springboot+jpa 单元测试的时候启动就报错了

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJp...

项目启动就报空指针异常

在使用idea开发时，启动项目后直接报出空指针异常

哈夫曼树，刚运行就报错了

[code=C/C++]rn#include "stdio.h"rn#include "conio.h"rn#include "string.h"rn#define Max 200rnrntypedef struct rn int selected;rn char name;rn char code[100];rn unsigned int weight;rn int lchild,rchild,parent;rn HTNode;rnHTNode HT[Max];rn/*------------------Init------------------*/rnvoid InitHT(int n)rnrn int i,m;rn m=2*n-1;rn for(i=0;iT[k].weight && T[k].selected==0)rn rn min=T[k].weight;rn index[i]=k;rn rn rn T[index[i]].selected=1;rnrn rnrn *s1=index[0];rn *s2=index[1];rnrnrnvoid HuffmanCoding(HTNode T[],int n)rnrn int i,m,s1,s2;rn m=2*n-1;rn for(i=n;iT[k].weight && T[k].selected==0)rn rn /*如果当前结点权值小于min且该结点未被选*/rn min=T[k].weight; /*则将当前结点权值赋给min，并将结点下标赋给index[i]*/rn index[i]=k; rn rn rn T[index[i]].selected=1;rn/*进行完一轮选择后，index[i]即为选出的权值最小的结点的下标，于是将选出的该结点的被选标志置1,因此下一轮选择时便会跳过此结点不选。rn然后继续在规定的数组结点中寻找第二个最小结点*/rn rn /*将选出的最小和次小结点的下标值分别赋给*s1和*s2*/ rn *s1=index[0];rn *s2=index[1];rnrn/*-------------------构造用于编码的哈夫曼树-------------------------------------------------*/rnvoid HuffmanCoding(HTNode T[],int n) rnrn /*参数n为要进行编码的结点数，也就是所构成的哈夫曼树的叶子结点数*/rn int i,m,s1,s2;rn m=2*n-1; /*m为该哈夫曼树的总结点数*/rn for(i=n;i

winxp 启动的时候报错了，怎么会这样？

今天早上开机的时候，winxp突然说启动错误，好像是缺少了system32厘的一个n*.*的文件，他要我修复。不过我重新启动以后就没事了。rnrn这是怎么回事？rnrn我装了98和xp两个系统。

刚启动时没事，重新部署时就报这个严重错误，怎么回事？？

严重: The web application [/native] created a ThreadLocal with key of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value [com.opensymphony.xwork2.inject.ContainerImpl$10@10a485c]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@14beb6]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.rn2011-8-25 9:16:13 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMaprn严重: The web application [/native] created a ThreadLocal with key of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value [com.opensymphony.xwork2.inject.ContainerImpl$10@10a485c]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@e37fe5]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.rn2011-8-25 9:16:13 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMaprn严重: The web application [/native] created a ThreadLocal with key of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value [com.opensymphony.xwork2.inject.ContainerImpl$10@10a485c]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@1e19d13]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.

[IDEA][SpringBoot]web项目刚启动就结束

第一次用idea建了一个web项目，运行出问题，问题点刚运行马上就关闭在build.gradle  中的 dependencies  中依赖标签providedRuntime 只会在runtime才会依赖进来，改成编译时依赖compile...

无缘无故就报错了~！！！！！！~！！！！！！！！！！！！！！！！！！

请尝试执行下列操作：rnrn单击刷新按钮，或稍后重试。rnrn打开 192.168.24.3:81 主页，然后查找与所需信息相关的链接。 rnHTTP 错误 500.100 - 内部服务器错误 - ASP 错误rnInternet 信息服务rnrn--------------------------------------------------------------------------------rnrn技术信息（用于支持人员）rnrn错误类型：rnMicrosoft VBScript 运行时错误 (0x800A000D)rn类型不匹配: 'formatnumber'rn/baobiao_yybghz.asp, 第 349 行rnrnrn浏览器类型：rnMozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 2.0.50727; MAXTHON 2.0) rnrn网页：rnGET /baobiao_yybghz.asp rnrn时间：rn2008年5月7日, 8:17:45 rnrnrn详细信息：rnMicrosoft 支持 rnrnrn代码是以前没改过的，以前可以运行，为什么无缘无故就不行了啊~！！！rn与IE设置有没有关系啊~！！！！！rn

