Question

我尝试在出现连接错误时添加控件。我的目标是通过捕获它来阻止程序抛出异常。

try {
    Client client = ClientBuilder.newBuilder()
        .register(JacksonFeature.class)
        .build();
        client.register(new HttpBasicAuthFilter("login", "password"));
        WebTarget webTarget = client.target("http://path");
        Response response = webTarget.request().post(Entity.json(bean));
        System.out.println(response.getStatus());

} catch (Exception e) {
        // I do nothing here
}

但是它会在控制台中打印出来：

org.glassfish.jersey.client.ClientRequest writeEntity 严重：提交请求输出流时出错。 java.net.ConnectException：连接被拒绝：连接 at java.net.DualStackPlainSocketImpl.connect0（Native Method）在java.net.DualStackPlainSocketImpl.socketConnect（DualStackPlainSocketImpl.java:79） at java.net.AbstractPlainSocketImpl.doConnect（AbstractPlainSocketImpl.java:339） at java.net.AbstractPlainSocketImpl.connectToAddress（AbstractPlainSocketImpl.java:200） at java.net.AbstractPlainSocketImpl.connect（AbstractPlainSocketImpl.java:182）在java.net.PlainSocketImpl.connect（PlainSocketImpl.java:172）在java.net.SocksSocketImpl.connect（SocksSocketImpl.java:392）在java.net.Socket.connect（Socket.java:579）在sun.net.NetworkClient.doConnect（NetworkClient.java:175）在sun.net.www.http.HttpClient.openServer（HttpClient.java:432）在sun.net.www.http.HttpClient.openServer（HttpClient.java:527）在sun.net.www.http.HttpClient。（HttpClient.java:211）在sun.net.www.http.HttpClient.New（HttpClient.java:308）在sun.net.www.http.HttpClient.New（HttpClient.java:326）在sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient（HttpURLConnection.java:996） at sun.net.www.protocol.http.HttpURLConnection.plainConnect（HttpURLConnection.java:932）在sun.net.www.protocol.http.HttpURLConnection.connect（HttpURLConnection.java:850） at sun.net.www.protocol.http.HttpURLConnection.getOutputStream（HttpURLConnection.java:1091）在org.glassfish.jersey.client.HttpUrlConnector $ 3.getOutputStream（HttpUrlConnector.java:287）在org.glassfish.jersey.message.internal.CommittingOutputStream.commitStream（CommittingOutputStream.java:198）在org.glassfish.jersey.message.internal.CommittingOutputStream.commitStream（CommittingOutputStream.java:192）在org.glassfish.jersey.message.internal.CommittingOutputStream.commit（CommittingOutputStream.java:260）在org.glassfish.jersey.message.internal.OutboundMessageContext.commitStream（OutboundMessageContext.java:822）在org.glassfish.jersey.client.ClientRequest.writeEntity（ClientRequest.java:451）在org.glassfish.jersey.client.HttpUrlConnector._apply（HttpUrlConnector.java:290）在org.glassfish.jersey.client.HttpUrlConnector.apply（HttpUrlConnector.java:203）在org.glassfish.jersey.client.ClientRuntime.invoke（ClientRuntime.java:215）在org.glassfish.jersey.client.JerseyInvocation $ 1.call（JerseyInvocation.java:634）在org.glassfish.jersey.client.JerseyInvocation $ 1.call（JerseyInvocation.java:631）在org.glassfish.jersey.internal.Errors.process（Errors.java:315）在org.glassfish.jersey.internal.Errors.process（Errors.java:297）在org.glassfish.jersey.internal.Errors.process（Errors.java:228）在org.glassfish.jersey.process.internal.RequestScope.runInScope（RequestScope.java:426）在org.glassfish.jersey.client.JerseyInvocation.invoke（JerseyInvocation.java:631）在org.glassfish.jersey.client.JerseyInvocation $ Builder.method（JerseyInvocation.java:391）在org.glassfish.jersey.client.JerseyInvocation $ Builder.post（JerseyInvocation.java:300）在com.saintgobain.sg4p.igquality.desktop.DesktopClientController.sendToServer（DesktopClientController.java:857）在com.saintgobain.sg4p.igquality.desktop.DesktopClientController.handleSendToServerClicked（DesktopClientController.java:835） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method） at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57） at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43） at java.lang.reflect.Method.invoke（Method.java:606） at sun.reflect.misc.Trampoline.invoke（MethodUtil.java:75） at sun.reflect.GeneratedMethodAccessor1.invoke（Unknown Source）

