文件转base64字符串
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | /** * file转换为base64 * 注意：这里转换为base64后，是不包含文件head头的 */public static String fileToBase64(File file) { Base64.Encoder base64 = Base64.getEncoder(); String base64Str = null; try (FileInputStream fis = new FileInputStream(file); ByteArrayOutputStream bos = new ByteArrayOutputStream()) { byte[] b = new byte[1024]; int n; while ((n = fis.read(b)) != -1) { bos.write(b, 0, n); } base64Str = base64.encodeToString(bos.toByteArray()); } catch (IOException e) { e.printStackTrace(); } return base64Str;} |
base64字符串转文件
1 2 3 4 5 6 7 8 9 10 11 | /** * base64转化为file，并保存到指定路径下 */public static void base64ToFile(String base, String path) { if (StringUtils.isBlank(base)) { return; } Base64.Decoder decoder = Base64.getDecoder(); try (OutputStream out = new FileOutputStream(path)) { byte[] bytes = decoder.decode(base); for (int i = 0; i |
base64转化为file流
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | /** * base64转化为file流 */public static File base64ToFile(String base64) { if (base64 == null || "".equals(base64)) { return null; } byte[] buff = Base64.getDecoder().decode(base64); File file; try { file = File.createTempFile("tmp", null); } catch (IOException e) { e.printStackTrace(); return null; } try (FileOutputStream out = new FileOutputStream(file)) { out.write(buff); } catch (IOException e) { e.printStackTrace(); } return file;} |
base64转MultipartFile
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 | import org.springframework.web.multipart.MultipartFile;import java.io.*;import java.util.Base64;/** * @author 笑小枫 */public class Base64DecodedMultipartFile implements MultipartFile { private final byte[] imgContent; private final String header; private final String fileName; public Base64DecodedMultipartFile(byte[] imgContent, String header, String fileName) { this.imgContent = imgContent; this.header = header.split(";")[0]; this.fileName = fileName; } @Override public String getName() { return fileName + "." + header.split("/")[1]; } @Override public String getOriginalFilename() { return fileName + "." + header.split("/")[1]; } @Override public String getContentType() { return header.split(":")[1]; } @Override public boolean isEmpty() { return imgContent == null || imgContent.length == 0; } @Override public long getSize() { return imgContent.length; } @Override public byte[] getBytes() { return imgContent; } @Override public InputStream getInputStream() { return new ByteArrayInputStream(imgContent); } @Override public void transferTo(File dest) throws IOException, IllegalStateException { try (FileOutputStream fos = new FileOutputStream(dest)) { fos.write(imgContent); } } /** * base64转multipartFile **/ public static MultipartFile base64Convert(String base64, String header, String fileName) { Base64.Decoder decoder = Base64.getDecoder(); byte[] b = decoder.decode(base64); //取索引为1的元素进行处理 for (int i = 0; i |
byte数组转MultiPartFile
- POM导入
1 | org.apache.httpcomponentshttpclient4.5.5org.springframeworkspring-testRELEASE |
- 代码部分
1 2 3 | byte[] bytes = message.getPacket();InputStream inputStream = new ByteArrayInputStream(bytes);MultipartFile file = new MockMultipartFile(ContentType.APPLICATION_OCTET_STREAM.toString(), inputStream); |
MultipartFile转化为byte数组
1 | byte[] bytes= file.getBytes(); |
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