Java Maven com.google无法解析为键入

马文是新来的。我使用Maven构建了我的项目，生成一个Protobuf可执行文件，并将源代码生成到我的项目中。我正在使用eclipse并用Java进行编译。我似乎没有正确导入库，因此在通过eclipse查看生成的代码时会出现很多错误

我收到错误Maven com.google无法解析为键入

我看了很多建议，似乎找不到解决这个问题的办法。从我的想法来看，我的构建路径似乎是正确的

<?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>com.henosisknot.com</groupId>
<version>0.1.0</version>
<name>ChatBot-Henosisknot</name>
<url>henosisknot.com</url>
<description>Chatbot for henosisknot.com</description>
<artifactId>Chatbot-Henosisknot</artifactId>
<packaging>pom</packaging>
<profiles>
    <profile>
        <modules>
                <module>com</module>
        </modules>
      </profile>
</profiles>
<organization>
    <name>Henosisknot.com</name> 
 </organization>

<properties>

<!-- protobuf paths -->
<protobuf.input.directory>${project.basedir}/src/main/java/com/proto</protobuf.input.directory>
<protobuf.output.directory>${project.basedir}/src/</protobuf.output.directory>
<project.build.dir>${project.basedir}/build</project.build.dir>

<!-- library versions -->
<build-helper-maven-plugin.version>1.9.1</build-helper-maven-plugin.version>
<maven-antrun-plugin.version>1.8</maven-antrun-plugin.version>
<maven-dependency-plugin.version>2.10</maven-dependency-plugin.version>
<maven-shade-plugin.version>2.4.2</maven-shade-plugin.version>
<os-maven-plugin.version>1.4.1.Final</os-maven-plugin.version>
<protobuf.version>3.0.0</protobuf.version>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>

</properties>


<dependencies>

    <dependency>
        <groupId>com.google.protobuf</groupId>
        <artifactId>protobuf-java</artifactId>
        <version>3.0.0</version>
    </dependency>

</dependencies>


 <build>
    <extensions>
    <!-- provides os.detected.classifier (i.e. linux-x86_64, osx-x86_64) property -->
        <extension>
            <groupId>kr.motd.maven</groupId>
            <artifactId>os-maven-plugin</artifactId>
            <version>${os-maven-plugin.version}</version>
        </extension>
    </extensions>

    <directory>${project.build.dir}/classes</directory>
    <outputDirectory>/users/andor/workspace/Chatbot-Henosisknot/build/classes</outputDirectory>

    <plugins>
        <!-- copy protoc binary into build directory -->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-dependency-plugin</artifactId>
            <version>${maven-dependency-plugin.version}</version>
            <executions>
                <execution>
                    <id>copy-protoc</id>
                    <phase>generate-sources</phase>
                    <goals>
                        <goal>copy</goal>
                    </goals>
                    <configuration>
                        <artifactItems>
                            <artifactItem>
                                <groupId>com.google.protobuf</groupId>
                                <artifactId>protoc</artifactId>
                                <version>${protobuf.version}</version>
                                <classifier>${os.detected.classifier}</classifier>
                                <type>exe</type>
                                <overWrite>true</overWrite>
                                <outputDirectory>${project.build.dir}</outputDirectory>
                            </artifactItem>
                        </artifactItems>
                    </configuration>
                </execution>
            </executions>
        </plugin>
        <!-- compile proto buffer files using copied protoc binary -->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-antrun-plugin</artifactId>
            <version>${maven-antrun-plugin.version}</version>
            <executions>
                <execution>
                    <id>exec-protoc</id>
                    <phase>generate-sources</phase>
                    <configuration>
                        <target>
                            <property name="protoc.filename" value="protoc-${protobuf.version}-${os.detected.classifier}.exe"/>
                            <property name="protoc.filepath" value="${project.build.dir}/${protoc.filename}"/>
                            <chmod file="${protoc.filepath}" perm="ugo+rx"/>
                            <mkdir dir="${protobuf.output.directory}" />
                            <path id="protobuf.input.filepaths.path">
                                <fileset dir="${protobuf.input.directory}">
                                    <include name="**/*.proto"/>
                                </fileset>
                            </path>
                            <pathconvert pathsep=" " property="protobuf.input.filepaths" refid="protobuf.input.filepaths.path"/>
                            <exec executable="${protoc.filepath}" failonerror="true">
                                <arg value="-I"/>
                                <arg value="${protobuf.input.directory}"/>
                                <arg value="--java_out"/>
                                <arg value="${protobuf.output.directory}"/>
                                <arg line="${protobuf.input.filepaths}"/>
                            </exec>
                        </target>
                    </configuration>
                    <goals>
                        <goal>run</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
        <plugin>
        <groupId>org.xolstice.maven.plugins</groupId>
        <artifactId>protobuf-maven-plugin</artifactId>
        <version>0.5.0</version>
        <configuration>
          <protocExecutable>/usr/local/bin/protoc</protocExecutable>
        </configuration>
        <executions>
          <execution>
            <goals>
              <goal>compile</goal>
              <goal>test-compile</goal>
            </goals>
          </execution>
        </executions>
        </plugin>
        <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.0.2</version>
                <configuration>
                    <includes>
                        <include>**/com/**</include>
                    </includes>
                </configuration>
        </plugin>
           <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-shade-plugin</artifactId>
            <version>2.1</version>
            <executions>
                <execution>
                    <phase>package</phase>
                    <goals>
                        <goal>shade</goal>
                    </goals>
                    <configuration>
                        <transformers>
                            <transformer
                                implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                <mainClass>main.java.com.chatbot.Main</mainClass>
                            </transformer>
                        </transformers>
                    </configuration>
                </execution>
            </executions>
        </plugin>
          <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>exec-maven-plugin</artifactId>
            <version>1.2.1</version>
            <configuration>
                <mainClass>com.chatbot.Main</mainClass>
            </configuration>
    </plugin>
    </plugins>
</build>

