Category Archives: JAVA

[Solved] Failed to start bean ‘eurekaAutoServiceRegistration‘; nested exception is java.lang.NullPointerExce

When using spring-cloud-starter-netflix-eureka-client, the following exception was encountered when starting the project. Failed to start bean ‘eurekaAutoServiceRegistration’; nested exception is java.lang.NullPointerExce

org.springframework.context.ApplicationContextException: Failed to start bean 'eurekaAutoServiceRegistration'; nested exception is java.lang.NullPointerException
	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:176) ~[spring-context-4.3.17.RELEASE.jar:4.3.17.RELEASE]
	at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:50) ~[spring-context-4.3.17.RELEASE.jar:4.3.17.RELEASE]
	at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:346) ~[spring-context-4.3.17.RELEASE.jar:4.3.17.RELEASE]
	at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:149) ~[spring-context-4.3.17.RELEASE.jar:4.3.17.RELEASE]
	at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:112) ~[spring-context-4.3.17.RELEASE.jar:4.3.17.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:880) ~[spring-context-4.3.17.RELEASE.jar:4.3.17.RELEASE]
	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.finishRefresh(EmbeddedWebApplicationContext.java:144) ~[spring-boot-1.5.13.RELEASE.jar:1.5.13.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546) ~[spring-context-4.3.17.RELEASE.jar:4.3.17.RELEASE]
	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.13.RELEASE.jar:1.5.13.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) [spring-boot-1.5.13.RELEASE.jar:1.5.13.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) [spring-boot-1.5.13.RELEASE.jar:1.5.13.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) [spring-boot-1.5.13.RELEASE.jar:1.5.13.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) [spring-boot-1.5.13.RELEASE.jar:1.5.13.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) [spring-boot-1.5.13.RELEASE.jar:1.5.13.RELEASE]
	at com.shanba.SbnsyhManageApplication.main(SbnsyhManageApplication.java:12) [classes/:na]
Caused by: java.lang.NullPointerException: null
	at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaServiceRegistry.maybeInitializeClient(EurekaServiceRegistry.java:56) ~[spring-cloud-netflix-eureka-client-1.3.0.RELEASE.jar:1.3.0.RELEASE]
	at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaServiceRegistry.register(EurekaServiceRegistry.java:37) ~[spring-cloud-netflix-eureka-client-1.3.0.RELEASE.jar:1.3.0.RELEASE]
	at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaAutoServiceRegistration.start(EurekaAutoServiceRegistration.java:73) ~[spring-cloud-netflix-eureka-client-1.3.0.RELEASE.jar:1.3.0.RELEASE]
	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:173) ~[spring-context-4.3.17.RELEASE.jar:4.3.17.RELEASE]
	... 14 common frames omitted

Reason: spring cloud’s jar package is introduced in POM in sequence

Wrong reference

<!--thymeleaf Template engine configuration-->
<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<!--Web依赖-->
<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
	<groupId>org.springframework.cloud</groupId>
	<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>

Normal reference

<dependency>
	<groupId>org.springframework.cloud</groupId>
	<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<!--thymeleaf Template engine configuration-->
<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<!--Web-->
<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-web</artifactId>
</dependency>

[Solved] JDK Install Error /lib/ld-linux.so.2: bad ELF interpreter: No such file or directory

CentOS 7.6 JDK installation, download the following JDK package

wget https://mirrors.huaweicloud.com/java/jdk/8u201-b09/jdk-8u201-linux-i586.tar.gz

After installation. After configuring environment variables, execute Java – version to report an error

-bash: /root/jdk1.8.0_201/bin/java: /lib/ld-linux.so.2: bad ELF interpreter: No such file or directory


Solution
Just run sudo yum install glibc.i686
Then look at java -version OK!

[Solved] IDEA Import springboot Project Error: Cannot resolve plugin org.springframework.boot:spring-boot-maven-plugin:＜unknown＞

Today, after pulling the springboot project from gitee, I found that idea directly reported an error. The error is as follows:

Cannot resolve plugin org.springframework. boot:spring-boot-maven-plugin :

At first, I thought it was an error in the project. Later, baidu found that the default Maven configuration file and the default local warehouse address were used in the configuration of the project.

resolvent:

Open file — & gt; Settings –> Build, Execution, Deploymen –> Build Tools –>   Maven, find the user Maven configuration file and local warehouse address, and modify it to the local configuration file path and warehouse address.

Before revision:

After modification:

Refresh Maven again and solve the problem

[How to Solve] Invalid bound statement (not found)

When integrating mybatis with springboot, an error of invalid bound statement (not found) is reported. After repeated changes and trial and error, it is found that mapper.xml cannot be scanned. The key lies in two aspects.

    1. if you put XML in the Java directory, you need to configure the path in the POM package
<resources>
			<resource>
				<directory>src/main/java</directory>
				<includes>
					<include>**/sqlmap/*.xml</include>
				</includes>
				<filtering>false</filtering>
			</resource>
			<resource>
				<directory>src/main/resources</directory>
				<includes>
					<include>**/*.*</include>
				</includes>
				<filtering>true</filtering>
			</resource>
		</resources>
      1. add the statement of scan mapping file to mybatis configuration class
 PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        sessionFactory.setMapperLocations(resolver.getResources("classpath*:**/sqlmap/*.xml"));//扫描映射文件
        1. if the mapper.xml file is placed in the resources directory, maperlocations should be configured in application.yml
mybatis:
  mapper-locations: classpath:mapping/*.xml  #Note: Be sure to correspond to the path where the mapper mapping xml file is located

[Solved] Springboot Project Start Error: An attempt was made to call the method com.google.common.collect.Multimaps.asMap

An attempt was made to call the method com.google.common.collect.Multimaps.asMap(Lcom/google/common/collect/ListMultimap;)Ljava/util/Map; but it does not exist. Its class, com.google.common.collect.Multimaps, is available from the following locations:
jar:file:/D:/tools/maven/data/org/apache/hive/hive-exec/1.1.0-cdh5.7.0/hive-exec-1.1.0-cdh5.7.0.jar!/com/google/common/collect/Multimaps.class
jar:file:/D:/tools/maven/data/com/google/guava/guava/14.0.1/guava-14.0.1.jar!/com/google/common/collect/Multimaps.class
It was loaded from the following location:
file:/D:/tools/maven/data/org/apache/hive/hive-exec/1.1.0-cdh5.7.0/hive-exec-1.1.0-cdh5.7.0.jar

Action:
Correct the classpath of your application so that it contains a single, compatible version of com.google.common.collect.Multimaps
 

Solution
(istMultimap;)Ljava/util/Map; but it does not exist. Its class, com.google.common.collect.Multimaps,) This sentence already explains that the method can not be found, hive-exec inside the use of Multimaps method is not available under guava package, finally found that it is the version of the problem, add the following problem solved

[Solved] Tomcat7 Start Error: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardCon

When transforming a project in eclipse, tomcat7 is always started

Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/AtomLocal]]

terms of settlement:

Right click project properties, find deployment assembly, add Java build path entries and Maven dependencies

Java.lang.exceptionininitializererror [How to Fix]

During the unit test of springboot project, the program always reports the error of Java. Lang. exceptionininitializererror, indicating the error in the line of mock static class

at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:326)
	at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:89)
	at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:97)
	at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest(PowerMockJUnit44RunnerDelegateImpl.java:310)
	at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper(PowerMockJUnit47RunnerDelegateImpl.java:131)
	at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.access$100(PowerMockJUnit47RunnerDelegateImpl.java:59)
	at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner$TestExecutorStatement.evaluate(PowerMockJUnit47RunnerDelegateImpl.java:147)
	at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.evaluateStatement(PowerMockJUnit47RunnerDelegateImpl.java:107)
	at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTest(PowerMockJUnit47RunnerDelegateImpl.java:82)
	at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters(PowerMockJUnit44RunnerDelegateImpl.java:298)
	at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:87)
	at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:50)
	at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:218)
	at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:160)
	at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:134)
	at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:34)
	at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:44)
	at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:136)
	at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:117)
	at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:57)
	at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:59)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
	at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
	at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:221)
	at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54)

Finally, it is found that the class where the when new object is located is not added in @preparefortest, only the class for UT is added

[Solved] Java.lang.ClassCastException: [Ljava.lang.Long； cannot be cast to java.util.List

preface

Recently, I used the Renren fast framework to transform a crawler 3.0 project, and found an official bug java. Lang. ClassCastException: [ljava. Lang. long; Can't be cast to Java. Util. List , because long [] can't be converted to List & lt; Object caused.
Detailed error report

