【java.lang.IllegalStateException: Duplicate key 20】教程文章相关的互联网学习教程文章

java代码的MapReduce打包成jar 报错: JAVA程序运行时出现:Exception in thread "main" java.lang.ArrayIndexOut

以前的学习笔记,整理一下: java代码的MapReduce打包成jar 报错: JAVA程序运行时出现:Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0 at PrintWhat.main(PrintWhat.java:14)? 改正: 命令行输入时没有输入参数。 命令行输入时没有输入参数。------------你在main方法中的这句话:int month=Integer.getInteger(args[0]);使得数组args[]被用到了( args[0] ),所以main方法执行时是需要一组String 类型...

TestNG运行时报错:Exception in thread "main" java.lang.IllegalAccessError

使用idea做单元测试时,TestNG运行时报错:Exception in thread "main" java.lang.IllegalAccessError: tried to access method org.testng.TestNG.configure(Lorg/testng/CommandLineArgs;)V from class org.testng.RemoteTestNGStarter at org.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:126) 原因:之前在本地jdk的C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext路径下已经导入了testng-6.8.21包,导致与idea...

Request processing failed; nested exception is java.lang.IllegalStateException: getOutputStream() ha【代码】【图】

问题分析: 在ServletRequest servletRequest中已经存在一个项目名称,此时,又用项目名称访问 http://localhost:8080/rent/pdf/preview rent这个名称已经在Application.yml中设置了, 这时会生成一个缓存在servletRequest中,访问就会有重复的/rent,就会报错 解决方案 清空servletRequest中存在的/rent缓存1 @Override2 public void doFilter(ServletRequest servletRequest, ServletResponse servl...

java String 转Json报错 java.lang.NoClassDefFoundError: org/apache/commons/lang/exception/NestableRuntim

这个问题就是缺少jar包依赖!!! java.lang.NoClassDefFoundError: org/apache/commons/beanutils/DynaBean 缺少commons-beanutils-1.8.0.jar java.lang.NoClassDefFoundError: org/apache/commons/collections/map/ListOrderedMap 缺少commons-collections.jar java.lang.NoClassDefFoundError: org/apache/commons/lang/exception/NestableRuntimeException缺少commons-lang-2.4.jarjava.lang.NoClassDefFoundError: org/apa...

error:nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 're

配置文件application.properties 或 application.yml 的${resource.config.permit}配置错误 org.springframework.beans.factory.BeanCreationException: Error creating bean with name resourceServerConfig: Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder resource.config.permit in value "${resource.config.permit}" at org....

Java异常处理-Exception 和 RuntimeException 区别【代码】【图】

Exception是检查型异常,在程序中必须使用try...catch进行处理; RuntimeException是非检查型异常,例如NumberFormatException,可以不使用try...catch进行处理, 但是如果产生异常,则异常将由JVM进行处理; RuntimeException最好也用try...catch捕获;package com.java1234.chap04.sec04;public class Demo1 {/*** 运行时异常,编译时不检查,可以不使用try...catch捕获* @throws RuntimeException*/public static void testRunt...

java中error和exception

异常是指程序运行时发生的错误。 Throwable是所有异常的父类,它有两个子类:Error和Exception。 1.Error表示程序在运行期间发生了非常严重的错误,并且该错误是不可恢复的。Error不需要捕捉。如:OutOfMemoryError。 2.Exception是可恢复的异常。它包括2种异常:检查异常和运行时异常。 2.1检查异常(Check Exception) 比如IOexception、SQLException和FileNotFoundException都是检查异常。它发生在编译阶段,编译器会强制程序去...

java中exception和error有什么区别,运行时异常和一般异常有什么区别

1.exception和error都是继承了throwable类,在java中只有throwable类型的实例才可以被抛出(throw)或者捕获(catch),它是异常处理机制的基本组成类型 2.exception和error体现了java平台设计者对不同异常情况的分类。exception是程序正常运行中,可以预料的意外情况,并且应该被捕获,进行相应的处理 3.error是指在正常情况下,不大可能出现的情况,绝大部分的error都会导致程序(比如jvm自身)处于非正常的、不可恢复的状态。既然是非...

测试--错误java.lang.Exception: No tests found matching [{ExactMatcher:fDisplayName=select], {ExactMatche【代码】【图】

异常这个错误java.lang.Exception: No tests found matching [{ExactMatcher:fDisplayName=select], {ExactMatcher:fDisplayName=select(com.rjj.demo.DemoApplicationTests)], {LeadingIdentifierMatcher:fClassName=com.rjj.demo.DemoApplicationTests,fLeadingIdentifier=select]] from org.junit.internal.requests.ClassRequest@38c6f217at org.junit.internal.requests.FilterRequest.getRunner(FilterRequest.java:40)at or...

java.io.IOException: java.sql.SQLRecoverableException: Io exception: Connection reset 熵值不足【代码】

java.io.IOException: java.sql.SQLRecoverableException: Io exception: Connection reset 研究了半天说是熵值不足,先试试再说: 2021-04-21 04:24:49,225 WARN [main] org.apache.hadoop.mapred.YarnChild: Exception running child : java.io.IOException: java.sql.SQLRecoverableException: Io exception: Connection resetat org.apache.sqoop.mapreduce.ExportBatchOutputFormat.getRecordWriter(ExportBatchOutputFormat....

Exception in thread "main" java.sql.SQLException: ORA-01017: invalid username/password; lo

在用spring配置文件applicationContext.xml中引入src下的properties文件 <context:property-placeholder location="classpath:jdbc.properties"/> <!-- DriveManagerDataSource spring自带数据源实现对象 --> <bean id="dataSource" class="${dataSource}"> <!-- 这些配置Spring在启动时会去jdbc.properties中找 --><property name="driverClassName" value="${driverClassName}" /><property name="url" value="${url}" /><proper...

Factory method ‘sqlSessionFactory‘ threw exception; nested exception is java.lang.NoSuchMethodError:【代码】

springboot 引入mybatis-plus后报错: Factory method ‘sqlSessionFactory’ threw exception; nested exception is java.lang.NoSuchMethodError: com.baomidou.mybatisplus.entity.GlobalConfiguration.getWorkerId()Ljava/lang/Long; org.apache.ibatis.binding.BindingException: Invalid bound statement (not found) Error starting ApplicationContext. To display the conditions report re-run your application with 'd...

异常-ERROR yarn.ApplicationMaster: User class threw exception: java.sql.SQLException: Communications l

1 详细异常信息ERROR yarn.ApplicationMaster: User class threw exception: java.sql.SQLException: Communications link failure The last packet successfully received from the server was 18,973 milliseconds ago. The last packet sent successfully to the server was 3 milliseconds ago. Query: select user_register_analyse_id as userRegisterAnalyseId,day_time as dayTime,city_code as cityCode,city,city_provi...

javax.persistence.PersistenceException:org.hibernate.exception.SQLGrammarException:无法使用heroku Postgr【代码】

我正在尝试在我的应用程序中使用数据库,但始终收到此错误.当我将其上载到heroku时,它在本地计算机上的工作正常,它不断出现此错误.我一整天都在寻求解决方案,但没有成功.因此,如果有人可以帮助我,这将非常有帮助. 您也可以在github上找到它. :Github 错误HTTP Status 500 - Request processing failed; nested exception is javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not exec...