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

发布于 2020-12-19|

复制链接

分享一篇关于关于spring中通过ApplicationContext getBean获取注入对象的方法实例，小妖觉得内容挺不错的，现在分享给大家，具有很好的参考价值，需要的朋友一起跟随小妖来看看吧

用SpringContextUtil实现ApplicationContextAware

```java

package util;

import java.util.Locale;

import org.springframework.beans.BeansException;

import org.springframework.context.ApplicationContext;

import org.springframework.context.ApplicationContextAware;

public class SpringContextUtil

implements ApplicationContextAware

{

private static ApplicationContext context;

@Override

public void setApplicationContext(ApplicationContext contex)

throws BeansException

{

System.out.println("--------------------contex---------"+contex);

SpringContextUtil.context = contex;

}

public static ApplicationContext getApplicationContext() {

return context;

}

public static Object getBean(String beanName) {

return context.getBean(beanName);

}

public static String getMessage(String key) {

return context.getMessage(key, null, Locale.getDefault());

}

}

```

工具类

```java

package redis;

import redis.clients.jedis.JedisPool;

import util.SpringContextUtil;

public class RedisUtil {

private static JedisPool jedisPool;

static{

jedisPool = (JedisPool)SpringContextUtil.getBean("jedisPool");

}

public static JedisPool getJedisPool(){

if(jedisPool == null){

jedisPool = (JedisPool)SpringContextUtil.getBean("jedisPool");

}

return jedisPool;

}

public void flusDB(){

jedisPool.getResource().flushDB();

}

public static String set(String key,String value){

return jedisPool.getResource().set(key, value);

}

public static String get(String key){

return jedisPool.getResource().get(key);

}

public static Long del(String key){

return jedisPool.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

```xml

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

```xml

```