我是Groovy的新手,并且正在使用Groovy编写的Smartthing Hub的设备处理程序。我在解析字符串时遇到问题。
def parseDescriptionAsMap(description) {
println "description: '${description}"
def test = description.split(",")
println "test: '${test}"
test.inject([:]) { map, param ->
def nameAndValue = param.split(":")
println "nameAndValue: ${nameAndValue}"
if(map)
{
println "map is NOT NULL"
map.put(nameAndValue[0].trim(),nameAndValue[1].trim())
}
else
{
println "map is NULL!"
}
}
}
输出:
description: 'index:17, mac:AAA, ip:BBB, port:0058, requestId:ce6598b2-fe8b-463d-bdf3-01ec35055f7a, tempImageKey:ba416127-14e3-4c7b-8f1f-5b4d633102e5
test: '[index:17, mac:AAA, ip:BBB, port:0058, requestId:ce6598b2-fe8b-463d-bdf3-01ec35055f7a, tempImageKey:ba416127-14e3-4c7b-8f1f-5b4d633102e5]
nameAndValue: [index, 17]
nameAndValue: [ mac, AAA]
map is NULL!
nameAndValue: [ ip, BBB]
map is NULL!
map is NULL!
nameAndValue: [ port, 0058]
nameAndValue: [ requestId, ce6598b2-fe8b-463d-bdf3-01ec35055f7a]
两个问题:
1.为什么变量map,null?
2.为什么函数不打印nameAndValue->'tempImageKey'信息?
答案 0 :(得分:2)
if(map)
检查它是否为null或为空......在这种情况下它不会为空(只要你遵循#2)您需要从map
关闭返回inject
,以便汇总。
test.inject([:]) { map, param ->
def nameAndValue = param.split(":")
println "nameAndValue: ${nameAndValue}"
map.put(nameAndValue[0].trim(),nameAndValue[1].trim())
map
}
您尝试的更简单的版本是:
description.split(',')*.trim()*.tokenize(':').collectEntries()