如何在groovy函数中使用将"Json string“从groovy变量传递到shell变量

import groovy.json.JsonSlurper

def transferJsonString(jsonString) {
    def json = new JsonSlurper().parseText(jsonString)
    // 对json对象进行处理或操作
    // ...
}

def jsonString = '{"key": "value"}'
transferJsonString(jsonString)

import java.lang.ProcessBuilder

def transferJsonString(jsonString) {
    def json = new JsonSlurper().parseText(jsonString)
    
    def cmd = ["sh", "-c", "export JSON_VAR='${jsonString}'; echo $JSON_VAR"]
    def processBuilder = new ProcessBuilder(cmd)
    def process = processBuilder.start()
    
    process.waitFor()
    
    def output = process.inputStream.text
    println "Shell变量的值为：${output}"
}