最近以太坊的分叉，新增了一些字段，原来使用的是老版本 web3j-spring-boot-starter
<groupId>org.web3j</groupId>
<artifactId>web3j-spring-boot-starter</artifactId>
<version>1.6.0</version>
现在不得不更新web3j到最新版本包4.8.7，获取一些新的字段信息。
但是由于web3j的版本和spark.2.4.8的版本中okhttp3一直有冲突。
如果是开发spring项目，倒是可以正常使用，但是spark中okhttp3的版本要是升级也报错，最后查到如下方法，可以解决。
就是通过打包插件重新打包后修改包名解决，所以该方法也可以用于类似不兼容情况。
1. 新建项目myokhttp，pom文件设置如下：
（这里使用插件maven-shade-plugin的relocation来重新更新包名，不需要写任何程序，只需要添加依赖）
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>my_squareup.okhttp3</groupId>
<artifactId>myokhttp</artifactId>
<version>1.0.0</version>
<properties>
<okhttp.version>4.9.1</okhttp.version>
</properties>
<dependencies>
<dependency>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>okhttp</artifactId>
<version>${okhttp.version}</version>
</dependency>
<dependency>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>logging-interceptor</artifactId>
<version>${okhttp.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.2.4</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<relocations>
<relocation>
<pattern>okhttp3</pattern>
<shadedPattern>myokhttp3</shadedPattern>
</relocation>
</relocations>
<filters>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/maven/**</exclude>
</excludes>
</filter>
</filters>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
2. 打包程序后生成myokhttp-1.0.0.jar包文件，使用jd-gui.exe反编译查看，包名已经修改为myokhttp3开头。
3. 将包更新到我们的maven仓库中。
@echo off set jarFilePath=D:\tool\batchMaven\jar\myokhttp-1.0.0.jar set groupId=my_squareup.okhttp3 set artifactId=myokhttp set version=1.0.0 set s=mvn install:install-file -Dfile=%jarFilePath% -DgroupId=%groupId% -DartifactId=%artifactId% -Dversion=%version% -Dpackaging=jar echo %s% call %s% echo 执行完毕 pause
4. 然后在需要的项目中将web3j中的okhttp3包屏蔽，然后添加我们自定义的包的依赖。
<dependency>
<groupId>org.web3j</groupId>
<artifactId>core</artifactId>
<version>4.8.7</version>
<exclusions>
<exclusion>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>okhttp</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>my_squareup.okhttp3</groupId>
<artifactId>myokhttp</artifactId>
<version>1.0.0</version>
</dependency>
5. 修改项目中使用到的okhttp3的地方。
1）这里还需要重新写一个HttpServer，从web3j中直接拷贝过来，把引用到okhttp3的地方修改为myokhttp3
/*
* Copyright 2019 Web3 Labs Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
* an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package com.my.blockchain.http;
import myokhttp3.*;
import myokhttp3.logging.HttpLoggingInterceptor;
import okio.Buffer;
import okio.BufferedSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.web3j.protocol.Service;
import org.web3j.protocol.exceptions.ClientConnectionException;
import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import static myokhttp3.ConnectionSpec.CLEARTEXT;
/** HTTP implementation of our services API. */
public class HttpService extends Service {
/** Copied from {@link ConnectionSpec#APPROVED_CIPHER_SUITES}. */
@SuppressWarnings("JavadocReference")
private static final CipherSuite[] INFURA_CIPHER_SUITES =
new CipherSuite[] {
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
CipherSuite.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
CipherSuite.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
CipherSuite.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
CipherSuite.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
// Note that the following cipher suites are all on HTTP/2's bad cipher suites list.
// We'll
// continue to include them until better suites are commonly available. For example,
// none
// of the better cipher suites listed above shipped with Android 4.4 or Java 7.
