SSH应用中遇见的琐碎问题，灰常郁闷中……

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SSH应用中遇见的琐碎问题，灰常郁闷中……3

是这样一个流程：
index.jsp以管理员身份登陆——→根据登陆名从数据库查询所有模糊匹配的用户得到list——→在list中遍历每个Admins，如果有loginname和password完全匹配者，则获取这个Admins的id——→从数据库的admins用获得的id取出这个Admins并存入session——→跳转页面至adm_main.jsp——→adm_main.jsp是一个框架页面，利用Struts的Tiles分帧——→根据分帧信息加载header.jsp,footer.jsp等。

SSH框架基本搭建好了，貌似没有大错误，不过有两个问题点不太明白：

★问题A：
    这是struts-config.xml文件的片段：
<struts-config>
<data-sources />
<form-beans />
<global-exceptions />
<global-forwards />
<action-mappings >
    <action path="/addAdmin" type="edu.bhu.Kupid.actions.AddAdmin" validate="false" >
    <forward name="ok" path="/ok.jsp" ></forward>
    </action>
    <action path="/loginCheckAction" type="edu.bhu.Kupid.actions.LoginCheckAction" validate="false" >
    <forward name="adm_main" path="adm_main"></forward>
    </action>
</action-mappings>


<controller processorClass="org.springframework.web.struts.DelegatingRequestProcessor" />
<plug-in className="org.apache.struts.tiles.TilesPlugin" >

      
      <set-property property="definitions-config"
                       value="/WEB-INF/tiles-config.xml" />
    </plug-in>

</struts-config>

出现的问题：浏览器报404错误，好像在说找不到ServletAction，如果将Tiles的插件节点删除，即
<plug-in className="org.apache.struts.tiles.TilesPlugin" >

      
      <set-property property="definitions-config"
                       value="/WEB-INF/tiles-config.xml" />
    </plug-in>
这部分删掉，则一切正常。
Why?
该如何处理？

★问题B：
这是一个BaseDaoImpl. java的代码：
package edu.bhu.Kupid.persist;

import java.io.Serializable;

import org.springframework.orm.hibernate3.HibernateTemplate;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

public class BaseDaoImpl<T,PK extends Serializable> extends HibernateDaoSupport implements BaseDao<T, PK> {

protected Class entityClass;
protected HibernateTemplate ht;
public HibernateTemplate getHt() {
return ht;
}

public void setHt(HibernateTemplate ht) {
this.ht = ht;
}

public void delete(T entity) {
getHibernateTemplate().delete(entity);
}

public void deleteById(PK id) {
getHibernateTemplate().delete(getHibernateTemplate().get(entityClass, id));
}

public T findById(PK id) {
return (T)getHibernateTemplate().get(entityClass, id);
}

public void insert(T entity) {

getHibernateTemplate().save(entity);

}

public void update(T entity) {
getHibernateTemplate().update(entity);
}

}

出现的问题：
如果有一个AdminsDaoImpl类作为其子类：
public class AdminsDaoImpl extends BaseDaoImpl<Admins,String> implements AdminsDao
则该子类应该继承了他的方法。
但是在一个Action中我写了private AdminsServiceImpl asi;并提供set/get方法将其注入，然后调用asi.findById(id)的时候出现了一个空指针异常。
后来在AdminsDaoImpl中重写父类方法findById：
public Admins findById(final String id) {
List<Admins> list= (List<Admins>)ht.execute(new HibernateCallback() {
public Object doInHibernate(Session s) throws HibernateException,
SQLException {
Criteria c = s.createCriteria(Admins.class);
c.add(Restrictions.eq("id",id));
return c.list();
}
});
Admins a=new Admins();
for(int i=0;i<list.size();i++)
{
a.setId(list.get(i).getId());
a.setLevel(list.get(i).getLevel());
a.setPwd(list.get(i).getPwd());
a.setLoginname(list.get(i).getLoginname());
}
return a;
}
则一切正常。
那么，问题又在哪？为什么重写了再调用就没有异常？直接调父类方法就有空指针问题？父类和子类的HibernateTemplate我都做了注入。

==================================================================================================

以下为相关的配置文件：
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.5" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee   http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

<servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
    <init-param>
      <param-name>config</param-name>
      <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
    <init-param>
      <param-name>debug</param-name>
      <param-value>3</param-value>
    </init-param>
    <init-param>
      <param-name>detail</param-name>
      <param-value>3</param-value>
    </init-param>
    <load-on-startup>0</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>action</servlet-name>
    <url-pattern>*.do</url-pattern>
</servlet-mapping>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<servlet>
<servlet-name>SpringContextServlet</servlet-name>
<servlet-class>
org.springframework.web.context.ContextLoaderServlet
</servlet-class>
<load-on-startup>0</load-on-startup>
</servlet>
<filter>
<filter-name>OpenSessionInView</filter-name>
<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
<init-param>
<param-name>singleSession</param-name>
<param-value>false</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>OpenSessionInView</filter-name>
<url-pattern>*.do</url-pattern>
</filter-mapping>
<welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>

struts-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">

<struts-config>
<data-sources />
<form-beans />
<global-exceptions />
<global-forwards />
<action-mappings >
    <action path="/addAdmin" type="edu.bhu.Kupid.actions.AddAdmin" validate="false" >
    <forward name="ok" path="/ok.jsp" ></forward>
    </action>
    <action path="/loginCheckAction" type="edu.bhu.Kupid.actions.LoginCheckAction" validate="false" >
    <forward name="adm_main" path="adm_main"></forward>
    </action>
</action-mappings>


<controller processorClass="org.springframework.web.struts.DelegatingRequestProcessor" />
<plug-in className="org.apache.struts.tiles.TilesPlugin" >

      
      <set-property property="definitions-config"
                       value="/WEB-INF/tiles-config.xml" />
    </plug-in>

</struts-config>

tiles-config.xml
<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE tiles-definitions PUBLIC
       "-//Apache Software Foundation//DTD Tiles Configuration 1.3//EN"
       "http://struts.apache.org/dtds/tiles-config_1_3.dtd">
<tiles-definitions>
<definition name="adm_main" path="/adm_main.jsp">
        <put name="adm_header" value="/adm_header.jsp"></put>
        <put name="adm_welcome" value="/adm_welcome.jsp"></put>
        <put name="adm_footer" value="/adm_footer.jsp"></put>
</definition>
</tiles-definitions>

applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
    <import resource="spring-admins.xml" />
<import resource="spring-login.xml" />
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location">
<value>classpath:configure.properties</value>
</property>
</bean>
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource">
<ref bean="dataSource"/>
</property>
</bean>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName">
<value>${jdbc.driverClassName}</value>
</property>
<property name="url">
<value>${jdbc.url}</value>
</property>
<property name="username">
<value>${jdbc.username}</value>
</property>
<property name="password">
<value>${jdbc.password}</value>
</property>
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource">
<ref bean="dataSource" />
</property>
<property name="mappingResources">
<list>
<value>/edu/bhu/Kupid/domain/Admins.hbm.xml
</value>

</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">
${hibernate.dialect}
</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.format_sql">true</prop>
</props>
</property>
</bean>
<bean id="baseDao" class="edu.bhu.Kupid.persist.BaseDaoImpl" abstract="true">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
<property name="ht">
<ref bean="hibernateTemplate" />
</property>
</bean>

<bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
</bean>
</beans>

spring-admins.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
<bean id="adminsDao" class="edu.bhu.Kupid.persist.AdminsDaoImpl" parent="baseDao">
<property name="ht">
<ref bean="hibernateTemplate" />
</property>
</bean>
<bean id="adminsServer" class="edu.bhu.Kupid.service.AdminsServiceImpl">
<property name="admDao">
<ref bean="adminsDao"/>
</property>
</bean>
<bean name="/addAdmin" class="edu.bhu.Kupid.actions.AddAdmin">
<property name="admServer">
<ref bean="adminsServer" />
</property>
</bean>
</beans>

spring-login.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
<import resource="spring-admins.xml" />
<bean name="/loginCheckAction" class="edu.bhu.Kupid.actions.LoginCheckAction" >
<property name="asi">
<ref bean="adminsServer" />
</property>
</bean>

</beans>

如果您不喜欢看这样长篇的代码，我还将项目进行了打包上传，为了削减附件的大小，MyGraduation\WebRoot\WEB-INF\lib\下的全部SSH的jar包被删除。

感谢回答问题的人，万福。

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