java file ip_java实现ipfs文件的上传和下载

1.引入所需要的依赖

jitpack.io

https://jitpack.io

com.github.ipfs

java-ipfs-api

v1.2.2

2.直接上代码

static IPFS ipfs = new IPFS("/ip4/192.168.1.111/tcp/5001");//ipfs的服务器地址和端口

public static String upload(String filePathName) throws IOException {

//filePathName指的是文件的上传路径+文件名，如D:/1.png

NamedStreamable.FileWrapper file = new NamedStreamable.FileWrapper(new File(filePathName));

MerkleNode addResult = ipfs.add(file).get(0);

return addResult.hash.toString();

}

public static void download(String filePathName,String hash) throws IOException {

Multihash filePointer = Multihash.fromBase58(hash);

byte[] data = ipfs.cat(filePointer);

if(data != null){

File file  = new File(filePathName);

if(file.exists()){

file.delete();

}

FileOutputStream fos = new FileOutputStream(file);

fos.write(data,0,data.length);

fos.flush();

fos.close();

}

}