java-ipfs-api.jar的食用方法

谁借莪１个温暖的怀抱￠ 2022-04-18 01:47 382阅读 0赞

# 引入java-ipfs-api.jar #

## 从仓库引入 ##

在pom.xml中添加仓库

<repositories>
    		
            <repository>
                <id>public</id>
                <name>aliyun nexus</name>
                <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
                <releases>
                    <enabled>true</enabled>
                </releases>
            </repository>
            
            <repository>
                <id>jitpack.io</id>
                <url>https://jitpack.io</url>
            </repository>
        </repositories>

<dependency>
                <groupId>com.github.ipfs</groupId>
                <artifactId>java-ipfs-api</artifactId>
                <version>v1.2.2</version>
            </dependency>

## 源码打包（推荐） ##

git clone https://github.com/ipfs/java-ipfs-api.git

mvn clean install -Dmaven.test.skip=true

# 启动IPFS #

还没写，后补

# 食用方法（v1.2.2） #

## IPFSUtil.java ##

import io.ipfs.api.IPFS;
    import io.ipfs.api.MerkleNode;
    import io.ipfs.api.NamedStreamable;
    import io.ipfs.multihash.Multihash;
    
    import java.io.File;
    import java.io.IOException;
    
    public class IPFSUtil { 
       private static IPFS ipfs = new IPFS("/ip4/127.0.0.1/tcp/5001");
    
       public static String add() throws IOException { 
           NamedStreamable.FileWrapper file = new NamedStreamable.FileWrapper(new File("C:\\Users\\Administrator\\Desktop", "test.png"));
           MerkleNode addResult = ipfs.add(file).get(0);
           return addResult.hash.toString();
       }
    
       public static String cat(String hash) throws IOException { 
            byte[] data = ipfs.cat(Multihash.fromBase58(hash));
            return new String(data);
       }
    }

## IPFSUtilTest.java ##

import org.junit.Test;
    import java.io.IOException;
    
    public class IPFSUtilTest { 
    
        @Test
        public void testAdd() { 
            try { 
                String hash = IPFSUtil.add();
                System.out.println(hash);
                // QmfGp2pRCs3VidFKEVh6NFdrJ3usfrRDr2KXW9k4t3EfUK
            } catch (IOException e) { 
                e.printStackTrace();
            }
    
        }
    
        @Test
        public void testCat() { 
            try { 
                String data = IPFSUtil.cat("QmfGp2pRCs3VidFKEVh6NFdrJ3usfrRDr2KXW9k4t3EfUK");
                System.out.println(data);
            } catch (IOException e) { 
                e.printStackTrace();
            }
        }
    }

只写了两个简单的测试，其他api后补。add的对象是一个图片，所以cat没什么卵用，上效果图

![效果图][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lpbWNhcnNvbg_size_16_color_FFFFFF_t_70]

ipfs hash为https://ipfs.io/ipfs/QmfGp2pRCs3VidFKEVh6NFdrJ3usfrRDr2KXW9k4t3EfUK

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lpbWNhcnNvbg_size_16_color_FFFFFF_t_70]: /images/20220418/419d0c4a2f7149f086913ed5497dfb42.png