Java中session的过时时间配置，session过时的优先级
1. 在web容器中设置（此处以tomcat为例）
在tomcat-5.0.28\conf\web.xml中设置，以下是tomcat 5.0中的默认配置：
[html]
<!-- ==================== Default Session Configuration ================= -->
<!-- You can set the default session timeout (in minutes) for all newly -->
<!-- created sessions by modifying the value below. -->
<session-config>
<session-timeout>30</session-timeout>
</session-config>
[html]
<!-- ==================== Default Session Configuration ================= -->
<!-- You can set the default session timeout (in minutes) for all newly -->
<!-- created sessions by modifying the value below. -->
<session-config>
<session-timeout>30</session-timeout>
</session-config>
<!-- ==================== Default Session Configuration ================= -->
<!-- You can set the default session timeout (in minutes) for all newly -->
<!-- created sessions by modifying the value below. -->
<session-config>
<session-timeout>30</session-timeout>
</session-config>Tomcat默认session超时时间为30分钟，可以根据需要修改，负数或0为不限制session失效时间。
2. 在工程的web.xml中设置
[html]
<!-- 时间单位为分钟 -->
[html] view plaincopyprint?
<!-- 时间单位为分钟 -->
<!-- 时间单位为分钟 -->
<session-config>
<session-timeout>15</session-timeout>
</session-config>
3. 通过java代码设置
session.setMaxInactiveInterval（30*60）;//以秒为单位
三种方式优先级：1 < 2 <3
补充：软件开发 , Java ,
