要构造出该请求体：
{
"actId": "2020",
"buyNum": 0,
"perActLim": 0,
"perSkuLim": 0,
"skuId": "cpu",
"userId": "随机字符串",
"wmSkuNum": 20
}
使用jmeter中的随机字符串函数，没法加上双引号，所以可以写三个
${__RandomString(1,"",)}${__RandomString(3,abcdefghijk,)}${__RandomString(1,"",)}
效果如下：
标签：__,请求,双引号,RandomString,字符串,post,jmeter From： https://www.cnblogs.com/hu-kang/p/17031257.html