NN主题的文章列表，还有NN的技术要点_第207页

org.springframework.cache.interceptor.SimpleKey cannot be cast to java.lang.String

springboot整合redis时，使用@Cacheable注解，如果方法的key参数为空，就会报org.springframework.cache.interceptor.SimpleKeycannotbecasttojava.lang.String的错误。♛1错误信息org.springframework.cac...

代码星球 ·2020-04-05

SRCNN

SRCNN（超分辨率卷积神经网络）网络结构 l Conv1:f1=9*9activation=‘relu’l Conv2:f2=1*1activation=‘relu’ #为了非线性映射增强非线性l ...

代码星球 ·2020-04-04

Caused by: redis.clients.jedis.exceptions.JedisConnectionException: java.net.SocketTimeoutException: connect timed out

问题：java连接不上redis。异常信息：Caused by: redis.clients.jedis.exceptions.JedisConnectionException: java.net.SocketTimeoutException: connect time...

代码星球 ·2020-04-04

HikariCP 脑火Failed to obtain JDBC Connection: You need to run the CLI build and you need target/classes in your classpath to run.

测试了一下HikariCP连接池报错，无解十一月16,20175:31:59下午org.apache.catalina.core.StandardContextloadOnStartup严重:Servlet[InitTaskServlet]inwebapplication[]threwload()exceptionor...

代码星球 ·2020-04-04

Tomcat启动log打印到INFO: At least one JAR was scanned for TLDs yet contained no TLD各种解决方式

问题：启动tomcat时，catalina.out日志打印到如下内容就停止不动了，也不报错SEVERE:FarmWarDeployercanonlyworkashostclustersubelement!Dec02,20164:27:39PMorg.apache.catalina.startup.HostConfigd...

代码星球 ·2020-04-04

An annotation based command line parser

Java命令行选项解析之Commons-CLI&Args4J&JCommanderhttp://rensanning.iteye.com/blog/2161201ThisisanannotationbasedparameterparsingframeworkforJava8. Hereisaq...

代码星球 ·2020-04-04

MIT KIT OpenID Connect Demo Client

Youare NOT currentlyloggedin.Thisexampleapplicationisconfiguredwithseveralpagesrequiringdifferentlevelsofaccess.Thispagedoesnotrequiretheusertobelogge...

代码星球 ·2020-04-04

com.github.pagehelper.PageHelper cannot be cast to org.apache.ibatis.plugin.Interceptor

<dependency><groupId>com.github.pagehelper</groupId><artifactId>pagehelper</artifactId><version>4.0.0</version>&...

代码星球 ·2020-04-04

没有连接的AMQP / RabbitMQ通道何时死亡？(when does an AMQP/RabbitMQ channel with no connections die?)

IhaveasimpleRabbitMQtestprogramrandomlyenqueuingmessages,andanotherreadingthem,allusingSpring-AMQP.Iftheconsumerdies(forexamplekillingaprocesswithouthavin...

代码星球 ·2020-04-04

Tomcat-connector的微调(1): acceptCount参数

对于acceptCount这个参数，含义跟字面意思并不是特别一致（个人感觉），容易跟maxConnections,maxThreads等参数混淆；实际上这个参数在tomcat里会被映射成backlog:static{replacements.put("acceptCount","backlog");replacemen...

代码星球 ·2020-04-04

java.sql.SQLException: connection holder is null

###Cause:java.sql.SQLException:connectionholderisnull;uncategorizedSQLExceptionforSQL[];SQLstate[null];errorcode[0];connectionholderisnull;nestedexception...

代码星球 ·2020-04-04

maven warnning 'build.plugins.plugin.version' is missing

裝完maven后，package或clean时出错：[WARN][WARN]Someproblemswereencounteredwhilebuildingtheeffectivemodel [WARN]'build.plugins.plugin.version'ismissingfororg.a...

代码星球 ·2020-04-04

一次SocketException：Connection reset 异常排查

问题描述上一期的需求上线之后，线上多了一个异常：Connectionreset。如下：[2017-03-2200:45:00ERROR][creativeAuditTaskScheduler_Worker-9](cn.com.ServiceImpl:169)-getAuditResultexception,callad...

代码星球 ·2020-04-04

彻底掌握网络通信（七）ConnectionReuseStrategy，ConnectionKeepAliveStrategy解析

网络通信系列文章序彻底掌握网络通信（一）Http协议基础知识彻底掌握网络通信（二）Apache的HttpClient基础知识彻底掌握网络通信（三）Android源码中HttpClient的在不同版本的使用彻底掌握网络通信（四）Android源码中HttpClient的发送框架解析彻底掌握网络通信（五）Def...

代码星球 ·2020-04-04

mybatis-generator插件执行报错：Cannot resolve classpath entry

记录一个小问题使用了mybatis-generator插件自动生成实体类，DAO，Mapper，在执行时报错。报错信息如下Failedtoexecutegoalorg.mybatis.generator:mybatis-generator-maven-plugin:1.3.5:generate(defaul...

代码星球 ·2020-04-04