Question

list<map<string object>>怎么遍历看是否存在某一项,不存在则添加

mybatis查出的数据是这样的：
{
"entity": [
{
"channelRatio": 20,
"channelnum": "01",
"documentsum": 1
},
{
"channelRatio": 40,
"channelnum": "02",
"documentsum": 2
},
{
"channelRatio": 20,
"channelnum": "04",
"documentsum": 1
},
{
"channelRatio": 20,
"channelnum": "05",
"documentsum": 1
}
],
"errorCode": "0"
}
用的是list<map<string object>>接的，如果渠道channelnum=03没有 怎么在service层加到这个list<map<string object>>里，加上 "channelRatio":0, "channelnum": "03", "documentsum": 0

Answer 1

既然是mybatis，为何不在SQL查询中过滤呢

如果一定要枚举，先定义判断变量，逐个枚举、发现就改变判断变量的值 。。。。。

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