The Java client of Ethernet square uses __java

The preparation has been installed the Ethernet square client or the etheric square cluster installation JDK8 development environment, WEB3J need in the Java 8 environment to run the introduction jar package

<dependency>
  <groupId>org.web3j</groupId>
  <artifactId>core</artifactId>
  <version>2.2.1</version>
</dependency>

Connect the Ethernet square clientUsing the WEB3J API connection

public class Web3jclient {
    private static String IP = "HTTP://IP address: 8545/";
    Private Web3jclient () {}
    private volatile static web3j web3j;
    public static web3j Getclient () {
        if (web3j==null) {
            synchronized (web3jclient.class) {
                if (web3j==null) {
                    web3j = web3j.build (new Httpservice (IP));
                }
            }
        Return web3j
    }
}

Using the Parity API connection

public class Parityclient {
    private static String IP = "HTTP://IP address: 8545/";
    Private Parityclient () {}
    private static class clientholder{
        private static final Parity Parity = Parity.build ( New Httpservice (IP));
    public static final  Parity getparity () {return
        clientholder.parity
    }
}

Account OperationCreate Account Pojo

public class AccountInfo {
    private String userName;
    Private String phone;
    Private String address;
    Private String School;
    Public String GetUserName () {return
        userName;
    }
    public void Setusername (String userName) {
        this.username = userName;
    }
    Public String Getphone () {return
        phone;
    }
    public void Setphone (String phone) {
        this.phone = phone;
    }
    Public String getaddress () {return address
        ;
    }
    public void setaddress (String address) {
        this.address = address;
    }
    Public String Getschool () {return
        school;
    }
    public void Setschool (String school) {
        this.school = school;
    }
}

Account related Operations

public class Account {private static Parity Parity = Parityclient.getparity ();
    private static web3j web3j = Web3jclient.getclient ();
     /** * "Life *" like this * "like" * Also * It's not the "Same" with you @Author LZH * */Public list<string> getaccountlist () {try{return parity.personallistaccounts
        (). Send (). Getaccountids ();
        }catch (Exception e) {e.printstacktrace ();
    return null; public string CreateAccount (string accountname,string password,accountinfo accountinfo) {try {N
            Ewaccountidentifier newaccountidentifier = parity.personalnewaccount (password). Send ();
                if (newaccountidentifier!=null) {String AccountId = Newaccountidentifier.getaccountid ();
                Parity.personalsetaccountname (Accountid,accountname);
  map<string,object> account = new hashmap<string,object> ();              Account.put (Accountid,accountinfo);
                Parity.personalsetaccountmeta (Accountid,account);
            return accountid;
        } catch (Exception e) {e.printstacktrace ();
    return null; Public Personalaccountsinfo.accountsinfo Getaccountinfo (String accountid) {try{personalaccounts
            Info personalaccountsinfo = Parity.personalaccountsinfo (). Send ();
        Return Personalaccountsinfo.getaccountsinfo (). get (AccountId);
        }catch (Exception e) {e.printstacktrace ();
    return null; Public BigInteger getbalance (String accountid) {try {defaultblockparameter Defaultblockparamete
            R = new Defaultblockparameternumber (58);
            Ethgetbalance ethgetbalance = parity.ethgetbalance (accountid,defaultblockparameter). Send ();
            if (ethgetbalance!=null) {return ethgetbalance.getbalance ();
    }    }catch (Exception e) {e.printstacktrace ();
    return null; }
}

Account Test

public class Accounttest {public static void main (String args[]) {getbalance ();
        public static void GetBalance () {Account account = new account ();
        BigInteger ba = account.getbalance ("0xcee1086eabd4cac10f6658eeffcdc66ad7565450");
    System.out.print (BA);
        public static void Queryaccount () {Account account = new account ();
        list<string> accounts = account.getaccountlist ();
        for (String accountid:accounts) {System.out.println (accountid);
            } public void CreateAccount () {Account account = new account ();
            AccountInfo accountinfo = new AccountInfo ();
            Accountinfo.setphone ("229787499");
            Accountinfo.setaddress ("World Ning Mansion");
            Accountinfo.setschool ("Buaa");
            Accountinfo.setusername ("Lzh");
            String AccountId = Account.createaccount ("Lzh", "123456", AccountInfo);
SYSTEM.OUT.PRINTLN ("Registered account success:" +accountid);  //      Personalaccountsinfo.accountsinfo accountsinfo = Account.getaccountinfo ("
0xad7bbca86e02e503076b06931e05938e51e49fb9 ");
    System.out.println (Accountsinfo.tostring ()); }
}

Transaction Operations

public class Trade {private static final Logger Logger = Loggerfactory.getlogger (Trade.class);
    private static BigInteger nonce = new BigInteger ("0");
    private static BigInteger Gasprice = new BigInteger ("1");
    private static BigInteger Gaslimit = new BigInteger ("50");
    Private Parity Parity = Parityclient.getparity (); public boolean trasfer (String accountid,string passsword,string toaccountid, BigDecimal amount) {Transaction tra
        Nsaction = Transaction.createethertransaction (Accountid,null,null,null,toaccountid,amount.tobiginteger ()); try{ethsendtransaction ethsendtransaction =parity.personalsignandsendtransaction (Transaction,passsword). Send (
            );
                if (ethsendtransaction!=null) {String Tradehash = Ethsendtransaction.gettransactionhash ();
            Logger.info ("account: [{}] Transfer to account: [{}], transaction hash:[{}]", Accountid,toaccountid,tradehash); }}catch (Exception e) {logger.error ("account: [{}] transaction failed!",ACCOUNTID,E);
    return false; }
}

Trading Test

public class Tradetest {public
    static void Main (String args[]) {
        Trade Trade = new Trade ();
        Trade.trasfer ("Hash code for Account A", "abc123", "hash code for Account B", new BigDecimal);
    }

reference materialsWEB3J Document WEB3J Code