使用Groovy创建json对象并将json追加到现有json文件中。

Question

我对Groovy (和json)还很陌生，并且很有可能获得预期的解决方案。但却无法达到目的。我要做的是解析一个现有的json文件，然后添加/追加其他条目，如下例所示：

原始Json文件：

{
    "stack-1": {
        "name": "demo",
        "createdAt": "11:00 PM",
        "owner": "sarva",
        "dbName": "DB"
    }
}

来自Json的新Json内容：

{
    "stack-2": {
        "name": "demo-2",
        "createdAt": "15:00 PM",
        "owner": "bhowma",
        "dbName": "DB2"
    }
}

合并后的预期Json输出：

{
    "stack-1": {
        "name": "demo",
        "createdAt": "11:00 PM",
        "owner": "sarva",
        "dbName": "DB"
    },
    "stack-2": {
        "name": "demo-2",
        "createdAt": "15:00 PM",
        "owner": "Bhowma",
        "dbName": "DB2"
    }
}

在下面的代码片段中，我尝试了许多变体，但仍然没有为我的预期输出获得正确的格式。

import groovy.json.*
def number = 2
def name = "demo-2"
def createdAt = "15:00 PM"
def owner = "bhowma"
def db_name = "DB2"

// here I am loading an old json file
def jsonSlurper = new JsonSlurper()
def json = jsonSlurper.parse(new File('/tmp/sarva.json'))

// Here I am building a new JSON with the above parameters.
def builder = new JsonBuilder()
def root = builder "stack-$number": [name: name, createdAt: createdAt, owner: owner, dbName: db_name]
def newJson = jsonSlurper.parseText(builder.toPrettyString())
println(json.getClass())
println(newJson.getClass())
print json
print builder

目前，我可以从json & builder.toPrettyString()及其类中看到下面的o/p。但我无法按计划合并它们。我希望这个合并可以用于我传递的尽可能多的json对象。

当前输出显示在下面

class groovy.json.internal.LazyMap
class groovy.json.internal.LazyMap
[stack-1:[createdAt:11:00 PM, dbName:DB, name:demo, owner:sarva]]
{"stack-2":{"name":"demo-2","createdAt":"15:00 PM","owner":"Bhowma","dbName":"DB-2"}}

任何帮助分类这将是非常感谢的。

Answer 1

忽略您的示例是不完整的，您已经将原始JSON解析为Map，所以只需将新元素添加到映射中即可。

// Here I am building a new Map with the above parameters.
json += ["stack-$number": [name: name, createdAt: createdAt, owner: owner, dbName: db_name]]

然后从这张地图上打印出新的json

println new JsonBuilder(json).toPrettyString()