如何批量替换json文件中的值

有一json文件，里面有大量如下内容

[{"feeId":"2","ifvalid":1,"title":"Long_Day_Journey","intro":"地球","intro1":"","intro2":"4","begTime":"","endTime":"","datasort":39,"paymentId":"1,2"},

怎么批量的修改feeId和paymentId的值，比如说将"feeId":"2"改为"feeId":"1"
和将"paymentId":"1,2"改为"paymentId":"1"。用sed命令方便吗？

几种解决方案：
1、用replace 替换
2、把json转成map 或者bean 再把要改的值改了

num="[{"feeId":"2","ifvalid":1,"title":"Long_Day_Journey","intro":"地球","intro1":"","intro2":"4","begTime":"","endTime":"","datasort":39,"paymentId":"1,2"}"
echo $num |sed 's/feeId:2/feeId:1/g'