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两种调用方式：fabric-sdk以及fabric-gateway
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导入maven包
<dependency> <groupId>org.hyperledger.fabric</groupId> <artifactId>fabric-gateway-java</artifactId> <version>2.0.0</version> </dependency> -
创建java项目，在resource下创建crypto-config目录，将服务器上/root/go/src/github.com/hyperledger/fabric/scripts/fabric-samples/test-network/organizations目录下的peerOrganizations与ordererOrganizations复制过来
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在resource下创建connection.json，里面的具体参数根据实际内容变更
{ "name": "basic-network", "version": "1.0.0", "dependencies": {}, "client": { "organization": "Org1", "connection": { "timeout": { "peer": { "endorser": "300" }, "orderer": "300" } } }, "channels": { "mychannel": { "orderers": [ "orderer.example.com" ], "peers": { "peer0.org1.example.com": { "endorsingPeer": true, "chaincodeQuery": true, "ledgerQuery": true, "eventSource": true }, "peer0.org2.example.com": { "endorsingPeer": true, "chaincodeQuery": true, "ledgerQuery": true, "eventSource": true } } } }, "organizations": { "Org1": { "mspid": "Org1MSP", "peers": [ "peer0.org1.example.com" ], "certificateAuthorities": [ "ca-org1" ], "adminPrivateKeyPEM": { "path": "src/main/resources/crypto-config/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp/keystore/priv_sk" }, "signedCertPEM": { "path": "src/main/resources/crypto-config/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp/signcerts/Admin@org1.example.com-cert.pem" } }, "Org2": { "mspid": "Org2MSP", "peers": [ "peer0.org2.example.com" ], "certificateAuthorities": [ "ca-org2" ], "adminPrivateKeyPEM": { "path": "src/main/resources/crypto-config/peerOrganizations/org2.example.com/users/Admin@org2.example.com/msp/keystore/priv_sk" }, "signedCertPEM": { "path": "src/main/resources/crypto-config/peerOrganizations/org2.example.com/users/Admin@org2.example.com/msp/signcerts/Admin@org2.example.com-cert.pem" } } }, "orderers": { "orderer.example.com": { "url": "grpcs://192.168.0.99:7050", "mspid": "OrdererMSP", "grpcOptions": { "ssl-target-name-override": "orderer.example.com", "hostnameOverride": "orderer.example.com" }, "tlsCACerts": { "path": "src/main/resources/crypto-config/ordererOrganizations/example.com/orderers/orderer.example.com/tls/ca.crt" }, "adminPrivateKeyPEM": { "path": "src/main/resources/crypto-config/ordererOrganizations/example.com/users/Admin@example.com/msp/keystore/priv_sk" }, "signedCertPEM": { "path": "src/main/resources/crypto-config/ordererOrganizations/example.com/users/Admin@example.com/msp/signcerts/Admin@example.com-cert.pem" } } }, "peers": { "peer0.org1.example.com": { "url": "grpcs://192.168.0.99:7051", "grpcOptions": { "ssl-target-name-override": "peer0.org1.example.com", "hostnameOverride": "peer0.org1.example.com", "request-timeout": 120001 }, "tlsCACerts": { "path": "src/main/resources/crypto-config/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt" } }, "peer0.org2.example.com": { "url": "grpcs://192.168.0.99:9051", "grpcOptions": { "ssl-target-name-override": "peer0.org2.example.com", "hostnameOverride": "peer0.org2.example.com", "request-timeout": 120001 }, "tlsCACerts": { "path": "src/main/resources/crypto-config/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt" } } }, "certificateAuthorities": { "ca-org1": { "url": "https://192.168.0.99:7054", "grpcOptions": { "verify": true }, "tlsCACerts": { "path": "src/main/resources/crypto-config/peerOrganizations/org1.example.com/ca/ca.org1.example.com-cert.pem" }, "registrar": [{ "enrollId": "admin", "enrollSecret": "adminpw" }] }, "ca-org2": { "url": "https://192.168.0.99:8054", "grpcOptions": { "verify": true }, "tlsCACerts": { "path": "src/main/resources/crypto-config/peerOrganizations/org2.example.com/ca/ca.org2.example.com-cert.pem" }, "registrar": [{ "enrollId": "admin", "enrollSecret": "adminpw" }] } }}
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创建fabric.config.properties ，其中的通道名称，链码名称以及私钥路径根据实际情况填写
# 网络配置文件路径 networkConfigPath = src/main/resources/connection.json # 用户证书路径 certificatePath = src/main/resources/crypto-config/peerOrganizations/org1.example.com/users/User1@org1.example.com/msp/signcerts/User1@org1.example.com-cert.pem # 用户私钥路径 privateKeyPath = src/main/resources/crypto-config/peerOrganizations/org1.example.com/users/User1@org1.example.com/msp/keystore/59157e7b19fe2eacad4baca256296e93022c51e5bc0102eec4e0b23f54db85f8_sk # 通道名字 channelName = mychannel # 链码名字 contractName = mylocks -
项目结构如下
-resource --crypto-config ---ordererOrganizations.example.com ---peerOrganizations --connnection.json --fabric.config.properties -
skd调用样例
public class SdkDemo { public static void main(String[] args) { try { //获取fabric.config.properties文件中的相应参数 Properties properties = new Properties(); InputStream inputStream = SdkDemo.class.getResourceAsStream("/fabric.config.properties"); properties.load(inputStream); String networkConfigPath = properties.getProperty("networkConfigPath"); String channelName = properties.getProperty("channelName"); String contractName = properties.getProperty("contractName"); //使用org1中的user1初始化一个网关wallet账户用于连接网络 String certificatePath = properties.getProperty("certificatePath"); X509Certificate certificate = readX509Certificate(Paths.get(certificatePath)); String privateKeyPath = properties.getProperty("privateKeyPath"); PrivateKey privateKey = getPrivateKey(Paths.get(privateKeyPath)); Wallet wallet = Wallets.newInMemoryWallet(); wallet.put("user1", Identities.newX509Identity("Org1MSP", certificate, privateKey)); //根据connection.json 获取Fabric网络连接对象 Gateway.Builder builder = Gateway.createBuilder().identity(wallet, "user1").networkConfig(Paths.get(networkConfigPath)); //连接网关 Gateway gateway = builder.connect(); //获取通道 Network network = gateway.getNetwork(channelName); //获取合约对象 Contract contract = network.getContract(contractName); // Submit transactions that store state to the ledger. byte[] createCarResult = contract.createTransaction("set").submit("123", "我是来测试是否上链的"); System.out.println("====println==============>" + new String(createCarResult, StandardCharsets.UTF_8)); // Evaluate transactions that query state from the ledger. byte[] queryAllCarsResult = contract.evaluateTransaction("get", "123"); System.out.println("==================>" + new String(queryAllCarsResult, StandardCharsets.UTF_8)); } catch (Exception e) { e.printStackTrace(); } } private static X509Certificate readX509Certificate(final Path certificatePath) throws IOException, CertificateException { try (Reader certificateReader = Files.newBufferedReader(certificatePath, StandardCharsets.UTF_8)) { return Identities.readX509Certificate(certificateReader); } } private static PrivateKey getPrivateKey(final Path privateKeyPath) throws IOException, InvalidKeyException, IOException { try (Reader privateKeyReader = Files.newBufferedReader(privateKeyPath, StandardCharsets.UTF_8)) { return Identities.readPrivateKey(privateKeyReader); } }