springboot项目启动，但是访问报404错误

        今天在做一个springboot项目的时候，是接着别人的项目写的，写完之后想做一下测试，于是就启动了springboot，然后在放问的时候，一直包404的错误，然后百度了一下网上给的方法，包括注解使用@RestController，然后去除掉方法@RequestMapping(value = "/add")中的“value=”，这个方法对我无用，因为我的项目之前就是用的@RestC...

springboot 项目框架搭建(十一）：springboot项目启动的时候初始化资源

需求：要求在项目启动过程中，完成线程池的初始化，加密证书加载等功能，你会怎么做？   CommandLineRunner 定义初始化类 MyCommandLineRunner 实现 CommandLineRunner 接口，并实现它的 run() 方法，在该方法中编写初始化逻辑 注册成Bean，添加 @Component注解即可 示例代码如下： @Component publi...

各位看看哪里出错了，启动tomcat时候报错了！

各位看看哪里出错了，启动tomcat时候报错了！错误日志里的信息如下：2012-4-5 15:05:03 org.apache.catalina.startup.ContextConfig applicationWebConfigrn严重: Parse error in application web.xml file at jndi:/localhost/WEB-INF/web.xmlrnjava.lang.NullPointerExceptionrn at org.apache.xerces.framework.XMLParser.parse(XMLParser.java:1094)rn at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1644)rn at org.apache.catalina.startup.ContextConfig.applicationWebConfig(ContextConfig.java:369)rn at org.apache.catalina.startup.ContextConfig.start(ContextConfig.java:1062)rn at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:261)rn at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)rn at org.apache.catalina.core.StandardContext.start(StandardContext.java:4252)rn at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)rn at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)rn at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)rn at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:924)rn at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:887)rn at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:492)rn at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1147)rn at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)rn at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)rn at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)rn at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)rn at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)rn at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)rn at org.apache.catalina.core.StandardService.start(StandardService.java:516)rn at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)rn at org.apache.catalina.startup.Catalina.start(Catalina.java:578)rn at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)rn at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)rn at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)rn at java.lang.reflect.Method.invoke(Unknown Source)rn at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)rn at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)rnCaused by: java.lang.NullPointerExceptionrn at org.apache.xerces.readers.MIME2Java.convert(MIME2Java.java:784)rn at org.apache.xerces.readers.UTF8Recognizer.recognize(UTF8Recognizer.java:123)rn at org.apache.xerces.readers.DefaultReaderFactory.createReader(DefaultReaderFactory.java:160)rn at org.apache.xerces.readers.DefaultEntityHandler.startReadingFromDocument(DefaultEntityHandler.java:491)rn at org.apache.xerces.framework.XMLParser.parseSomeSetup(XMLParser.java:312)rn at org.apache.xerces.framework.XMLParser.parse(XMLParser.java:1080)rn ... 28 more

springboot 项目启动就闪退（解决方案）

<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency>

报错了报错了

for(int i=0;i<5;i++)rn //初始化格式rn SimpleDateFormat s=new SimpleDateFormat("yyyy/MM/dd");rn //下周周一到周五的日期rn int years=ca.get(Calendar.YEAR);rn int month=ca.get(Calendar.MONTH)+1;rn int day=ca.get(Calendar.DATE)+i+1;rn Date da=new Date();rn if(day<=31)rn String a1="years/month/day";rn da=s.parse(a1); //报错rn elsern String a2="years/(month+1)/(day-31)";rn da=s.parse(a2); //报错rn rn rnrn使用Calendar这个类里面的方法

启动tomcat4.1报错了－哪儿错了？

dos窗口的信息（部分）：rnrn2004-9-17 17:51:45 org.apache.commons.digester.Digester fatalErrorrn严重: Parse Fatal Error at line 13 column 2: The markup in the document followinrng the root element must be well-formed.rnorg.xml.sax.SAXParseException: The markup in the document following the root elernment must be well-formed.

