一、导入依赖
Jar包方式
com.github.ipfs java-ipfs-api1.3.3 com.github.multiformats java-multihashv1.3.0 com.github.multiformats java-multibasev1.1.0 com.github.multiformats java-multiaddrv1.4.1 com.github.ipld java-cid1.3.3
Maven方式
jitpack.io https://jitpack.io com.github.ipfs java-ipfs-apiv1.3.3
二、代码实例
@Component public class IPFSUtil { public String upload(IPFS ipfs, String fileName) throws IOException { NamedStreamable.FileWrapper file = new NamedStreamable.FileWrapper(new File(fileName)); MerkleNode addResult = ipfs.add(file).get(0); return addResult.hash.toString(); } public String upload(IPFS ipfs, byte[] data) throws IOException { NamedStreamable.ByteArrayWrapper file = new NamedStreamable.ByteArrayWrapper(data); MerkleNode addResult = ipfs.add(file).get(0); return addResult.hash.toString(); } public byte[] download(IPFS ipfs, String hash) { byte[] data = null; try { data = ipfs.cat(Multihash.frombase58(hash)); } catch (IOException e) { e.printStackTrace(); } return data; } public void download(IPFS ipfs, String hash, String destFile) { byte[] data = null; try { data = ipfs.cat(Multihash.frombase58(hash)); } catch (IOException e) { e.printStackTrace(); } if (data != null && data.length > 0) { File file = new File(destFile); if (file.exists()) { file.delete(); } FileOutputStream fos = null; try { fos = new FileOutputStream(file); fos.write(data); fos.flush(); } catch (IOException e) { e.printStackTrace(); } finally { try { fos.close(); } catch (IOException e) { e.printStackTrace(); } } } } } @RunWith(SpringJUnit4ClassRunner.class) @SpringBootTest(classes = {Application.class}) @Slf4j public class IPFSTest { // ipfs的服务器地址和端口 private IPFS ipfs = new IPFS("/ip4/127.0.0.1/tcp/5001"); @Autowired private IPFSUtil ipfsUtil; @Test public void testIPFSUpload() throws IOException { // filePath 指的是文件的上传路径+文件名,如D:/1.png String filePath = "D:\kyrie.png"; String cid = ipfsUtil.upload(ipfs, filePath); } @Test public void testIPFSDownload() throws IOException { String cid = "BmxJxgEUoQ7avSXC7BbazTCSqMmySBrIPmSX7ipWCBcLVN1"; String destFile = "D:\irving.jpg"; ipfsUtil.download(ipfs, cid, destFile); } }
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