HTTP Status 500 -  -------------------------------------------------------------------------------- type Exception report message  description The server encountered an internal error () that prevented it from fulfilling this request. exception  javax.servlet.ServletException: install failed! com.jeecms.cms.InstallServlet.doPost(InstallServlet.java:71) javax.servlet.http.HttpServlet.service(HttpServlet.java:647) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) root cause  com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 1,329,979,228,261 milliseconds ago.  The last packet sent successfully to the server was 0 milliseconds ago. sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) java.lang.reflect.Constructor.newInstance(Unknown Source) com.mysql.jdbc.Util.handleNewInstance(Util.java:406) com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1074) com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2214) com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:773) com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46) sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) java.lang.reflect.Constructor.newInstance(Unknown Source) com.mysql.jdbc.Util.handleNewInstance(Util.java:406) com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:352) com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:282) java.sql.DriverManager.getConnection(Unknown Source) java.sql.DriverManager.getConnection(Unknown Source) com.jeecms.cms.Install.createDb(Install.java:68) com.jeecms.cms.InstallServlet.doPost(InstallServlet.java:39) javax.servlet.http.HttpServlet.service(HttpServlet.java:647) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) root cause  com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 1,329,979,228,261 milliseconds ago.  The last packet sent successfully to the server was 0 milliseconds ago. sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) java.lang.reflect.Constructor.newInstance(Unknown Source) com.mysql.jdbc.Util.handleNewInstance(Util.java:406) com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1074) com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:341) com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2137) com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:773) com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46) sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) java.lang.reflect.Constructor.newInstance(Unknown Source) com.mysql.jdbc.Util.handleNewInstance(Util.java:406) com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:352) com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:282) java.sql.DriverManager.getConnection(Unknown Source) java.sql.DriverManager.getConnection(Unknown Source) com.jeecms.cms.Install.createDb(Install.java:68) com.jeecms.cms.InstallServlet.doPost(InstallServlet.java:39) javax.servlet.http.HttpServlet.service(HttpServlet.java:647) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) root cause  java.net.ConnectException: Connection refused: connect java.net.PlainSocketImpl.socketConnect(Native Method) java.net.PlainSocketImpl.doConnect(Unknown Source) java.net.PlainSocketImpl.connectToAddress(Unknown Source) java.net.PlainSocketImpl.connect(Unknown Source) java.net.SocksSocketImpl.connect(Unknown Source) java.net.Socket.connect(Unknown Source) java.net.Socket.connect(Unknown Source) java.net.Socket.<init>(Unknown Source) java.net.Socket.<init>(Unknown Source) com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:253) com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:290) com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2137) com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:773) com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46) sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) java.lang.reflect.Constructor.newInstance(Unknown Source) com.mysql.jdbc.Util.handleNewInstance(Util.java:406) com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:352) com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:282) java.sql.DriverManager.getConnection(Unknown Source) java.sql.DriverManager.getConnection(Unknown Source) com.jeecms.cms.Install.createDb(Install.java:68) com.jeecms.cms.InstallServlet.doPost(InstallServlet.java:39) javax.servlet.http.HttpServlet.service(HttpServlet.java:647) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) note The full stack trace of the root cause is available in the Apache Tomcat/*.27 logs.

你好，你可以参考http://www.jeecms.com/rjaz/325.jhtml

你的环境搭建好了吗？请参考http://www.jeecms.com/hjdj/index.jhtml

回复第3楼谢谢！是我原来装的mysql有问题，我昨天卸载了mysql重安装一个就行了！只是今天在导入MyEclipse的时候遇到了些问题，导入源代码后再导入jar包后还是有两个包出现红叉,出现在com.jeecms.common.web和com.jeecms.common.web.freemarker这两包，不知道怎么解决啊？望版主提示提示，谢谢！

首先删除3个关于源码的jar包，jeecms-cms-lc-identity-2012-beta.jar、jeecms-common-2012-beta.jar，jeecms-core-lc-identity-2012-beta.jar。

然后导入common-lib下的3个jar包jug-2.0.0.jar、memcachedclient-2.0.1.jar、spymemcached-2.3.1.jar
这步执行了吗？

选择编码为UTF-8

这包有没有导进来

回复第7楼以前我导入的错了，我参照别人的错了，这次除了这步其他的都正确，您现在显示的是自己导入tomcat下的lib吗？但是我用的myeclipse8.6,不大清楚从两个中那个引入啊

你参考　http://www.jeecms.com/rjaz/325.jhtml　　需要注意的是把WEB-INF/classes下的4个配置文件复制到src下就可以了