Jmeter（七）关联之JSON提取器

如果返回的数据是JSON格式的，我们可以用JSON提取器来提取需要的字段，这样更简单一点

• Variable names：保存的变量名，后面使用${Variable names}引用

• JSON Path  expressions：调试通过的json path表达式

• Match Numbers：匹配数字（0代表随机，1代表第一个，-1代表所有）

• Default Values：找不到时默认值，一般设置为NOT FOUND

• Compute concatenation var(suffix_ALL)：是否统计所有，即将匹配到的所有值保存，名为“变量名_ALL”

示例：

请求URL：https://fe-api.zhaopin.com/c/i/sou?pageSize=60&cityId=765&workExperience=-1&education=-1&companyType=-1&employmentType=-1&jobWelfareTag=-1&kw=%E8%BD%AF%E4%BB%B6%E6%B5%8B%E8%AF%95&kt=3

返回的数据格式：

{"code":200,"data":{"numFound":5679,"numTotal":1000,"results":[{"applyType":"1","updateDate":"2019-02-18 08:59:47","refreshMulscore":"0.0","g_sort":"sort-ps-score-ranking-keyword","endDate":"2019-03-20 08:59:47","city":{"display":"深圳-南山区","items":[{"code":"765","name":"深圳"},{"code":"2039","name":"南山区"}]},"showLicence":0,"saleType":100,"positionURL":"https://jobs.zhaopin.com/CC120837247J00254874105.htm","g_weight":101,"industry":"160000,160400, 300100, 160200","welfare":["五险一金","周末双休","绩效奖金","全勤奖","带薪年假"],"salary":"8K-16K","SOU_POSITION_ID":"CC120837247J00254874105","duplicated":0,"geo":{"lon":"113.937987","lat":"22.523392"},"score":20.695484,"number":"CC120837247J00254874105","vipLevel":1003,"recruitCount":1,"workingExp":{"code":"510","name":"5-10年"},"companyScore":0,"tagIntHighend":0,"company":{"number":"CZ120837240","size":{"code":"3","name":"100-499人"},"name":"深圳市利谱信息技术有限公司","type":{"code":"5","name":"民营"},"url":"https://company.zhaopin.com/CZ120837240.htm"},"seo":"0","jobType":{"display":"IT质量管理/测试/配置管理,软件测试","items":[{"code":"160400","name":"IT质量管理/测试/配置管理"},{"code":"695","name":"软件测试"}]},"g_query":"query-ps-score-1","resumeCount":46,"createDate":"2019-02-18 08:59:47","jobName":"中高级测试工程师","manualScore":"0.0","eduLevel":{"code":"4","name":"本科"},"companyLogo":"","futureJob":false,"emplType":"全职","g_source":"source-solr-position","SOU_POSITION_SOURCE_TYPE":1,"recentAndTotal":{"applyTotal":"46","exposureTotal":"2350","clickTotal":"231","exposureRecent":"0","clickRecent":"0","applyRecent":"0"},"tags":[],"businessArea":"科技园","positionLabel":"{\"qualifications\":null,\"chatWindow\":20,\"jobLight\":[\"五险一金\",\"周末双休\",\"绩效奖金\",\"全勤奖\",\"带薪年假\",\"弹性工作\",\"节日福利\",\"员工旅游\"],\"role\":null,\"companyTag\":null,\"level\":null,\"refreshLevel\":0,\"skill\":[\"应用底层 \",\"熟悉网路知识\",\"软件功能测试\",\"网络设备测试\"]}","expandCount":0,"jobTag":{"searchTag":"应用底层 ,熟悉网路知识,软件功能测试,网络设备测试,五险一金,周末双休,绩效奖金,全勤奖,带薪年假,弹性工作,节日福利,员工旅游"},"feedbackRation":0.4557,"interview":0,"selected":false,"applied":false,"collected":false,"isShow":false,"timeState":"最新","rate":""},{"applyType":"1","updateDate":"2019-02-18 14:02:38","refreshMulscore":"0.0","g_sort":"sort-ps-score-ranking-keyword","endDate":"2019-03-13 14:55:38","city":{"display":"深圳","items":[{"code":"765","name":"深圳"}]},"showLicence":0,"saleType":100,"positionURL":"https://jobs.zhaopin.com/CC143316927J00059803005.htm","g_weight":101,"industry":"160400,160000,180000","welfare":["五险一金","员工旅游","加班补助","交通补助","餐补"],"salary":"6K-10K","SOU_POSITION_ID":"CC143316927J00059803005","duplicated":0,"geo":{"lon":"114.070226","lat":"22.556923"},"score":20.717499,"number":"CC143316927J00059803005","vipLevel":1003,"recruitCount":3,"workingExp":{"code":"103","name":"1-3年"},"companyScore":0,"tagIntHighend":0,"company":{"number":"CZ143316920","size":{"code":"5","name":"1000-9999人"},"name":"深圳市赢时胜信息技术股份有限公司","type":{"code":"5","name":"民营"},"url":"https://company.zhaopin.com/CZ143316920.htm"},"seo":"0","jobType":{"display":"IT质量管理/测试/配置管理,软件测试","items":[{"code":"160400","name":"IT质量管理/测试/配置管理"},{"code":"695","name":"软件测试"}]},"g_query":"query-ps-score-1","resumeCount":68,"createDate":"2019-02-11 14:55:38","jobName":"测试工程师","manualScore":"0.0","eduLevel":{"code":"4","name":"本科"},"companyLogo":"","futureJob":false,"emplType":"全职","g_source":"source-solr-position","SOU_POSITION_SOURCE_TYPE":1,"recentAndTotal":{"applyTotal":"68","exposureTotal":"3698","clickTotal":"218","exposureRecent":"0","clickRecent":"0","applyRecent":"0"},"tags":[],"businessArea":"莲花一村","positionLabel":"{\"qualifications\":null,\"chatWindow\":10,\"jobLight\":[\"五险一金\",\"员工旅游\",\"加班补助\",\"交通补助\",\"餐补\",\"通讯补助\"],\"role\":null,\"companyTag\":null,\"level\":null,\"refreshLevel\":1,\"skill\":null}","expandCount":0,"jobTag":{"searchTag":"五险一金,员工旅游,加班补助,交通补助,餐补,通讯补助"},"feedbackRation":0.1269,"interview":0,"selected":false,"applied":false,"collected":false,"isShow":false,"timeState":"最新","rate":""}],"debugInfo":null,"loginfo":null,"facets":[],"extend":"","method":"","taskId":"0a58fc153a9f4fcc9ccefd399e079156","scores":null,"elapsed":["gateway 内部执行耗时117毫秒","gateway 调用总耗时0毫秒","psapi 共耗时135毫秒"],"time":"2019-02-18 18:34:18"}}

现在我们来提取职位的positionURL字段：

1、在查看结果树中通过JSON Path Tester来调试json path

2、添加JSON提取器，设置正确的参数，获取第一个positionURL

输出结果：

3、获取所有的positionURL

输出结果：

4、把所有的positionURL放到一个字段中

输出结果：

5、一次性提取多个字段，比如我们要提取第一个职位的jobName;salary;positionURL三个字段

输出结果：

Json Path表达式：

JsonPath	描述
$	根节点
@	当前节点
.or[]	子节点
..	选择所有符合条件的节点
*	所有节点
[]	迭代器标示，如数组下标
[,]	支持迭代器中做多选
[start:end:step]	数组切片运算符
?()	支持过滤操作
()	支持表达式计算