SpringContextUtils

标签：return name getApplicationContext static SpringContextUtils public String

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

@Component
public class SpringContextUtils implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringContextUtils.applicationContext=applicationContext;
    }

    public static Object getBean(String name){
        return getApplicationContext().getBean(name);
    }

    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }


    /**
     * 通过class获取Bean.
     * @param <T>
     * @param clazz
     * @return
     */
    public static <T> T getBean(Class<T> clazz){
        return getApplicationContext().getBean(clazz);
    }

    /**
     * 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) throws BeansException {
        return getApplicationContext().getBean(name, 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 getApplicationContext().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) throws NoSuchBeanDefinitionException {
        return getApplicationContext().isSingleton(name);
    }

    /**
     * @param name
     * @return Class 注册对象的类型
     * @throws NoSuchBeanDefinitionException
     */
    public static Class<?> getType(String name) throws NoSuchBeanDefinitionException {
        return getApplicationContext().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) throws NoSuchBeanDefinitionException {
        return getApplicationContext().getAliases(name);
    }

    /**
     * 获取配置文件配置项的值
     *
     * @param key 配置项key
     */
    public static String getEnvironmentProperty(String key) {
        return getApplicationContext().getEnvironment().getProperty(key);
    }

    /**
     * 获取配置文件配置项的值，未获取到时返回默认值
     *
     * @param key 配置项key
     */
    public static String getEnvironmentProperty(String key, String defaultVal) {
        return getEnvironmentProperty(key) == null ? defaultVal : getEnvironmentProperty(key);
    }


    public static String getActiveProfile() {
        return getApplicationContext().getEnvironment().getActiveProfiles()[0];
    }

    public  static String[] getBeanName(Class<?> clazz){
        return getApplicationContext().getBeanNamesForType(clazz);
    }


}

标签：return,name,getApplicationContext,static,SpringContextUtils,public,String
From： https://www.cnblogs.com/lyuSky/p/17352192.html