jsp在运行的时候报错了

2012-9-24 10:55:16 org.apache.catalina.core.ApplicationDispatcher invokern严重: Servlet.service() for servlet jsp threw exceptionrnorg.apache.jasper.JasperException: /findCustomerAllResult.jsp(33,2) According to TLD or attribute directive in tag file, attribute items does not accept any expressionsrn at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)rn at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407)rn at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:148)rn at org.apache.jasper.compiler.Validator$ValidateVisitor.checkXmlAttributes(Validator.java:1209)rn at org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:846)rn at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1530)rn at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361)rn at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2411)rn at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2417)rn at org.apache.jasper.compiler.Node$Root.accept(Node.java:495)rn at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361)rn at org.apache.jasper.compiler.Validator.validateExDirectives(Validator.java:1763)rn at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:198)rn at org.apache.jasper.compiler.Compiler.compile(Compiler.java:347)rn at org.apache.jasper.compiler.Compiler.compile(Compiler.java:327)rn at org.apache.jasper.compiler.Compiler.compile(Compiler.java:314)rn at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:592)rn at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)rn at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)rn at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)rn at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)rn at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)rn at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)rn at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)rn at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)rn at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)rn at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)rn at com.BeifengQuote.Action.WebAction.forward(WebAction.java:20)rn at com.BeifengQuote.Action.CustomerFindAllAction.execute(CustomerFindAllAction.java:25)rn at com.BeifengQuote.Servlet.WebContral.doPost(WebContral.java:45)rn at com.BeifengQuote.Servlet.WebContral.doGet(WebContral.java:28)rn at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)rn at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)rn at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)rn at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)rn at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)rn at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)rn at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)rn at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)rn at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)rn at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)rn at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)rn at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)rn at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)rn at java.lang.Thread.run(Thread.java:619)rnorg.apache.jasper.JasperException: /findCustomerAllResult.jsp(33,2) According to TLD or attribute directive in tag file, attribute items does not accept any expressionsrn at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)rn at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407)rn at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:148)rn at org.apache.jasper.compiler.Validator$ValidateVisitor.checkXmlAttributes(Validator.java:1209)rn at org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:846)rn at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1530)rn at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361)rn at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2411)rn at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2417)rn at org.apache.jasper.compiler.Node$Root.accept(Node.java:495)rn at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361)rn at org.apache.jasper.compiler.Validator.validateExDirectives(Validator.java:1763)rn at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:198)rn at org.apache.jasper.compiler.Compiler.compile(Compiler.java:347)rn at org.apache.jasper.compiler.Compiler.compile(Compiler.java:327)rn at org.apache.jasper.compiler.Compiler.compile(Compiler.java:314)rn at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:592)rn at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)rn at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)rn at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)rn at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)rn at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)rn at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)rn at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)rn at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)rn at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)rn at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)rn at com.BeifengQuote.Action.WebAction.forward(WebAction.java:20)rn at com.BeifengQuote.Action.CustomerFindAllAction.execute(CustomerFindAllAction.java:25)rn at com.BeifengQuote.Servlet.WebContral.doPost(WebContral.java:45)rn at com.BeifengQuote.Servlet.WebContral.doGet(WebContral.java:28)rn at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)rn at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)rn at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)rn at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)rn at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)rn at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)rn at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)rn at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)rn at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)rn at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)rn at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)rn at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)rn at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)rn at java.lang.Thread.run(Thread.java:619)rn这是什么错误呀？？？rnrn

ProGuard混淆的时候报错了？？？

在用ProGuard进行操作的时候，报了以下错误？rnrnInitializing...rnWarning: org.jdom.xpath.JaxenXPath$NSContext: can't find superclass or interface org.jaxen.SimpleNamespaceContextrnNote: org.jdom.output.DOMOutputter calls '(org.jdom.adapters.DOMAdapter)Class.forName(variable).newInstance()'rnNote: com.borland.jbcl.editors.LookAndFeelEditor calls '(javax.swing.LookAndFeel)Class.forName(variable).newInstance()'rnWarning: com.borland.jbcl.editors.DirectoryEditor$0: can't find referenced field 'javax.swing.JTextField d' in class com.borland.jbcl.editors.DirectoryEditor$0rnWarning: com.borland.jbcl.editors.DirectoryEditor$0: can't find referenced field 'java.lang.String g' in class com.borland.jbcl.editors.FileNameCustomEditorrnWarning: com.borland.jbcl.view.f: can't find referenced method 'void a(com.borland.jbcl.view.f)' in class com.borland.jbcl.view.ColumnViewrnNote: there were 2 class casts of dynamically created class instances.rn You might consider explicitly keeping the mentioned classes and/orrn their implementations (using '-keep').rnWarning: there were 1 unresolved references to superclasses or interfaces.rn You may need to specify additional library jars (using '-libraryjars'),rn or perhaps the '-dontskipnonpubliclibraryclasses' option.rnWarning: there were 3 unresolved references to program class members.rn Your input classes appear to be inconsistent.rn You may need to recompile them and try again.rn If you are sure the mentioned classes are not used anyway,rn you could try your luck using the '-ignorewarnings' option.rnPlease correct the above warnings first.rn

jsp在查询的时候报错了

ps = conn.prepareStatement("select * from customer");在执行这条语句的时候一切正常输出rn //select top ? customercode, customername, phone, address, relationman,other from customer where customercode not in(select top ? customercode from customer) 但是执行这条语句却报出下面的错误rn //ps.setInt(1,page.getBeginIndex() ); page.getBeginIndex()=0;rn //ps.setInt(2,page.getEveryPage() ); page.getEveryPage()=5rn rs= ps.executeQuery();rnrnrncom.microsoft.sqlserver.jdbc.SQLServerException: '@P0' 附近有语法错误。rn at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDatabaseError(SQLServerException.java:197)rn at com.microsoft.sqlserver.jdbc.SQLServerStatement.getNextResult(SQLServerStatement.java:1493)rn at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.doExecutePreparedStatement(SQLServerPreparedStatement.java:390)rn at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement$PrepStmtExecCmd.doExecute(SQLServerPreparedStatement.java:340)rn at com.microsoft.sqlserver.jdbc.TDSCommand.execute(IOBuffer.java:4575)rn at com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand(SQLServerConnection.java:1400)rn at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeCommand(SQLServerStatement.java:179)rn at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeStatement(SQLServerStatement.java:154)rn at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.executeQuery(SQLServerPreparedStatement.java:283)rn at com.BeifengQuote.DaoImpl.CustomerDaoImpl.findCustomerAll(CustomerDaoImpl.java:215)rn at com.BeifengQuote.Action.CustomerFindAllAction.execute(CustomerFindAllAction.java:23)rn at com.BeifengQuote.Servlet.WebContral.doPost(WebContral.java:57)rn at com.BeifengQuote.Servlet.WebContral.doGet(WebContral.java:40)rn at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)rn at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)rn at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)rn at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)rn at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)rn at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)rn at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)rn at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)rn at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)rn at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)rn at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)rn at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)rn at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)rn at java.lang.Thread.run(Thread.java:619)rnrn这是什么错误呀？？

