classnotfoundexception

问题 I\'m using Eclipse 3.7 (STS) with Tomcat 7 running inside the IDE. I\'ve created a new Dynamic Web project and added a single JSP file to the web content root folder. I can run Tomcat and access the JSP from within Eclipse with no problems. I\'ve added a few 3rd party JAR\'s to the project from User Libraries (I\'m not using maven or auto dependecies managment). In the JSP I reference a class from the project\'s JAR file, I can compile this with no problem, but when I deploy on Tomcat the JSP

问题 I am trying to connect to mysql database using java on windows7. In spite of adding the complete url of jdbcdriver jar file in CLASSPATH, java.lang.ClassNotFoundException: com.mysql.jdbc.Driver is thrown. Could anyone tell me what i am missing here? It works if I add the jar file in project library but I want to do it by CLASSPATH itself. My classpath looks like this- C:\\jython2.5.1\\javalib\\mysql-connector-java-5.1.12-bin.jar I want to make it clear that this is not the actual project i am

问题 I included: all Spring libs , Apache Tomcat 7.0 library in Build Path but it still gives errors: SEVERE: Error configuring application listener of class org.springframework.web.context.ContextLoaderListener java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1676) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1521) at org.apache.catalina.core

问题 There is a VERY similar question to mine but in my case I don\'t have any duplicate jars in my build path, so the solution does not work for me. I\'ve searched google for a couple of hours now, but none of the solutions I\'ve found there actually resolve my issue. I\'m creating a web site with some database connectivity for a homework. I\'m using a MySQL database, developing in Eclipse and running on Windows. I keep getting java.lang.ClassNotFoundException: com.mysql.jdbc.Driver with the

问题 This question already has an answer here: Libraries do not get added to APK anymore after upgrade to ADT 22 7 answers Some time ago I developed a rather simple app, with a target of 4.2.2. I had it working normally in my device. Then I stopped development for about 1 month. After the recent Google I/O, I decided to come back to development. What I first did was open the Android SDK Manager and update to the newly available packages (I think it was only the SDK tools, platform tools, and not

问题 What is the difference between NoClassDefFoundError and ClassNotFoundException ? What causes them to be thrown? How can they be resolved? I often encounter these throwables when modifying existing code to include new jar files. I have hit them on both the client side and the server side for a java app distributed through webstart. Possible reasons I have come across: packages not included in build.xml for the client side of code runtime classpath missing for the new jars we are using version

问题 I am trying to run a Java application, but getting this error: java.lang.ClassNotFoundException: After the colon comes the location of the class that is missing. However, I know that that location does not exist since the class is located elsewhere. How can I update the path of that class? Does it have something to do with the class path? 回答1: Your classpath is broken (which is a very common problem in the Java world). Depending on how you start your application, you need to revise the

问题 The common problems when building and deploying Spark applications are: java.lang.ClassNotFoundException . object x is not a member of package y compilation errors. java.lang.NoSuchMethodError How these can be resolved? 回答1: Apache Spark's classpath is built dynamically (to accommodate per-application user code) which makes it vulnerable to such issues. @user7337271's answer is correct, but there are some more concerns, depending on the cluster manager ("master") you're using. First, a Spark