一个HibernateDaoSupport的问题

这是我的spring配置文件<?xml version="1.0" encoding="UTF-8"?>
<beans default-autowire="byName"
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-2.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-2.0.xsd" default-lazy-init="true"> <bean id="conn" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"></property>
<property name="url" value="jdbc:oracle:thin:@localhost:1521:ora9"></property>
<property name="username" value="admin"></property>
<property name="password" value="admin123"></property>
<property name="initialSize" value="5" />
<property name="maxActive" value="100" />
<property name="maxIdle" value="30" />
<property name="maxWait" value="1000" />
<property name="poolPreparedStatements" value="true" />
<property name="defaultAutoCommit" value="false" />
</bean>

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource">
<ref bean="conn" />
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">
org.hibernate.dialect.Oracle10gDialect
</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.format_sql">false</prop>
</props>
</property>
<property name="mappingDirectoryLocations">
<list>
<value>classpath*:/com/rong/model/vo</value>
</list>
</property>
</bean>


<bean id="txManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
<tx:advice id="txAdvice" transaction-manager="txManager">
<tx:attributes>
<tx:method name="get*" propagation="SUPPORTS"
read-only="true" />
<tx:method name="find*" propagation="SUPPORTS"
read-only="true" />
<tx:method name="*" propagation="REQUIRED" />
</tx:attributes>
</tx:advice>
<aop:config>
<aop:pointcut id="bizMethods"
expression="execution(* com.rong.model.service.*.*.*(..))" />
<aop:advisor advice-ref="txAdvice" pointcut-ref="bizMethods" />
</aop:config>




 <bean name="/admin" class="com.rong.web.action.system.AdminAction"></bean>
<bean name="/receiptsSelectAction" class="com.rong.web.action.system.ReceiptsSelectActionAction"></bean>
<bean name="/pDAAdmin" class="com.rong.web.action.system.PDAAdminAction"></bean>


<bean id="XadeptDAO" class="com.rong.model.dao.XadeptDAO">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
</bean>
<bean id="pdamanagementDAO"
class="com.rong.model.dao.PdamanagementDAO">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
</bean>
<bean id="XaunitDAO" class="com.rong.model.dao.XaunitDAO">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
</bean>

成功了
信息: Initializing WebApplicationContext for Struts ActionServlet 'action', module ''
2010-1-12 20:32:51 org.apache.coyote.http11.Http11Protocol start
信息: Starting Coyote HTTP/1.1 on http-8088
2010-1-12 20:32:51 org.apache.jk.common.ChannelSocket init
信息: JK: ajp13 listening on /0.0.0.0:8009
2010-1-12 20:32:51 org.apache.jk.server.JkMain start
信息: Jk running ID=0 time=0/47 config=null
2010-1-12 20:32:51 org.apache.catalina.startup.Catalina start
信息: Server startup in 7642 ms
用户登陆。。
dddddddddddddddddddddddd
dopdaadd...
java.lang.NullPointerException
at com.rong.model.dao.BaseDaoImpl.save(BaseDaoImpl.java:78)
at com.rong.model.service.ServiceImp.save(ServiceImp.java:55)
at com.rong.web.action.system.PDAAdminAction.dopdaadd(PDAAdminAction.java:71)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270)
at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.rong.util.ChineseFilter.doFilter(ChineseFilter.java:40)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)这是异常

感觉你报错没到HibernateDaoSupport。空指针自己解决吧。能力的提高就是不断的改错！

default-autowire="byName"
去了呢

你的Service层配置了没有啊？把DAO注入到Service里边么？正在用你说的方式开发，你多贴些可能出现错误的地方，我给你看下，我在线。

我先介绍下我的调用过程,我是在action中调用一个service,service中调用DAO,这个DAO继承HibernateDaoSupport,spring配置文件已经注入了，
<bean id="baseDao" class="com.rong.dao.BaseDaoImpl">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
</bean>

把你Service的代码贴出来，或者你就是直接用Action层调用Dao层的
那么请把Dao注入Action

既然是service中调用DAO那么在spring的配置文件里，你要把DAO注入service

这是service在spring中配置<bean id="iservice" class="com.rong.service.ServiceImp"></bean>
在service中调用是这样写的：IBaseDao baseDao = null;再加上set,get方法

            <tx:method name="get*" propagation="SUPPORTS"
                read-only="true" />
            <tx:method name="find*" propagation="SUPPORTS"
                read-only="true" />
            <tx:method name="*" propagation="REQUIRED" />
你是不是没根据你的命名规范命名方法名称？？？

我把代码贴详细些，<bean id="userDao" class="com.accp.house.dao.impl.UserDaoImpl">
    <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>

<bean id="userService" class="com.accp.house.service.impl.UserServiceImpl">
    <property name="userDao" ref="userDao"></property>
    </bean>

<bean name="/logine" class="com.accp.house.web.struts.action.LogineAction">
    <property name="userService" ref="userService"></property>
    </bean>[/code]

命名是规范的,我service中的方法就叫save(),dao中也是叫save()

<bean id="basicDao"
class="org.springframework.orm.hibernate3.support.HibernateDaoSupport"
abstract="true">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
</bean><bean id="XadeptDAO" class="com.rong.model.dao.XadeptDAO" parent="basicDao">
</bean>其余的DAO对着改下
还有我的资源有个SSH整合视频下了看看

错误找到了,是service注入错了,如果是接口在spring中应该怎么配置啊?
比如我在action中声明IBaseDAO baseDAO;加上set,get方法，在spring中怎样配置，class=是写接口还是写实现类？

像public class GenericHibernateDAO<T extends Serializable, PK extends Serializable> extends HibernateDaoSupport implements GenericDAO<T, PK>这个类中有两个参数T和PK在spring中应该怎样配置，怎样把参数加进去？

你这个不就是属性注入吗？
你这个T PK 怎么都继承Serializable呀。
支持属性注入应该也<T> 没关系吧它只是强调一种依赖关系（这种写法没试过。。）

public class GenericHibernateDAO <T extends Serializable, PK extends Serializable> extends HibernateDaoSupport implements GenericDAO <T, PK>这个类中有两个参数T和PK在spring中应该怎样注入啊?

package com.ts.spring;import java.io.Serializable;public class MySpring <T extends Serializable,PK extends Serializable> {
     public void test(){
     System.out.println("我拿到测试数据了");
     }
}
package com.ts.spring;public class MySpring2 {
private MySpring myspring=null; public void setMyspring(MySpring myspring) {
this.myspring = myspring;
}
    public void test(){
     myspring.test();
    }
public MySpring getMyspring() {
return myspring;
}
}
<?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="mySpring" class="com.ts.spring.MySpring"></bean>    <bean id="mySpring2" class="com.ts.spring.MySpring2">
    <property name="myspring" ref="mySpring"></property>
    </bean>
</beans>package com.ts.test;import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;import com.ts.spring.MySpring2;public class MyTest { /**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
ApplicationContext context =
      new ClassPathXmlApplicationContext("applicationContext.xml");
MySpring2 springTest=(MySpring2)context.getBean("mySpring2");
springTest.test();
}}
//输出我拿到测试数据了

说明MySpring后面的<T extends Serializable,PK extends Serializable>
与属性方式注入无关。属性方式注入：注入只与属性有关。只要你确定依赖关系就可以获得其实例
Over！！！

应该是你注入的时候出错了没找到对应的名字,byName是按名字查找的你可以看一下你的名字会不会对的上,本身默认的是按byType查找的不知道你为啥要改成byName

调试易

一个HibernateDaoSupport的问题

解决方案 »