使用spring+struts2无法注入bean对象,求救！

[cap_jack_sp]

配置web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
	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">
	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>

	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>

	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:application.xml</param-value>
	</context-param>

	<filter>
		<filter-name>struts2</filter-name>
		<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
	</filter>

	<filter-mapping>
		<filter-name>struts2</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
</web-app>

application.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" 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">
	<import resource="com/common/commonContext.xml"/>
       <bean id="optLoggerBean" 
	 	class="com.common.OptLoggerBean">
	 </bean>
	 <bean id="exceptionLogger" 
	 	class="com.common.ExceptionLogger">
	 </bean>
	 <aop:config>
		<aop:pointcut id="actionPoint" 
			expression="within(com.*.action..*)"/>
		<aop:aspect id="optLoggerAspect" 
			ref="optLoggerBean">
			<aop:around pointcut-ref="actionPoint"
				method="logger"/>
		</aop:aspect>
		
		<aop:aspect id="exceptionAspect" 
				ref="exceptionLogger">
			<aop:after-throwing 
				pointcut-ref="actionPoint"
				method="logger"
				throwing="e"/>
		</aop:aspect>
	</aop:config>
	<bean id="stuDao" class="com.huangcf.dao.impl.StudentDaoImpl">
		<property name="dataSource" ref="dataSource" />
	</bean>	
	<bean id="ser" class="com.huangcf.service.impl.StudentServiceImpl">
		<property name="dao" ref="stuDao"></property>
		<property name="transactionTemplate" ref="transactionTemplate" />
	</bean>

	<bean id="studentAction" class="com.huangcf.action.StudentAction"
		scope="prototype">
		<property name="ser" ref="ser"></property>
		<property name="username">  
            <value type="java.lang.String">admin</value>  
        </property>
		<property name="password">  
            <value type="java.lang.String">admin</value>  
        </property>  
	</bean>
</beans>

commonContext.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-2.5.xsd"> 
	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
              <property name="driverClassName">
                     <value>oracle.jdbc.driver.OracleDriver</value>
              </property>
              <property name="url">
                     <value>jdbc:oracle:thin:@localhost:1521:ORCL</value>
              </property>
              <property name="username">
                     <value>system</value>
              </property>
              <property name="password">
                     <value>Aa123456</value>
              </property>
              <property name="maxActive">
                     <value>255</value>
              </property>
              <property name="maxIdle">
                     <value>2</value>
              </property>
              <property name="maxWait">
                     <value>120000</value>
              </property>
       </bean>
       
    <bean id="template" class="org.springframework.jdbc.core.JdbcTemplate">
		<property name="dataSource" ref="dataSource" />
	</bean>

	<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource" />
	</bean>
	
	<bean id="transactionTemplate" class="org.springframework.transaction.support.TransactionTemplate">
		<property name="transactionManager" ref="transactionManager" />
	</bean>    
	<!--
	<bean id="jdbctTxManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">  
    	<property name="dataSource" ref="dataSource" >
    	</property>  
	</bean>
	<bean
		id="JdbcBasicTxProxy" abstract="true"
		class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
		<description>数据库事务代理</description>
		<property name="transactionManager" ref="jdbctTxManager"/>
		<property name="transactionAttributes">
			<props>
				<prop key="*">PROPAGATION_REQUIRED,readOnly</prop>
			</props>
		</property>
	</bean>
	<bean
		id="BasicJdbcDAO" abstract="true"
		class="org.springframework.jdbc.core.support.JdbcDaoSupport">
		<description>JdbcDAO</description>
		<property name="dataSource" ref="dataSource"/>
	</bean>	--> 
</beans>

action代码：

package com.huangcf.action;

import com.common.BaseAction;
import com.huangcf.entity.Student;
import com.huangcf.service.StudentService;

public class StudentAction extends BaseAction {

	public String username;
	public String password;
	private StudentService ser;

	@Override
	public String execute(){
		try{
			Student student = new Student();
			student.setUsername(username);
			student.setPassword(password);
			ser.login(student);
		}catch(Exception e){
			e.printStackTrace();
			logger.error(e);
		}
		return SUCCESS;
	}

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getPassword() {
		return password;
}
	public void setPassword(String password) {
		this.password = password;
	}

	public StudentService getSer() {
		return ser;
	}

	public void setSer(StudentService ser) {
		this.ser = ser;
	}
}

service代码：

package com.huangcf.service.impl;

import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.support.TransactionCallback;
import org.springframework.transaction.support.TransactionTemplate;

import com.huangcf.dao.StudentDao;
import com.huangcf.entity.Student;
import com.huangcf.service.StudentService;

public class StudentServiceImpl implements StudentService {
	
	private StudentDao dao;
	private TransactionTemplate transactionTemplate;
	
	public boolean login(final Student stu) {
		transactionTemplate.execute(new TransactionCallback() {
			@Override
			public Object doInTransaction(TransactionStatus arg0) {
				boolean b = dao.login(stu);
				System.out.println(b);
				return b;
				//throw new RuntimeException("抛出异常，在transactionTemplate中回调的事务将会回滚");
			}
		});
		return false;
	}

	public StudentDao getDao() {
		return dao;
	}

	public void setDao(StudentDao dao) {
		this.dao = dao;
	}

	public TransactionTemplate getTransactionTemplate() {
		return transactionTemplate;
	}

	public void setTransactionTemplate(TransactionTemplate transactionTemplate) {
		this.transactionTemplate = transactionTemplate;
	}
}

dao代码：

package com.huangcf.dao.impl;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.List;

import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;

import com.common.BaseDAO;
import com.huangcf.dao.StudentDao;
import com.huangcf.entity.Student;

public class StudentDaoImpl extends BaseDAO implements StudentDao {
	public boolean login(Student stu) {
		String sql = "select login_name username,password password from  tb_user where login_name = 'admin' and password = 'admin'";
		Student item = queryForObject(sql, Student.class);
		if(item == null){
			return false;
		}
		return true;
	}
}

调用action时报空指针，说service为空username、password也是null，原因在哪？

[执笔记忆的空白]

引用 2 楼 qq_27994141 的回复:

StudentAction里面的username,password 的修饰词是不是换成private？ 我也不太知道。。。

恩，可以换成private 试试

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[Defonds]

项目启动的时候有没有报异常？

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[qq_27994141]

StudentAction里面的username,password 的修饰词是不是换成private？ 我也不太知道。。。

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