SSH使用注解方式出异常 求教
一个简单的SSH(struts2.1 + hibernate3.3 + spring3.0)例子改为用注解配置后启动tomcat报错:
Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListenerorg.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userAction' defined in file [C:\Program Files\Apache Software Foundation\apache-tomcat-7.0.5\webapps\ssh5\WEB-INF\classes\com\lm\struts2\userAction.class]: Instantiation of bean failed;
nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.lm.struts2.userAction]: Constructor threw exception; nested exception is
java.lang.NullPointerExceptionat org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:946)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:892)
.............
Caused by:
org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.lm.struts2.userAction]: Constructor threw exception; nested exception is java.lang.
NullPointerExceptionat org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:141)
..................
Caused by: java.lang.NullPointerExceptionat org.apache.struts2.ServletActionContext.getRequest(ServletActionContext.java:112)
at com.lm.struts2.userAction.<init>(userAction.java:21)
意思好像是不能初始化UserAction
下面是配置文件
applicationContext.xml:
XML code
<?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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"
default-autowire="byName">
<context:annotation-config />
<context:component-scan base-package="com.lm"></context:component-scan>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName"
value="com.mysql.jdbc.Driver">
</property>
<property name="url" value="jdbc:mysql://127.0.0.1:3306"></property>
<property name="username" value="root"></property>
<property name="password" value="lm"></property>
<property name="maxActive" value="100"></property>
<property name="maxIdle" value="30"></property>