Clojure中的套接字编程 [英] Socket programming in Clojure

问题描述

我是Clojure菜鸟，请多多包涵。我正在尝试编写一个简单的程序，以通过套接字发送命令并获得响应。我的代码是：

I'm a Clojure noob, so bear with me. I'm trying to write a simple program to send a command through a socket and get a response. My code is:

(def IPaddress "10.71.18.81")
(def port 1500)

(def socket (new Socket IPaddress port))
(print (clojure.string/join ["\nConnected to HSM: " (. socket isConnected)]))
(def in (DataInputStream. (BufferedInputStream. (. socket getInputStream))))
(def out (DataOutputStream. (BufferedOutputStream. (. socket getOutputStream))))
(def command "Some string")
(. out WriteUTF command)
(def response (. in readUTF))
(print (clojure.string/join ["Output from HSM: " response]))

错误为线程主中的异常java.lang.IllegalArgumentException：没有匹配的方法：writeUTF。我在理解Java互操作和访问对象方法等方面遇到困难。预先感谢。

The error is "Exception in thread "main" java.lang.IllegalArgumentException: No matching method: writeUTF". I'm having trouble understanding Java interop, and accessing object methods, etc. Thanks in advance.

编辑：如果有人感兴趣，我的最终工作代码包括在这里：

If anyone is interested, my final working code is included here:

(def IPaddress "10.71.18.81")
(def port 1500)

(def socket (Socket. IPaddress port))
(println "Connected:" (.isConnected socket))
(def in (DataInputStream. (BufferedInputStream. (.getInputStream socket))))
(def out (DataOutputStream. (BufferedOutputStream. (.getOutputStream socket))))
(def command "Some string")
(println "Input:" command)
(.writeUTF out command)
(.flush out)
(def response (.readUTF in))
(println "Output: " response)

推荐答案

Java是区分大小写的，因此应该为（。out writeUTF命令）。请注意，互操作的首选语法是（。writeUTF out命令），它等效于您的语句

Java is case sensite so it should be (. out writeUTF command). Note that the prefer syntax for interop is (.writeUTF out command) which is equivalent to your statement

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