如何用Groovy批量替换deploy.json中版本值1.0.2为2.6.5？

请问是否有简便方法通过Groovy脚本，将deploy.json文件中所有版本值从"1.0.2"替换为"2.6.5"？文件内容如下：

{ "versions": [ { "version": "1.0.2", "conf": "replian" }, { "version": "1.0.2", "conf": "hp" }, { "version": "1.0.2", "conf": "shutoff" }, { "version": "1.0.2", "conf": "spark" } ] }

我尝试了以下代码，但仅替换了第一个版本值：

import groovy.json.JsonBuilder 
import groovy.json.JsonSlurper 
def content = ''' { "versions": [ { "version": "1.0.2", "conf": "replian" }, { "version": "1.0.2", "conf": "hp" }, { "version": "1.0.2", "conf": "shutoff" }, { "version": "1.0.2", "conf": "spark" } ] }''' 
def slurped = new JsonSlurper().parseText(content) 
def builder = new JsonBuilder(slurped) 
builder.content.versions.find{it.version}.version = "2.6.5" 
println(builder.toPrettyString()) 

问题现象：仅第一个conf对应的版本被替换，例如：

{ "version": "2.6.5", "conf": "replian" }, { "version": "1.0.2", "conf": "hp" }, { "version": "1.0.2", "conf": "shutoff" }, { "version": "1.0.2", "conf": "spark" }

嘿，这个问题很常见！你代码里的find方法是关键问题——它只会返回数组中第一个匹配条件的元素，所以自然只修改了第一个对象的版本值。要批量替换所有符合条件的元素，我们需要遍历整个versions数组。

修正后的两种简洁实现 #

方式1：直接遍历修改原对象（最直观）

用each方法遍历数组里的每一项，检查版本值并替换：

import groovy.json.JsonBuilder 
import groovy.json.JsonSlurper 

// 如果是从文件读取，替换成 def content = new File('deploy.json').text
def content = ''' { "versions": [ { "version": "1.0.2", "conf": "replian" }, { "version": "1.0.2", "conf": "hp" }, { "version": "1.0.2", "conf": "shutoff" }, { "version": "1.0.2", "conf": "spark" } ] }''' 

def slurped = new JsonSlurper().parseText(content) 

// 遍历所有版本项，替换指定版本
slurped.versions.each { item ->
    if (item.version == "1.0.2") {
        item.version = "2.6.5"
    }
}

def builder = new JsonBuilder(slurped) 
println(builder.toPrettyString())

方式2：生成新数组（不修改原解析对象）

如果你希望保留原解析后的对象不变，可以用collect生成一个新的数组：

import groovy.json.JsonBuilder 
import groovy.json.JsonSlurper 

def content = ''' { "versions": [ { "version": "1.0.2", "conf": "replian" }, { "version": "1.0.2", "conf": "hp" }, { "version": "1.0.2", "conf": "shutoff" }, { "version": "1.0.2", "conf": "spark" } ] }''' 

def slurped = new JsonSlurper().parseText(content) 

// 生成更新后的版本数组
def updatedVersions = slurped.versions.collect { item ->
    // 匹配到目标版本就替换，否则保留原对象
    item.version == "1.0.2" ? item + [version: "2.6.5"] : item
}
// 替换原数组
slurped.versions = updatedVersions

def builder = new JsonBuilder(slurped) 
println(builder.toPrettyString())

运行效果 #

两种方法都会输出所有版本值被替换后的JSON：

{
    "versions": [
        {
            "version": "2.6.5",
            "conf": "replian"
        },
        {
            "version": "2.6.5",
            "conf": "hp"
        },
        {
            "version": "2.6.5",
            "conf": "shutoff"
        },
        {
            "version": "2.6.5",
            "conf": "spark"
        }
    ]
}

小提示 #

如果你的JSON是本地文件，只需要把content变量替换成文件读取代码即可：

def content = new File('deploy.json').text

内容的提问来源于stack exchange，提问作者itgeek