程序运行到“cn.open();” 就报错了

using System;rnusing System.Collections;rnusing System.ComponentModel;rnusing System.Data;rnusing System.Drawing;rnusing System.Web;rnusing System.Web.SessionState;rnusing System.Web.UI;rnusing System.Web.UI.WebControls;rnusing System.Web.UI.HtmlControls;rnusing System.Configuration;rnusing System.Data.SqlClient;rnrnrnnamespace TMSrnrnrn public class _Default : System.Web.UI.Pagern rn protected System.Web.UI.WebControls.TextBox tbx_uid;rn protected System.Web.UI.WebControls.TextBox tbx_upassword;rn protected System.Web.UI.WebControls.Button btn_login;rn protected System.Web.UI.WebControls.Label lbl_message;rn rn private void Page_Load(object sender, System.EventArgs e)rn rn // 在此处放置用户代码以初始化页面rn rn private void btn_login_Click(object sender, System.EventArgs e)rn rn rn string strconn= ConfigurationSettings.AppSettings["dsn"];rn rn SqlConnection cn= new SqlConnection (strconn);rnrn cn.Open ();rn rn string mysql= "select * from Users where Uid='"+tbx_uid.Text +"' and UPassword='"+tbx_upassword.Text +"'";rn rn SqlCommand cm=new SqlCommand (mysql,cn);rn rn SqlDataReader dr=cm.ExecuteReader ();rn if(dr.Read ())rn rn lbl_message.Text= "";rn rn Session["uid"]=dr["uid"].ToString ();rn Session["upower"]=dr["upower"].ToString ();rn lbl_message.Text="欢迎您！"+Session["uid"];rn if(Session["upower"].ToString ()=="1") rn rn Response.Redirect ("contractcount.aspx");rn rn else if(Session["upower"].ToString ()=="2") rn rn Response.Redirect ("contractlist.aspx");rn rn rn elsern rn lbl_message.Text ="对不起，您的用户名/密码不正确，请重新输入";rn rn //关闭连接rn cn.Close();rnrnrnrnrnrnweb.config代码：rnrn rn rnrnrnrn rnrnrn

hello world就报错了

安装完android studio，按照官方的开发流程新建了hello world，第一次运行很好，无任何错误。第二天开机后直接点运行然后出现红色提示如下：rnE/dalvikvm: Could not find class 'android.graphics.drawable.RippleDrawable', referenced from method android.support.v7.widget.AppCompatImageHelper.hasOverlappingRenderingrnrngoogle了下，说是模拟机版本太低，可问题是我第一次运行是没有错误啊，确定翻看过，而关机后再运行居然就有了。rnrn烦请指点下，谢谢了。rnrnrn截图：rn[img=https://img-bbs.csdn.net/upload/201702/13/1486983392_190144.png][/img]

启动oracle是报错了

我在启动oracle报了下面的错误rnrnjava.lang.NullPointerExceptionrn at oracle.ewt.lwAWT.BufferedApplet.(Unknown Source)rn at oracle.net.ca.NetCA.(Unknown Source)rn at oracle.net.ca.NetCA.main(Unknown Source)rnOracle Net Services configuration failed. The exit code is -1rnrn各位大虾该怎么解决阿

多对多关系的时候，报错了

报错:rnException in thread "main" org.springframework.orm.hibernate3.HibernateSystemException: illegal access to loading collection; nested exception is org.hibernate.LazyInitializationException: illegal access to loading collectionrnCaused by: org.hibernate.LazyInitializationException: illegal access to loading collectionrn at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:341)rn at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:86)rn at org.hibernate.collection.PersistentSet.hashCode(PersistentSet.java:411)rn at wind.rose.crm.entity.Product.hashCode(Product.java:74)rn at java.util.HashMap.put(HashMap.java:372)rn at java.util.HashSet.add(HashSet.java:200)rn at java.util.AbstractCollection.addAll(AbstractCollection.java:305)rn at org.hibernate.collection.PersistentSet.endRead(PersistentSet.java:329)rn at org.hibernate.engine.CollectionLoadContext.endLoadingCollection(CollectionLoadContext.java:183)rn at org.hibernate.engine.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:268)rn at org.hibernate.engine.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:249)rn at org.hibernate.loader.Loader.endCollectionLoad(Loader.java:866)rn at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:853)rn at org.hibernate.loader.Loader.doQuery(Loader.java:717)rn at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)rn at org.hibernate.loader.Loader.loadCollection(Loader.java:1985)rn at org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:36)rn at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:565)rn at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:60)rn at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1716)rn at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:344)rn at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:86)rn at org.hibernate.collection.PersistentSet.hashCode(PersistentSet.java:411)rn at wind.rose.crm.entity.Order.hashCode(Order.java:79)rn at java.util.HashMap.put(HashMap.java:372)rn at java.util.HashSet.add(HashSet.java:200)rn at java.util.AbstractCollection.addAll(AbstractCollection.java:305)rn at org.hibernate.collection.PersistentSet.endRead(PersistentSet.java:329)rn at org.hibernate.engine.CollectionLoadContext.endLoadingCollection(CollectionLoadContext.java:183)rn at org.hibernate.engine.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:268)rn at org.hibernate.engine.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:249)rn at org.hibernate.loader.Loader.endCollectionLoad(Loader.java:866)rn at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:853)rn at org.hibernate.loader.Loader.doQuery(Loader.java:717)rn at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)rn at org.hibernate.loader.Loader.loadCollection(Loader.java:1985)rn at org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:36)rn at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:565)rn at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:60)rn at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1716)rn at org.hibernate.collection.AbstractPersistentCollection.forceInitialization(AbstractPersistentCollection.java:454)rn at org.hibernate.engine.StatefulPersistenceContext.initializeNonLazyCollections(StatefulPersistenceContext.java:755)rn at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:229)rn at org.hibernate.loader.Loader.doList(Loader.java:2211)rn at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2095)rn at org.hibernate.loader.Loader.list(Loader.java:2090)rn at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:388)rn at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:338)rn at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:172)rn at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1121)rn at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)rn at org.springframework.orm.hibernate3.HibernateTemplate$30.doInHibernate(HibernateTemplate.java:857)rn at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366)rn at org.springframework.orm.hibernate3.HibernateTemplate.findByNamedParam(HibernateTemplate.java:848)rn at org.springframework.orm.hibernate3.HibernateTemplate.findByNamedParam(HibernateTemplate.java:839)rn at wind.rose.crm.customer.persist.impl.OrderDaoImpl.findProductByName(OrderDaoImpl.java:27)rn at wind.rose.crm.customer.service.impl.OrderServiceImpl.findByProductName(OrderServiceImpl.java:42)rn at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)rn at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)rn at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)rn at java.lang.reflect.Method.invoke(Method.java:597)rn at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:288)rn at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:181)rn at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:148)rn at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:100)rn at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:170)rn at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:176)rn at $Proxy10.findByProductName(Unknown Source)rn at test.Test.main(Test.java:54)rn

换到eclipse就报错了

不知道为什么会报这个错误，在myeclipse下完全没有错误，换到eclipse报错了rnrn[code=java]package org.mopon.demo1;rnrnimport javax.annotation.PostConstruct;rnimport javax.annotation.PreDestroy;rnimport javax.sql.DataSource;rnrnimport org.springframework.beans.factory.annotation.Autowired;rnimport org.springframework.context.annotation.Scope;rnimport org.springframework.stereotype.Repository;rnrn@Repository("userDao")//用来标注访问层rn@Scope("prototype")//用来保证每次有访问都会创建一个不同的对象 因为spring中的bean默认为单例模式（singleton）rnpublic class JdbcUserDao implements UserDaornrn @Autowiredrn private DataSource ds;rn rn @PostConstructrn public void init()rn System.out.println("初始化方法");rn rn rn @PreDestroy //rn public void destroy()rn System.out.println("销毁方法");rn rn rn public void findByName() rn System.out.println("查询用户信息");rn rnrnrn[/code]rnrnrnException in thread "main" org.springframework.beans.factory.BeanDefinitionStoreException: Failed to read candidate component class: file [C:\Users\lenovo\workspace\spring_day03\build\classes\org\mopon\demo1\JdbcUserDao.class]; nested exception is org.springframework.core.NestedIOException: ASM ClassReader failed to parse class file - probably due to a new Java class file version that isn't supported yet: file [C:\Users\lenovo\workspace\spring_day03\build\classes\org\mopon\demo1\JdbcUserDao.class]; nested exception is java.lang.IllegalArgumentExceptionrn at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents(ClassPathScanningCandidateComponentProvider.java:290)rn at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.doScan(ClassPathBeanDefinitionScanner.java:242)rn at org.springframework.context.annotation.ComponentScanBeanDefinitionParser.parse(ComponentScanBeanDefinitionParser.java:84)rn at org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:73)rn at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1438)rn at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1428)rn at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:195)rn at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:139)rn at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:108)rn at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:493)rn at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390)rn at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:334)rn at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302)rn at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:174)rn at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:209)rn at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180)rn at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:243)rn at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:127)rn at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:93)rn at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:130)rn at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:537)rn at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:451)rn at org.springframework.context.support.ClassPathXmlApplicationContext.(ClassPathXmlApplicationContext.java:139)rn at org.springframework.context.support.ClassPathXmlApplicationContext.(ClassPathXmlApplicationContext.java:83)rn at org.mopon.demo1.test.main(test.java:10)rnCaused by: org.springframework.core.NestedIOException: ASM ClassReader failed to parse class file - probably due to a new Java class file version that isn't supported yet: file [C:\Users\lenovo\workspace\spring_day03\build\classes\org\mopon\demo1\JdbcUserDao.class]; nested exception is java.lang.IllegalArgumentExceptionrn at org.springframework.core.type.classreading.SimpleMetadataReader.(SimpleMetadataReader.java:56)rn at org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:80)rn at org.springframework.core.type.classreading.CachingMetadataReaderFactory.getMetadataReader(CachingMetadataReaderFactory.java:102)rn at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents(ClassPathScanningCandidateComponentProvider.java:266)rn ... 24 morernCaused by: java.lang.IllegalArgumentExceptionrn at org.springframework.asm.ClassReader.(Unknown Source)rn at org.springframework.asm.ClassReader.(Unknown Source)rn at org.springframework.asm.ClassReader.(Unknown Source)rn at org.springframework.core.type.classreading.SimpleMetadataReader.(SimpleMetadataReader.java:53)rn ... 27 morern

