v a : 1204 ) [ s p r i n g − b o o t − 2.1.14. R E L E A S E . j a r : 2.1.14. R E L E A S E ] a t c o m . t a n g s i r . u s e r . T a n g U s e r A p p l i c a t i o n . m a i n ( T a n g U s e r A p p l i c a t i o n . j a v a : 12 ) [ c l a s s e s / : n a ] C a u s e d b y : j a v a . l a n g . r e f l e c t . I n v o c a t i o n T a r g e t E x c e p t i o n : n u l l a t s u n . r e f l e c t . N a t i v e M e t h o d A c c e s s o r I m p l . i n v o k e 0 ( N a t i v e M e t h o d ) [ n a : 1.8. 0 1 31 ] a t s u n . r e f l e c t . N a t i v e M e t h o d A c c e s s o r I m p l . i n v o k e ( N a t i v e M e t h o d A c c e s s o r I m p l . j a v a : 62 ) [ n a : 1.8. 0 1 31 ] a t s u n . r e f l e c t . D e l e g a t i n g M e t h o d A c c e s s o r I m p l . i n v o k e ( D e l e g a t i n g M e t h o d A c c e s s o r I m p l . j a v a : 43 ) [ n a : 1.8. 0 1 31 ] a t j a v a . l a n g . r e f l e c t . M e t h o d . i n v o k e ( M e t h o d . j a v a : 498 ) [ n a : 1.8. 0 1 31 ] a t t k . m y b a t i s . s p r i n g . m a p p e r . S p r i n g B o o t B i n d U t i l 1(ConfigurationClassBeanDefinitionReader.java:363) ~[spring-context-5.1.15.RELEASE.jar:5.1.15.RELEASE] at java.util.LinkedHashMap.forEach(LinkedHashMap.java:684) ~[na:1.8.0_131] at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsFromRegistrars(ConfigurationClassBeanDefinitionReader.java:362) ~[spring-context-5.1.15.RELEASE.jar:5.1.15.RELEASE] at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:145) ~[spring-context-5.1.15.RELEASE.jar:5.1.15.RELEASE] at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:117) ~[spring-context-5.1.15.RELEASE.jar:5.1.15.RELEASE] at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:327) ~[spring-context-5.1.15.RELEASE.jar:5.1.15.RELEASE] at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:232) ~[spring-context-5.1.15.RELEASE.jar:5.1.15.RELEASE] at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:275) ~[spring-context-5.1.15.RELEASE.jar:5.1.15.RELEASE] at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:95) ~[spring-context-5.1.15.RELEASE.jar:5.1.15.RELEASE] at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:705) ~[spring-context-5.1.15.RELEASE.jar:5.1.15.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:531) ~[spring-context-5.1.15.RELEASE.jar:5.1.15.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.1.14.RELEASE.jar:2.1.14.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:744) [spring-boot-2.1.14.RELEASE.jar:2.1.14.RELEASE] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:391) [spring-boot-2.1.14.RELEASE.jar:2.1.14.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:312) [spring-boot-2.1.14.RELEASE.jar:2.1.14.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.1.14.RELEASE.jar:2.1.14.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1204) [spring-boot-2.1.14.RELEASE.jar:2.1.14.RELEASE] at com.tangsir.user.TangUserApplication.main(TangUserApplication.java:12) [classes/:na] Caused by: java.lang.reflect.InvocationTargetException: null at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_131] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_131] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_131] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_131] at tk.mybatis.spring.mapper.SpringBootBindUtil 1(ConfigurationClassBeanDefinitionReader.java:363) [spring−context−5.1.15.RELEASE.jar:5.1.15.RELEASE]atjava.util.LinkedHashMap.forEach(LinkedHashMap.java:684) [na:1.8.0131]atorg.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsFromRegistrars(ConfigurationClassBeanDefinitionReader.java:362) [spring−context−5.1.15.RELEASE.jar:5.1.15.RELEASE]atorg.