Jmeter JSR223 采样器 - 无法将数据写入 CSV 文件

Question

我正在使用 Jmeter v 4.0 r1823414。根据 this answer，有使用 JSR223 PostProcessor 的建议，逐字：

it is recommended to use Groovy for any form of scripting to consider migrating to JSR223 PostProcessor

在此方法之前，我尝试使用 BeanShell Sampler 将数据简单地写入 csv 文件。我从 blazemeter tutorial 页面获取的代码示例。但是，我遇到了错误

Sourced file: inline evaluation of: ``import java.io.FileWriter; import java.util.Arrays; import java.io.Writer; impor . . . '' : Typed variable declaration : Attempt to access property on undefined variable or class name

嗯，既然有人建议转移到JSR223 Sampler（或者PostProcessor，不知道它们在功能上有什么区别），我稍微修改了一下代码更 Java 基于 JSR223 Sampler:

import java.io.FileWriter;
import java.io.IOException;
import java.util.Arrays;
import java.io.Writer;
import java.util.List;

public class Main {

    //Default separator
    private static char SEPARATOR = ',';

    //get path of csv file (creates new one if its not exists)
    private static String csvFile = "C:/TiredOfProgramming/Work/results.csv"; // for example '/User/Downloads/blabla.csv'

    private static String[] params = {"hello", "world", "jmeter"};

    //function write line in csv
    private static void writeLine(FileWriter writer, String[] parameters, char separator) throws IOException
    {
        boolean firstParameter = true;
        StringBuilder stringBuilder = new StringBuilder();
        String parameter = " ";

        for (int i = 0; i < parameters.length; i++)
        {
            //get param
            parameter = parameters[i];
            log.info(parameter);

            //if the first param in the line, separator is not needed
            if (!firstParameter)
            {
                stringBuilder.append(separator);
            }

            //Add param to line
            stringBuilder.append(parameter);

            firstParameter = false;
        }

        //prepare file to next line
        stringBuilder.append("\n");

        //add to file the line
        log.info(stringBuilder.toString());
        writer.append(stringBuilder.toString());
    }

        FileWriter fileWriter = new FileWriter(csvFile, true);
        writeLine(fileWriter, params, SEPARATOR);

        //proper close to file
        fileWriter.flush();
        fileWriter.close();
}

此特定脚本失败并显示消息：

Script8.groovy: 15: unexpected token: hello @ line 15, column 39. private static String[] params = {"hello", "world", "jmeter"};

如果我在 IntelliJ IDE 中测试它，只需将 writeLine 方法包装到 main 方法中，一切正常

package com.tiredofprogramming;

import java.io.FileWriter;
import java.io.IOException;
import java.util.Arrays;
import java.io.Writer;
import java.util.List;

public class Main {

    //Default separator
    private static char SEPARATOR = ',';

    //get path of csv file (creates new one if its not exists)
    private static String csvFile = "C:\TiredOfProgramming\Work\results.csv"; // for example '/User/Downloads/blabla.csv'

    private static String[] params = {"hello", "world", "jmeter"};

    public static void main(String[] args) throws IOException {
        FileWriter fileWriter = new FileWriter(csvFile, true);
        writeLine(fileWriter, params, SEPARATOR);
        //proper close to file
        fileWriter.flush();
        fileWriter.close();
    }


    //function write line in csv
    private static void writeLine(FileWriter writer, String[] parameters, char separator) throws IOException
    {
        boolean firstParameter = true;
        StringBuilder stringBuilder = new StringBuilder();
        String parameter = " ";

        for (int i = 0; i < parameters.length; i++)
        {
            //get param
            parameter = parameters[i];
            System.out.println(parameter);

            //if the first param in the line, separator is not needed
            if (!firstParameter)
            {
                stringBuilder.append(separator);
            }

            //Add param to line
            stringBuilder.append(parameter);

            firstParameter = false;
        }

        //prepare file to next line
        stringBuilder.append("\n");

        //add to file the line
        System.out.println(stringBuilder.toString());
        writer.append(stringBuilder.toString());

  }
}

我的问题是：groovy 采样器是否理解 Java（在 SO post 之一中我看到提到 Groovy 理解 99% 的 java 句法）。有没有人使用 Jmeter 成功地将数据写入 csv 文件？

Answer 1

试试这个细微的修改：

//Default separator
char SEPARATOR = ',';

//get path of csv file (creates new one if its not exists)
String csvFile = "C:\TiredOfProgramming\Work\results.csv"; // for example '/User/Downloads/blabla.csv'

def params = ["hello", "world", "jmeter"];

//function write line in csv
def writeLine(FileWriter writer, List<String> parameters, char separator) throws IOException {
    boolean firstParameter = true;
    StringBuilder stringBuilder = new StringBuilder();
    String parameter = " ";

    for (int i = 0; i < parameters.size(); i++) {
        //get param
        parameter = parameters[i];
        log.info(parameter);

        //if the first param in the line, separator is not needed
        if (!firstParameter) {
            stringBuilder.append(separator);
        }

        //Add param to line
        stringBuilder.append(parameter);

        firstParameter = false;
    }

    //prepare file to next line
    stringBuilder.append("\n");

    //add to file the line
    log.info(stringBuilder.toString());
    writer.append(stringBuilder.toString());
}

FileWriter fileWriter = new FileWriter(csvFile, true);
writeLine(fileWriter, params, SEPARATOR);

//proper close to file
fileWriter.flush();
fileWriter.close();

然而，在 Groovy 中有更简单的方法可以实现相同的效果，查看：

Answer 2

您可以试试下面的代码。这是一个简单的代码片段，但您可以使用 JSR223 后处理器从 Jmeter 成功写入 csv 文件。

//get the JSON response from prev sampler

import com.eclipsesource.json.*;
import org.json.JSONArray;
import org.json.JSONObject;
import net.minidev.json.parser.JSONParser;
import java.io.*;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Iterator;

    String getResponse = prev.getResponseDataAsString();

    //parse the response and convert to string
    JSONParser parser = new JSONParser(JSONParser.MODE_JSON_SIMPLE);
    String parResponse = parser.parse(getResponse);

    String preResponse = parResponse.toString();
    //replace all commas with a semi-colon
    String csvResponse = preResponse.replaceAll(",", ";");

    //log response to file
    logFileName = "C:/apache-jmeter-5.1.1/Web_Service_Output.csv";
    BufferedWriter outLog = new BufferedWriter(new FileWriter(logFileName, true));
    outLog.write(csvResponse + "\n");
    outLog.close();

Jmeter JSR223 采样器 - 无法将数据写入 CSV 文件

Jmeter JSR223 Sampler - Unable to Write Data To CSV File

csv

jmeter

jsr223