Jmeter -jsr 223-外部库出错
我的java代码导入org.web3j，按预期运行，没有错误

package test;

import java.nio.charset.StandardCharsets;
import org.web3j.crypto.Credentials;
import org.web3j.crypto.Sign;
import org.web3j.utils.Numeric;

public class test2 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        String privateAccountKey = "privateAccountKey ";
        Credentials credentials = Credentials.create(privateAccountKey);
        String message="messageABC";
        byte[] messageBytes = message.getBytes(StandardCharsets.UTF_8);

        Sign.SignatureData signature = Sign.signPrefixedMessage(messageBytes, credentials.getEcKeyPair());

        byte[] value = new byte[65];
        System.arraycopy(signature.getR(), 0, value, 0, 32);
        System.arraycopy(signature.getS(), 0, value, 32, 32);
        System.arraycopy(signature.getV(), 0, value, 64, 1);
        System.out.println("signature: " + Numeric.toHexString(value));

    }

}

在jmeter中，我使用JSR 223后处理器

我已经将core-5.0.0.jar添加到文件夹apache-jmeter-5.5\lib\ext（从https://mvnrepository.com/artifact/org.web3j/core/5.0.0下载）并重新启动jmeter
运行后，错误显示为javax.script.ScriptException：来源文件：内联评估：import java.nio.charset.StandardCharsets; import org.web3j.crypto.Credentials; i . . . '' : Typed variable declaration : Class: Credentials not found in namespace : at Line: 7 : in file: inline evaluation of:导入java.nio.charset. standard字符集;导入. web3j.crypto.Credentials;我. . . ..."“：行内评价中的凭证：'导入java.nio.charset.standardCharsets;导入. web3j.crypto.Credentials; i . . .第7行的“”

请指教多谢