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:145) [spring−context−5.1.15.RELEASE.jar:5.1.15.RELEASE]atorg.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:117) [spring−context−5.1.15.RELEASE.jar:5.1.15.RELEASE]atorg.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:327) [spring−context−5.1.15.RELEASE.jar:5.1.15.RELEASE]atorg.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:232) [spring−context−5.1.15.RELEASE.jar:5.1.15.RELEASE]atorg.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:275) [spring−context−5.1.15.RELEASE.jar:5.1.15.RELEASE]atorg.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:95) [spring−context−5.1.15.RELEASE.jar:5.1.15.RELEASE]atorg.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:705) [spring−context−5.1.15.RELEASE.jar:5.1.15.RELEASE]atorg.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:531) [spring−context−5.1.15.RELEASE.jar:5.1.15.RELEASE]atorg.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) [spring−boot−2.1.14.RELEASE.jar:2.1.14.RELEASE]atorg.springframework.boot.SpringApplication.refresh(SpringApplication.java:744)[spring−boot−2.1.14.RELEASE.jar:2.1.14.RELEASE]atorg.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:391)[spring−boot−2.1.14.RELEASE.jar:2.1.14.RELEASE]atorg.springframework.boot.SpringApplication.run(SpringApplication.java:312)[spring−boot−2.1.14.RELEASE.jar:2.1.14.RELEASE]atorg.springframework.boot.SpringApplication.run(SpringApplication.java:1215)[spring−boot−2.1.14.RELEASE.jar:2.1.14.RELEASE]atorg.springframework.boot.SpringApplication.run(SpringApplication.java:1204)[spring−boot−2.1.14.RELEASE.jar:2.1.14.RELEASE]atcom.tangsir.user.TangUserApplication.main(TangUserApplication.java:12)[classes/:na]Causedby:java.lang.reflect.InvocationTargetException:nullatsun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethod) [na:1.8.0131]atsun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) [na:1.8.0131]atsun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [na:1.8.0131]atjava.lang.reflect.Method.invoke(Method.java:498) [na:1.8.0131]attk.mybatis.spring.mapper.SpringBootBindUtilSpringBoot2Bind.bind(SpringBootBindUtil.java:127) ~[mapper-spring-boot-autoconfigure-1.2.3.jar:na]
… 21 common frames omitted
Caused by: java.util.NoSuchElementException: No value bound
at org.springframework.boot.context.properties.bind.BindResult.get(BindResult.java:56) ~[spring-boot-2.1.14.RELEASE.jar:2.1.14.RELEASE]
… 26 common frames omittedDisconnected from the target VM, address: ‘127.0.0.1:65366’, transport: ‘socket’
Process finished with exit code 1
解决：
在application.properties添加mapper.identity=MYSQL
-
java.lang.IllegalArgumentException: Can not set java.lang.String field xxx to java.lang.Class
2021-06-05 09:43:49IllegalArgumentException是设置错了，field.get()参数需要的是该类对象，而不是该类的class对象 //Student student = new Student(); Class<Student> cls = Student.class; Field hhh = cls.getField("hhh... -
如何解決java.lang.AssertionError：期望的異常：Mockito中的java.lang.Exception
2021-03-06 04:09:25我有一個使用spring驗證器的用戶驗證器的書面單元測試用例。下面是類。我在Spring驗證器的validate方法中面臨問題，調用...如何解決java.lang.AssertionError：期望的異常：Mockito中的java.lang.Exceptionpublic c... -
解java: 不兼容的类型: java.util.List＜java.util.Map＜java.lang.String,java.lang.Object＞＞无法转换为...
2021-07-25 12:21:26import java.util.List; import java.util.Map; @Controller @RequestMapping("/user") public class UserController { @Autowired private JdbcTemplate jdbcTemplate; @RequestMapping("findAll") public String ... -
解决java.lang.String cannot be cast to java.lang.Integer异常
2021-02-24 10:51:58开发中经常会遇到java.lang.String cannot be cast to java.lang.Integer异常，记录下我怎么解决的。 这种异常就是经常会出现类型转换的地方，这里面有些小坑，必须要踩过，撸源码才知道问题原因，哈哈。 比如我在... -
java.lang.IllegalAccessException:is not accessible from java.lang.Class＜android.app.Instrumentation...
