Tomocat：安装完成，显示HTTP Status 404

  今天在配置服务器，并且安装完成，tomocat服务器也正常运行的情况下，点击login，界面显示HTTP Status 404，这让我百思不得其解，于是就开始了我的分析之路：错误如图（不过404的界面似乎都长这样）

1：查看tomocat服务器是否正常运行，查看web服务器的运行时长，发现刷新时间正常；

2：查看login时打开的html界面login.html是否存在，找到相应路径下查看login.html，单独以浏览器的方式打开正常；

3：以可视化的界面打开tomocat或者直接在logs中查看日志，直接查看错误原因；

2017-6-27 14:23:23 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
严重: The web application [/gpsweb] registered the JDBC driver [com.microsoft.sqlserver.jdbc.SQLServerDriver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
2017-6-27 14:23:23 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/gpsweb] appears to have started a thread named [Timer-1] but has failed to stop it. This is very likely to create a memory leak.
2017-6-27 14:23:23 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/gpsweb] appears to have started a thread named [Thread-8] but has failed to stop it. This is very likely to create a memory leak.
2017-6-27 14:23:23 org.apache.coyote.http11.Http11Protocol start
信息: Starting Coyote HTTP/1.1 on http-8080
2017-6-27 14:23:23 org.apache.jk.common.ChannelSocket init
信息: JK: 

　　

出现如图所示原因，E:Program Files (x86)tomcatconfCatalinalocalhost，找到如下路径，删除下面两个xml文件，重启tomocat

4：出现如下错误：

驱动程序无法通过使用安全套接字层(SSL)加密与 SQL Server 建立安全连接

  则应该查看数据库端口是否能通。sql server 的端口为1433 cmd--telnet ip 1433，查看1433端口。

 如果无法确认是否为数据库链接问题，则可以通过修改jdbc文件链接到其他1433端口通的数据库，查看服务能否正常启动

Caused by: com.microsoft.sqlserver.jdbc.SQLServerException: 驱动程序无法通过使用安全套接字层(SSL)加密与 SQL Server 建立安全连接。错误:“java.lang.RuntimeException: Could not generate DH keypair”。
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.terminate(SQLServerConnection.java:1368)
        at com.microsoft.sqlserver.jdbc.TDSChannel.enableSSL(IOBuffer.java:1412)
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLServerConnection.java:1058)
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:833)
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:716)
        at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.java:841)
        at org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38)
        at org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:294)
        at org.apache.commons.dbcp.B