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spring中通过ApplicationContext getBean获取注入对象的方法实例

2023-08-25 07:04:04 160

用SpringContextUtil实现ApplicationContextAware

packageutil;
importjava.util.Locale;
importorg.springframework.beans.BeansException;
importorg.springframework.context.ApplicationContext;
importorg.springframework.context.ApplicationContextAware;
publicclassSpringContextUtil
implementsApplicationContextAware
{
privatestaticApplicationContextcontext;
@Override
publicvoidsetApplicationContext(ApplicationContextcontex)
throwsBeansException
{
System.out.println("--------------------contex---------"+contex);
SpringContextUtil.context=contex;
}
publicstaticApplicationContextgetApplicationContext(){
returncontext;
}
publicstaticObjectgetBean(StringbeanName){
returncontext.getBean(beanName);
}
publicstaticStringgetMessage(Stringkey){
returncontext.getMessage(key,null,Locale.getDefault());
}
}

工具类

packageredis;
importredis.clients.jedis.JedisPool;
importutil.SpringContextUtil;
publicclassRedisUtil{
privatestaticJedisPooljedisPool;
static{
jedisPool=(JedisPool)SpringContextUtil.getBean("jedisPool");
}
publicstaticJedisPoolgetJedisPool(){
if(jedisPool==null){
jedisPool=(JedisPool)SpringContextUtil.getBean("jedisPool");
}
returnjedisPool;
}
publicvoidflusDB(){
jedisPool.getResource().flushDB();
}
publicstaticStringset(Stringkey,Stringvalue){
returnjedisPool.getResource().set(key,value);
}
publicstaticStringget(Stringkey){
returnjedisPool.getResource().get(key);
}
publicstaticLongdel(Stringkey){
returnjedisPool.getResource().del(key);
}
}

在Spring的配置文件中配置这个类，Spring容器会在加载完Spring容器后把上下文对象调用这个对象中的setApplicationContext方法







classpath:jdbc.properties
classpath:redis.properties





在web项目中的web.xml中配置加载Spring容器的Listener


org.springframework.web.context.ContextLoaderListener

spring配置文件注入Bean类

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spring中通过ApplicationContext getBean获取注入对象的方法实例

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