java使用JSON-RPC进行BTC、LTC钱包开发

1、首先在本地安装BTC（LTC）钱包，安装包下载地址。

2、在数据文件夹中新建bitcoin.conf（litecoin.conf），默认数据文件夹位置在 C:\Users\Administrator.PC-20170606QNRN\AppData\Roaming\BitCoin

3、打开新建的配置文件，输入以下内容

rpcuser=userrpc
rpcpassword=userpassword
rpcallowip=127.0.0.1
rpcport=61315
server=1

4、打开钱包应用程序，通过cmd命令：netstat -ano|findstr "61315" 

由此可见此端口已打开。

5、新建JAVA工程，创建两个类：CoinUtils.java，Constants.java

     添加MAVEN依赖

    <dependency>  
        <groupId>com.github.briandilley.jsonrpc4j</groupId>  
        <artifactId>jsonrpc4j</artifactId>  
        <version>1.1</version>  
    </dependency>

6、代码如下

package com.ant.wallet;

public class Constants {
	public static String RPC_USER = "userrpc";
	public static String RPC_PASSWORD = "userpassword";
	public static String RPC_ALLOWIP = "127.0.0.1";
	public static String RPC_PORT = "61315";
}

package com.ant.wallet;

import java.net.URL;
import java.util.HashMap;
import java.util.Map;


import com.googlecode.jsonrpc4j.Base64;
import com.googlecode.jsonrpc4j.JsonRpcHttpClient;

public class CoinUtils {

	
	private static CoinUtils instance;
	private static void init() throws Throwable {
		if(null == instance){
			instance = new CoinUtils();
		}
	}

	private JsonRpcHttpClient client;
	public CoinUtils() throws Throwable{
		// 身份认证
		String cred = Base64.encodeBytes((Constants.RPC_USER + ":" + Constants.RPC_PASSWORD).getBytes());
		Map<String, String> headers = new HashMap<String, String>(1);
		headers.put("Authorization", "Basic " + cred);
		client = new JsonRpcHttpClient(new URL("http://"+Constants.RPC_ALLOWIP+":"+Constants.RPC_PORT), headers);
	}


	public static CoinUtils getInstance() throws Throwable {
		init();
		return instance;
	}

	
	/**
	 * 验证地址是否存在
	 * @param address
	 * @return
	 * @throws Throwable
	 */
	public String validateaddress(String address)throws Throwable{
		return  (String) client.invoke("validateaddress", new Object[] {address}, Object.class).toString();
	}
	

	/**
	 * 如果钱包加密需要临时解锁钱包
	 * @param password
	 * @param time
	 * @return
	 * @throws Throwable
	 */
	public String walletpassphase(String password,int time)throws Throwable{
		return  (String) client.invoke("walletpassphase", new Object[] {password,time}, Object.class).toString();
	}
	
	/**
	 * 转账到制定的账户中
	 * @param address
	 * @param amount
	 * @return
	 * @throws Throwable
	 */
	public String sendtoaddress(String address,double amount)throws Throwable{
		return  (String) client.invoke("sendtoaddress", new Object[] {address,amount}, Object.class).toString();
	}
	
	/**
	 * 查询账户下的交易记录
	 * @param account
	 * @param count
	 * @param offset
	 * @return
	 * @throws Throwable
	 */
	public String listtransactions(String account, int count ,int offset )throws Throwable{
		return  (String) client.invoke("listtransactions", new Object[] {account,count,offset}, Object.class).toString();
	}
	
	/**
	 * 获取地址下未花费的币量
	 * @param account
	 * @param count
	 * @param offset
	 * @return
	 * @throws Throwable
	 */
	public String listunspent( int minconf ,int maxconf ,String address)throws Throwable{
		String[] addresss= new String[]{address};
		return  (String) client.invoke("listunspent", new Object[] {minconf,maxconf,addresss}, Object.class).toString();
	}
	
	/**
	 * 生成新的接收地址
	 * @return
	 * @throws Throwable
	 */
	public String getNewaddress() throws Throwable{
		return  (String) client.invoke("getnewaddress", new Object[] {}, Object.class).toString();
	}
	
	/**
	 * 获取钱包信息
	 * @return
	 * @throws Throwable
	 */
	public String getInfo() throws Throwable{
		return  client.invoke("getinfo", new Object[] {}, Object.class).toString();
	}
	
}

这样就实现了使用java代码与钱包进行通信。

以上列举了几个常用的方法，其他方法详见：这里