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  • Java 文件和byte数组转换

    /**
         * 获得指定文件的byte数组
         */  
        private byte[] getBytes(String filePath){  
            byte[] buffer = null;  
            try {  
                File file = new File(filePath);  
                FileInputStream fis = new FileInputStream(file);  
                ByteArrayOutputStream bos = new ByteArrayOutputStream(1000);  
                byte[] b = new byte[1000];  
                int n;  
                while ((n = fis.read(b)) != -1) {  
                    bos.write(b, 0, n);  
                }  
                fis.close();  
                bos.close();  
                buffer = bos.toByteArray();  
            } catch (FileNotFoundException e) {  
                e.printStackTrace();  
            } catch (IOException e) {  
                e.printStackTrace();  
            }  
            return buffer;  
        }
        
        /**
         * 根据byte数组,生成文件
         */  
        public static void getFile(byte[] bfile, String filePath,String fileName) {  
            BufferedOutputStream bos = null;  
            FileOutputStream fos = null;  
            File file = null;  
            try {  
                File dir = new File(filePath);  
                if(!dir.exists()&&dir.isDirectory()){//判断文件目录是否存在  
                    dir.mkdirs();  
                }  
                file = new File(filePath+"\"+fileName);  
                fos = new FileOutputStream(file);  
                bos = new BufferedOutputStream(fos);  
                bos.write(bfile);  
            } catch (Exception e) {  
                e.printStackTrace();  
            } finally {  
                if (bos != null) {  
                    try {  
                        bos.close();  
                    } catch (IOException e1) {  
                        e1.printStackTrace();  
                    }  
                }  
                if (fos != null) {  
                    try {  
                        fos.close();  
                    } catch (IOException e1) {  
                        e1.printStackTrace();  
                    }  
                }  
            }  
        }

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  • 原文地址:https://www.cnblogs.com/yanduanduan/p/5438239.html
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