| 提交 | 用户 | age | ||
| 5c5945 | 1 | package com.hx.util; |
| E | 2 | |
| 3 | import java.io.*; | |
| 4 | ||
| 5 | /** | |
| 6 | * 文件读取工具类 | |
| 7 | * @author ChenJiaHe | |
| 8 | * @Date 2020-06-17 | |
| 9 | */ | |
| 10 | public class FileUtil { | |
| 11 | ||
| 12 | /** | |
| 13 | * 读取文件内容，作为字符串返回 | |
| 14 | */ | |
| 15 | public static String readFileAsString(String filePath) throws IOException { | |
| 16 | File file = new File(filePath); | |
| 17 | if (!file.exists()) { | |
| 18 | throw new FileNotFoundException(filePath); | |
| 19 | } | |
| 20 | ||
| 21 | if (file.length() > 1024 * 1024 * 1024) { | |
| 22 | throw new IOException("File is too large"); | |
| 23 | } | |
| 24 | ||
| 25 | StringBuilder sb = new StringBuilder((int) (file.length())); | |
| 26 | // 创建字节输入流 | |
| 27 | FileInputStream fis = new FileInputStream(filePath); | |
| 28 | // 创建一个长度为10240的Buffer | |
| 29 | byte[] bbuf = new byte[10240]; | |
| 30 | // 用于保存实际读取的字节数 | |
| 31 | int hasRead = 0; | |
| 32 | while ( (hasRead = fis.read(bbuf)) > 0 ) { | |
| 33 | sb.append(new String(bbuf, 0, hasRead)); | |
| 34 | } | |
| 35 | fis.close(); | |
| 36 | return sb.toString(); | |
| 37 | } | |
| 38 | ||
| 39 | /** | |
| 40 | * 根据文件路径读取byte[] 数组 | |
| 41 | */ | |
| 42 | public static byte[] readFileByBytes(String filePath) throws IOException { | |
| 43 | File file = new File(filePath); | |
| 44 | if (!file.exists()) { | |
| 45 | throw new FileNotFoundException(filePath); | |
| 46 | } else { | |
| 47 | ByteArrayOutputStream bos = new ByteArrayOutputStream((int) file.length()); | |
| 48 | BufferedInputStream in = null; | |
| 49 | ||
| 50 | try { | |
| 51 | in = new BufferedInputStream(new FileInputStream(file)); | |
| 52 | short bufSize = 1024; | |
| 53 | byte[] buffer = new byte[bufSize]; | |
| 54 | int len1; | |
| 55 | while (-1 != (len1 = in.read(buffer, 0, bufSize))) { | |
| 56 | bos.write(buffer, 0, len1); | |
| 57 | } | |
| 58 | ||
| 59 | byte[] var7 = bos.toByteArray(); | |
| 60 | return var7; | |
| 61 | } finally { | |
| 62 | try { | |
| 63 | if (in != null) { | |
| 64 | in.close(); | |
| 65 | } | |
| 66 | } catch (IOException var14) { | |
| 67 | var14.printStackTrace(); | |
| 68 | } | |
| 69 | ||
| 70 | bos.close(); | |
| 71 | } | |
| 72 | } | |
| 73 | } | |
| 74 | } | |