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_RSA_WITH_AES_128_GCM_SHA256,
CipherSuite.TLS_RSA_WITH_AES_256_GCM_SHA384,
CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_RSA_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_RSA_WITH_3DES_EDE_CBC_SHA,
// Additional INFURA CipherSuites
CipherSuite.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
CipherSuite.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,
CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA256,
CipherSuite.TLS_RSA_WITH_AES_256_CBC_SHA256
};
private static final ConnectionSpec INFURA_CIPHER_SUITE_SPEC =
new ConnectionSpec.Builder(ConnectionSpec.MODERN_TLS)
.cipherSuites(INFURA_CIPHER_SUITES)
.build();
/** The list of {@link ConnectionSpec} instances used by the connection. */
private static final List<ConnectionSpec> CONNECTION_SPEC_LIST =
Arrays.asList(INFURA_CIPHER_SUITE_SPEC, CLEARTEXT);
public static final MediaType JSON_MEDIA_TYPE =
MediaType.parse("application/json; charset=utf-8");
public static final String DEFAULT_URL = "http://localhost:8545/";
private static final Logger log = LoggerFactory.getLogger(HttpService.class);
private OkHttpClient httpClient;
private final String url;
private final boolean includeRawResponse;
private HashMap<String, String> headers = new HashMap<>();
public HttpService(String url, OkHttpClient httpClient, boolean includeRawResponses) {
super(includeRawResponses);
this.url = url;
this.httpClient = httpClient;
this.includeRawResponse = includeRawResponses;
}
public HttpService(OkHttpClient httpClient, boolean includeRawResponses) {
this(DEFAULT_URL, httpClient, includeRawResponses);
}
public HttpService(String url, OkHttpClient httpClient) {
this(url, httpClient, false);
}
public HttpService(String url) {
this(url, createOkHttpClient());
}
public HttpService(String url, boolean includeRawResponse) {
this(url, createOkHttpClient(), includeRawResponse);
}
public HttpService(OkHttpClient httpClient) {
this(DEFAULT_URL, httpClient);
}
public HttpService(boolean includeRawResponse) {
this(DEFAULT_URL, includeRawResponse);
}
public HttpService() {
this(DEFAULT_URL);
}
public static OkHttpClient.Builder getOkHttpClientBuilder() {
final OkHttpClient.Builder builder =
new OkHttpClient.Builder().connectionSpecs(CONNECTION_SPEC_LIST);
configureLogging(builder);
return builder;
}
private static OkHttpClient createOkHttpClient() {
return getOkHttpClientBuilder().build();
}
private static void configureLogging(OkHttpClient.Builder builder) {
if (log.isDebugEnabled()) {
HttpLoggingInterceptor logging = new HttpLoggingInterceptor(log::debug);
logging.setLevel(HttpLoggingInterceptor.Level.BODY);
builder.addInterceptor(logging);
}
}
@Override
protected InputStream performIO(String request) throws IOException {
RequestBody requestBody = RequestBody.create(request, JSON_MEDIA_TYPE);
Headers headers = buildHeaders();
myokhttp3.Request httpRequest =
new myokhttp3.Request.Builder().url(url).headers(headers).post(requestBody).build();
try (myokhttp3.Response response = httpClient.newCall(httpRequest).execute()) {
processHeaders(response.headers());
ResponseBody responseBody = response.body();
if (response.isSuccessful()) {
if (responseBody != null) {
return buildInputStream(responseBody);
} else {
return null;
}
} else {
int code = response.code();
String text = responseBody == null ? "N/A" : responseBody.string();
throw new ClientConnectionException(
"Invalid response received: " + code + "; " + text);
}
}
}
protected void processHeaders(Headers headers) {
// Default implementation is empty
}
private InputStream buildInputStream(ResponseBody responseBody) throws IOException {
if (includeRawResponse) {
// we have to buffer the entire input payload, so that after processing
// it can be re-read and used to populate the rawResponse field.
BufferedSource source = responseBody.source();
source.request(Long.MAX_VALUE); // Buffer the entire body
Buffer buffer = source.getBuffer();
long size = buffer.size();
if (size > Integer.MAX_VALUE) {
throw new UnsupportedOperationException(
"Non-integer input buffer size specified: " + size);
}
int bufferSize = (int) size;
InputStream inputStream = responseBody.byteStream();
BufferedInputStream bufferedinputStream =
new BufferedInputStream(inputStream, bufferSize);
bufferedinputStream.mark(inputStream.available());
return bufferedinputStream;
} else {
return new ByteArrayInputStream(responseBody.bytes());
}
}
private Headers buildHeaders() {
return Headers.of(headers);
}
public void addHeader(String key, String value) {
headers.put(key, value);
}
public void addHeaders(Map<String, String> headersToAdd) {
headers.putAll(headersToAdd);
}
public HashMap<String, String> getHeaders() {
return headers;
}
public String getUrl() {
return url;
}
@Override
public void close() throws IOException {}
}
2）扩展web3j，新建Web3jExtend (由于web3j的查询功能有限，还需要查询额外的接口，这里做个扩展)
/**
* @Author: KingWang
* @Date: 2021/8/16
* @Desc: 补充web3j没有的接口功能
**/
public class Web3jExtend extends JsonRpc2_0Web3j implements Web3j {
public Web3jExtend(Web3jService web3jService) {
super(web3jService);
}
//这里写扩展的功能
public Request<?, NetVersion> test() {
return new Request<>(
"my_test", Collections.<String>emptyList(), web3jService, NetVersion.class);
}
}
3）建立web3j的工具类,工具类中使用的都是myokhttp类 (scala)
/**
* @Author: KingWang
* @Date: 2021/7/19
* @Desc: web3j的工具类
**/
object Web3jUtil {
def getWeb3j:Web3jExtend = {
val pool: ConnectionPool = new ConnectionPool(500, 5L, TimeUnit.MINUTES)
val httpClient = new OkHttpClient().newBuilder().connectionPool(pool).build()
val httpService = new HttpService(APIConstant.ethClientAddress, httpClient, false)
new Web3jExtend(httpService)
}
}
6. 测试
def getBlock(blockNumber:String) = {
val web3j = Web3jUtil.getWeb3j
val defaultBlockParameter = new DefaultBlockParameterNumber(new BigInteger(blockNumber))
val ethBlock =web3j.ethGetBlockByNumber(defaultBlockParameter,true).send()
val block = ethBlock.getBlock
println(JSON.toJSONString(block,SerializerFeature.WriteMapNullValue))
}