刚学会写函数,一用就报错了~

刚学PHP,写个函数用来绘制img标签,,但报错,求解~rnrnfunction draw_img($src,$class,$id,$other,$insert)rn$str=''.$insert.'';rnreturn $str;rnrnrnrnecho draw_img(MYIMAGESPATH.'icons/E-mail.png';)rnrnrn错误内容:rnParse error: syntax error, unexpected ';' in F:\PHP\www\htdocs\MyLife\Index.php on line 39

项目刚运行的时候

在项目刚打开运行的时候 记得 千万不要随意的去改东西  不然很容易报错 ，记住 千万 千万  千万不要动。 一定要等到项目运行完成的时候再说，

项目启动报内存溢出

项目启动，地址栏输入访问路径竟然报内存溢出：错误信息截图如下：解决方法如下：-Xms1024m -Xmx1024m -XX:PermSize=1024m -XX:MaxPermSize=1024M  start如果启动还是一直停在那个页面，后台报Exception in thread &quot;http-bio-8080-exec-3&quot; ，解决方案如下：在后面添加如下这段配置，不够自己可以调：-Xms25...

项目启动报的错

 项目是从ftp上下载的   直接放到了resin服务器的webapps下 项目启动完之后报出 表或视图不存在  各位大神 求问从哪里看 什么表不存在  11:21:32.896] com.runqian.report.view.SetDefaultTagProps: init[11:21:33.020] Socket JNI library is not available.[11:21:33....

springboot启动报404错误 无法访问

最常见的问题就是controller控制类不在启动类所在的目录下的或其子目录中

启动项目开始轮播图

MainActivity中继承封装类BaseActivity 功能：轮播图划到最后一张点击跳转主页面 package com.bwie.newsmonth04; import android.content.Intent; import android.content.SharedPreferences; import android.support.annotation.NonNull; imp...

加了就Toast就报错了

Toast.makeText(ResultRouteActivity.this,forAttractionsList.size(),Toast.LENGTH_SHORT).show(); 好像是整数值就会被解析成其他的东西，造成报错，改成字符串就可以了 Toast.makeText(ResultRouteActivity.this,"共"+forAttractionsList.size(),T

SpringBoot项目启动

SpringBoot项目启动 构建maven项目 1、访问 http://start.spring.io/ 2、选择构建项目，上面的下拉列表中选择maven project，with java，Spring Boot版本选择要使用的，修改group、Artifact。 3、点击Generate Project下载项目压缩包 4、使用eclipse，Import -&amp;amp;gt;Maven -&amp;amp;gt; ...

