groovy 把json串转化成对象

今天有个任务，要把redis中缓存的json串读取出来并放到对象中，便于后续使用对象。相关代码如下：

json串

{
     "GDS_ID":"123","GDS_NAME":"手机" }

对象定义

class TGdsInfo {
        def gdsId
        def gdsName
}

完整代码

import groovy.json.JsonSlurper

/** * Created by fangyunfeng on 2015/9/12. */

def gdsInfo = ''' { "GDS_ID":"123","GDS_NAME":"手机" } '''


class TGdsInfo {
        def gdsId
        def gdsName
}

/** * json串字段名到对象属性名映射函数 * @param s * @return */
def camle(String s){
        return s.toLowerCase()
                .replaceAll("_[A-Za-z]"){String it->it.toupperCase()}
                .replace('_','')
}

def gdsJson = new JsonSlurper().parseText(gdsInfo)
def gdsObj = new TGdsInfo()
gdsJson.each {Map.Entry entry -> String propName = camle(entry.key)
        if(gdsObj.MetaClass.hasProperty(gdsObj,propName)){
                gdsObj[propName] = entry.value } } println("gdsId:"+gdsObj.gdsId) println("gdsName:"+gdsObj.gdsName)

输出结果

gdsId:123
gdsName:手机

Process finished with exit code 0

注意，这里json串中的字段名跟对象中的属性名并不一致，所以需要通过camel函数做一下映射。