本文包含的json格式：{"key1":{"key2":[{"key3","value3"},{}]}}，[{},{}]；
题目，如上图；
采用beanshell postprocessor结合fastjson库的方法；
先配置环境，我用的是jmeter 5.11,fastjson用到的1.2.68的版本；需要将fastjson.jar包放到jmeter的安装路径的libext库中，并且在jmeter的Test Plan中引用这个jar包；
BeanShell Sampler构造json响应结果；代码如下；
return "{"Status Code":200,"ret":{"id":"id","imageList":[{"originUrl":"图片链接1","originWidth":200,"originHeight":300},{"originUrl":"图片链接2","originWidth":300,"originHeight":300}]}}"
BeanShell PostProcess代码如下；
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
String rs = prev.getResponseDataAsString();//获取响应结果
JSONObject aa = JSON.parseObject(rs);//整个响应结果作为JSON对象；
JSONObject ret=aa.getJSONObject("ret");//获取某一部分对象。即，json串中{}的内容；
JSONArray imageList=ret.getJSONArray("imageList");//获取列表。即json串中的[]的内容；
log.info("结果："+imageList); //不能写成log.info(imageList);这样会报错；需要加字符串；
boolean result;
for(int i=0;i<imageList.size();i++){
String x=imageList.getJSONObject(i).getString("originHeight");
String y=imageList.getJSONObject(i).getString("originWidth");
log.info(x+" "+y);//查看结果；
if(!(x.equals("300")) || !(y.equals("200"))){//注意整数需要使用"括起来，作为字符串；
log.info("第"+(i+1)+"项服务器返回结果不正确");
result=true;
}
}
if(!result){
log.info("服务器返回结果正确");
}
com.alibaba的fastjson简介
fastjson是一个Java语言编写的高性能功能完善的JSON库。
常用api；
1.String JSON.toJSONString(Object object) //将对象序列化成json字符串；//我认为String代表类型；可以使用String类型的变量去接收这个值；
2.JSONObject JSON.parseObject(String text) //将json字符串反序列化成JSON对象；
3.JSONArray JSONObject.getJSONArray(String key) //根据key得到json中的json数组；
4.JSONObject JSONArray.getJSONObject(int index) //根据下标拿到json数组的json对象；
JSONObject JSONObject.getJSONObject(String key);
5.String JSONObject.getString(String key) //根据key拿到json的字符串值；
6.int JSONObject.getIntValue(String key) //根据key拿到json的int值；
7.boolean JSONObject.getBooleanValue(String key) //根据key拿到json的boolean值；
参考：https://www.cnblogs.com/qiaoyeye/p/7730288.html
下面继续来提取响应json串的DEVICE_ID参数值；
响应结果如下图；//因为中途遇到报错，各种百度，尝试各种方法，将fastjson放置在了jmeter目录的lib下了（D:apache-jmeter-5.1.1libfastjson-1.2.68.jar），最终发现是Object单词写错了；哎，都是粗心的错；
{
"data": {
"records": [
{
"DEVICE_TYPE": 194,
"DEVICE_STATUS": 0,
"ORG_NAME": "**省",
"LONGITUDE": "0.000000",
"DEVICE_NAME": "测试1",
"DEVICE_ADDR": "",
"DEVICE_ID_INT": "13",
"HAVE_VIDEO": "true",
"OWNER": "-1",
"ORIGINAL_DEVICE_ID": "44000000011325******",
"PLATFORM_ID": "44000000052005******",
"ORG_CODE": "44",
"TYPE": "1",
"DEVICE_ID": "44000000011325******",
"LATITUDE": "0.000000"
},
{
"DEVICE_TYPE": 194,
"DEVICE_STATUS": 0,
"LONGITUDE": "0.000000",
"DEVICE_NAME": "测试2",
"DEVICE_ADDR": "",
"DEVICE_ID_INT": "10",
"HAVE_VIDEO": "true",
"OWNER": "1",
"ORIGINAL_DEVICE_ID": "44010000001320******",
"PLATFORM_ID": "44000000052005******",
"ORG_CODE": "4401",
"TYPE": "1",
"DEVICE_ID": "440100000013200******",
"LATITUDE": "0.000000"
},
{
"DEVICE_TYPE": 194,
"DEVICE_STATUS": 0,
"LONGITUDE": "0.000000",
"DEVICE_NAME": "测试3",
"DEVICE_ADDR": "",
"DEVICE_ID_INT": "11",
"HAVE_VIDEO": "true",
"OWNER": "1",
"ORIGINAL_DEVICE_ID": "44010000001320******",
"PLATFORM_ID": "44000000052005******",
"ORG_CODE": "4401",
"TYPE": "1",
"DEVICE_ID": "44010000001320******",
"LATITUDE": "0.000000"
}
],
"count": 3,
"usetime": 0
}
}
方式一、BeanShell Sampler构造响应结果为json的请求；使用BeanShell PostProcessor提取结果；
