我正在使用 Netty（通过 Ning async HTTPlibrary http://www.ning.com/code/2010/03/introducing-nings-asynchronous-http-client-library/）通过 HTTP 检索文档。这会在控制台中产生大量调试输出，如下针对单个文档请求所列。
有人知道如何关闭此功能吗？我真的不需要看到这个输出。
我是从 Scala 打来的，如果这有什么区别的话。
15:07:14.273 [run-main] DEBUG c.n.h.c.p.n.NettyAsyncHttpProvider -
Non cached request
DefaultHttpRequest(chunked: false)
GET /api/search.json?q=foo HTTP/1.1
Host: www.documentcloud.org
Connection: keep-alive
Accept: */*
User-Agent: NING/1.0
using Channel
[id: 0x2839ca40]
15:07:14.930 [New I/O client worker #1-1] DEBUG c.n.h.c.p.n.NettyAsyncHttpProvider -
Request DefaultHttpRequest(chunked: false)
GET /api/search.json?q=foo HTTP/1.1
Host: www.documentcloud.org
Connection: keep-alive
Accept: */*
User-Agent: NING/1.0
Response DefaultHttpResponse(chunked: true)
HTTP/1.1 200 OK
Content-Type: application/json; charset=utf-8
Content-Length: 10477
Connection: keep-alive
Vary: Accept-Encoding
Status: 200
X-Powered-By: Phusion Passenger (mod_rails/mod_rack) 3.0.13
ETag: "4f8f766d639dd84d014dfee3abb45de2"
X-Runtime: 611
Cache-Control: private, max-age=0, must-revalidate
Server: nginx/1.2.1 + Phusion Passenger 3.0.13 (mod_rails/mod_rack)
15:07:14.941 [New I/O client worker #1-1] DEBUG c.n.h.c.p.netty.NettyConnectionsPool - Adding uri: http://www.documentcloud.org:80 for channel [id: 0x2839ca40, /10.5.165.61:56133 => www.documentcloud.org/75.101.159.206:80]
15:07:16.921 [New I/O client worker #1-1] DEBUG c.n.h.c.p.n.NettyAsyncHttpProvider - Channel Closed: [id: 0x2839ca40, /10.5.165.61:56133 :> www.documentcloud.org/75.101.159.206:80] with attachment com.ning.http.client.providers.netty.NettyAsyncHttpProvider$DiscardEvent@63182c3d
15:08:13.924 [Timer-0] DEBUG c.n.h.c.p.netty.NettyConnectionsPool - Entry count for : http://www.documentcloud.org:80 : 0
从缩写的包名称来看，在我看来，slf4j/logback 正在用于此处的日志记录。
在这种情况下，只需尝试在类路径中包含 logback.xml 配置文件。类似的东西
<?xml version="1.0" encoding="UTF-8" ?>
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
</encoder>
</appender>
<root level="INFO">
<appender-ref ref="STDOUT"/>
</root>
<logger name="com.ning.http.client" level="WARN"/>
</configuration>
上面的 xml 会导致 com.ning.http.client （及向下）下的任何内容仅忽略警告，并且输出更糟，该输出将流式传输到 system.out。其他任何内容都会省略 INFO+
您可以在此处找到有关配置 logback 的更多信息：http://logback.qos.ch/manual/configuration.html http://logback.qos.ch/manual/configuration.html
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