SpringContextHolder作⽤
以静态变量保存Spring ApplicationContext, 可在任何代码任何地⽅任何时候取出ApplicaitonContext.
使⽤⽅式。在启动类⾥添加Bean
package com.yl;
import com.yl.utils.SpringContextHolder;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import t.annotation.Bean;
import org.springframework.scheduling.annotation.EnableAsync;
import ansaction.annotation.EnableTransactionManagement;
@SpringBootApplication
@EnableTransactionManagement
public class MainApplication {
public static void main(String[] args) {
SpringApplication.run(MainApplication.class, args);
}
@Bean
public SpringContextHolder springContextHolder() {
return new SpringContextHolder();
}
}
package com.yl.utils;
slf4j.Slf4j;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.DisposableBean;
import t.ApplicationContext;
import t.ApplicationContextAware;
/**
* @author
* @date
*/
@Slf4j
public class SpringContextHolder implements ApplicationContextAware, DisposableBean {
private static ApplicationContext applicationContext = null;
/**
* 取得存储在静态变量中的ApplicationContext.
*/
public static ApplicationContext getApplicationContext() {
assertContextInjected();
spring怎么读啊return applicationContext;
}
/**
* 从静态变量applicationContext中取得Bean, ⾃动转型为所赋值对象的类型.
*/
public static <T> T getBean(String name) {
assertContextInjected();
return (T) Bean(name);
}
/**
* 从静态变量applicationContext中取得Bean, ⾃动转型为所赋值对象的类型.
*/
public static <T> T getBean(Class<T> requiredType) {
assertContextInjected();
Bean(requiredType);
}
/
**
* 检查ApplicationContext不为空.
*/
private static void assertContextInjected() {
if (applicationContext == null) {
throw new IllegalStateException("applicaitonContext属性未注⼊, 请在applicationContext" +
".xml中定义SpringContextHolder或在SpringBoot启动类中注册SpringContextHolder.");
}
}
/**
* 清除SpringContextHolder中的ApplicationContext为Null.
*/
public static void clearHolder() {
log.debug("清除SpringContextHolder中的ApplicationContext:"
+ applicationContext);
applicationContext = null;
}
@Override
public void destroy() throws Exception {
SpringContextHolder.clearHolder();
}
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
if (SpringContextHolder.applicationContext != null) {
log.warn("SpringContextHolder中的ApplicationContext被覆盖, 原有ApplicationContext为:" + SpringContextHolder.applicationContext);        }
SpringContextHolder.applicationContext = applicationContext;
}
}

版权声明：本站内容均来自互联网，仅供演示用，请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系QQ:729038198，我们将在24小时内删除。