使用Java Runtime执行docker下的mysqldump

云水冰2024-03-18 11:22

Runtime直接使用 docker exec mysql mysqldump -u%s -p%s cblog > %s（%s是需要填充的数据），命令无法执行并且不会报错，需要使用字符串数组加入"sh", "-c"，具体代码示例：

java 复制代码

    /**
     * MySQL数据备份
     *
     * @param dataPath 备份文件的保存路径
     * @throws IOException
     */
    private void backupData(String dataPath) throws IOException {
        long start = System.currentTimeMillis();
        String cmd = String.format("docker exec mysql mysqldump -u%s -p%s cblog > %s", dataSourceProperties.getUsername(), dataSourceProperties.getPassword(), dataPath);
        String[] cmds = {"sh", "-c", cmd};
        log.debug("欲执行命令：{}", cmd);
        try (InputStream inputStream = Runtime.getRuntime().exec(cmds).getInputStream();
             InputStreamReader inputStreamReader = new InputStreamReader(inputStream, StandardCharsets.UTF_8);
             BufferedReader bufferedReader = new BufferedReader(inputStreamReader);) {
            String line = bufferedReader.readLine();
            while (line != null) {
                log.debug(line);
                line = bufferedReader.readLine();
            }
        }
        long end = System.currentTimeMillis();
        log.info("mysql备份命令执行成功,耗时：{}ms", end - start);
    }