问如何通过REST API Mule 4上传zip文件？

EN

package com.test;
 
import org.mule.transformer.*;
import org.mule.api.*;
import org.mule.api.transformer.*;
import java.io.*;
 
public class PayloadFileReader extends AbstractMessageTransformer
{
    public Object transformMessage(final MuleMessage message, final String outputEncoding) throws TransformerException {
        byte[] result = null;
        try {
            result = this.readZipFile("test.zip");
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        message.setPayload((Object)result);
        return message;
    }
    
    public String readFileTest(final String path) throws FileNotFoundException, IOException, Exception {
        final ClassLoader classLoader = this.getClass().getClassLoader();
        final File file = new File(classLoader.getResource(path).getFile());
        final FileReader fileReader = new FileReader(file);
        BufferedReader bufferReader = null;
        final StringBuilder stringBuffer = new StringBuilder();
        try {
            bufferReader = new BufferedReader(fileReader);
            String line;
            while ((line = bufferReader.readLine()) != null) {
                stringBuffer.append(line);
            }
        }
        catch (IOException e) {
            e.printStackTrace();
            if (bufferReader != null) {
                try {
                    bufferReader.close();
                }
                catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        finally {
            if (bufferReader != null) {
                try {
                    bufferReader.close();
                }
                catch (IOException e2) {
                    e2.printStackTrace();
                }
            }
        }
        return stringBuffer.toString();
    }
    
    public byte[] readZipFile(final String path) {
        final ClassLoader classLoader = this.getClass().getClassLoader();
        final File file = new File(classLoader.getResource(path).getFile());
        final byte[] b = new byte[(int)file.length()];
        try {
            final FileInputStream fileInputStream = new FileInputStream(file);
            fileInputStream.read(b);
            fileInputStream.close();
        }
        catch (FileNotFoundException e) {
            System.out.println("Not Found.");
            e.printStackTrace();
        }
        catch (IOException e2) {
            System.out.println("Error");
            e2.printStackTrace();
        }
        return b;
    }
}