居然我也是同样的问题

2015-12-2 9:09:28 org.apache.catalina.core.AprLifecycleListener init
信息: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: E:\MyEclipse 8.5\Common\binary\com.sun.java.jdk.win32.x86_1.6.0.013\bin;D:\Tomcat 6.0\bin
2015-12-2 9:09:28 org.apache.coyote.http11.Http11Protocol init
信息: Initializing Coyote HTTP/1.1 on http-8080
2015-12-2 9:09:28 org.apache.catalina.startup.Catalina load
信息: Initialization processed in 443 ms
2015-12-2 9:09:28 org.apache.catalina.core.StandardService start
信息: Starting service Catalina
2015-12-2 9:09:28 org.apache.catalina.core.StandardEngine start
信息: Starting Servlet Engine: Apache Tomcat/6.0.18
log4j:WARN No appenders could be found for logger (com.opensymphony.xwork2.config.providers.XmlConfigurationProvider).
log4j:WARN Please initialize the log4j system properly.
2015-12-2 9:09:33 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info
信息: Parsing configuration file [struts-default.xml]
2015-12-2 9:09:33 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info
信息: Parsing configuration file [struts-plugin.xml]
2015-12-2 9:09:33 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info
信息: Parsing configuration file [struts.xml]
log4j:WARN No appenders could be found for logger (freemarker.cache).
log4j:WARN Please initialize the log4j system properly.
2015-12-2 9:09:37 org.apache.coyote.http11.Http11Protocol start
信息: Starting Coyote HTTP/1.1 on http-8080
2015-12-2 9:09:37 org.apache.jk.common.ChannelSocket init
信息: JK: ajp13 listening on /0.0.0.0:8009
2015-12-2 9:09:37 org.apache.jk.server.JkMain start
信息: Jk running ID=0 time=0/47  config=null
2015-12-2 9:09:37 org.apache.catalina.startup.Catalina start
信息: Server startup in 8641 ms

查询的时候控制台输出什么？你贴出来 我看下

2015-11-26 16:41:53 org.apache.catalina.core.AprLifecycleListener init
信息: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: E:\MyEclipse 8.5\Common\binary\com.sun.java.jdk.win32.x86_1.6.0.013\bin;D:\Tomcat 6.0\bin
2015-11-26 16:41:53 org.apache.coyote.http11.Http11Protocol init
信息: Initializing Coyote HTTP/1.1 on http-8080
2015-11-26 16:41:53 org.apache.catalina.startup.Catalina load
信息: Initialization processed in 663 ms
2015-11-26 16:41:53 org.apache.catalina.core.StandardService start
信息: Starting service Catalina
2015-11-26 16:41:53 org.apache.catalina.core.StandardEngine start
信息: Starting Servlet Engine: Apache Tomcat/6.0.18
log4j:WARN No appenders could be found for logger (com.opensymphony.xwork2.config.providers.XmlConfigurationProvider).
log4j:WARN Please initialize the log4j system properly.
2015-11-26 16:41:59 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info
信息: Parsing configuration file [struts-default.xml]
2015-11-26 16:41:59 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info
信息: Parsing configuration file [struts-plugin.xml]
2015-11-26 16:41:59 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info
信息: Parsing configuration file [struts.xml]
log4j:WARN No appenders could be found for logger (freemarker.cache).
log4j:WARN Please initialize the log4j system properly.
2015-11-26 16:42:05 org.apache.coyote.http11.Http11Protocol start
信息: Starting Coyote HTTP/1.1 on http-8080
2015-11-26 16:42:05 org.apache.jk.common.ChannelSocket init
信息: JK: ajp13 listening on /0.0.0.0:8009
2015-11-26 16:42:05 org.apache.jk.server.JkMain start
信息: Jk running ID=0 time=0/60  config=null
2015-11-26 16:42:05 org.apache.catalina.startup.Catalina start
信息: Server startup in 12044 ms
Hibernate:
    select
        users0_.uid as uid1_1_,
        users0_.username as username2_1_,
        users0_.password as password3_1_
    from
        hello_users users0_
    where
        users0_.username=?
        and users0_.password=?

有可能是你的查询界面的表单代码name属性值去javaBean中封装的值不一致，或者说你的查询方法的sql语句不正确，又或者数据库名字写错了吧。

也可以在持久层做一个输出输出  查询条件以及结果看控制台输出