访问MySQL数据库错误！！！！

我访问的页面出现了异常（姑且先让我这么叫吧）  
提示信息如下：  
Communication  link  failure:  java.io.IOException,  underlying  cause:  Unexpected  end  of  input  stream  **  BEGIN  NESTED  EXCEPTION  **  java.io.IOException  MESSAGE:  Unexpected  end  of  input  stream  STACKTRACE:  java.io.IOException:  Unexpected  end  of  input  stream  at  com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:1096)  at  com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:626)  at  com.mysql.jdbc.Connection.createNewIO(Connection.java:1562)  at  com.mysql.jdbc.Connection.(Connection.java:491)  at  com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:346)  at  java.sql.DriverManager.getConnection(Unknown  Source)  at  java.sql.DriverManager.getConnection(Unknown  Source)  at  org.apache.jsp.DbJsp_jsp._jspService(DbJsp_jsp.java:69)  at  org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)  at  javax.servlet.http.HttpServlet.service(HttpServlet.java:803)  at  org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:328)  at  org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:315)  at  org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)  at  javax.servlet.http.HttpServlet.service(HttpServlet.java:803)  at  org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)  at  org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)  at  org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210)  at  org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)  at  org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)  at  org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)  at  org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)  at  org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)  at  org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:870)  at  org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)  at  org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)  at  org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)  at  org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685)  at  java.lang.Thread.run(Unknown  Source)  **  END  NESTED  EXCEPTION  **  
我感觉是访问MySQL数据库错误，请问这是怎么一回事？不是我不思考，而是我想了半天也没搞懂，在网上也找了一些相关的资料还是没解决，请各位帮我分析一下