性能测试——jmeter接口测试复习——后置处理器——正则表达式——提取数组——foreach循环控制器...

清疚 2023-10-03 16:21 3阅读 0赞

提取如下数据：

![b6f817935c941c4bdb64f103f0816022.png][]

![e51fa19c571d06beaa544814ab905fc8.png][]

![8fff0dee5fee95830ccef2cede41c597.png][]

![01bde1df2a33ca7445497c5b233c2737.png][]

![187afc8299abfc1c43c05bd1d0827c99.png][]

![5d22e33fad6048040359934a5883f6bb.png][]

![0e548dab17a2fb11b9cb6e6f0560a687.png][]

![b24b6b36b0e72fdf44f224f5adf40728.png][]

![11755a0261b71f56d8f2c14111cd0ebd.png][]

![b257b2df68b05ac487e36a1aa1ce4ec6.png][]

注意：

![52aba20cd05f1c46238e51ea37d398b1.png][]

![70dbe53f3c71b658fd971445c27e4040.png][]

![94bceada81d960fe32607f97abbf8d7c.png][]

运行结果如下：

![83628848f0aafc73643977c3aa5eab4d.png][]

========================================================================

### 前言 ###

*  ForEach 控制器一般和用户自定义变量/JDBC结果变量一起使用，用于可以遍历读取相关的返回值
 *  该控制器下的 Samplers 和控制器都会被执行一次或多次，每次读取不同的变量值
 *  ForEach 控制器和正则提取器是个好搭档，因为正则提取出来的变量值会用\_分隔，而 ForEach 可以省略 \_

### ForEach ###

[![e0d0ffc3bfd66923b203d51f1cce90be.png][]][e0d0ffc3bfd66923b203d51f1cce90be.png 1]

### ForEach 界面介绍 ###

[![b93b9852c190dc2f970579cc2975b761.png][]][b93b9852c190dc2f970579cc2975b761.png 1]

##### 字段含义 #####

<table> 
 <thead> 
  <tr> 
   <th>字段</th> 
   <th>含义</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td><span>Input Variable Prefix</span></td> 
   <td>输入变量名的前缀，默认为一个空字符串作为前缀。</td> 
  </tr> 
  <tr> 
   <td><span>Start index for loop(exclusive)</span></td> 
   <td> 
    <ul> 
     <li>循环开始的索引</li> 
     <li>不包括此值</li> 
     <li>默认从 1 开始</li> 
     <li>填 0 则起始索引是 1，填 1 则是 2</li> 
    </ul> </td> 
  </tr> 
  <tr> 
   <td>End index for loop(inclusive)</td> 
   <td> 
    <ul> 
     <li>循环结束的索引</li> 
     <li>包括此值</li> 
     <li>填 100 则结束索引是 100</li> 
    </ul> </td> 
  </tr> 
  <tr> 
   <td>Output variable</td> 
   <td> 
    <ul> 
     <li>输出的变量名</li> 
     <li>在后续循环中，samplers 可使用的变量名</li> 
    </ul> </td> 
  </tr> 
  <tr> 
   <td>Add”_”before number</td> 
   <td> 
    <ul> 
     <li>输入变量名和索引之间是否有&nbsp;<span>_&nbsp;间隔</span></li> 
     <li>不勾选的话，则输入变量名和索引直接相连</li> 
    </ul> </td> 
  </tr> 
 </tbody> 
</table>

### ForEach 结合用户自定义变量的栗子 ###

##### 线程组树结构 #####

[![f7bb7bb8129b6def340d26fa1ceca6a9.png][]][f7bb7bb8129b6def340d26fa1ceca6a9.png 1]

线程组，只有一个线程

##### 用户自定义变量 #####

[![0e55fa06d73b00455a8b9af5b16b81fd.png][]][0e55fa06d73b00455a8b9af5b16b81fd.png 1]