2021-06-20 22:14:48.436 ERROR 15920 --- [io-8080-exec-18] i.r.common.exception.RRExceptionHandler  : nested exception is org.apache.ibatis.exceptions.PersistenceException: 
### Error updating database.  Cause: java.lang.ClassCastException: class [Ljava.lang.Long; cannot be cast to class java.util.List ([Ljava.lang.Long; and java.util.List are in module java.base of loader 'bootstrap')
### The error may exist in file [D:\workspace\spring\TenderFetchSystem\tfs-admin\target\classes\mapper\job\ScheduleJobDao.xml]
### The error may involve io.renren.modules.job.dao.ScheduleJobDao.updateBatch
### The error occurred while executing an update
### Cause: java.lang.ClassCastException: class [Ljava.lang.Long; cannot be cast to class java.util.List ([Ljava.lang.Long; and java.util.List are in module java.base of loader 'bootstrap')

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: 
### Error updating database.  Cause: java.lang.ClassCastException: class [Ljava.lang.Long; cannot be cast to class java.util.List ([Ljava.lang.Long; and java.util.List are in module java.base of loader 'bootstrap')
### The error may exist in file [D:\workspace\spring\TenderFetchSystem\tfs-admin\target\classes\mapper\job\ScheduleJobDao.xml]
### The error may involve io.renren.modules.job.dao.ScheduleJobDao.updateBatch
### The error occurred while executing an update
### Cause: java.lang.ClassCastException: class [Ljava.lang.Long; cannot be cast to class java.util.List ([Ljava.lang.Long; and java.util.List are in module java.base of loader 'bootstrap')
	at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:92)
	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:440)
	at com.sun.proxy.$Proxy90.update(Unknown Source)
	at org.mybatis.spring.SqlSessionTemplate.update(SqlSessionTemplate.java:287)
	at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.execute(MybatisMapperMethod.java:65)
	at com.baomidou.mybatisplus.core.override.MybatisMapperProxy.invoke(MybatisMapperProxy.java:96)
	at com.sun.proxy.$Proxy152.updateBatch(Unknown Source)
	at io.renren.modules.job.service.impl.ScheduleJobServiceImpl.updateBatch(ScheduleJobServiceImpl.java:100)
	at io.renren.modules.job.service.impl.ScheduleJobServiceImpl.pause(ScheduleJobServiceImpl.java:118)
	at io.renren.modules.job.service.impl.ScheduleJobServiceImpl$$FastClassBySpringCGLIB$$1.invoke(<generated>)
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:769)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
	at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:366)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:99)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689)
	at io.renren.modules.job.service.impl.ScheduleJobServiceImpl$$EnhancerBySpringCGLIB$$1.pause(<generated>)
	at io.renren.modules.job.controller.ScheduleJobController.pause(ScheduleJobController.java:115)
	at io.renren.modules.job.controller.ScheduleJobController$$FastClassBySpringCGLIB$$1.invoke(<generated>)
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:769)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
	at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:88)
	at io.renren.common.aspect.SysLogAspect.around(SysLogAspect.java:52)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633)
	at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
	at org.apache.shiro.spring.security.interceptor.AopAllianceAnnotationsAuthorizingMethodInterceptor$1.proceed(AopAllianceAnnotationsAuthorizingMethodInterceptor.java:82)
	at org.apache.shiro.authz.aop.AuthorizingMethodInterceptor.invoke(AuthorizingMethodInterceptor.java:39)
	at org.apache.shiro.spring.security.interceptor.AopAllianceAnnotationsAuthorizingMethodInterceptor.invoke(AopAllianceAnnotationsAuthorizingMethodInterceptor.java:115)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:95)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689)
	at io.renren.modules.job.controller.ScheduleJobController$$EnhancerBySpringCGLIB$$1.pause(<generated>)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:888)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	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:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:112)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at io.renren.common.xss.XssFilter.doFilter(XssFilter.java:30)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:61)
	at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108)
	at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137)
	at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
	at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66)
	at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449)
	at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365)
	at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)
	at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)
	at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:387)
	at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362)
	at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271)
	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:100)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
	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.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
	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:201)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
	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:202)
	at org.apache.catalina.core.StandardContextValve.__invoke(StandardContextValve.java:96)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:41002)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:860)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1598)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:834)

Solutions

1. First of all, of course, it starts with interface call

through debugging, it is found that Vue calls the back-end “/ pause” interface

2. Do it by yourself. Through a simple analysis of the code, to locate the problem
originally, it was map.put ("list", jobids) but jobids is not List , the problem is ~
by using arrays.aslist (jobids) to directly convert the object to List type, the problem is solved!

