Skip to content

Instantly share code, notes, and snippets.

@wangshuai1992
Created April 20, 2020 09:33
Show Gist options
  • Star 0 You must be signed in to star a gist
  • Fork 0 You must be signed in to fork a gist
  • Save wangshuai1992/f907b218d5cd6fbeb9c742cf3c7c3671 to your computer and use it in GitHub Desktop.
Save wangshuai1992/f907b218d5cd6fbeb9c742cf3c7c3671 to your computer and use it in GitHub Desktop.
SpringUtil.java
@Component
public class SpringUtil implements ApplicationContextAware {
/**
* Spring应用上下文环境
*/
private static ApplicationContext applicationContext;
/**
* 获取对象
*
* @param name
* @return Object 一个以所给名字注册的bean的实例
* @throws BeansException
*/
public static Object getBean(String name) {
return applicationContext.getBean(name);
}
/**
* 获取类型为requiredType的对象 如果bean不能被类型转换,相应的异常将会被抛出(BeanNotOfRequiredTypeException)
*
* @param name
* bean注册名
* @param requiredType
* 返回对象类型
* @return Object 返回requiredType类型对象
* @throws BeansException
*/
public static <T> T getBean(String name, Class<T> requiredType) {
return applicationContext.getBean(name, requiredType);
}
/**
* 根据类型获取bean
*
* @param requiredType
* @param <T>
* @return
* @throws BeansException
*/
public static <T> T getBean(Class<T> requiredType) {
return applicationContext.getBean(requiredType);
}
/**
* 如果BeanFactory包含一个与所给名称匹配的bean定义,则返回true
*
* @param name
* @return boolean
*/
public static boolean containsBean(String name) {
return applicationContext.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)
*
* @param name
* @return boolean
* @throws NoSuchBeanDefinitionException
*/
public static boolean isSingleton(String name) {
return applicationContext.isSingleton(name);
}
/**
* @param name
* @return Class 注册对象的类型
* @throws NoSuchBeanDefinitionException
*/
@SuppressWarnings("rawtypes")
public static Class getType(String name) {
return applicationContext.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
*
* @param name
* @return
* @throws NoSuchBeanDefinitionException
*/
public static String[] getAliases(String name) {
return applicationContext.getAliases(name);
}
@Override
public void setApplicationContext(ApplicationContext applicationContext) {
SpringUtil.applicationContext = applicationContext;
}
/**
* 获取 {@link #applicationContext}
*
* @return 返回 {@link #applicationContext}
*/
public static ApplicationContext getApplicationContext() {
return applicationContext;
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment