在服务器上找到tomcat目录下的conf/server.xml 找到以下并加上这句话，重启tomcat便实现。
<Context docBase="/usr/local/images" path="/images" debug="0" reloadable="true" />
/usr/local/images为图片路径，/images为别名 访问http://*****:8080/images/wangyuan.jpg
<Host name="localhost" appBase="webapps"
unpackWARs="true" autoDeploy="true">
<!-- SingleSignOn valve, share authentication between web applications
Documentation at: /docs/config/valve.html -->
<!--
<Valve className="org.apache.catalina.authenticator.SingleSignOn" />
-->
<!-- Access log processes all example.
Documentation at: /docs/config/valve.html
Note: 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="/usr/local/images" path="/images" debug="0" reloadable="true" />
</Host>