JMeter record the BeanShell written into excel instance caused by an automatic data generation

【 The end of the article leaves a lot of benefits for everyone 】

One 、 Preface

　　 Recently, work and life are busy , Neither busy nor busy , But I haven't felt it for a long time get New technical skills , There is no such thing as Yichui , Ha ha ha , Today, let's talk about the recent get To the small skills of it .

　　 In the work , Because a certain requirement requires hundreds of data to verify an interface , You can't add it manually , Based on the tight test cycle , Directly consider using jmeter The loop controller of .

Two 、 Interface background

　　 Business description ： Click the Create button , Pop up the creation interface , After entering the required items , Click ok , Return to create data successfully .

1、 Create an interface

　　 You need to use this interface to create data , The description of the interface is as follows ：

　　1） Interface request method ：PUT

　　2） The fields of variables required for the input parameters that must be passed are ：userCode,userId,userName,remarkid 

　　3） The remaining fields are based on the actual business , You can transfer a fixed value

Ideas tip： First, confirm the variable field , Secondly, confirm the source of variable fields , Finally, confirm how to get variables . In the current instance , except remarkid, rest 3 Variable fields are read from another query interface , See page for details 2 spot .

2、 Query user interface

　　 Creating interface , When you enter a user name, you call 【 Query the user 】 Interface , The data returned by this interface is 【 establish 】 Input parameter fields required in the interface , Back to json The format is as follows ：

3、 ... and 、Loop Controller Introduce

　　 This component has been used in work for a long time , Today, I suddenly found that I didn't write a detailed blog about this component , It's embarrassing , Now let's briefly understand the usage of this component .

 　　Loop Count： cycles , Divided into forever 、 Custom times —— Check Forever after , Custom times are grayed out and cannot be entered , Uncheck , Then you can

　　 Literally , In fact, it is the request under the controller , Generally, it is used together with the counter , According to the actual scene .

　　 If you are very familiar with Jmeter The tool , You must also know that thread groups can also set the number of cycles , In fact, these two can be understood as father son relationship , For example, the cycle controller sets the cycle 2 Time , Thread group set loop 4 Time , The result of execution is as follows ：   The threads run in cycles 4 round , Each round will request the interface 2 Time

Four 、 Method 1— Loop Controller Loop call interface

 1、 The script structure is as follows

2、 Use powerful JSON Extractor , Extract the returned fields

3、 The user query interface returns the following results

　　 Looking at the fruit tree Debug You can see the extracted userCode,userId,userName, among userCode_matchNr Indicates the total number of matches

 4、 Create interface input parameters and use variable values

　　 The query interface extracts all the values of the returned fields , The writing method of quoting variables is equivalent to ${userCode_1}, That can't be written dead in the entry _1 Well , Because you want to create a loop , We have to find a way to make userCode_x, hinder _x It can increase each time , So we should combine counter Counter functions .

　　 and __V Is to nest them ,__V Belongs to nested function , If you are interested, you can visit Baidu online , If you don't understand, just copy the string and change the variables .

　　remarkid Duplication is not allowed in business , So here we use Random function , That's the random number function , Let it randomly generate a string of numbers .

"userCode":"${__V(userCode_${__counter(\,)},)}","userName":"${__V(username_${__counter(\,)},)}","userId":"${__V(userId_${__counter(\,)},)}","remarkid":"${__Random(1000,9000,)}"

5、 The number of cycles of the loop controller uses the variable value

　　 The number of customizations in the loop controller allows for flexibility , Use the query interface to match the total number （ Variable _matchNr）, A total of 3 A field , So use any of these fields , Citation format ： ${username_matchNr}

6、 perform

　　 Complete the above steps , You can create data , I won't post the execution results .

5、 ... and 、 Method 2—Loop Controller Cycle call JDBC

　　 Follow the method 1 The steps are the same , Just the way 2 By calling jdbc request, namely sql Loop insert data , There is no mapping here , See the script structure for details , And then in jdbc Write a note inside insert sentence , Replace the corresponding fields with reference variables .

　　 notes ： perform insert,Query Type Need to choose 【Prepared Update Statement】

6、 ... and 、 Method 3—BeanShell write in excel, Generate... Manually sql sentence

1、BeanShell PostProcessor

　　 This is also through sql Insert , It's just manual insertion , Add BeanShell PostProcessor, The script is as follows ：

// Specify which file to write to 
FileWriter fs=new FileWriter("C:/Users/13710/Desktop/9000.csv",true);
// Create a character cache output stream 
BufferedWriter out = new BufferedWriter(fs);

// Another way to get the value of variables 
//int b = Integer.valueOf("${username_matchNr}");
//System.out.println(" The total number returned by the interface is ："+b);

for(int i=1;i<= ${username_matchNr};i++){
    username= vars.get("username_"+i);
    userId = vars.get("userId_"+i);
    userCode = vars.get("userCode_"+i);
    out.write(username+","+userCode+","+userId);
    out.write(System.getProperty("line.separator"));
    System.out.println(" The output value is ："+username);
    }

out.close();
fs.close();

2、 Automatically generated after execution .csv file

　　 You can see excel Are there in 3 Column , because beanshell The script gets 3 Variable fields are written excel In the

 3、 Use powerful excel Function generation sql sentence

　　D4 Column is to write one first sql Ha , After writing, drag down to automatically generate other , Table variables are referenced for all the variables that need to be changed , Format ："&A1&"

Cozy tip： If the string in the formula is too long , Use CONCATENATE function

Example 1（ This is not super ）：   =CONCATENATE("INSERT INTO contact(name, post,id)VALUES ("&A1&", '"&B1&","&C1&"');")

Example 2（ Divided into 4 A string , Because every string in the formula cannot exceed 255 character ）：

 4、 take D4 Columns can be directly copied to the database for execution

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