Java：重寫的方法不會拋出“ java.lang.Throwable”

Question

我正在關注編譯時錯誤

call(play.mvc.Http.Context) in actions.Headers cannot override call(play.mvc.Http.Context) in play.mvc.Action
[error]   overridden method does not throw java.lang.Exception
[error]        public CompletionStage<Result> call(final Http.Context ctx) throws Throwable {

這是代碼：

public CompletionStage<Result> call(final Http.Context ctx) throws Throwable {
           ctx.response().setHeader("Access-Control-Allow-Origin", "*");
           ctx.response().setHeader("Allow", "*");
           ctx.response().setHeader("Access-Control-Allow-Methods", "POST, GET, PUT, DELETE, OPTIONS");
           ctx.response().setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Referer, User-Agent, token");
           ctx.response().setHeader("Access-Control-Expose-Headers", "Origin, X-Requested-With, Content-Type, Accept, Referer, User-Agent, token");

           return (CompletionStage<Result>) delegate.call(ctx);
       }

我正在使用play framework 2.6

Answer 1

根據playframework 2.6的文檔 ，Action類中的方法調用不再拋出Thowable，因此您的方法也不能這樣做。

Answer 2

只需從您的方法聲明中刪除[throws Throwable]。