我在apache Tomcat日志中收到此错误：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataBaseInitializer' defined in class path resource [context.xml]: Invocation of init method failed; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1512)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:521)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:296)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:293)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:628)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)
10-Oct-2015 00:41:01.266 SEVERE [RMI TCP Connection(3)-127.0.0.1] org.apache.catalina.core.StandardContext.startInternal One or more listeners failed to start. Full details will be found in the appropriate container log file
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:410)
10-Oct-2015 00:41:01.267 SEVERE [RMI TCP Connection(3)-127.0.0.1] org.apache.catalina.core.StandardContext.startInternal Context [] startup failed due to previous errors
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4729)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5167)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:725)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:701)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)
at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1648)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:791)
at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:463)
at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:413)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:791)
at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1447)
at javax.management.remote.rmi.RMIConnectionImpl.access$200(RMIConnectionImpl.java:89)
at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1292)
at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1380)
at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:812)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:322)
at sun.rmi.transport.Transport$1.run(Transport.java:177)
at sun.rmi.transport.Transport$1.run(Transport.java:174)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:173)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:553)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:808)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:667)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.NullPointerException
at net.dontdrinkandroot.example.angularrestspringsecurity.dao.JpaDao.save(JpaDao.java:69)
at net.dontdrinkandroot.example.angularrestspringsecurity.dao.DataBaseInitializer.initDataBase(DataBaseInitializer.java:46)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeCustomInitMethod(AbstractAutowireCapableBeanFactory.java:1638)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1579)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1509)
... 55 more
10-Oct-2015 00:41:01.370 WARNING [RMI TCP Connection(3)-127.0.0.1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesJdbc The web application [ROOT] registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
[2015-10-10 12:41:01,617] Artifact angular-rest-springsecurity:war exploded: Error during artifact deployment. See server log for details.
[2015-10-10 12:42:14,717] Artifact angular-rest-springsecurity:war exploded: Artifact is being deployed, please wait...
10-Oct-2015 00:42:43.433 INFO [Finalizer] org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading Illegal access: this web application instance has been stopped already. Could not load [com.mysql.jdbc.SQLError]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load [com.mysql.jdbc.SQLError]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1335)
at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1321)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1203)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1164)
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3246)
at com.mysql.jdbc.MysqlIO.quit(MysqlIO.java:1656)
at com.mysql.jdbc.ConnectionImpl.realClose(ConnectionImpl.java:4261)
at com.mysql.jdbc.ConnectionImpl.cleanup(ConnectionImpl.java:1248)
at com.mysql.jdbc.ConnectionImpl.finalize(ConnectionImpl.java:2655)
at java.lang.ref.Finalizer.invokeFinalizeMethod(Native Method)
at java.lang.ref.Finalizer.runFinalizer(Finalizer.java:101)
at java.lang.ref.Finalizer.access$100(Finalizer.java:32)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:178)
我的web.xml文件是：
**<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">
<display-name>angular-rest-springsecurity</display-name>
<!--
Load Spring Context
-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
classpath:/context.xml
</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--
Map the REST Servlet to /rest/
-->
<servlet>
<servlet-name>RestService</servlet-name>
<servlet-class>com.sun.jersey.spi.spring.container.servlet.SpringServlet</servlet-class>
<init-param>
<param-name>com.sun.jersey.config.property.packages</param-name>
<param-value>net.dontdrinkandroot.example.angularrestspringsecurity.rest</param-value>
</init-param>
<init-param>
<param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name>
<param-value>true</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>RestService</servlet-name>
<url-pattern>/rest/*</url-pattern>
</servlet-mapping>
<!--
Apply Spring Security Filter to all Requests
-->
<filter>
<filter-name>springSecurityFilterChain</filter-name>
<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>
<filter-mapping>
<filter-name>springSecurityFilterChain</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>**
的persistence.xml：
<?xml version="1.0" encoding="UTF-8"?>
<persistence
version="1.0"
xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
<persistence-unit name="examplePU">
<class>net.dontdrinkandroot.example.angularrestspringsecurity.entity.NewsEntry</class>
<class>net.dontdrinkandroot.example.angularrestspringsecurity.entity.User</class>
</persistence-unit>
</persistence>
和Database Iniatilizer类：
package net.dontdrinkandroot.example.angularrestspringsecurity.dao;
import java.util.Date;
import net.dontdrinkandroot.example.angularrestspringsecurity.dao.newsentry.NewsEntryDao;
import net.dontdrinkandroot.example.angularrestspringsecurity.dao.user.UserDao;
import net.dontdrinkandroot.example.angularrestspringsecurity.entity.NewsEntry;
import net.dontdrinkandroot.example.angularrestspringsecurity.entity.User;
import org.springframework.security.crypto.password.PasswordEncoder;
/**
* Initialize the database with some test entries.
*
* @author Philip W. Sorst <philip@sorst.net>
*/
public class DataBaseInitializer
{
private NewsEntryDao newsEntryDao;
private UserDao userDao;
private PasswordEncoder passwordEncoder;
protected DataBaseInitializer()
{
/* Default constructor for reflection instantiation */
}
public DataBaseInitializer(UserDao userDao, NewsEntryDao newsEntryDao, PasswordEncoder passwordEncoder)
{
this.userDao = userDao;
this.newsEntryDao = newsEntryDao;
this.passwordEncoder = passwordEncoder;
}
public void initDataBase()
{
User userUser = new User("user", this.passwordEncoder.encode("user"));
userUser.addRole("user");
this.userDao.save(userUser);
User adminUser = new User("admin", this.passwordEncoder.encode("admin"));
adminUser.addRole("user");
adminUser.addRole("admin");
this.userDao.save(adminUser);
long timestamp = System.currentTimeMillis() - 1000 * 60 * 60 * 24;
for (int i = 0; i < 10; i++) {
NewsEntry newsEntry = new NewsEntry();
newsEntry.setContent("This is example content " + i);
newsEntry.setDate(new Date(timestamp));
this.newsEntryDao.save(newsEntry);
timestamp += 1000 * 60 * 60;
}
}
}
答案 0 :(得分：3)
错误是因为调度程序Servlet文件。声明实体管理员的正确方式是不同的。 DatabaseInitilizer Class用于以加密格式初始化数据库用户名和密码。
答案 1 :(得分：0)
在passwordEncoder中构建和设置DataBaseInitializer的位置是什么？在此处调用initDataBase()时，它看起来仍然为空：
User userUser = new User("user", this.passwordEncoder.encode("user"));