Java读取文件中多个JSON对象

File file = new File("/home/renjx/testcases.json");//将json转为mapsObjectMapper objectMapper = new ObjectMapper();List<Map<String, String>> maps = objectMapper.readValue(file, new TypeReference<List<Map<String, String>>>() {});for (Map<String, String> map : maps) {//将16进制字符串转为byte[]byte[] privateKey = DatatypeConverter.parseHexBinary(map.get("private_key"));byte[] publicKey = DatatypeConverter.parseHexBinary(map.get("public_key"));byte[] signature = DatatypeConverter.parseHexBinary(map.get("signature"));byte[] encrypted_message = DatatypeConverter.parseHexBinary(map.get("encrypted_message"));String message = map.get("message");boolean isValid = Secp256k1Crypto.verifySignature(message.getBytes(), signature, publicKey);if (!isValid) {logger.warn("sign and verify failed!");break;}byte[] plainText = Secp256k1Crypto.decryptMessage(encrypted_message, privateKey, (byte) 0x02);if (!Arrays.equals(plainText, message.getBytes())){logger.warn("sign and verify failed!");break;}}

将byte写入到json文件中

private static void testCVerifySignatureAndDecryptMessage() throws Exception {byte[] privateKey = Secp256k1Crypto.generatePrivateKey();byte[] publicKey = Secp256k1Crypto.generatePublicKeyFromPrivateKey(privateKey);int randomInt = new Random().nextInt(512);String hexString = CommonUtil.generateRandomHexString(randomInt * 2);byte[] signature = Secp256k1Crypto.signMessage(hexString.getBytes(), privateKey);byte[] cipher = Secp256k1Crypto.encryptMessage(hexString.getBytes(), publicKey, (byte) 0x02);String private_key = bytesToHexFun(privateKey);String public_key = bytesToHexFun(publicKey);String signatures = bytesToHexFun(signature);String encrypted_message = bytesToHexFun(cipher);Map<String, Object> map = new HashMap<>();map.put("private_key", private_key);map.put("public_key", public_key);map.put("signature", signatures);map.put("encrypted_message", encrypted_message);map.put("message", hexString);String filePath = "/home/renjx/testcasesJava.json";String isWrite = writeJson(filePath, map, true);System.out.println(isWrite);}public static String writeJson(String jsonPath, Map<String, Object> inMap, boolean flag) {// Map数据转化为Json，再转换为StringString data = new JSONObject(inMap).toString();File jsonFile = new File(jsonPath);try {// 文件不存在就创建文件if (!jsonFile.exists()) {jsonFile.createNewFile();}FileWriter fileWriter = new FileWriter(jsonFile.getAbsoluteFile(), flag);BufferedWriter bw = new BufferedWriter(fileWriter);bw.write(data);bw.close();return "success";} catch (IOException e) {return "error";}}//将byte转为16进制字符串public static String bytesToHexFun(byte[] bytes) {char[] buf = new char[bytes.length * 2];int index = 0;for(byte b : bytes) { // 利用位运算进行转换，可以看作方法一的变种buf[index++] = HEX_CHAR[b >>> 4 & 0xf];buf[index++] = HEX_CHAR[b & 0xf];}return new String(buf);}private static final char[] HEX_CHAR = {'0', '1', '2', '3', '4', '5','6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};