com.netflix.hystrix.contrib.javanica.exception.FallbackDefinitionException: fallback method wasn't found: fallback
解決方法：
以下代碼就會出現這個錯誤：
@RequestMapping("/hello")
@ResponseBody
@HystrixCommand(fallbackMethod = "fallback")
public String sayHello(@RequestParam("txt") String txt) throws Exception {
if("0".equals(txt)){
throw new Exception();
}
return "收到你傳過來的參數爲："+txt;
}
public String fallback(){
return "系統正在維護中。。。";
}