2022-03-22 13:05:54java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.classwork10b/com.example.classwork10b.Sea_del_Avtivity}: java.lang.IllegalAccessException: java.lang.Class<... -
java.lang.ClassNotFoundException: java.lang.reflect.InaccessibleObjectException
2020-10-28 21:44:392020-10-28 21:33:17 |DEBUG |main |DirectJDKLog.java:175 |org.apache.tomcat.util.compat.Jre9Compat |...java.lang.ClassNotFoundException: java.lang.reflect.InaccessibleObjectException 升级JDK版本 9及以上 -
解决java.lang.ClassCastException: class java.lang.Integer cannot be cast to class java.lang.Long异常
2020-07-21 22:58:54} 用Postman调用API报错如下： java.lang.ClassCastException: class java.lang.Integer cannot be cast to class java.lang.Long (java.lang.Integer and java.lang.Long are in module java.base of loader '... -
java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long
2019-05-14 10:52:20java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long问题描述：报错信息：Error querying database. Cause: java.sql.SQLException: java.lang.ClassCastException: java.math.... -
Mybatis报错: java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Character
2019-02-08 21:48:30Caused by: java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Character at org.apache.ibatis.type.CharacterTypeHandler.setNonNullParameter(CharacterTypeHandler.java:26) at ... -
nested exception is java.lang.ClassCastException: java.lang String cannot be cast to java.util.Map
2020-12-01 20:21:09nested exception is java.lang.ClassCastException: java.lang String cannot be cast to java.util.Map 首先，这个错误很明显，类型转换异常，当时后端查找了下，没问题，打断点根本就没有进入到程序中，同 -
Cause: java.lang.IllegalArgumentException: invalid comparison: java.util.Date and java.lang.String
2021-01-29 16:19:27Cause: java.lang.IllegalArgumentException: invalid comparison: java.util.Date and java.lang.String 原因是mybatis 对于时间参数进行比较时的一个bug. 如果拿传入的时间类型参数与空字符串''进行对比判断则... -
解决Java ，class java.lang.String cannot be cast to class java.lang.Integer
2020-12-09 19:41:27@[TOC](解决 java.lang.ClassCastException: class java.lang.String cannot be cast to class java.lang.Integer (java.lang.String and java.lang.Integer are in module java.base of loader ‘bootstrap’)) ... -
解决：java.lang.ExceptionInInitializerError。Caused by: java.lang.IllegalStateException: SpringJUnit...
2020-10-12 16:49:43java.lang.ExceptionInInitializerError at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.... -
java.lang.Integer cannot be cast to java.lang.Long解决办法
2020-06-15 11:51:19你好我是辰兮，本次是项目遇到的java.lang.Integer cannot be cast to java.lang.Long异常以及相对应的解决方案。 文章目录 一、实战问题 二、源码学习 一、实战问题 用postman测试数据报错，类型转换异常！ 如何将... -
java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String的直接解决办法
2020-11-03 10:12:38java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String 问题背景 接口中参数为 Map<String,Object>取出某 KEY 值时，强制将其转为 String ，出现上述异常 问题分析 以 Map&... -
每日一坑：Eclipse安装lambok插件大坑比：Unable to make protected final java.lang.Class java.lang....
2021-07-28 17:18:34Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) throws java.lang.ClassFormatError accessible: module java.base does not “opens java -
java.lang.ClassCastException: java.util.HashMap cannot be cast to java.lang.String
2019-11-06 09:11:44用List<String> list 接收的list，获取list长度，循环得到 list.get(i),想得到集合中的...java.lang.ClassCastException: java.util.HashMap cannot be cast to java.lang.String at io.renren.modules.equip... -
java.lang.ClassNotFoundException：如何解决
2020-05-08 17:05:39本文适用于当前面临java.lang.ClassNotFoundException挑战的Java初学者。 它将为您提供此常见Java异常的概述，这是一个示例Java程序，可支持您的学习过程和解决策略。 如果您对与更高级的类加载器相关的问题感兴趣... -
java.lang.ClassCastException: java.util.Date cannot be cast to java.lang.String
2019-03-08 10:28:15mybatis中Date参数传入报异常：java.lang.ClassCastException: java.util.Date cannot be cast to java.lang.String； 异常信息如下： org.mybatis.spring.MyBatisSystemException: nested exception is org.... -
java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String
2019-01-16 15:42:05java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Long at com.facishare.appserver.test.MyTest.main(MyTest.java:878) at sun.reflect.NativeMethodAccessorImpl.invoke0... -
java.lang.String cannot be cast to java.lang.Integer解决方案
2020-05-03 21:19:55就会报java.lang.String cannot be cast to java.lang.Integer 从文字而言可以看出是 String不能转换成Integer类型 那么就用valueof Object operType = param.get(SpeedMessageKey.OPERTYPE.getValue()); if( ... -
解决Failed to convert value of type ‘java.lang.String‘ to required type ‘java.lang.Integer
2021-11-01 11:34:37项目：网上商城练习 问题：使用postman测试接口报错：类型转换异常 上代码： @GetMapping(value = "/search/{page}/{size}" ) public Result<PageInfo> findPage(@PathVariable(value = "page") int page, @... -
错误原因：java.lang.UnsatisfiedLinkError: no opencv_java430 in java.library.path
2022-04-28 20:03:59java.lang.UnsatisfiedLinkError: no opencv_java430 in java.library.path 看起来像opencv的包没导入进来，后来的解决方法是在本地（windows系统）的jdk的bin中加一个opencv_java430.dll这个包，比如我加入后的... -
Failed to bind properties under 'logging.level' to java.util.Map java.lang.String, java.lang.String
2019-05-01 20:26:30springBoot 2.0 添加 日志级别，启动报错： org.springframework.boot.context.properties.bind.BindException: Failed to bind properties under 'logging.level' to ...java.lang.String, java.lang.String&...
