解决WebSocket无法依赖注入的问题（Spring）

我本来想依赖注入redisTemplate，但是怎么注入都为null

修改前

SocketServer.class

基本代码如下：

@ServerEndpoint(value = "/socket")
@Component
public class SocketServer{

@Autowired
private RedisTemplate<String, String> redisTemplate;}

最后搜索了一下

首先要实现ApplicationContextAware接口

另写一个SpringUtil类

@Component
public class SpringUtil implements ApplicationContextAware {

private static ApplicationContext applicationContext = null;

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

//获取applicationContext
public static ApplicationContext getApplicationContext() {
return applicationContext;
}

//通过name获取 Bean.
public static Object getBean(String name){
return getApplicationContext().getBean(name);

}

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

//通过name,以及Clazz返回指定的Bean
public static <T> T getBean(String name,Class<T> clazz){
return getApplicationContext().getBean(name, clazz);
}

}

所以修改SocketServer.class类如下

@ServerEndpoint(value = "/userWebsocket")
@Component
public class UserMessageSocketServer{

@Autowired
private RedisTemplate<String, String> redisTemplate = (RedisTemplate<String, String>) SpringUtil.getBean("stringRedisTemplate");}

利用ApplicationContext接口获取Bean即可