无法在假装构建器中抛出异常

Question

我试图在我的feign.builder中添加变量，但它一直在说

未处理的异常：java.net.URISyntaxException，java.io.IOException

抛出异常并不起作用既没有抓住任何想法如何解决这个问题？假期建造者：

 Interface.DeleteComment deleteComment = Feign.builder()
                                              .client(new OkHttpClient())
                                              .encoder(new JacksonEncoder())
                                              .decoder(new JacksonDecoder())
                                              .logger(new Slf4jLogger(Interface.DeleteComment.class))
                                              .logLevel(Logger.Level.FULL)
                                              .target(Interface.DeleteComment.class, 
                                                      "http://localhost:3000/comments/" + networkConfigurationProperties.id());

NetworkConfigurationProperties

public class NetworkConfigurationProperties  {
    public String id() throws URISyntaxException,IOException {
        final URI uri = new URI("http://localhost:3000/comments/");
        String path = uri.getPath();
        String idStr = path.substring(path.lastIndexOf('/') + 1);
        return idStr;
    }
}

Answer 1

你的id()方法可以抛出那些例外，这意味着它们必须被处理（某处）。

在你的通话方法中，你不能只说：

public void callId() {
Interface.DeleteComment deleteComment = Feign.builder()
                    .client(new OkHttpClient())
                    .encoder(new JacksonEncoder())
                    .decoder(new JacksonDecoder())
                    .logger(new Slf4jLogger(Interface.DeleteComment.class))
                    .logLevel(Logger.Level.FULL)
                    .target(Interface.DeleteComment.class, "http://localhost:3000/comments/" + networkConfigurationProperties.id());
}

因为你没有处理例外。你需要抓住它们：

public void callId() {
  try{
    Interface.DeleteComment deleteComment = Feign.builder()
                        .client(new OkHttpClient())
                        .encoder(new JacksonEncoder())
                        .decoder(new JacksonDecoder())
                        .logger(new Slf4jLogger(Interface.DeleteComment.class))
                        .logLevel(Logger.Level.FULL)
                        .target(Interface.DeleteComment.class, "http://localhost:3000/comments/" + networkConfigurationProperties.id());
    } catch(Exception e) {
    e.printStackTrace(); //or similar
   }
    }

或者让调用该方法的方法知道通过传播它们来预期可能的异常

public void callId() throws URISyntaxException,IOException {
Interface.DeleteComment deleteComment = Feign.builder()
                    .client(new OkHttpClient())
                    .encoder(new JacksonEncoder())
                    .decoder(new JacksonDecoder())
                    .logger(new Slf4jLogger(Interface.DeleteComment.class))
                    .logLevel(Logger.Level.FULL)
                    .target(Interface.DeleteComment.class, "http://localhost:3000/comments/" + networkConfigurationProperties.id());
}

Answer 2

在id（）方法中添加try catch块。您的id（）方法抛出两个已检查的异常，必须捕获该异常。尝试这样的事情：

public class NetworkConfigurationProperties  {
    public String id() {
         try {
            final URI uri = new URI("http://localhost:3000/comments/");
            String path = uri.getPath();
            String idStr = path.substring(path.lastIndexOf('/') + 1);
            return idStr;
         } catch (URISyntaxException|IOException e) {
            return null;
         }
    }
}