java Maven无法在本地存储库中找到依赖项[重复]

ruyhziif  于 2023-03-21  发布在  Java
关注(0)|答案(2)|浏览(125)

此问题在此处已有答案：

Maven project cannot locate dependencies in local repository（4个答案）
六年前关闭了。
它看起来很简单，所以我必须有一些配置问题。有一个演示项目与pom：

<?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.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

这个项目在我的.m2中构建并正确安装然后我有另一个项目，带有pom：

<?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.example</groupId>
    <artifactId>demo2</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>demo2</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>com.example</groupId>
            <artifactId>demo</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

当尝试从demo访问一个类时，我得到：

[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building demo2 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-clean-plugin:2.6.1:clean (default-clean) @ demo2 ---
[INFO] Deleting /home/lukasz/parent/demo2/target
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ demo2 ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] Copying 0 resource
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ demo2 ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to /home/lukasz/parent/demo2/target/classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] /home/lukasz/parent/demo2/src/main/java/com/example/Demo2Application.java:[11,17] cannot find symbol
  symbol:   class Aclass
  location: class com.example.Demo2Application
[ERROR] /home/lukasz/parent/demo2/src/main/java/com/example/Demo2Application.java:[11,32] cannot find symbol
  symbol:   class Aclass
  location: class com.example.Demo2Application
[INFO] 2 errors 
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.096 s
[INFO] Finished at: 2017-02-19T01:11:21+01:00
[INFO] Final Memory: 21M/203M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project demo2: Compilation failure: Compilation failure:
[ERROR] /home/lukasz/parent/demo2/src/main/java/com/example/Demo2Application.java:[11,17] cannot find symbol
[ERROR] symbol:   class Aclass
[ERROR] location: class com.example.Demo2Application
[ERROR] /home/lukasz/parent/demo2/src/main/java/com/example/Demo2Application.java:[11,32] cannot find symbol
[ERROR] symbol:   class Aclass
[ERROR] location: class com.example.Demo2Application
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

我错过了什么？

**编辑：**显然，我在demo项目上做了mvn clean install。有趣的是我可以使用：

javac -cp  .m2/repository/com/example/demo/0.0.1-SNAPSHOT/demo-0.0.1-SNAPSHOT.jar <any java file here>