一共有四个

##### ForEach #####

[![34beb01de6aa8188f92930b67487c33c.png][]][34beb01de6aa8188f92930b67487c33c.png 1]

前缀为 name 的有四个变量，所以循环四次

##### 运行结果 #####

[![1ee842abe7ddb688b1894c80f1347ff7.png][]][1ee842abe7ddb688b1894c80f1347ff7.png 1]

##### 如果输出变量名称为空，需要怎么取循环的值？ #####

[![ad5aa0fe9367c5f2c2315210439067b7.png][]][ad5aa0fe9367c5f2c2315210439067b7.png 1]

直接取空即可 $\{\}

### ForEach 不勾选 Add”\_”before number 的栗子 ###

##### 线程组树结构 #####

[![282b1b79f97c7e682453bc98122b7b8f.png][]][f7bb7bb8129b6def340d26fa1ceca6a9.png 1]

##### 用户自定义变量 #####

[![ae9dfca34863a161bd5bb0803de16158.png][]][ae9dfca34863a161bd5bb0803de16158.png 1]

##### ForEach #####

[![9fc8b2729643517b7d4bff90f0240ea3.png][]][34beb01de6aa8188f92930b67487c33c.png 1]

##### 运行结果 #####

[![3911b0beb5b863acac9b87b1f76052de.png][]][3911b0beb5b863acac9b87b1f76052de.png 1]

### ForEach 结合 JDBC Request 的栗子一 ###

##### 线程组树结构 #####

[![89d7aab886a5ebd34b1f20c9f6c4b89b.png][]][89d7aab886a5ebd34b1f20c9f6c4b89b.png 1]

##### JDBC 运行结果 #####

[![b34fa8423f036b5d89395e7f2da35593.png][]][b34fa8423f036b5d89395e7f2da35593.png 1]

JDBC 一共返回 100 条数据，这里我们是通过 Variable names 去接住所有数据，对应有 100 个变量(mobile\_1 到 mobile\_100)

##### ForEach #####

[![ff9dc492227a2a258bc2f665d5d569ed.png][]][ff9dc492227a2a258bc2f665d5d569ed.png 1]

循环 100 次，输入变量 mobile\_1 - mobile\_100 并输出为 new\_mobile\_1 - new\_mobile\_100

##### 运行结果 #####

[![9ced7b3660c469a403ae74a13ed6d4f1.png][]][9ced7b3660c469a403ae74a13ed6d4f1.png 1]

### ForEach 结合 JDBC Request 的栗子二 ###

##### 线程组树结构 #####

[![7ccf1f370bb0440f9d774d58f9198dce.png][]][7ccf1f370bb0440f9d774d58f9198dce.png 1]

##### JDBC 运行结果 #####

[![b90aeba640607f4406779a0c70e6fb4f.png][]][b90aeba640607f4406779a0c70e6fb4f.png 1]

*  这里通过 Result Variable name 去接住所有数据，只有一个变量，是无法循环的
 *  所以我们需要通过**正则提取器**将需要的 mobile 字段的值提取出来

##### 正则提取器 #####

[![e78a0d33d3b112156918effb45ff1e17.png][]][e78a0d33d3b112156918effb45ff1e17.png 1]

##### 正则提取结果 #####

[![4098a79bb94403d318d70939d2284d28.png][]][4098a79bb94403d318d70939d2284d28.png 1]

我们要的其实是箭头的那些，但是正则会提取不必要的字段值(如：mobile\_new\_11\_g0)，所以注意 ForEach 的输入变量前缀要写正确

##### ForEach #####

[![1c4857b489b67a63e403f8316282346f.png][]][1c4857b489b67a63e403f8316282346f.png 1]

循环 100 次，输入变量 mobile\_new\_1 - mobile\_new\_100 并输出为 mobile\_1 - mobile\_100

##### 运行结果 #####

[![ccdf748519509f3427551c484acaaa04.png][]][ccdf748519509f3427551c484acaaa04.png 1]

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