如何在Play Framework中捕获413错误？

import play.http.HttpErrorHandler;
import play.mvc.Http;
import play.mvc.Result;
import play.mvc.Results;

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionStage;

public class CustomErrorHandler implements HttpErrorHandler {

    @Override
    public CompletionStage<Result> onServerError(Http.RequestHeader request, Throwable exception) {
        if (exception instanceof HttpEntityTooLargeException) {
            // 处理413错误
            return CompletableFuture.completedFuture(Results.badRequest("请求实体过大，请上传较小的文件。"));
        } else {
            // 处理其他错误
            return CompletableFuture.completedFuture(Results.internalServerError("服务器内部错误。"));
        }
    }
}

play.http.errorHandler = "CustomErrorHandler"