JMeter后置处理器之JSON提取器
1、添加json提取器
【线程组】——>【添加】——>【后置处理器】
2、JSON提取器面板介绍
- Main sampleand sub-samples：应用于主sample及子sample
- Main sample only：默认的是这个，应用于主sample
- Sub-samples only：应用于子sample
- JMeterVariableName to use：应用于变量命名的内容
- Variable names : 名称
- JSONPath Expression：JSON表达式
- Match Numbers：0随机；n取第几个匹配值；-1匹配所有，后续引用用 变量名_N 取第N个值
- Default Value：未取到值的时候默认值
3、json提取器提取方法介绍：
$.你要提取的参数
1、响应类似{"属性":[{"sx":1},{},{}]}，整个响应是个对象。取sx的值：$.属性[0].sx
2、修改json extractor 获取数组的所有值 $[*].属性。match no=3取第3个
3、match no=5，数组越界后，取default values
4、修改json extractor 设置match no =-1 匹配对应字段所有值；并修改接收参数的http请求的参数为 ${varname_N}。N=1-4
我想提取code参数值：
JSON Path Extractor：$.code
提取username参数值：
JSON Path Extractor：$.list[0].username
如果提取的参数不存在父级？
$.你要提取的参数名
提取的参数存在父级
$.你要提取的参数名的父亲.你要提取的参数名
如果提取参数的父级存在父级
$.你要提取的参数名的父亲的父亲(爷爷).你要提取的参数名的父亲.你要提取的参数名
参数如果是数组？
$.你要提取的参数参数[N]
以下标的形式取值，0代表取的数组中第一个值，1代表取的是数组中第二个值，N代表取的数组中第N+1个值
4、提取（单个值）
{
"path": "\/api\/ou\/org\/tree",
"data": [
{
"dLevel": "0",
"isAble": "1",
"city": null,
"creatorId": null,
"updateTime": 1615276836000,
"remark": null,
"sort": 0,
"type": null,
"parentId": "1",
"dLevelCode": "000001",
"province": null,
"createTime": 1615276836000,
"reviserId": null,
"simpleName": "测试",
"children": null,
"tenantId": "",
"name": "测试数据",
"contactNumber": null,
"id": "3f28875b7815fda40178160086c80008",
"deptCode": "meritdata"
}
],
"success": true,
"message": "成功",
"stackmessage": null,
"timestamp": 1620357542328,
"status": 1,
"extraInfo": {
}
}
- 如下所示，是一个提取单个值的示例。
5、提取（多个值）
提取多个值得json内容和提取单个值得格式保持一致，多个之间分别用分号来隔开
样例数据
{
"path": "\/api\/ou\/org\/tree",
"data": [
{
"dLevel": "0",
"isAble": "1",
"city": null,
"creatorId": null,
"updateTime": 1616567075000,
"remark": null,
"sort": 1,
"type": null,
"parentId": "3f28875b7815fda40178160086c80008",
"dLevelCode": "000001000002",
"province": null,
"createTime": 1616567075000,
"reviserId": null,
"simpleName": "aaaa",
"children": null,
"tenantId": "",
"name": "aaaa",
"contactNumber": null,
"id": "3f28875b783e17df017862e80146007b",
"deptCode": "aaaa"
},
{
"dLevel": "0",
"isAble": "1",
"city": null,
"creatorId": null,
"updateTime": 1620295113000,
"remark": "",
"sort": 1,
"type": null,
"parentId": "3f28875b7815fda40178160086c80008",
"dLevelCode": "000001000003",
"province": null,
"createTime": null,
"reviserId": null,
"simpleName": "test001",
"children": null,
"tenantId": "",
"name": "test001",
"contactNumber": null,
"id": "3f28875b791718ac01792163c22c002e",
"deptCode": "test001"
},
{
"dLevel": "0",
"isAble": "1",
"city": null,
"creatorId": null,
"updateTime": 1620355231000,
"remark": null,
"sort": 1,
"type": null,
"parentId": "3f28875b7815fda40178160086c80008",
"dLevelCode": "000001000004",
"province": null,
"createTime": 1620355231000,
"reviserId": null,
"simpleName": "test_001",
"children": null,
"tenantId": "",
"name": "test_001",
"contactNumber": null,
"id": "3f28875b793f33c5017944b2b0a104f7",
"deptCode": "test_001"
},
{
"dLevel": "0",
"isAble": "1",
"city": null,
"creatorId": null,
"updateTime": 1620355231000,
"remark": null,
"sort": 2,
"type": null,
"parentId": "3f28875b7815fda40178160086c80008",
"dLevelCode": "000001000005",
"province": null,
"createTime": 1620355231000,
"reviserId": null,
"simpleName": "test_002",
"children": null,
"tenantId": "",
"name": "test_002",
"contactNumber": null,
"id": "3f28875b793f33c5017944b2b0ef04f9",
"deptCode": "test_002"
},
{
"dLevel": "0",
"isAble": "1",
"city": null,
"creatorId": null,
"updateTime": 1620355232000,
"remark": null,
"sort": 3,
"type": null,
"parentId": "3f28875b7815fda40178160086c80008",
"dLevelCode": "000001000006",
"province": null,
"createTime": 1620355232000,
"reviserId": null,
"simpleName": "test_003",
"children": null,
"tenantId": "",
"name": "test_003",
"contactNumber": null,
"id": "3f28875b793f33c5017944b2b12e04fb",
"deptCode": "test_003"
},
{
"dLevel": "0",
"isAble": "1",
"city": null,
"creatorId": null,
"updateTime": 1620355232000,
"remark": null,
"sort": 4,
"type": null,
"parentId": "3f28875b7815fda40178160086c80008",
"dLevelCode": "000001000007",
"province": null,
"createTime": 1620355232000,
"reviserId": null,
"simpleName": "test_004",
"children": null,
"tenantId": "",
"name": "test_004",
"contactNumber": null,
"id": "3f28875b793f33c5017944b2b1ab04fd",
"deptCode": "test_004"
},
{
"dLevel": "0",
"isAble": "1",
"city": null,
"creatorId": null,
"updateTime": 1620355232000,
"remark": null,
"sort": 5,
"type": null,
"parentId": "3f28875b7815fda40178160086c80008",
"dLevelCode": "000001000008",
"province": null,
"createTime": 1620355232000,
"reviserId": null,
"simpleName": "test_005",
"children": null,
"tenantId": "",
"name": "test_005",
"contactNumber": null,
"id": "3f28875b793f33c5017944b2b20804ff",
"deptCode": "test_005"
},
{
"dLevel": "0",
"isAble": "1",
"city": null,
"creatorId": null,
"updateTime": 1620355232000,
"remark": null,
"sort": 6,
"type": null,
"parentId": "3f28875b7815fda40178160086c80008",
"dLevelCode": "000001000009",
"province": null,
"createTime": 1620355232000,
"reviserId": null,
"simpleName": "test_006",
"children": null,
"tenantId": "",
"name": "test_006",
"contactNumber": null,
"id": "3f28875b793f33c5017944b2b2660501",
"deptCode": "test_006"
}
],
"success": true,
"message": "成功",
"stackmessage": null,
"timestamp": 1620357542356,
"status": 1,
"extraInfo": {
}
}
6、动态传值（多个值）
使用场景： 场景包含多个接口，多个接口有参数传递；
样例场景： 测试数据创建创景，包含新建模型、导入属性、生效模型三个主要接口，其中生效模型接口需要拿到新建模型完成后的模型名称和id，作为生效的依据。
为后续的自动化提供便利。。。。。。