配置和启动 SpringBoot项目

本课程案例项目框架使用SSM组合框架，基于SpringBoot结构。让目前正在学习 JavaEE 开发的同学能够快速了解web系统的经典RBAC权限设计和实现。

springboot项目启动问题

rnrnrnrn如图 数据库连接设置为本地就启动不起来 停在这里 换为阿里云就启动正常 什么情况rnrnrn下面这个图片是连接换成阿里云后启动正常rnrnrnrnrnrn以下是数据库配置：rnspring.application.name = xmzjcqglrnserver.port = 8529rnspring.datasource.type=com.alibaba.druid.pool.DruidDataSourcernspring.datasource.driver-class-name=com.mysql.cj.jdbc.Driverrnspring.datasource.url=jdbc:mysql://39.98.209.181:3306/history_as10_order?useUnicode=true&characterEncoding=UTF-8rnspring.datasource.username=dogrnspring.datasource.password=riskdevrnrn#spring.datasource.url=jdbc:mysql://localhost:3306/history_as10_order?seSSL=truern#spring.datasource.username=rootrn#spring.datasource.password=rootrn#spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driverrn#spring.jpa.properties.hibernate.hbm2ddl.auto=updaternrnmybatis.type-aliases-package=com.example.xmzjcqgl.modelrnmybatis.mapper-locations=classpath:mybatis/*.xmlrnrnrnmaxHttpHeaderSize="1"rnrn#编码格式rncharset=UTF-8rnrn

springboot项目main函数启动

在controller包下新建appController类 package controller; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.b...

springboot 随项目启动

https://www.cnblogs.com/huhongy/p/8183390.html https://blog.csdn.net/huxu981598436/article/details/79557696

Springboot项目启动监听

import org.springframework.context.ApplicationListener; import org.springframework.context.event.ContextRefreshedEvent; import org.springframework.stereotype.Component; import com.ax.dmp.util.TagUti...

springboot项目启动类型

### pom.xml新增插件 &amp;lt;build&amp;gt; &amp;lt;plugins&amp;gt; &amp;lt;plugin&amp;gt; &amp;lt;groupId&amp;gt;org.springframework.boot&amp;lt;/groupId&amp;gt; &amp;lt;artifactId&amp;gt;spring-boot-maven-plugin&amp;lt;/artifactId&amp;gt; &am

SpringBoot项目服务器启动

在不使用独立的tomcat，不执行main函数的情况下，通常使用以下方式对springboot项目进行部署与运行 jar执行 通过命令java -jar test.jar运行springboot项目jar包，缺陷在于无法关闭控制台或进行其他系统命令操作 maven 使用maven能够以一种类似于shell的方式开启、关闭、重启服务，让项目能够在服务器后台运行。 (1) 首先在项目中添加maven...

springboot 项目启动shell脚本

测试环境启动springboot项目脚本 适用应用结构 app |-config/x.yml |-logs/x.log |-xx.jar |-appserver   脚本支持start|stop|state|restart 其中stop默认用kill -15,restart 默认-15 等待30秒未正常关闭用-9强制关闭     #!/bin/sh export LA...

SpringBoot命令启动项目

1：命令行启动项目    使用命令 cd 切换到项目所在的目录    使用命令mvn install 执行命令 生成相关文件夹target 并生成相关jar文件    cd 进入target目录  执行java -jar demo-0.0.1-SNAPSHOT.jar 启动项目（jar文件是生成的jar包）2：直接使用spring-boot命令启动    mvn spring-boot:run执行...

springboot框架电商项目

springboot电商项目之易买网，完整的pom.xml配置，jsp页面，有购物车，三级分类和后台管理功能

springboot项目框架

   项目介绍 面向学习型的开源框架，简洁高效，减少过渡封装，展现技术本质 Springboot作为基础框架，使用mybatis作为持久层框架 使用官方推荐的thymeleaf做为模板引擎，shiro作为安全框架,主流技术，“一网打尽” 极简配置，一键前后台代码生成    获取源码 Github地址：https://github.com/lcg0124/bootdo.git Oschi...

相关热词 c# 去空格去转义符 c#用户登录窗体代码 c# 流 c# linux 可视化 c# mvc 返回图片 c# 像素空间 c# 日期 最后一天 c#字典序排序 c# 截屏取色 c#中的哪些属于托管机制