管理customReaderItem中的I/O和相关点异常

try {
    // 尝试读取文件
    FileReader fileReader = new FileReader("path/to/file.txt");
    BufferedReader bufferedReader = new BufferedReader(fileReader);
    String line;
    while ((line = bufferedReader.readLine()) != null) {
        System.out.println(line);
    }
    bufferedReader.close();
} catch (FileNotFoundException e) {
    System.err.println("文件未找到: " + e.getMessage());
} catch (IOException e) {
    System.err.println("读取文件时发生I/O错误: " + e.getMessage());
}

try {
    URL url = new URL("http://example.com/api");
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestMethod("GET");
    int responseCode = connection.getResponseCode();
    if (responseCode == HttpURLConnection.HTTP_OK) {
        BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();
        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();
        System.out.println(response.toString());
    } else {
        System.out.println("GET请求失败，响应码: " + responseCode);
    }
} catch (MalformedURLException e) {
    System.err.println("URL格式错误: " + e.getMessage());
} catch (IOException e) {
    System.err.println("网络通信异常: " + e.getMessage());
}