Spring Boot redisTemplate 自动装配失败 [英] Spring Boot redisTemplate autowiring failed
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问题描述
我尝试将 spring boot + redis 集成到我的应用程序中.
I tried to integrate spring boot + redis into my application.
pom.xml 中的相关设置如下，
Related settings in pom.xml is as below,
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
应用主要如下，
@SpringBootApplication
@EnableTransactionManagement
@ImportResource({"classpath*:applicationContext.xml"})
public class ExamsCenterApplication {
public static void main(String[] args) {
SpringApplication.run(ExamsCenterApplication.class, args);
}
}
applicationContext.xml 的内容如下，
Contents of applicationContext.xml is as below,
<?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:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:util="http://www.springframework.org/schema/util"
xmlns:mybatis="http://mybatis.org/schema/mybatis-spring" xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://mybatis.org/schema/mybatis-spring
http://mybatis.org/schema/mybatis-spring.xsd">
<bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">
<property name="securityManager" ref="securityManager" />
<property name="loginUrl" value="/login.jsp" />
<property name="successUrl" value="/index.jsp" />
<property name="unauthorizedUrl" value="/unauthorized.jsp" />
<property name="filters">
<util:map>
<entry key="authc">
<bean
class="org.apache.shiro.web.filter.authc.PassThruAuthenticationFilter" />
</entry>
</util:map>
</property>
<property name="filterChainDefinitions">
<value>
/marktask/list/ = authc, perms[scoretask:view]
/marktask/view/ = authc, perms[scoretask:view]
/** = anon
</value>
</property>
</bean>
<bean id="examCenter" class="org.apache.tomcat.jdbc.pool.DataSource"
destroy-method="close">
<property name="poolProperties">
<bean class="org.apache.tomcat.jdbc.pool.PoolProperties">
<property name="url"
value="jdbc:mysql://192.168.100.21:13306/ustudy?characterEncoding=UTF-8&serverTimezone=UTC" />
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="username" value="root" />
<property name="password" value="mysql" />
<property name="testWhileIdle" value="true" />
<property name="testOnBorrow" value="true" />
<property name="validationInterval" value="30000" />
<property name="testOnReturn" value="false" />
<property name="validationQuery" value="/* ping */" />
<property name="timeBetweenEvictionRunsMillis" value="30000" />
<property name="maxActive" value="100" />
<property name="initialSize" value="10" />
<property name="maxWait" value="10000" />
<!-- <property name="removeAbandonedTimeout" value="60"/> <property name="minEvictableIdleTimeMillis"
value="30000"/> <property name="minIdle" value="10"/> <property name="logAbandoned"
value="true"/> <property name="removeAbandoned" value="true"/> <property
name="jdbcInterceptors" value="org.apache.tomcat.jdbc.pool.interceptor.ConnectionState;org.apache.tomcat.jdbc.pool.interceptor.StatementFinalizer"/> -->
</bean>
</property>
</bean>
<bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">
<!-- Single realm app. If you have multiple realms, use the 'realms' property
instead. -->
<property name="realm" ref="authRealm" />
<!-- By default the servlet container sessions will be used. Uncomment
this line to use shiro's native sessions (see the JavaDoc for more): -->
<!-- <property name="sessionMode" value="native"/> -->
</bean>
<bean id="lifecycleBeanPostProcessor" class="org.apache.shiro.spring.LifecycleBeanPostProcessor" />
<!-- Define the Shiro Realm implementation you want to use to connect to
your back-end -->
<!-- security datasource: -->
<bean id="authRealm" class="org.apache.shiro.realm.jdbc.JdbcRealm">
<property name="dataSource" ref="examCenter" />
<property name="permissionsLookupEnabled" value="true" />
<property name="authenticationQuery"
value="select passwd from ustudy.teacher where teacid = ?" />
<property name="userRolesQuery"
value="select role_name from ustudy.teacherroles where teac_id = ?" />
<property name="permissionsQuery"
value="select perm from ustudy.perms where role_name = ?" />
</bean>
<bean
class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator"
depends-on="lifecycleBeanPostProcessor" />
<bean
class="org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor">
<property name="securityManager" ref="securityManager" />
</bean>
<!-- Secure Spring remoting: Ensure any Spring Remoting method invocations
can be associated with a Subject for security checks. -->
<bean id="secureRemoteInvocationExecutor"
class="org.apache.shiro.spring.remoting.SecureRemoteInvocationExecutor">
<property name="securityManager" ref="securityManager" />
</bean>
<!-- Noted: Two methods for enabling spring transaction managent with jdbc.
