我從 GitHub 下載了示例代碼并修改了 ReadNodeExample.java，以確保我可以連接到 OPC 服務器（不是 Milo，它是基于 C# 的 OPC 服務器）。我能夠驗證示例代碼是否能夠通過修改從我的服務器讀取/寫入/呼叫節點。
然后我將我認為需要的東西重新實作到我的實際專案中，但我可能會遺漏一些東西，因為我無法在這個專案下連接并收到以下錯誤：
java.lang.NoSuchMethodError: 'io.netty.buffer.ByteBuf io.netty.buffer.ByteBuf.writeMediumLE(int)'
此錯誤發生在 ClientExampleRunner.run() 中，同時運行 createClient()
我仍然可以運行示例專案并仍然連接。
這是我的 pom.xml： org.milo 添加到末尾附近，我添加了從示例中添加的內容（包括 ch.qos.logback 和 jetbrains）。然后添加了 io.netty 認為它會有所幫助，但仍然有同樣的錯誤。
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.companyname</groupId>
<artifactId>companyname-backend-final</artifactId>
<packaging>jar</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>companyname-backend-final</name>
<build>
<finalName>jerseyJetty</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.5.1</version>
<inherited>true</inherited>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<!-- make the jar file -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>3.0.0</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>package org.companyname_backend_final.Main</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.flywaydb</groupId>
<artifactId>flyway-maven-plugin</artifactId>
<version>4.0.3</version>
</plugin>
</plugins>
</build>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.glassfish.jersey</groupId>
<artifactId>jersey-bom</artifactId>
<version>${jersey.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet-core</artifactId>
<!-- use the following artifactId if you don't need servlet 2.x compatibility -->
<!--artifactId>jersey-container-servlet</artifactId -->
</dependency>
<!--<dependency> <groupId>org.xerial</groupId> <artifactId>sqlite-jdbc</artifactId>
<version>3.30.1</version> </dependency> -->
<!-- https://mvnrepository.com/artifact/io.github.willena/sqlite-jdbc -->
<dependency>
<groupId>io.github.willena</groupId>
<artifactId>sqlite-jdbc</artifactId>
<version>3.31.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.json/json -->
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20180813</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-moxy</artifactId>
</dependency>
<!-- embedded jetty -->
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-jetty-http</artifactId>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-util</artifactId>
<version>9.4.0.v20161208</version>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-servlet</artifactId>
<version>9.4.0.v20161208</version>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-server</artifactId>
<version>9.4.0.v20161208</version>
</dependency>
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>org.eclipse.persistence.moxy</artifactId>
<version>2.6.0</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.inject</groupId>
<artifactId>jersey-hk2</artifactId>
</dependency>
<!-- netty websocket -->
<dependency>
<groupId>com.corundumstudio.socketio</groupId>
<artifactId>netty-socketio</artifactId>
<version>1.7.7</version>
</dependency>
<!-- netty http -->
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-netty-http</artifactId>
</dependency>
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<version>2.4.3</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mindrot/jbcrypt -->
<dependency>
<groupId>org.mindrot</groupId>
<artifactId>jbcrypt</artifactId>
<version>0.4</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-nop -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-nop</artifactId>
<version>1.7.26</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/com.google.code.gson/gson -->
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.3.1</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-servlet</artifactId>
<version>1.19.4</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-json</artifactId>
<version>1.19.4</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.25</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-jdk14</artifactId>
<version>1.7.25</version>
</dependency>
<dependency>
<groupId>org.flywaydb</groupId>
<artifactId>flyway-core</artifactId>
<version>6.2.1</version>
</dependency>
<dependency>
<groupId>net.sourceforge.jexcelapi</groupId>
<artifactId>jxl</artifactId>
<version>2.6.12</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>4.1.2</version>
</dependency>
<dependency>
<groupId>com.sun.jersey.contribs</groupId>
<artifactId>jersey-multipart</artifactId>
<version>1.9</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.eclipse.jgit/org.eclipse.jgit -->
<dependency>
<groupId>org.eclipse.jgit</groupId>
<artifactId>org.eclipse.jgit</artifactId>
<version>5.8.1.202007141445-r</version>
</dependency>
<dependency>
<groupId>com.digitalpetri.netty</groupId>
<artifactId>netty-channel-fsm</artifactId>
<version>0.5</version>
<exclusions>
<exclusion>
<groupId>com.digitalpetri.fsm</groupId>
<artifactId>strict-machine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty-codec-http</artifactId>
<version>4.1.70.Final</version>
</dependency>
<dependency>
<groupId>org.eclipse.milo</groupId>
<artifactId>sdk-client</artifactId>
<version>0.6.4</version>
</dependency>
<dependency>
<groupId>org.eclipse.milo</groupId>
<artifactId>dictionary-reader</artifactId>
<version>0.6.4</version>
</dependency>
<dependency>
<groupId>org.eclipse.milo</groupId>
<artifactId>server-examples</artifactId>
<version>0.6.4</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.1.7</version>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.jetbrains</groupId>
<artifactId>annotations</artifactId>
<version>22.0.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
<properties>
<jersey.version>2.26</jersey.version>
<jetty.version>9.4.7.v20170914</jetty.version>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<tomcat.version>8.0.28</tomcat.version>
</properties>
</project>
我對 KeyStoreLoader/ClientExampleRunner 的修改。我修改了名稱以匹配我的應用程式（即使在示例中），但最顯著的變化是我動態決議了機器的名稱
String hostName = InetAddress.getLocalHost().getHostName();
...
SelfSignedCertificateBuilder builder = new SelfSignedCertificateBuilder(keyPair)
.setCommonName("...")
.setOrganization("...")
.setOrganizationalUnit("eng")
.setLocalityName("...")
.setStateName("...")
.setCountryCode("...")
.setApplicationUri("urn:" hostName ":OpcServer")
.addDnsName("localhost")
.addIpAddress("127.0.0.1");
在 ClientExample 中，我只更改了 EndpointUrl。
uj5u.com熱心網友回復：
看來您的實際專案在其類路徑的某處有舊版本的 Netty。
ByteBuf::writeMediumLE（以及所有其他LE后綴的ByteBuf方法）是在 Netty 4.1 中引入的。
轉載請註明出處，本文鏈接：https://www.uj5u.com/caozuo/446962.html