public class SerializeMyUtils { private SerializeMyUtils(){}; public static Object unserialize(byte[] bytes){ if(null == bytes || bytes.length == 0){ return null; } ByteArrayInputStream bais = null; ObjectInputStream ois = null; Object obj = null; try{ bais = new ByteArrayInputStream(bytes); ois = new ObjectInputStream(bais); obj = ois.readObject(); }catch(Exception e){ e.printStackTrace(); }finally{ try{ if(ois != null){ ois.close(); } }catch(Exception e){ e.printStackTrace(); } try{ if(bais != null){ bais.close(); } }catch(Exception e){ e.printStackTrace(); } } return obj; } public static byte[] serialize(Object obj){ if(null == obj){ return null; } ByteArrayOutputStream baos = null; ObjectOutputStream oos = null; byte[] bs = null; try{ baos = new ByteArrayOutputStream(); oos = new ObjectOutputStream(baos); oos.writeObject(obj); bs = baos.toByteArray(); }catch(Exception e){ e.printStackTrace(); }finally{ try { if(null != oos){ oos.close(); } } catch (IOException e) { e.printStackTrace(); } try { if(null != baos){ baos.close(); } } catch (IOException e) { e.printStackTrace(); } } return bs; } }
简单读取的代码:
public static void main(String[] args){ URLConnection myConn = null; InputStream in = null; BufferedReader br = null; URL myUrl = null; try{ myUrl = new URL("https://www.aicailang.com/new/invManadmcAgrPc"); myConn = myUrl.openConnection(); //打开连接 in = myConn.getInputStream(); //获取输入流 br = new BufferedReader(new InputStreamReader(in)); String line = null; while((line = br.readLine()) != null){ System.out.println(line); } }catch(Exception e){ e.printStackTrace(); }finally{ if(null != br){ try { br.close(); } catch (IOException e) { e.printStackTrace(); } } if(null != in){ try { in.close(); } catch (IOException e) { e.printStackTrace(); } } } }
流的转换简单实现
/** * 获取字节流文件 * @param f * @return */ public static byte[] getBytesFromFile(File f) { try { FileInputStream fileInputStream = null; try { fileInputStream = new FileInputStream(f); byte[] b = new byte[fileInputStream.available()]; fileInputStream.read(b); return b; } catch (Exception e) { throw e; } finally { try { if (fileInputStream != null) { fileInputStream.close(); } } catch (IOException e) { } } } catch (Exception e) { LOGGER.error(e.getMessage(), e); } return null; } /** * 写文件 * @param savePath * @param data */ public static void wirteDataToFile(String savePath,byte[] data){ try { FileOutputStream fileOutputStream=null; try { fileOutputStream = new FileOutputStream(savePath); fileOutputStream.write(data); fileOutputStream.flush(); } catch (Exception e) { throw e; } finally { try { if (fileOutputStream != null) { fileOutputStream.close(); } } catch (IOException e) { } } } catch (Exception e) { LOGGER.error(e.getMessage(), e); } } /** * 创建临时文件目录 * @param prefix * @param suffix * @return */ public static File createTempDir(){ try { //File tempPath = new File("./temp"); //创建相对路径的临时文件目录 File tempPath = new File(System.getProperty("java.io.tmpdir")); if(!tempPath.exists() || !tempPath.isDirectory()){ tempPath.mkdir(); //如果不存在,则创建该文件夹 } return tempPath; } catch (Exception e) { LOGGER.error(e.getMessage(), e); } return null; } private static File createTempFile(String prefix, String suffix, File tempPath)throws IOException { File tempFile = File.createTempFile(prefix, suffix, tempPath); return tempFile; }