打开eclipse,新建maven工程,在pom中引入jmeter核心jar包:
<!-- https://mvnrepository.com/artifact/org.apache.jmeter/ApacheJMeter_core -->
<dependency>
<groupId>org.apache.jmeter</groupId>
<artifactId>ApacheJMeter_core</artifactId>
<version>3.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.jmeter/ApacheJMeter_functions -->
<dependency>
<groupId>org.apache.jmeter</groupId>
<artifactId>ApacheJMeter_functions</artifactId>
<version>3.2</version>
</dependency>
1. 新建一个包com.mytest.functions,包名要包含functions,因为jmeter.properties对这块有配置,可见该文件的classfinder.functions.contain=.functions.
2. 在该包下新建一个类并继承AbstractFunction,重写该类的所有方法,具体如下:
package com.mytest.functions;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import org.apache.jmeter.engine.util.CompoundVariable;
import org.apache.jmeter.functions.AbstractFunction;
import org.apache.jmeter.functions.InvalidVariableException;
import org.apache.jmeter.samplers.SampleResult;
import org.apache.jmeter.samplers.Sampler;
import org.apache.jmeter.threads.JMeterVariables;
import sun.misc.BASE64Encoder;
public class MyBase64 extends AbstractFunction{
//自定义function的描述
private static final List<String> desc = new LinkedList<String>();
static {
desc.add("图片路径");
}
desc.add("图片base64后存放变量");
private static final String KEY = "__MyBase64";
//存放传入参数的值的变量
private Object[] values;
//描述参数
public List<String> getArgumentDesc() {
// TODO Auto-generated method stub
return desc;
@Override
//函数的执行
public synchronized String execute(SampleResult arg0, Sampler arg1) throws InvalidVariableException {
JMeterVariables localJMeterVariables = getVariables();
String str1 = ((CompoundVariable)this.values[0]).execute();
String str2 = getImgBase64(str1);
if ((localJMeterVariables != null) && (this.values.length > 1)) {
String str3 = ((CompoundVariable)this.values[1]).execute().trim();
localJMeterVariables.put(str3, str2);
}
return str2;
public String getReferenceKey() {
//提供jmeter函数助手显示的名称
return KEY;
public synchronized void setParameters(Collection<CompoundVariable> arg0) throws InvalidVariableException {
//检查参数的个数,支持的方法有2个,具体用法参加api:
//-----------------
*
int min,
int max)
min - minimum number of parameters allowed
max - maximum number of parameters allowed
//checkParameterCount(arg0, 1);
checkParameterCount(arg0, 1, 2);
//将参数值存入变量中
this.values = arg0.toArray();
public String getImgBase64(String filePath) {
InputStream in = null;
byte[] data = null;
String result = null;
try {
in = new FileInputStream(filePath);
data = new byte[in.available()];
in.read(data);
in.close();
BASE64Encoder encoder = new BASE64Encoder();
result = encoder.encode(data);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return result;
}
3. 由于我写的类没有依赖第三方jar包,引入的jmeter核心包都是jmeter自带的,所以直接导出上面的类为一个jar包,并把这个jar放在jmeter安装目录的apache-jmeter-3.2\lib\ext下面
4. 重启jmeter,打开函数助手,可看见如下图:
5. 下面我们测试一下这个函数是否能使用,新建一个http请求,在post请求里分别添加${__MyBase64(D:\\aa.jpg,imgresult)}和${imgresult}如下图,注意${__MyBase64(D:\\aa.jpg,imgresult)}一定要在上面
6. 运行后可以看到已经成功
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