[JMeter获取复杂的JSON串中的参数的值]
大家好,这篇博文中主要是介绍怎么用JMeter的BeanShell去获取复杂的JSON串中的某个参数的值,这将
便于我们用JMeter做出更完美的自动化测试;
首先有这样一个json串:
{
"code": 0,
"data": {
"2018720-0317": [{
"cpurl": "https://cdn.i5sesol.com/isesolImall/",
"cxmc": "",
"jhsl": 1,
"cxwj": "",
"xsddbh": "111807200000645200",
***** "gybh": "TJTYCPGYBH",
********** "gybzbh": "20171225000001",
*********** "cpcz": ",,,",
************ "pgdrwbh": "2018720-0317-0366",
************* "cpmc": "星座+签名定制狮子座",
************** "bgsl": 0,
*************** "xlh": "2018052401",
**************** "gygxbh": "TJZDXDGX",
***************** "cpbh": "1532047578068",
****************** "cxList": [],
******************* "r1": "null"
******************** }],
********************* "2018720-0318": [{
********************* "cpurl": "https://cdn.i5sesol.com/isesolImall/",
********************* "cxmc": "",
********************* "jhsl": 1,
********************* "cxwj": "",
********************* "xsddbh": "111807200000645300",
********************* "gybh": "TJTYCPGYBH",
********************* "gybzbh": "20171225000001",
********************* "cpcz": ",,,",
********************* "pgdrwbh": "2018720-0318-0367",
********************* "cpmc": "星座+签名定制狮子座",
********************* "bgsl": 0,
********************* "xlh": "2018052401",
********************* "gygxbh": "TJZDXDGX",
********************* "cpbh": "1532048096286",
********************* "cxList": [],
********************* "r1": "null"
********************* }]
********************* },
********************* "message": "成功"
********************* }
如上图中,画红框的部分,参数xsddbh(111807200000645300)的值可知,在下一个接口请求中,需要用到上图中的参数
cpbh(1532048096286)的值,然而参数xsddbh在json串中的每个list都有,那么这时候怎么办呢?在这里我将用alibaba.fastjson
这个包进行讲解:
一、下载Alibaba Fastjson Jar包,放在自己能够标识的目录,并在测试计划中引用该jar包,如下图所示:
二、在测试计划中添加线程组,并在线程组中添加BeanShell PreProcessor,如下图所示:
三、在BeanShell PreProcessor中引入json解析相关jar包,这里用到的jar包如下图所示:
import java.util.Collection;
import java.util.Iterator;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
四、将本文开头的json串放到BeanShell PreProcesso,当然需要转移成String类型的,同时并解析该json串
4.1、这里方便大家使用我直接将该String串写出来
String tr = "{"code": 0,"data": {"2018720-0317":[{"r2": "null","cpurl": "https://cdn.i5sesol.com","cxmc":"","jhsl": 1,"cxwj": "","xsddbh": "111807200000645200","gybh": "TJTYCPGYBH","gybzbh": "20171225000001","cpcz": ",,,","pgdrwbh": "2018720-0317-0366","cpmc": "星座+签名定制狮子座","bgsl": 0,"xlh":"2018052401","gygxbh": "TJZDXDGX","cpbh": "1532047578068","cxList": [],"r1": "null"}],"2018720-0318": [{"r2": "null", "cpurl": "https://cdn.i5sesol.com/isesolImall","cxmc": "","jhsl": 1,"cxwj": "","xsddbh": "111807200000645300","gybh": "TJTYCPGYBH","gybzbh": "20171225000001","cpcz": ",,,","pgdrwbh": "2018720-0318-0367","cpmc": "星座+签名定制狮子座","bgsl": 0,"xlh": "2018052401","gygxbh": "TJZDXDGX","cpbh": "1532048096286","cxList": [],"r1": "null"}]},"message": "成功"}";
在BeanShell PreProcessor中显示如下图所示:
4.2、将上面的Sting字符串转换成json串,并获取其中data的
//转换成JSON串
JSONObject json = JSONObject.parseObject(tr);
//获取data的json串;
JSONObject data = json.getJSONObject("data");
4.3、用迭代器去获取data中的元素,并循环
while(it.hasNext()){
Object key = it.next();
String value = JSONObject.toJSONString(key);
JSONArray array = JSONArray.parseArray(value);
System.out.println(value);
for(int i = 0; i < array.size(); i++) {//循环json数组
JSONObject ob = (JSONObject) array.get(i);//得到json对象
System.out.println(ob);
String xsddbh= ob.getString("xsddbh");//获取json对象中列名为xsddbh的值
if(xsddbh.equals("111807200000645300")) {
String cpbh = ob.getString("cpbh");
System.out.println("cpbh"+cpbh);
}
}
}
ps:将上述代码可以在eclipse中调试一下,如果直接粘贴至BeanShell PreProcesso中,可能会有字符串空格问题
4.4、最终解析并获取到cpbh的值在BeanShell PreProcesso中显示如下图所示:
五、执行脚本,在控制台中查看cpbh的值,如下图所示:
从图中可以看到结果被成功取出
六、如果再希望cpbh这个参数在下面被取到,那么我们需要需要用到jmeter的函数vars.put
vars.put("cpbh",cpbh);
七、查看该参数是否能够传递给下一个http请求,如下图所示:
7.1、添加一个http请求,并引用该变量,如下图所示:
7.2、执行脚本,查看变量值是否被引用,如下图所示:
至此,jmeter在做自动化是引用比较复杂的变量解析完毕。
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变化往往都是来的悄无声息,成长不是一蹴而就