Above is XML based configuration. Declaring with @Transactional in java source
code is also very flexible. -->
<tx:annotation-driven transaction-manager="txManager" />
<bean id="txManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="examCenter" />
</bean>
<!-- sql session factory for mybatis -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="examCenter" />
<property name="mapperLocations" value="classpath:com/ustudy/exam/mapping/*.xml"></property>
</bean>
<!-- scan for mappers and make them autowired -->
<mybatis:scan base-package="com.ustudy.exam.mapper" />
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.ustudy.exam.dao" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
</bean>
<!-- spring data redis related configurations -->
<bean id="jedisConnectionFactory"
class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
p:use-pool="true" p:database="0" p:host-name="192.168.100.21" p:port="6379"
p:timeout="100" />
<!-- redis template definition -->
<bean id="stringSerializer"
class="org.springframework.data.redis.serializer.StringRedisSerializer" />
<bean id="jdkSerializer"
class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer" />
<bean id="jsonSerializer"
class="org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer" />
<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate"
p:connection-factory-ref="jedisConnectionFactory">
<property name="keySerializer" ref="stringSerializer" />
<property name="valueSerializer" ref="jsonSerializer" />
</bean>
<context:annotation-config />
<bean
class="org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration" />
我的服务代码如下，
@Service
public class MetaInfo {
private static final Logger logger = LogManager.getLogger(MetaInfo.class);
@Autowired
@Qualifier("redisTemplate")
private RedisTemplate<String, Object> redisT;
/*
* only need basic information about this question, assign mode. not sure whether other info needed.
*/
public QuesMeta getMetaTaskInfo(String quesid) {
logger.debug("getMetaTaskInfo() hitted");
QuesMeta qm = new QuesMeta("redistest", "auto");
redisT.opsForValue().set("001", qm);
if (redisT == null) {
logger.debug("getMetaTaskInfo(), redisTemplate is not initialized.");
return null;
}
redisT.opsForValue().set("redistest", "hello");
logger.debug("getMetaTaskInfo(), stored data in redis");
return null;
}
然后运行程序，得到如下异常，
Then run the program and got the following exception,
java.lang.NullPointerException: null
at com.ustudy.cache.MetaInfo.getMetaTaskInfo(MetaInfo.java:42) ~[classes/:0.0.1-SNAPSHOT]
at com.ustudy.exam.controller.MarkTaskController.getMarkTask(MarkTaskController.java:37) ~[classes/:0.0.1-SNAPSHOT]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_151]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_151]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_151]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_151]
似乎下面的代码出错了.
It seemed that following code went wrong.
@Autowired
private RedisTemplate<String, String> redisT;
redisT 为空且未按预期初始化.
redisT is null and not initialized as expected.
我应该如何解决这个问题?
How should I do to fix this issue?
非常感谢.
推荐答案
我确实在控制器代码中犯了一个错误.我的原始控制器代码如下，
I really made a mistake in my controller code. My origin controller code is as below,
@RestController
@RequestMapping(value="/exam/")
public class MarkTaskController {
private static final Logger logger = LogManager.getLogger(MarkTaskController.class);
@Autowired
private MarkTaskService stS;
@RequestMapping(value = "/marktask/list/", method = RequestMethod.GET)
public List<MarkTaskBrife> getMarkTask(HttpServletResponse resp) {
logger.debug("getMarkTask(), start to retrieving all examination result.");
new MetaInfo().getMetaTaskInfo(null);
return null;
代码new MetaInfo()"不正确.它也应该自动装配如下，
The code "new MetaInfo()" is not correct. It should also be autowired as below,
@Autowired
private MetaInfo mi;
@RequestMapping(value = "/marktask/list/", method = RequestMethod.GET)
public List<MarkTaskBrife> getMarkTask(HttpServletResponse resp) {
logger.debug("getMarkTask(), start to retrieving all examination result.");
mi.getMetaTaskInfo(null);
return null;
然后一切正常.
非常感谢@Chacko 在此问题上的帮助.
Thanks @Chacko a lot for help on this issue.
这篇关于Spring Boot redisTemplate 自动装配失败的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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