Adding a string to a groovy map with a variable using interpolation

Question

Consider code:

 Map prJsonData = readJSON text: '{}'
 prJsonData.head = "release/${NEW_TAG}" as String
 prJsonData.title = "Release ${NEW_TAG}"
 writeJSON(file: 'create-pr.json', json: prJsonData, pretty: 4)

and output

{

    "head": "release/v1.0.2",

    "title":     {

        "bytes":         [
            82,
            101,
            97
        ],

        "strings":         [

            "Release ",

            ""

        ],

        "valueCount": 1,

        "values": ["v1.0.2"]

    }

}

Why is it that specifying as String changes the output such that interpolation works but without this the output appears to be some sort of complex type.

Answer 1

当您$在字符串内部使用替换其中的变量时，您实际上并没有得到一个 Java 字符串，而是一个GString. 你的 JSON 序列化器然后只是序列化它：

groovy:000> a=1
===> 1
groovy:000> s="$a"
===> 1
groovy:000> s.getClass()
===> class org.codehaus.groovy.runtime.GStringImpl
groovy:000> s.properties
===> [values:[1], class:class org.codehaus.groovy.runtime.GStringImpl, bytes:[49], strings:[, ], valueCount:1]

.toString()当消费者接受任何对象时，通常需要使用或转换为字符串，因此这会有所不同。根据您的 JSON-Library，为 GString 添加您自己的序列化程序可能是一个好主意，以防止出现这样的混淆。