在spring启动应用程序中获取springSecurityFilterChain bean异常-Java 学习之路

我正在使用带有以下安全文件的数据库在spring boot中创建一个安全应用程序：package com.example;

import javax.sql.DataSource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.access.SecurityConfig;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;

@Configuration
public class SecureLogin extends WebSecurityConfigurerAdapter{



    private DataSource dataSource;
    @Override
    public void configure(AuthenticationManagerBuilder auth)
            throws Exception {
        dataSource=(DataSource) DeleteitagainApplication.ctx.getBean("dataSource");
        auth.jdbcAuthentication().dataSource(dataSource).  
    usersByUsernameQuery("select username,password, enabled from users where username=?").
authoritiesByUsernameQuery("select username, role from user_roles where username=?");

    }

       @Override
        protected void configure(HttpSecurity http) throws Exception {
            http
            .csrf().disable()
           .authorizeRequests()
           .antMatchers("/css/**","/js/**","/view/**","/**").permitAll()
           .anyRequest().authenticated()
           .and()
       .formLogin().permitAll()
            .and()
       .logout().permitAll();
        }


    }

为此我得到以下例外：

org.springframework.beans.factory.BeanCreationException：在类路径资源[org / springframework / security / config / annotation / web / configuration / WebSecurityConfiguration.class]中定义名称为“springSecurityFilterChain”的bean创建错误：通过工厂方法进行Bean实例化失败;嵌套异常是org.springframework.beans.BeanInstantiationException：无法实例化[javax.servlet.Filter]：工厂方法'springSecurityFilterChain'抛出异常;嵌套异常是org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod（ConstructorResolver.java:599）〜[spring-beans-4.2.7.RELEASE.jar：4.2.7.RELEASE]中的java.lang.NullPointerException org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod（AbstractAutowireCapableBeanFactory.java:1123）〜[spring-beans-4.2.7.RELEASE.jar：4.2.7.RELEASE] org.springframework.beans.factory.support .AbstractAutowireCapableBeanFactory.createBeanInstance（AbstractAutowireCapableBeanFactory.java:1018）〜[spring-beans-4.2.7.RELEASE.jar：4.2.7.RELEASE] org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java： 510）〜[spring-beans-4.2.7.RELEASE.jar：4.2.7.RELEASE] org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:482）〜[spring-beans-4.2 .7.RELEASE.jar：4.2.7.RELEASE]在org.sp orframe.springframework.beans.factory.support上的ringframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:306）〜[spring-beans-4.2.7.RELEASE.jar：4.2.7.RELEASE] . 在org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:30）的DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:230）〜[spring-beans-4.2.7.RELEASE.jar：4.2.7.RELEASE] ）〜[spring-beans-4.2.7.RELEASE.jar：4.2.7.RELEASE]在org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:202）〜[spring-beans-4.2 . 7.RELEASE.jar：4.2.7.RELEASE]在org.springframework.context.support.AbstractApplicationContext.getBean（AbstractApplicationContext.java:1060）〜[spring-context-4.2.7.RELEASE.jar：4.2.7.RELEASE ] org.springframework.web.filter.DelegatingFilterProxy.initDelegate（DelegatingFilterProxy.java:326）〜[spring-web-4.2.7.RELEASE.jar：4.2.7.RELEASE] org.springframework.web.filter.DelegatingFilterProxy .initFilterB ean（DelegatingFilterProxy.java:235）〜[spring-web-4.2.7.RELEASE.jar：4.2.7.RELEASE] org.springframework.web.filter.GenericFilterBean.init（GenericFilterBean.java:199）〜[spring -web-4.2.7.RELEASE.jar：4.2.7.RELEASE]在org.apache.catalina.core.ApplicationFilterConfig.initFilter（ApplicationFilterConfig.java:279）〜[tomcat-embed-core-8.0.36.jar： 8.0.36] org.apache.catalina.core.ApplicationFilterConfig . （ApplicationFilterConfig.java:109）〜[tomcat-embed-core-8.0.36.jar：8.0.36] at org.apache.catalina.core.StandardContext .filterStart（StandardContext.java:4689）[tomcat-embed-core-8.0.36.jar：8.0.36] at org.apache.catalina.core.StandardContext.startInternal（StandardContext.java:5329）[tomcat-embed- core-8.0.36.jar：8.0.36] org.apache.catalina.util.LifecycleBase.start（LifecycleBase.java:147）[tomcat-embed-core-8.0.36.jar：8.0.36] at org .apache.catalina.core.ContainerBase $ StartChild.call（ContainerBase.java:1407）[tomcat-embed-core-8.0.36.jar：8.0.36] at org.apache.catalina.core.ContainerBase $ StartChi ld.call（ContainerBase.java:1397）[tomcat-embed-core-8.0.36.jar：8.0.36] at java.util.concurrent.FutureTask.run（Unknown Source）[na：1.8.0_91] at java .util.concurrent.ThreadPoolExecutor.runWorker（未知来源）[na：1.8.0_91] at java.util.concurrent.ThreadPoolExecutor $ Worker.run（Unknown Source）[na：1.8.0_91] at java.lang.Thread.run （未知来源）[na：1.8.0_91]引起：org.springframework.beans.BeanInstantiationException：无法实例化[javax.servlet.Filter]：工厂方法'springSecurityFilterChain'抛出异常;嵌套异常是org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate（SimpleInstantiationStrategy.java:189）〜[spring-beans-4.2.7.RELEASE.jar：4.2.7.RELEASE]中的java.lang.NullPointerExceptionorg.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod（ConstructorResolver.java:588）〜[spring-beans-4.2.7.RELEASE.jar：4.2.7.RELEASE] ... 23个常用帧省略引起： java.lang.NullPointerException：null at com.example.SecureLogin.configure（SecureLogin.java:22）〜[classes /：na] at org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter.authenticationManager（WebSecurityConfigurerAdapter . java：234）〜[spring-security-config-4.0.4.RELEASE.jar：4.0.4.RELEASE]

我有下面的pom.xml

http://maven.apache.org/xsd/maven-4.0.0.xsd“> 4.0.0

<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>deleteitagain</name>
<description>Demo project for Spring Boot</description>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.3.5.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <java.version>1.8</java.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-security</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
            <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <scope>runtime</scope>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-jpa -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
        <version>1.3.5.RELEASE</version>
    </dependency>

</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

！

在spring启动应用程序中获取springSecurityFilterChain bean异常

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