@Service("scheduleJobService")
public class ScheduleJobServiceImpl extends ServiceImpl<ScheduleJobDao, ScheduleJobEntity> implements ScheduleJobService {
//Selected from ScheduleJobServiceImpl This class, omitting other irrelevant content.

	@Override
	@Transactional(rollbackFor = Exception.class)
    public void pause(Long[] jobIds) {
        // Iterate and stop the job
		for(Long jobId : jobIds){
    		ScheduleUtils.pauseJob(scheduler, jobId);
    	}
        //Update the status after stopping the job
    	updateBatch(jobIds, Constant.ScheduleStatus.PAUSE.getValue());
    }
	@Override
    public int updateBatch(Long[] jobIds, int status){
    	Map<String, Object> map = new HashMap<>(2);
    	//fix official bug,by zhengkai.blog.csdn.net
    	map.put("list", Arrays.asList(jobIds));
    	map.put("status", status);
    	return baseMapper.updateBatch(map);
    }

}

3. Verification

JAVA: How to Use Multipartfile to upload Files 

@PostMapping("upload")
public ResponseVo upload(@RequestParam("files[]") MultipartFile[] files) {
    Map<String, Object> resultMap = new HashMap<>();
    if (ArrayUtils.isEmpty(files)) {
        //resultMap.put("message", MessageUtil.getMessage("upload.error.no_files"));
        return new ResponseVo(ErrorCode.ACTION_ERROR).setMsg("没有上传文件");
    }
    MultipartFile multipartFile = files[0];
    File tmpFile = new File(System.currentTimeMillis() + "_" + multipartFile.getOriginalFilename());
    try (BufferedOutputStream outBuff = new BufferedOutputStream(new FileOutputStream(tmpFile)); BufferedInputStream inBuff = new BufferedInputStream(multipartFile.getInputStream())) {
        // Buffered arrays
        byte[] b = new byte[1024 * 5];
        int len;
        while ((len = inBuff.read(b)) != -1) {
            outBuff.write(b, 0, len);
        }
        // Flush the output stream of this buffer
        outBuff.flush();
        resultMap.put("message", MessageUtil.getMessage("upload.success"));
        resultMap.put("data", tmpFile);
    } catch (Exception e) {
        log.error(e.getMessage(), e);
        return new ResponseVo().setMsg("upload failed");
    } finally {
        FileUtils.deleteQuietly(tmpFile);
    }
    return new ResponseVo().setData(resultMap);
}

Result of postman call:

</ div>

[Solved] You must configure either the server or JDBC driver (via the ‘serverTimezone‘ configuration proper

This error occurs when running the example
2021-06-25 10:14:14.571 ERROR 10096 — [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.transaction.CannotCreateTransactionException: Could not open JDBC Connection for transaction; nested exception is java.sql.SQLException: The server time zone value ‘�й���׼ʱ��’ is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the ‘serverTimezone’ configuration property) to use a more specifc time zone value if you want to utilize time zone support.] with root causeSolution:

add the following codes to application.properties

spring.datasource.url=jdbc:mysql://localhost:3306/you_mysql?serverTimezone=UTC

[Solved] Circular view path [index]: would dispatch back to the current handler URL [] again. Che

Error report content
circular view path [index]: would dispatch back to the current handler URL// login/index] again. Check your viewresolver setup（ Hint: This may be the result of an unspecified view, due to default view name generation.)

Change @ controller to @ restcontroller

The @restcontroller annotation is equivalent to the function of @ResponseBody + @ controller
without annotation, @ResponseBody or @restcontroller will set the return value to JSON format, otherwise it will automatically think that you are returning a page
in the @ controller annotation, you can return a string or a template name that matches the string, that is, directly render the view and use it with HTML pages,

In this case, the front-end and back-end requirements are relatively high. The Java back-end code should be rendered in combination with HTML. The data of the model object (or modelandview) will be used to fill in the relevant attributes in the user view, and then displayed to the browser. This process can also be called rendering

In @restcontroller, you should return an object, that is, return a user object. At this time, you can also see that the return is a JSON string corresponding to a user object without a page. The function of the front end is to use the returned JSON to parse and render the page, and the code of the Java back end is relatively free.

[How to Solve] Idea prompt does not support Lombok

IDEA suggests that lombok is not supported
IDEA version Community 2021.1
When debugging: “You aren’t using a compiler supported by lombok, so lombok will not work and has been disabled. ”
Solution.
File -> Settings -> Build,Execution,Deployment -> Compiler -> Shared build process VM options
Fill in:-Djps.track.ap.dependencies=false