咸鱼

/**
    * 以太坊交易
    * @throws ExecutionException
    * @throws InterruptedException
    */
   public void testTransferEther() throws ExecutionException, InterruptedException {

       EthCoinbase coinbase = web3j.ethCoinbase().sendAsync().get();

       //拨款地址，这里用coinbase账号的地址
       final String formAddress = coinbase.getAddress();
       //拨款账号的Key，Key是账号的身份验证，很重要
       final String formKey = "58e7f34b59a828d1dc37a97a921b55de0cb8cedea91b1e09b490f39264b151ce";
       //收款地址
       final String toAddress = "0x9958eC47C8286DC89F5CbCbD842458bD43540a7D";

       EthGetTransactionCount ethGetTransactionCount = web3j.ethGetTransactionCount(
               formAddress, DefaultBlockParameterName.LATEST).sendAsync().get();
       BigInteger nonce = ethGetTransactionCount.getTransactionCount();

       //转0.5个以太坊币
       BigInteger value = Convert.toWei("0.5", Convert.Unit.ETHER).toBigInteger();
       Log.e(TAG, "transaction nonce: " + nonce );

       RawTransaction rawTransaction = RawTransaction.createEtherTransaction(
                        nonce, GAS_PRICE, GAS_LIMIT, toAddress, value);
       //签名
       Credentials credentials = Credentials.create(formKey);
       byte[] signedMessage = TransactionEncoder.signMessage(rawTransaction, credentials);
       String hexValue = Numeric.toHexString(signedMessage);
       //交易
       EthSendTransaction ethSendTransaction = web3j.ethSendRawTransaction(hexValue).sendAsync().get();
       Log.e(TAG, "transactionHash: " + ethSendTransaction.getTransactionHash());
   }

package org.web3j.protocol.core.methods.response;

import org.web3j.protocol.core.Response;

/**
 * eth_coinbase.
 */
public class EthCoinbase extends Response<String> {
    public String getAddress() {
        return getResult();
    }
}

package org.web3j.protocol.core;

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;

/**
 * Our common JSON-RPC response type.
 *
 * @param <T> the object type contained within the response
 */
@JsonIgnoreProperties(ignoreUnknown = true)
public class Response<T> {
    private long id;
    private String jsonrpc;
    private T result;
    private Error error;
    private String rawResponse;

    public Response() {
    }

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public String getJsonrpc() {
        return jsonrpc;
    }

    public void setJsonrpc(String jsonrpc) {
        this.jsonrpc = jsonrpc;
    }

    public T getResult() {
        return result;
    }

    public void setResult(T result) {
        this.result = result;
    }

    public Error getError() {
        return error;
    }

    public void setError(Error error) {
        this.error = error;
    }

    public boolean hasError() {
        return error != null;
    }

    public String getRawResponse() {
        return rawResponse;
    }

    public void setRawResponse(String rawResponse) {
        this.rawResponse = rawResponse;
    }

    public static class Error {
        private int code;
        private String message;
        private String data;

        public Error() {
        }

        public Error(int code, String message) {
            this.code = code;
            this.message = message;
        }

        public int getCode() {
            return code;
        }

        public void setCode(int code) {
            this.code = code;
        }

        public String getMessage() {
            return message;
        }

        public void setMessage(String message) {
            this.message = message;
        }

        public String getData() {
            return data;
        }

        public void setData(String data) {
            this.data = data;
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) {
                return true;
            }
            if (!(o instanceof Error)) {
                return false;
            }

            Error error = (Error) o;

            if (getCode() != error.getCode()) {
                return false;
            }
            if (getMessage() != null
                    ? !getMessage().equals(error.getMessage()) : error.getMessage() != null) {
                return false;
            }
            return getData() != null ? getData().equals(error.getData()) : error.getData() == null;
        }

        @Override
        public int hashCode() {
            int result = getCode();
            result = 31 * result + (getMessage() != null ? getMessage().hashCode() : 0);
            result = 31 * result + (getData() != null ? getData().hashCode() : 0);
            return result;
        }
    }
}

@RequestMapping("/test/multipart")
@ResponseBody
public String handleFileUpload(@RequestPart("file")MultipartFile file,
							 @RequestPart("describe")String describe){

	System.out.println("describe="+describe);
	if(!file.isEmpty()){

		try {
			BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(new File(file.getOriginalFilename())));
			out.write(file.getBytes());
			out.flush();
			out.close();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
			return e.getMessage();

		} catch (IOException e) {
			e.printStackTrace();
			return e.getMessage();
		}
		return"OK";
	}else{
		return"file is null";
	}
}

@PostMapping(value = "/upload")
public String upload(@RequestBody byte[] body){

	return "PONG:"+body.length;
}

javax.net.ssl.SSLException: Connection closed by peer