return "{"data": {"records": [{"DEVICE_TYPE": 194,"DEVICE_STATUS": 0,"ORG_NAME": "**省","LONGITUDE": "0.000000","DEVICE_NAME": "测试1","DEVICE_ADDR": "","DEVICE_ID_INT": "13","HAVE_VIDEO": "true","OWNER": "-1","ORIGINAL_DEVICE_ID": "44000000011325******","PLATFORM_ID": "44000000052005******","ORG_CODE": "44","TYPE": "1","DEVICE_ID": "44000000011325******","LATITUDE": "0.000000"}, {"DEVICE_TYPE": 194,"DEVICE_STATUS": 0,"LONGITUDE": "0.000000","DEVICE_NAME": "测试2","DEVICE_ADDR": "","DEVICE_ID_INT": "10","HAVE_VIDEO": "true","OWNER": "1","ORIGINAL_DEVICE_ID": "44010000001320******","PLATFORM_ID": "44000000052005******","ORG_CODE": "4401","TYPE": "1","DEVICE_ID": "440100000013200******","LATITUDE": "0.000000"}, {"DEVICE_TYPE": 194,"DEVICE_STATUS": 0,"LONGITUDE": "0.000000","DEVICE_NAME": "测试3","DEVICE_ADDR": "","DEVICE_ID_INT": "11","HAVE_VIDEO": "true","OWNER": "1","ORIGINAL_DEVICE_ID": "44010000001320******","PLATFORM_ID": "44000000052005******","ORG_CODE": "4401","TYPE": "1","DEVICE_ID": "44010000001320******","LATITUDE": "0.000000"}],"count": 3,"usetime": 0}}"
//从返回的json消息中提取所有的设备ID号（DEVICE_ID）；
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
String text=prev.getResponseDataAsString();
JSONObject a=JSON.parseObject(text);//将JSON字符串反序列化成JSON对象；
log.info("json结果"+a);
JSONObject b=a.getJSONObject("data");//根据data得到json中json对象；
JSONArray c=b.getJSONArray("records");//根据records得到json中的json数组；
for(int i=0;i<c.size();i++){
JSONObject d=c.getJSONObject(i);//根据下标拿到json数组的json对象；
String Device_id=d.getString("DEVICE_ID");//根据DEVICE_ID拿到json的字符串值；
log.info(Device_id);
}
方式二、BeanShell Sampler一步到位；察看结果树中无json响应结果；
String text="{"data": {"records": [{"DEVICE_TYPE": 194,"DEVICE_STATUS": 0,"ORG_NAME": "**省","LONGITUDE": "0.000000","DEVICE_NAME": "测试1","DEVICE_ADDR": "","DEVICE_ID_INT": "13","HAVE_VIDEO": "true","OWNER": "-1","ORIGINAL_DEVICE_ID": "44000000011325******","PLATFORM_ID": "44000000052005******","ORG_CODE": "44","TYPE": "1","DEVICE_ID": "44000000011325******","LATITUDE": "0.000000"}, {"DEVICE_TYPE": 194,"DEVICE_STATUS": 0,"LONGITUDE": "0.000000","DEVICE_NAME": "测试2","DEVICE_ADDR": "","DEVICE_ID_INT": "10","HAVE_VIDEO": "true","OWNER": "1","ORIGINAL_DEVICE_ID": "44010000001320******","PLATFORM_ID": "44000000052005******","ORG_CODE": "4401","TYPE": "1","DEVICE_ID": "440100000013200******","LATITUDE": "0.000000"}, {"DEVICE_TYPE": 194,"DEVICE_STATUS": 0,"LONGITUDE": "0.000000","DEVICE_NAME": "测试3","DEVICE_ADDR": "","DEVICE_ID_INT": "11","HAVE_VIDEO": "true","OWNER": "1","ORIGINAL_DEVICE_ID": "44010000001320******","PLATFORM_ID": "44000000052005******","ORG_CODE": "4401","TYPE": "1","DEVICE_ID": "44010000001320******","LATITUDE": "0.000000"}],"count": 3,"usetime": 0}}";
//从返回的json消息中提取所有的设备ID号（DEVICE_ID）；
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
//String text=prev.getResponseDataAsString();
JSONObject a=JSON.parseObject(text);//将JSON字符串反序列化成JSON对象；
log.info("json结果"+a);
JSONObject b=a.getJSONObject("data");//根据data得到json中json对象；
JSONArray c=b.getJSONArray("records");//根据records得到json中的json数组；
for(int i=0;i<c.size();i++){
JSONObject d=c.getJSONObject(i);//根据下标拿到json数组的json对象；
String Device_id=d.getString("DEVICE_ID");//根据DEVICE_ID拿到json的字符串值；
log.info(Device_id);
}
import com.alibaba.fastjson.*; String v=prev.getResponseDataAsString(); JSONArray ja=JSON.parseArray(v); System.out.println(ja.size());