如果我添加了catch部分：e.printStackTrace();

控制台还打印：

引起：java.net.ConnectException：连接被拒绝：连接 at java.net.DualStackPlainSocketImpl.connect0（Native Method）在java.net.DualStackPlainSocketImpl.socketConnect（DualStackPlainSocketImpl.java:79） at java.net.AbstractPlainSocketImpl.doConnect（AbstractPlainSocketImpl.java:339） at java.net.AbstractPlainSocketImpl.connectToAddress（AbstractPlainSocketImpl.java:200） at java.net.AbstractPlainSocketImpl.connect（AbstractPlainSocketImpl.java:182）在java.net.PlainSocketImpl.connect（PlainSocketImpl.java:172）在java.net.SocksSocketImpl.connect（SocksSocketImpl.java:392）在java.net.Socket.connect（Socket.java:579）在sun.net.NetworkClient.doConnect（NetworkClient.java:175）在sun.net.www.http.HttpClient.openServer（HttpClient.java:432）在sun.net.www.http.HttpClient.openServer（HttpClient.java:527）在sun.net.www.http.HttpClient。（HttpClient.java:211）在sun.net.www.http.HttpClient.New（HttpClient.java:308）在sun.net.www.http.HttpClient.New（HttpClient.java:326）在sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient（HttpURLConnection.java:996） at sun.net.www.protocol.http.HttpURLConnection.plainConnect（HttpURLConnection.java:932）在sun.net.www.protocol.http.HttpURLConnection.connect（HttpURLConnection.java:850） at sun.net.www.protocol.http.HttpURLConnection.getOutputStream（HttpURLConnection.java:1091）在org.glassfish.jersey.client.HttpUrlConnector $ 3.getOutputStream（HttpUrlConnector.java:287）在org.glassfish.jersey.message.internal.CommittingOutputStream.commitStream（CommittingOutputStream.java:198）在org.glassfish.jersey.message.internal.CommittingOutputStream.commitStream（CommittingOutputStream.java:192）在org.glassfish.jersey.message.internal.CommittingOutputStream.write（CommittingOutputStream.java:226）在org.codehaus.jackson.impl.Utf8Generator._flushBuffer（Utf8Generator.java:1754）在org.codehaus.jackson.impl.Utf8Generator.flush（Utf8Generator.java:1088）在org.codehaus.jackson.map.ObjectMapper.writeValue（ObjectMapper.java:1615）在org.codehaus.jackson.jaxrs.JacksonJsonProvider.writeTo（JacksonJsonProvider.java:559） at org.glassfish.jersey.message.internal.WriterInterceptorExecutor $ TerminalWriterInterceptor.aroundWriteTo（WriterInterceptorExecutor.java:194）在org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed（WriterInterceptorExecutor.java:139）在org.glassfish.jersey.message.internal.MessageBodyFactory.writeTo（MessageBodyFactory.java:1005）在org.glassfish.jersey.client.ClientRequest.writeEntity（ClientRequest.java:430）在org.glassfish.jersey.client.HttpUrlConnector._apply（HttpUrlConnector.java:290）在org.glassfish.jersey.client.HttpUrlConnector.apply（HttpUrlConnector.java:203） ... 78更多

很抱歉，如果我打印的堆栈跟踪太多......

我想知道如果我不打印堆栈跟踪，我怎么能让异常消失？谢谢:)）

Answer 1

看起来您的异常由框架记录并抛出到您的客户端代码中。可能要么无法抑制它，要么（如果通过日志记录API记录），您可以使用适当的日志记录级别配置来控制它。

为什么程序仍然抛出java.net.ConnectException甚至我添加了try..catch？

1 个答案: