带有插值器 S 的 Scala 字符串格式不起作用 [英] scala string formatting with interpolator S not working

问题描述

我是 scala 的新手，正在尝试进行一些字符串格式化.

I am new to scala and trying to do some string formatting.

val mAPRegisterResponseMessage = s"{\" 'type' \": \"ap_register_response\",  
 \"message_id\": 02,\"register_status\": $registerStatus,\"host_name_type\": 
 $host_name_type, \"host_name\": $host_name, \"port_num\":$port_num }"

如果我删除开头的 s，则形成字符串文字，但显然不正确.但是，在开始添加 s 后，第二个反斜杠出现 unclosed character literal 错误.我究竟做错了什么?任何线索都会有所帮助.

If I remove the s in the beginning then the string literal is formed but obviously not correctly. However after adding s at the start, I get an error as unclosed character literal for the second backslash. What am I doing wrong? Any clues will help.

推荐答案

可以使用三引号:

s""" {"foo" : 2, "bar": $registerStatus} """

Scala 控制台:

scala> val registerStatus = "new"
registerStatus: String = new

scala> s""" {"foo" : 2, "bar": $registerStatus} """
res0: String = " {"foo" : 2, "bar": new} "

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