自定义异常信息

1. 上面的这些异常信息我们可以加入一些自定义的内容 ```java @Configuration public class CustomerConfig {

   @Bean public CustomerErrorAttribute customerErrorAttribute(){

    return new CustomerErrorAttribute(true);

   }

}

```java
public class CustomerErrorAttribute extends DefaultErrorAttributes {
    /**
     * 最大栈元素
     */
    private final int MAX_STACK_TRACE_ELEMENT = 5;
    public CustomerErrorAttribute(boolean includeException) {
        super(includeException);
    }
    @Override
    public Map<String, Object> getErrorAttributes(WebRequest webRequest, boolean includeStackTrace) {
        Map<String, Object> result =  super.getErrorAttributes(webRequest, includeStackTrace);
        Throwable throwable = super.getError(webRequest);
        try {
            // 增加exception相关的信息，用来在通过feign调用的客户端进行反序列化，实现feign rpc的异常处理
            List<StackTraceElement> steList = new LinkedList<>();
            for(StackTraceElement stackTraceElement : throwable.getStackTrace()) {
                steList.add(stackTraceElement);
                if(steList.size() >= MAX_STACK_TRACE_ELEMENT) {
                    break;
                }
            }
            throwable.setStackTrace(steList.toArray(new StackTraceElement[steList.size()]));
            result.put("message","勇士总冠军");
            result.put("exception_detail", JSONObject.toJSONString(throwable));
            result.put("author","gaoxi");
            result.put("phone","18751669318");
        } catch (Exception e) {
            e.setStackTrace(new StackTraceElement[0]);
            result.put("exception_detail", e);
        }
        return result;
    }
}

1. 自定义异常信息后