ssh-test12-06版本，异常解决过程
[org.springframework.web.context.ContextLoader]Context initialization failed
把web.xml中的hibernate.cfg.xml删掉解决了
[org.springframework.web.context.support.XmlWebApplicationContext]Exception encountered during context initialization - cancelling refresh attempt
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [spring.xml]: Invocation of init method failed; nested exception is java.lang.IncompatibleClassChangeError: class net.sf.cglib.core.DebuggingClassWriter has interface org.objectweb.asm.ClassVisitor as super class
检查了jar包，发现asm包有两个，修改pom.xml文件，删掉了一个asm包并没有解决问题。
将cglib的版本改为2.2解决了这个问题
，
该版本中的DebuggingClassWriter的父类为ClassWriter
又出现了
[org.hibernate.impl.SessionFactoryImpl]Unable to construct current session context [org.springframework.orm.hibernate4.SpringSessionContext]
java.lang.NoSuchMethodException
: org.springframework.orm.hibernate4.SpringSessionContext.<init>(org.hibernate.engine.SessionFactoryImplementor)
解决不了，改数据源配置
github上找了一个ssh的demo，使用的是Druid，其版本配置为spring4.2+hibernate5
https://github.com/liyifeng1994/ssm ssm demo，全过程
aop配置问题
配置事务时,一定注意expression="execution(* com.crm..*(..))" 应该为
expression="execution(* com.crm.*.*(..))" ,这样，切点才定位到方法上了。
java.lang.UnsupportedOperationException
: Not supported by BasicDataSource
异常处理：
<
bean
id
=
"dataSource"
class
=
"org.apache.commons.dbcp.BasicDataSource"
>改为
<
bean
id
=
"dataSource"
class
=
"
org.springframework.jdbc.datasource.DriverManagerDataSource
"
>
问题背景：
工程为maven工程，ContextLoaderListener类位于spring-web-3.1.0.RELEASE.jar包中。检查了maven的pom.xml，依赖引入正常。在工程Maven Dependencies视图中也能看到spring-web-3.1.0.RELEASE.jar包被正常引入进来了。
错误原因：
进入到tomcat的部署路径.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\下检查了一下，发现工程部署后在WEB-INF文件夹下没有生成lib目录，正常情况下，会生成lib目录并把工程的所有依赖jar包都部署到该目录下。
解决方案：
1.右键点击项目--选择Properties
选择Deployment Assembly,在右边点击Add按钮，在弹出的窗口中选择Java Build Path Entries
2.点击Next，选择Maven Dependencies
3.点击Finish，然后可以看到已经把Maven Dependencies添加到Web应用结构中了。
操作完后，重新部署工程，不再报错了。然后我们再到 .metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\ 目录下，发现工程WEB-INF目录下自动生成了lib目录，并且所有的依赖jar包也都已经部署进来。问题因此解决。
找不到jdbc.properties中的变量的错误：{jdbc_driverClassName}不起作用，的解决方案
在spring-hibernate.xml文件中加入
<
context:property-placeholder
location
=
"classpath*:config.properties"
/>
找不到spring.xml的处理
classpath:spring.xml -> classpath*:spring.xml
页面跳转问题的处理
暂未处理完毕
A child container failed during start java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/demo]]
解决方法：
解决这个问题的关键在于错误信息中的：
打开项目下的“src\main\webapp\WEB-INF\web.xml”文件，查找类似下面的节点：
将这个节点删除，问题就解决了。
spring默认加载的配置文件名demo-servlet.xml
<servlet>
<servlet-name>demo</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>demo</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
org.springframework.beans.factory.BeanCreationException
: Error creating bean with name 'userinfoController': Injection of autowired dependencies failed; nested exception is
org.springframework.beans.factory.BeanCreationException
: Could not autowire field: private com.demo.service.IUserinfoService com.demo.controller.UserinfoController.userinfoServiceImpl; nested exception is
org.springframework.beans.factory.NoSuchBeanDefinitionException
: No qualifying bean of type [com.demo.service.IUserinfoService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true), @org.springframework.beans.factory.annotation.Qualifier(value=userinfoServiceImpl)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(
AutowiredAnnotationBeanPostProcessor.java:334
)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(
AbstractAutowireCapableBeanFactory.java:1214
)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(
AbstractAutowireCapableBeanFactory.java:543
)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(
AbstractAutowireCapableBeanFactory.java:482
)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(
AbstractBeanFactory.java:306
)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(
DefaultSingletonBeanRegistry.java:230
)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(
