java解决框架注入,SSH框架 使用Spring时 IOC无法注入解决办法

SSH框架 使用Spring时 IOC无法注入

本人初学JavaWeb 现在在自己做一个SSH的练习

今天遇到一个 Spring无法注入的问题， 用了一个下午的时间也没找到毛病具体发生在哪儿

求经验丰富的大神给看看 指点一下 谢了。

下面是配置文件以及代码

web.xml

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

index.jsp

org.springframework.web.context.ContextLoaderListener

contextConfigLocation

classpath:beans.xml

struts2

org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter

struts2

/*

-----------------------------------------

beans.xml(Spring的bean容器)

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns:context="http://www.springframework.org/schema/context"

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-2.5.xsd

http://www.springframework.org/schema/context

http://www.springframework.org/schema/context/spring-context-2.5.xsd

http://www.springframework.org/schema/aop

http://www.springframework.org/schema/aop/spring-aop-2.5.xsd

http://www.springframework.org/schema/tx

http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">

classpath:jdbc.properties

class="org.apache.commons.dbcp.BasicDataSource">

value="${jdbc.driverClassName}" />

class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">

com.leo.pointmanage.model

org.hibernate.dialect.MySQLDialect

true

class="org.springframework.orm.hibernate3.HibernateTransactionManager">

expression="execution(public * com.bjsxt.registration.service.*.*(..))" />

advice-ref="txAdvice" />

---------------------------------------------------

Java代码

package com.leo.pointmanage.dao.impl;

import java.util.ArrayList;

import java.util.List;

import javax.annotation.Resource;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.springframework.orm.hibernate3.HibernateTemplate;

import org.springframework.stereotype.Component;

import com.leo.pointmanage.dao.PointParticipantDao;

import com.leo.pointmanage.dto.PointParticipant;

import com.leo.pointmanage.model.Participant;

@Component("pointParticipantDao")

public class PointParticipantDaoImpl implements PointParticipantDao {

private List listPointParticipant = new ArrayList();

private HibernateTemplate hibernateTemplate = new HibernateTemplate();

private Participant participant = new Participant();

private SessionFactory sessionFactory ;

public Participant LoadById (int participantId){

System.out.println("start");

participant.setParticipantName("test");

participant.setPartcipantId(participantId);

participant.setAdministratorFlag(1);

return participant;

}

public List LoadPointParticipant(int participantId) {

String queryString = ""+

"SELECT "+

"pa.participantId, "+

"    pa.participantName, "+

"    th.themeName, "+

"    ca.campaignName, "+

"    (po.point_gathering + po.point_dismission + po.point_performance + po.point_leader + po.point_assart) as point_sum, "+

"    po.point_gathering, "+

"    po.point_dismission, "+

"    po.point_performance, "+

"    po.point_leader, "+

"    po.point_assart "+

" FROM "+

" Participant pa "+

"    LEFT JOIN "+

" Point po ON po.participantId = pa.participantId "+

"     LEFT JOIN "+

" Campaign ca ON ca.campaignId = po.campaignId "+

"     LEFT JOIN "+

" Theme th ON th.themeId = ca.themeId"+

" Where pa.participantId = " + participantId;

System.out.println("-----------------here-------------------");

System.out.println(sessionFactory.toString());

System.out.println(queryString);

Session ss = sessionFactory.openSession();

ss.beginTransaction();

ss.save(participant);

ss.getTransaction().commit();

ss.close();

return null;

//listPointParticipant = (List)hibernateTemplate.find(queryString);

//return listPointParticipant;

}

public List getListPointParticipant() {

return listPointParticipant;

}

public void setListPointParticipant(

List listPointParticipant) {

this.listPointParticipant = listPointParticipant;

}

public HibernateTemplate getHibernateTemplate() {

return hibernateTemplate;

}

@Resource

public void setHibernateTemplate(HibernateTemplate hibernateTemplate) {

this.hibernateTemplate = hibernateTemplate;

}

public Participant getParticipant() {

return participant;

}

public void setParticipant(Participant participant) {

this.participant = participant;

}

public SessionFactory getSessionFactory() {

return sessionFactory;

}

@Resource

public void setSessionFactory(SessionFactory sessionFactory) {

this.sessionFactory = sessionFactory;

}

}

问题具体描述

由于 @Resource 下面的 setSessionFactory 无法给我注入 写在beans.xml中的 sessionFactory

所以 在使用 LoadPointParticipant 这个方法时

走到 System.out.println(sessionFactory.toString()); 这一步便会报错 提示错误为 空指针异常 java.lang.NullPointerException

------解决思路----------------------

@Resource

private SessionFactory sessionFactory ;

------解决思路----------------------

楼主 看一下你的启动日志

sessionFactory

是否正常初始化!

------解决思路----------------------

感觉注入的配置有点不对，

个人感觉，同样是新手

------解决思路----------------------

class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">