java如何接收python返回的bytes对象？

Question

java通过jep调用python脚本，python脚本执行后返回一个bytes类型的对象，最终希望转为java的byte[]存进数据库，java该如何接收？

python代码

import pickle
import ast

def dumps(param):
    # 字符串转为字典对象
    dict_param = ast.literal_eval(param)
    # 字典对象转为二进制对象
    bin_param = pickle.dumps(dict_param)
    return bin_param

java代码，目前通过String接收，但是会报错

            MainInterpreter.setJepLibraryPath("D:\\program\\Python\\Lib\\site-packages\\jep\\jep.dll");
            Map<String, Object> map = new HashMap<>();
            map.put("param", value);
            String result = JepUtils.execJepScript(
                    () -> Lists.newArrayList("from python_parameter.dumps_parameter import dumps"),
                    () -> map,
                    () -> "dumps(param)", String.class);

补充：
尝试过在python代码中将bytes转为str，java以String接收后再转为byte[]，但发现并不是想要的结果，代码如下：

import pickle
import ast

def dumps(param):
    # 字符串转为字典对象
    dict_param = ast.literal_eval(param)
    # 字典对象转为二进制对象
    bin_param = pickle.dumps(dict_param)
    # 二进制对象转为str
    return str(bin_param)

public byte[] dumps(String value) {
        try {
            MainInterpreter.setJepLibraryPath("D:\\program\\Python\\Lib\\site-packages\\jep\\jep.dll");
            Map<String, Object> map = new HashMap<>();
            map.put("param", value);
            String result = JepUtils.execJepScript(
                    () -> Lists.newArrayList("from python_parameter.dumps_parameter import dumps"),
                    () -> map,
                    () -> "dumps(param)", String.class);

            return hexStringToBytes(result);
        } catch (JepException e) {
            e.printStackTrace();
        }
        return null;
    }

    public static byte[] hexStringToBytes(String hexString) {
        if (hexString == null || hexString.equals("")) {
            return null;
        }
        hexString = hexString.toUpperCase();
        int length = hexString.length() / 2;
        char[] hexChars = hexString.toCharArray();
        byte[] d = new byte[length];
        for (int i = 0; i < length; i++) {
            int pos = i * 2;
            d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));
        }
        return d;
    }

    private static byte charToByte(char c) {
        return (byte) "0123456789ABCDEF".indexOf(c);
    }

Answer 1

在python端将bytes类型转成字符串对象 传过去呢？