---

ApacheMaven需要记住的一点是，其设计中的一个关键原则是约定优先于配置的原则。这意味着如果我们坚持maven约定，那么pom.xml文件就会变得更小、更简单

而你似乎已经陷入了困境。构建的关键元素包括：

您正在构建一个jar文件 它包含您编写的类 它包含将从源代码树中的.proto文件生成的类。 构建正确类型的工件 在构建jar文件时，pom应该正确声明打包：

<packaging>jar</packaging>

下面是一个传统的java包结构。因此：

将.proto文件移动到此位置

您的protobuf maven插件配置正常，但我怀疑您不需要：

 <goal>test-compile</goal>

---

经过一番周旋，我发现有两个问题：正如你正确指出的，我的惯例是错误的。具体来说，我是在另一个目录/main/com/proto中查找我的proto文件。虽然这是错误的，但这并不是给我带来巨大问题的原因。让我头疼的是需要清除.m2/repository目录，这导致了与java代码的冲突。幸运的是，我遇到了一个帖子，引导我进入写作方向。我需要所有依赖项来重新下载。我将此标记为答案，因为它最终解决并清楚地解释了我在原始pom.xml文件中遇到的一些关键问题。

 <goal>test-compile</goal>

<description>ffffff</description>
<artifactId>fffffff</artifactId>

<!-- you're building a jar -->
<packaging>jar</packaging>

<!-- the profiles section was meaningless -->

<organization>
    <name>fffff</name>
</organization>

<properties>

    <!-- protobuf paths -->
    <!-- you were fighting maven with these properties -->

    <!-- library versions -->
    <maven-shade-plugin.version>2.4.2</maven-shade-plugin.version>

    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>

</properties>

<dependencies>

    <dependency>
        <groupId>com.google.protobuf</groupId>
        <artifactId>protobuf-java</artifactId>
        <version>3.0.0</version>
    </dependency>

</dependencies>

<build>
    <plugins>

        <plugin>
            <!-- generate java from .proto files -->
            <groupId>org.xolstice.maven.plugins</groupId>
            <artifactId>protobuf-maven-plugin</artifactId>
            <version>0.5.1</version>
            <configuration>
                <protocExecutable>/usr/local/bin/protoc</protocExecutable>
            </configuration>
            <executions>
                <execution>
                    <goals>
                        <goal>compile</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>

        <!-- maven compiler plugin declaration is usually redundant unless you want a specific version -->

        <!-- I have not addressed this... -->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-shade-plugin</artifactId>
            ...
        </plugin>
    </plugins>
</build>