java通过web3j获取ETH交易明细

如果我们想在项目中获得用户ETH如何做交易细节？有两种方式:

1、直接获取ETH最新块的交易细节。

2.通过块获取用户的交易细节。

废话不多说，直接贴代码看

package com.example.demo.web3jLog;  import org.springframework.stereotype.Component; import org.web3j.protocol.Web3j; import org.web3j.protocol.core.DefaultBlockParameter; import org.web3j.protocol.core.DefaultBlockParameterName; import org.web3j.protocol.core.methods.request.EthFilter; import org.web3j.protocol.core.methods.response.*; import org.web3j.protocol.core.methods.response.Transaction; import org.web3j.protocol.http.HttpService; import org.web3j.utils.Convert;  import java.io.IOException; import java.math.BigDecimal; import java.math.BigInteger; import java.util.Arrays; import java.util.List; import java.util.Optional; import java.util.concurrent.ExecutionException;  @Component public class ETHWeb3jTest {      /**      * 完成web3的初始化   区块链节点地址介绍以下地址      */     public static Web3j web3j = Web3j.build(new HttpService("https://org:8545/"));      public static void main(String[] args) {         BigInteger latestBlock;         try {             //获取ETH最新区块号             latestBlock = web3j.ethBlockNumber().send().getBlockNumber();             ///通过区块号获得交易             List<EthBlock.TransactionResult> ethGetBlance = web3j.ethGetBlockByNumber(DefaultBlockParameter.valueOf(latestBlock.subtract(new BigInteger("3"))),true).send().getBlock().getTransactions();             //通过hash获取交易             Optional<Transaction> transactions = web3j.ethGetTransactionByHash("hash").send().getTransaction();         } catch (IOException e) {             e.printStackTrace();         }         List<EthBlock.TransactionResult> txs = null;         try {             //也可以直接获得最新交易             txs = web3j.ethGetBlockByNumber(DefaultBlockParameterName.LATEST, true).send().getBlock().getTransactions();         } catch (IOException e) {             e.printStackTrace();         }         txs.forEach(tx -> {             EthBlock.TransactionObject transaction = (EthBlock.TransactionObject) tx.get();             System.out.println(transaction.getFrom());         });     }  }  

以下是项目的相关依赖:

<dependency>     <groupId>org.web3j</groupId>     <artifactId>core</artifactId>     <version>3.4.0</version> </dependency>  <dependency>     <groupId>com.google.guava</groupId>     <artifactId>guava</artifactId>     <version>29.0-jre</version> </dependency> <dependency>     <groupId>org.bitcoinj</groupId>     <artifactId>bitcoinj-core</artifactId>     <version>0.15.5</version> </dependency>