| 提交 | 用户 | age | ||
| 826b66 | 1 | package com.hx.util; |
| C | 2 | |
| 3 | import org.apache.commons.io.FileUtils; | |
| 4 | ||
| 5 | import java.io.*; | |
| 6 | import java.net.URL; | |
| 7 | ||
| 8 | /** | |
| 9 | * 文件读取工具类 | |
| 10 | * @author ChenJiaHe | |
| 11 | * @Date 2020-06-17 | |
| 12 | */ | |
| 13 | public class FileUtil { | |
| 14 | ||
| 15 | /** | |
| 16 | * @param pathUrl 网络路径 | |
| 17 | * @return 文件 | |
| 18 | */ | |
| 19 | public static File getUrlFile(String pathUrl){ | |
| 20 | File temp = null; | |
| 21 | try{ | |
| 22 | URL url = new URL(pathUrl); | |
| 23 | temp = File.createTempFile("temp", ".xls"); | |
| 24 | FileUtils.copyURLToFile(url, temp); | |
| 25 | temp.deleteOnExit(); | |
| 26 | }catch (Exception e){ | |
| 27 | throw new RuntimeException("通过URL获取文件出错",e); | |
| 28 | } | |
| 29 | return temp; | |
| 30 | } | |
| 31 | ||
| 32 | /** | |
| 33 | * 读取文件内容，作为字符串返回 | |
| 34 | */ | |
| 35 | public static String readFileAsString(String filePath) throws IOException { | |
| 36 | File file = new File(filePath); | |
| 37 | if (!file.exists()) { | |
| 38 | throw new FileNotFoundException(filePath); | |
| 39 | } | |
| 40 | ||
| 41 | if (file.length() > 1024 * 1024 * 1024) { | |
| 42 | throw new IOException("File is too large"); | |
| 43 | } | |
| 44 | ||
| 45 | StringBuilder sb = new StringBuilder((int) (file.length())); | |
| 46 | // 创建字节输入流 | |
| 47 | FileInputStream fis = new FileInputStream(filePath); | |
| 48 | // 创建一个长度为10240的Buffer | |
| 49 | byte[] bbuf = new byte[10240]; | |
| 50 | // 用于保存实际读取的字节数 | |
| 51 | int hasRead = 0; | |
| 52 | while ( (hasRead = fis.read(bbuf)) > 0 ) { | |
| 53 | sb.append(new String(bbuf, 0, hasRead)); | |
| 54 | } | |
| 55 | fis.close(); | |
| 56 | return sb.toString(); | |
| 57 | } | |
| 58 | ||
| 59 | /** | |
| 60 | * 根据文件路径读取byte[] 数组 | |
| 61 | */ | |
| 62 | public static byte[] readFileByBytes(String filePath) throws IOException { | |
| 63 | File file = new File(filePath); | |
| 64 | if (!file.exists()) { | |
| 65 | throw new FileNotFoundException(filePath); | |
| 66 | } else { | |
| 67 | ByteArrayOutputStream bos = new ByteArrayOutputStream((int) file.length()); | |
| 68 | BufferedInputStream in = null; | |
| 69 | ||
| 70 | try { | |
| 71 | in = new BufferedInputStream(new FileInputStream(file)); | |
| 72 | short bufSize = 1024; | |
| 73 | byte[] buffer = new byte[bufSize]; | |
| 74 | int len1; | |
| 75 | while (-1 != (len1 = in.read(buffer, 0, bufSize))) { | |
| 76 | bos.write(buffer, 0, len1); | |
| 77 | } | |
| 78 | ||
| 79 | byte[] var7 = bos.toByteArray(); | |
| 80 | return var7; | |
| 81 | } finally { | |
| 82 | try { | |
| 83 | if (in != null) { | |
| 84 | in.close(); | |
| 85 | } | |
| 86 | } catch (IOException var14) { | |
| 87 | var14.printStackTrace(); | |
| 88 | } | |
| 89 | ||
| 90 | bos.close(); | |
| 91 | } | |
| 92 | } | |
| 93 | } | |
| 94 | } | |