AbstractBeanFactory.java:302
)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(
AbstractBeanFactory.java:197
)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(
DefaultListableBeanFactory.java:772
)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(
AbstractApplicationContext.java:839
)
at org.springframework.context.support.AbstractApplicationContext.refresh(
AbstractApplicationContext.java:538
)
at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(
FrameworkServlet.java:668
)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(
FrameworkServlet.java:634
)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(
FrameworkServlet.java:682
)
at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(
FrameworkServlet.java:553
)
at org.springframework.web.servlet.FrameworkServlet.initServletBean(
FrameworkServlet.java:494
)
at org.springframework.web.servlet.HttpServletBean.init(
HttpServletBean.java:136
)
at javax.servlet.GenericServlet.init(
GenericServlet.java:158
)
at org.apache.catalina.core.StandardWrapper.initServlet(
StandardWrapper.java:1227
)
at org.apache.catalina.core.StandardWrapper.loadServlet(
StandardWrapper.java:1140
)
at org.apache.catalina.core.StandardWrapper.load(
StandardWrapper.java:1027
)
at org.apache.catalina.core.StandardContext.loadOnStartup(
StandardContext.java:5038
)
at org.apache.catalina.core.StandardContext.startInternal(
StandardContext.java:5348
)
at org.apache.catalina.util.LifecycleBase.start(
LifecycleBase.java:145
)
at org.apache.catalina.core.ContainerBase$StartChild.call(
ContainerBase.java:1408
)
at org.apache.catalina.core.ContainerBase$StartChild.call(
ContainerBase.java:1398
)
at java.util.concurrent.FutureTask.run(
FutureTask.java:262
)
at java.util.concurrent.ThreadPoolExecutor.runWorker(
ThreadPoolExecutor.java:1145
)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(
ThreadPoolExecutor.java:615
)
at java.lang.Thread.run(
Thread.java:745
)
Caused by:
org.springframework.beans.factory.BeanCreationException
: Could not autowire field: private com.demo.service.IUserinfoService com.demo.controller.UserinfoController.userinfoServiceImpl; nested exception is
org.springframework.beans.factory.NoSuchBeanDefinitionException
: No qualifying bean of type [com.demo.service.IUserinfoService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true), @org.springframework.beans.factory.annotation.Qualifier(value=userinfoServiceImpl)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(
AutowiredAnnotationBeanPostProcessor.java:573
)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(
InjectionMetadata.java:88
)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(
AutowiredAnnotationBeanPostProcessor.java:331
)
... 29 more
Caused by:
org.springframework.beans.factory.NoSuchBeanDefinitionException
: No qualifying bean of type [com.demo.service.IUserinfoService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true), @org.springframework.beans.factory.annotation.Qualifier(value=userinfoServiceImpl)}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(
DefaultListableBeanFactory.java:1373
)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(
DefaultListableBeanFactory.java:1119
)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(
DefaultListableBeanFactory.java:1014
)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(
AutowiredAnnotationBeanPostProcessor.java:545
)
... 31 more
这个异常主要是因为注入bean的顺序导致，在spring-servlet配置文件中，应该按dao->service->controller的顺序扫描各个包。
正确的spring-servlet扫描包的过程：
<!-- 注解扫描包 -->
<context:component-scan base-package="com.demo.dao.impl" />
<context:component-scan base-package="com.demo.services.impl" />
<context:component-scan base-package="com.demo.controllers" />
原因：controller里面的方法依赖了service，而service又依赖了dao
错误的配置
<
context:component-scan
base-package
=
"com.demo.controllers"
/>
<!-- 自动扫描
dao
和service包(自动注入) -->
<
context:component-scan
base-package
=
"com.demo.services.impl"
/>
<
context:component-scan
base-package
=
"com.demo.dao.impl"
/>