Effective java 系列之异常转译

异常转译:当位于最上层的子系统不需要关心底层的异常细节时,常见的作法时捕获原始异常,把它转换一个新的不同类型的异常,在将新异常抛出。

通常方法捕获底层异常,然后抛高层异常。

 public static long write2File(String dataStr, String filePath) {
        long fileSize = 0L;
        try (
                RandomAccessFile raf = new RandomAccessFile(createFileAbsolute(filePath), "rw");
                FileChannel fchannel = raf.getChannel()
        ) {
            ByteBuffer buf = ByteBuffer.allocate(1024);

            buf.clear();
            buf.put(dataStr.getBytes());
            buf.flip();

            while (buf.hasRemaining()) {
                fchannel.write(buf);
            }

            fileSize = fchannel.size();

        } catch (FileNotFoundException e) {
            //e.printStackTrace();
            logger.error("",e);
            throw new RuntimeException("File not found");

        } catch (IOException e) {
            //e.printStackTrace();
            logger.error("",e);
            throw new RuntimeException("File not found");
        }

        return fileSize;
    }

然后调用方法去捕获RunTimeException,处理异常。

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转载自www.cnblogs.com/xiaozhuanfeng/p/10731602.html