Spring WebClient 获取请求返回“连接被拒绝：localhost/”答案

【问题标题】：Spring WebClient get request return "Connection refused: localhost/"Spring WebClient 获取请求返回“连接被拒绝：localhost/”
【发布时间】：2020-04-16 15:53:53
【问题描述】：

当我尝试使用 WebClient 发送 GET 请求时，我收到错误 io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection denied: localhost/

的响应

* WebClient 初始化 *

//hostname = "localhost/127.0.0.1:8081"
//contextPath = "user-service"

    @Bean
    public WebClient userWebclient(@Value("${service.user.hostname}") final String hostname,
                                  @Value("${service.user.contextPath}") final String contextPath) {
        return WebClient
                .builder()
                .baseUrl(hostname + contextPath)
                .build();
    }

* 控制器 *

    private final WebClient userWebclient;

    @GetMapping(value = "/user/{id}", produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
    public Mono<String> getUserById(@NotNull @PathVariable String userId) {
        userWebclient.

        return userWebclient.get()
               .uri("/UserMock/user/" + userId)
               .header("Accept", "application/json")
               .header("Authorization", "Bearer =........")
               .exchange()
               .flatMap(response -> response.bodyToMono(String.class));
    }

错误信息

io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: localhost/127.0.0.1:8081
    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
    at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:327)
    at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:340)
    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:665)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:612)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:529)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:491)
    at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:905)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.net.ConnectException: Connection refused
    ... 10 common frames omitted

【问题讨论】：

标签： java spring-boot spring-webflux

【解决方案1】：

在主机中使用任一

hostname = "localhost:8081"

或

hostname = "127.0.0.1:8081"

代替

hostname = "localhost/127.0.0.1:8081"

【讨论】：

【解决方案2】：

检查您的地址是否正确，此错误可能是因为您的端口号不正确，如 8081，但应该是 8080

【讨论】：

废话！没错，我的端口不对，应该是8181。