Context体现在server.xml中的Host里的<Context>元素，它由Context接口定义。每个<Context>元素代表了运行在虚拟主机上的单个Web应用。

<Context>元素：

      <Host name="localhost"  appBase="webapps"unpackWARs="true" autoDeploy="true"><!-- SingleSignOn valve, share authentication between web applicationsDocumentation at: /docs/config/valve.html --><!--<Valve className="org.apache.catalina.authenticator.SingleSignOn" />--><!-- Access log processes all example.Documentation at: /docs/config/valve.htmlNote: The pattern used is equivalent to using pattern="common" --><Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"prefix="localhost_access_log" suffix=".txt"pattern="%h %l %u %t "%r" %s %b" /><Context docBase="/var/www/java/pen/pen.war" path="/pen" debug="0"  reloadable="true"/></Host>

    upstream https_tomcat_web{server 127.0.0.1:8080 ;}server {listen       443 ssl;server_name  iot.iot.com;location /{proxy_pass http://localhost:8080;proxy_set_header Host    $host; proxy_set_header X-Real-IP  $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;}ssl_certificate       /usr/local/cert/1732985_iot.iot.com.pem;ssl_certificate_key   /usr/local/cert/1732985_iot.iot.com.key;# ssl_session_cache    shared:SSL:1m;ssl_session_timeout  5m;ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;ssl_protocols TLSv1 TLSv1.1 TLSv1.2;ssl_prefer_server_ciphers on;root /var/www/java/pen;# passenger_enabled on;#rails_env production;}

修改后重启nginx 在浏览器https://iot.iot.com/pen/** 可以正常的请求