Springboot实现多线程注入bean的工具类操作
场景：使用springboot多线程，线程类无法自动注入需要的bean
解决方法：通过工具类获取需要的bean
工具类代码：
importorg.springframework.beans.BeansException;
importorg.springframework.context.ApplicationContext;
importorg.springframework.context.ApplicationContextAware;
importorg.springframework.stereotype.Component;
/**
*@Description:获取bean对象的工具类
*@Author:ZhangLin
*@CreateDate:2018/12/10
*/
@Component
publicclassApplicationContextProviderimplementsApplicationContextAware{
/**
*上下文对象实例
*/
privatestaticApplicationContextapplicationContext;
@Override
publicvoidsetApplicationContext(ApplicationContextapplicationContext)throwsBeansException{
this.applicationContext=applicationContext;
}
/**
*获取applicationContext
*
*@return
*/
publicstaticApplicationContextgetApplicationContext(){
returnapplicationContext;
}
/**
*通过name获取Bean.
*
*@paramname
*@return
*/
publicstaticObjectgetBean(Stringname){
returngetApplicationContext().getBean(name);
}
/**
*通过class获取Bean.
*
*@paramclazz
*@param
*@return
*/
publicstaticTgetBean(Classclazz){
returngetApplicationContext().getBean(clazz);
}
/**
*通过name,以及Clazz返回指定的Bean
*
*@paramname
*@paramclazz
*@param
*@return
*/
publicstaticTgetBean(Stringname,Classclazz){
returngetApplicationContext().getBean(name,clazz);
}
}
使用方法：
在线程类的构造函数里调用工具类的getBeans方法获取实例，如：
publicclassThreadAimplementsRunnable{
privateServiceservice;
publicThreadA(){
this.service=ApplicationContextProvider.getBean(Service.class);
}
@Override
publicvoidrun(){
//TOBEDONE
}
}
补充知识：在springboot中普通的线程类访问service类
1、首先在线程类上注解@Component
2、@Autowired
privateIStudentServicestudentService;
3、调用时候
studentService=SpringUtils.getBean("studentService");
4、SpringUtils
packagecom.ruoyi.common.utils.spring;
importorg.springframework.beans.BeansException;
importorg.springframework.beans.factory.NoSuchBeanDefinitionException;
importorg.springframework.beans.factory.config.BeanFactoryPostProcessor;
importorg.springframework.beans.factory.config.ConfigurableListableBeanFactory;
importorg.springframework.context.ApplicationContext;
importorg.springframework.context.ApplicationContextAware;
importorg.springframework.stereotype.Component;
/**
*spring工具类方便在非spring管理环境中获取bean
*
*@authorruoyi
*/
@Component
publicfinalclassSpringUtilsimplementsBeanFactoryPostProcessor,ApplicationContextAware
{
/**Spring应用上下文环境*/
privatestaticConfigurableListableBeanFactorybeanFactory;
privatestaticApplicationContextapplicationContext=null;
@Override
publicvoidpostProcessBeanFactory(ConfigurableListableBeanFactorybeanFactory)throwsBeansException
{
SpringUtils.beanFactory=beanFactory;
}
/**
*获取对象
*
*@paramname
*@returnObject一个以所给名字注册的bean的实例
*@throwsorg.springframework.beans.BeansException
*
*/
@SuppressWarnings("unchecked")
publicstaticTgetBean(Stringname)throwsBeansException
{
return(T)beanFactory.getBean(name);
}
/**
*获取类型为requiredType的对象
*
*@paramclz
*@return
*@throwsorg.springframework.beans.BeansException
*
*/
publicstaticTgetBean(Classclz)throwsBeansException
{
Tresult=(T)beanFactory.getBean(clz);
returnresult;
}
/**
*如果BeanFactory包含一个与所给名称匹配的bean定义，则返回true
*
*@paramname
*@returnboolean
*/
publicstaticbooleancontainsBean(Stringname)
{
returnbeanFactory.containsBean(name);
}
/**
*判断以给定名字注册的bean定义是一个singleton还是一个prototype。如果与给定名字相应的bean定义没有被找到，将会抛出一个异常（NoSuchBeanDefinitionException）
*
*@paramname
*@returnboolean
*@throwsorg.springframework.beans.factory.NoSuchBeanDefinitionException
*
*/
publicstaticbooleanisSingleton(Stringname)throwsNoSuchBeanDefinitionException
{
returnbeanFactory.isSingleton(name);
}
/**
*@paramname
*@returnClass注册对象的类型
*@throwsorg.springframework.beans.factory.NoSuchBeanDefinitionException
*
*/
publicstaticClassgetType(Stringname)throwsNoSuchBeanDefinitionException
{
returnbeanFactory.getType(name);
}
/**
*如果给定的bean名字在bean定义中有别名，则返回这些别名
*
*@paramname
*@return
*@throwsorg.springframework.beans.factory.NoSuchBeanDefinitionException
*
*/
publicstaticString[]getAliases(Stringname)throwsNoSuchBeanDefinitionException
{
returnbeanFactory.getAliases(name);
}
@Override
publicvoidsetApplicationContext(ApplicationContextapplicationContext)throwsBeansException{
if(SpringUtils.applicationContext==null){
SpringUtils.applicationContext=applicationContext;
}
}
//获取applicationContext
publicstaticApplicationContextgetApplicationContext(){
returnapplicationContext;
}
}
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