java http 服务端 设置读超时时间

在Java中设置HTTP服务端的读超时时间通常涉及到使用`HttpURLConnection`或者第三方库如`Apache HttpClient`或`OkHttp`。这里以`HttpURLConnection`为例，你可以通过创建连接时设置`SocketTimeout`属性来实现读操作的超时：

URL url = new URL("http://example.com");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setReadTimeout(5000); // 设置超时时间为5秒，单位为毫秒

try {
    connection.connect(); // 连接服务器
    // 从服务器读取数据...
} catch (IOException e) {
    if (e instanceof SocketTimeoutException) {
        System.out.println("读取超时！");
    } else {
        e.printStackTrace();
    }
}

// 关闭连接
connection.disconnect();

如果你使用的是`Apache HttpClient`，可以在`CloseableHttpResponse`上设置连接管理器的超时：

HttpClient httpClient = HttpClients.createDefault();
HttpGet request = new HttpGet("http://example.com");
RequestConfig config = RequestConfig.custom().setConnectTimeout(5000).setSocketTimeout(5000).build();
CloseableHttpResponse response = httpClient.execute(request, config);

try {
    // 读取响应...
} finally {
    response.close();
}

对于`OkHttp`, 在`OkHttpClient.Builder`中添加`connectTimeout`和`readTimeout`:

OkHttpClient client = new OkHttpClient.Builder()
    .connectTimeout(5000, TimeUnit.MILLISECONDS)
    .readTimeout(5000, TimeUnit.MILLISECONDS)
    .build();

Response response = client.newCall(new Request.Builder()
    .url("http://example.com")
    .build())
    .execute();