最近开始学Java了.有C#底子,但是学起来Java还是很吃力,感觉别人架好了各种包,自己只要调用就行了,结果还有各种bug出现.掩面中. 启动Tomcat的时候,报错The Apache Tomcat installation at this directory is version 8.5.32. A Tomcat 8.0 installation is expected. 参考别人答案得知,eclipse最高只支持Tomcat8.0.修改下配置,欺骗下eclipse就行. 找到这个jar…
Eclipse配置tomcat8.5.7报错:The Apache Tomcat installation at this directory is version 8.5.27. A Tomcat 8.0 installation is... 在eclipse中配置tomca8.5.7t时,遇到了一个报错,如下所示: 的Tomcat的版本是8.5.27,报这个错的原因是ellipse里面限制Tomcat的最高版本是8.0的,我用的tomcat的版本明显高于eclipse的要求:具体的改法如下:…
今天遇到的其他一个问题就是,启动tomcat时,报:java.lang.NullPointerException at org.apache.jsp.**_jsp.jspInit(index_jsp.java)异常,因为我刚刚配置服务器,以为JSP页面出现了问题,不过写了一个空的JSP页面依旧是,后来才知道,jar包冲突导致的,我在tomcat的lib目录下放了jsp-api.jar的jar包,而项目中最初也一直有一个这个jar包,方法产生了冲突.解决办法就是删除掉项目里WEB-INF/lib下…
环境:myeclipse+tomcat6+jdk6 今天搭建了一个Java Web项目,访问index.jsp时报如下错误: 严重: Servlet.service() for servlet jsp threw exceptionjava.lang.NullPointerException at org.apache.jsp.front.index_jsp._jspInit(index_jsp.java:30) at org.apache.jasper.runtime.HttpJs…
Exception in thread "main" java.lang.Error: Unresolved compilation problem: at com.niuniu.practice.QRCodeEncoderHandler.main(QRCodeEncoderHandler.java:80) 原因:没有引入正确的包. org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or…
自己写了个最简单的springMVC项目练练手,没有用maven,在WebContent中新建了lib文件夹,将jar包复制到这里面,然后add to build path到项目里. 启动Tomcat,报错,启动不起来.在网页中运行localhost:8080发现Tomcat页面是可以打开的. 报错内容如下: 严重: A child container failed during start java.util.concurrent.ExecutionException: org.apache.…
今天开发犯了一个特lowB的错,记录下来,引以为戒! 严重: A child container failed during start java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/UpLoadE…
错误如下: A child container failed during startjava.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].StandardContext 还有一种错误是: org.springframework.web.Spr…
IDEA版本:14.1 maven版本:apache-maven-3.3.9-bin IDEA的maven项目,在pom文件执行Maven--Reimport,引入jar包依赖,报错java.lang.RuntimeException: Class "org.apache.maven.cli.MavenCli$CliRequest" not found 解决办法: 更换低版本maven,apache-maven-3.1.1.即可解决问题…
http://curator.apache.org/index.html Welcome to Apache Curator What is Curator? Curator n ˈkyoor͝ˌātər: a keeper or custodian of a museum or other collection - A ZooKeeper Keeper. Apache Curator is a Java/JVM client library for Apache ZooKeeper, a di…
问题: SEVERE: An incompatible version 1.1.27 of the APR based Apache Tomcat Native library is installed, while Tomcat requires version 1.1.32 解决方法: http://tomcat.apache.org/ >https://archive.apache.org/dist/tomcat/tomcat-connectors/native/ >https://ar…
读取以下两种格式的Excel : *.xls and *.xlsx 用Apache POI API来实现,需要用到 HSSF 和 XSSF 的类库 HSSF is the POI Project's pure Java implementation of the Excel '97(-2007) (.xls) file format. XSSF is the POI Project's pure Java implementation of the Excel 2007 OOXML (.xls…