如何使用web3j在ethereum中部署智能契约

Question

我正在学习本教程教程

在契约包装器一节中，我遵循了相同的步骤，但我在这里获得了<#>Working，这是完整的堆栈跟踪

java.lang.RuntimeException: java.lang.NoSuchMethodException: smartcontract.Counter1.(java.lang.String, org.web3j.protocol.Web3j, org.web3j.crypto.Credentials, org.web3j.tx.gas.ContractGasProvider)
    at org.web3j.tx.Contract.deploy(Contract.java:366)
    at org.web3j.tx.Contract.deploy(Contract.java:403)
    at org.web3j.tx.Contract.lambda$deployRemoteCall$5(Contract.java:426)
    at org.web3j.protocol.core.RemoteCall.send(RemoteCall.java:30)
    at smartcontract.CounterDemo.deployContract(CounterDemo.java:37)
    at controllers.SmartContractController$anonfun$counterContractDemo$1.apply(SmartContractController.scala:64)
    at controllers.SmartContractController$anonfun$counterContractDemo$1.apply(SmartContractController.scala:58)

这是我的代码

public static RemoteCall deploy(Web3j web3j, Credentials credentials, BigInteger gasPrice, BigInteger gasLimit) {
        return deployRemoteCall(Counter1.class, web3j, credentials, gasPrice, gasLimit, BINARY, "");
    }

    public static RemoteCall deploy(Web3j web3j, TransactionManager transactionManager, BigInteger gasPrice, BigInteger gasLimit) {
        return deployRemoteCall(Counter1.class, web3j, transactionManager, gasPrice, gasLimit, BINARY, "");
    }

    public static Counter1 load(String contractAddress, Web3j web3j, Credentials credentials, BigInteger gasPrice, BigInteger gasLimit) {
        return new Counter1(contractAddress, web3j, credentials, gasPrice, gasLimit);
    }

    public static Counter1 load(String contractAddress, Web3j web3j, TransactionManager transactionManager, BigInteger gasPrice, BigInteger gasLimit) {
        return new Counter1(contractAddress, web3j, transactionManager, gasPrice, gasLimit);
    }

CounterDemo.java

public class CounterDemo {

    public String deployContract() {
        String deploy = "";
        BigInteger GAS_LIMIT = BigInteger.valueOf(6721975L);
        BigInteger GAS_PRICE = BigInteger.valueOf(20000000000L);
        try {

            Web3j web3j = Web3j.build(new org.web3j.protocol.http.HttpService("http://localhost:8080"));
            Credentials credentials = WalletUtils.loadCredentials("pswd",
                    "path to privatekey/UTC--2018-12-15T12-06-10.************************************1");
            System.out.println("credentails address " + credentials.getAddress());
            Counter1 counter = Counter1.deploy(web3j, credentials, GAS_PRICE,
                    GAS_LIMIT ).send();

            //Counter.deploy(web3j, credentials, GAS_PRICE,GAS_LIMIT);
            deploy = counter.getContractAddress();
            System.out.println("address is {}" + deploy);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } // defaults to http://localhost:8545/
        catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return deploy;
    }

}

下面是play控制器操作，我将根据该操作获得一个已部署的契约地址。

def counterContractDemo() = Action {
    val web3j = Web3j.build(new HttpService("http://localhost:8080/"))
    val CounterDemo = new CounterDemo();

    Ok(CounterDemo.deployContract())
  }

我使用的是运行框架2.3.4，并通过了正确数量的参数，以便使用正确的参数

Answer 1

protected Counter1(String contractAddress, Web3j web3j, TransactionManager transactionManager, ContractGasProvider gasProvider) {
    super(BINARY, contractAddress, web3j, transactionManager, gasProvider);
}

如果我记得很好，我就有了这个问题，并通过将它添加到生成的java类中来解决它。