**编辑：**mvn -X的最后一部分：

[DEBUG] Classpath: [/home/ala/parent/demo2/target/classes
 /home/ala/.m2/repository/com/example/demo/0.0.1-SNAPSHOT/demo-0.0.1-SNAPSHOT.jar
 /home/ala/.m2/repository/org/springframework/boot/spring-boot-starter/1.5.1.RELEASE/spring-boot-starter-1.5.1.RELEASE.jar
 /home/ala/.m2/repository/org/springframework/boot/spring-boot/1.5.1.RELEASE/spring-boot-1.5.1.RELEASE.jar
 /home/ala/.m2/repository/org/springframework/spring-context/4.3.6.RELEASE/spring-context-4.3.6.RELEASE.jar
 /home/ala/.m2/repository/org/springframework/spring-aop/4.3.6.RELEASE/spring-aop-4.3.6.RELEASE.jar
 /home/ala/.m2/repository/org/springframework/spring-beans/4.3.6.RELEASE/spring-beans-4.3.6.RELEASE.jar
 /home/ala/.m2/repository/org/springframework/spring-expression/4.3.6.RELEASE/spring-expression-4.3.6.RELEASE.jar
 /home/ala/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/1.5.1.RELEASE/spring-boot-autoconfigure-1.5.1.RELEASE.jar
 /home/ala/.m2/repository/org/springframework/boot/spring-boot-starter-logging/1.5.1.RELEASE/spring-boot-starter-logging-1.5.1.RELEASE.jar
 /home/ala/.m2/repository/ch/qos/logback/logback-classic/1.1.9/logback-classic-1.1.9.jar
 /home/ala/.m2/repository/ch/qos/logback/logback-core/1.1.9/logback-core-1.1.9.jar
 /home/ala/.m2/repository/org/slf4j/jcl-over-slf4j/1.7.22/jcl-over-slf4j-1.7.22.jar
 /home/ala/.m2/repository/org/slf4j/jul-to-slf4j/1.7.22/jul-to-slf4j-1.7.22.jar
 /home/ala/.m2/repository/org/slf4j/log4j-over-slf4j/1.7.22/log4j-over-slf4j-1.7.22.jar
 /home/ala/.m2/repository/org/springframework/spring-core/4.3.6.RELEASE/spring-core-4.3.6.RELEASE.jar
 /home/ala/.m2/repository/org/slf4j/slf4j-api/1.7.22/slf4j-api-1.7.22.jar]
[DEBUG] Output directory: /home/ala/parent/demo2/target/classes
[DEBUG] CompilerReuseStrategy: reuseCreated
[DEBUG] useIncrementalCompilation enabled
[DEBUG] Stale source detected: /home/ala/parent/demo2/src/main/java/com/example/Demo2Application.java
[INFO] Changes detected - recompiling the module!
[DEBUG] Classpath:
[DEBUG]  /home/ala/parent/demo2/target/classes
[DEBUG]  /home/ala/.m2/repository/com/example/demo/0.0.1-SNAPSHOT/demo-0.0.1-SNAPSHOT.jar
[DEBUG]  /home/ala/.m2/repository/org/springframework/boot/spring-boot-starter/1.5.1.RELEASE/spring-boot-starter-1.5.1.RELEASE.jar
[DEBUG]  /home/ala/.m2/repository/org/springframework/boot/spring-boot/1.5.1.RELEASE/spring-boot-1.5.1.RELEASE.jar
[DEBUG]  /home/ala/.m2/repository/org/springframework/spring-context/4.3.6.RELEASE/spring-context-4.3.6.RELEASE.jar
[DEBUG]  /home/ala/.m2/repository/org/springframework/spring-aop/4.3.6.RELEASE/spring-aop-4.3.6.RELEASE.jar
[DEBUG]  /home/ala/.m2/repository/org/springframework/spring-beans/4.3.6.RELEASE/spring-beans-4.3.6.RELEASE.jar
[DEBUG]  /home/ala/.m2/repository/org/springframework/spring-expression/4.3.6.RELEASE/spring-expression-4.3.6.RELEASE.jar
[DEBUG]  /home/ala/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/1.5.1.RELEASE/spring-boot-autoconfigure-1.5.1.RELEASE.jar
[DEBUG]  /home/ala/.m2/repository/org/springframework/boot/spring-boot-starter-logging/1.5.1.RELEASE/spring-boot-starter-logging-1.5.1.RELEASE.jar
[DEBUG]  /home/ala/.m2/repository/ch/qos/logback/logback-classic/1.1.9/logback-classic-1.1.9.jar
[DEBUG]  /home/ala/.m2/repository/ch/qos/logback/logback-core/1.1.9/logback-core-1.1.9.jar
[DEBUG]  /home/ala/.m2/repository/org/slf4j/jcl-over-slf4j/1.7.22/jcl-over-slf4j-1.7.22.jar
[DEBUG]  /home/ala/.m2/repository/org/slf4j/jul-to-slf4j/1.7.22/jul-to-slf4j-1.7.22.jar
[DEBUG]  /home/ala/.m2/repository/org/slf4j/log4j-over-slf4j/1.7.22/log4j-over-slf4j-1.7.22.jar
[DEBUG]  /home/ala/.m2/repository/org/springframework/spring-core/4.3.6.RELEASE/spring-core-4.3.6.RELEASE.jar
[DEBUG]  /home/ala/.m2/repository/org/slf4j/slf4j-api/1.7.22/slf4j-api-1.7.22.jar
[DEBUG] Source roots:
[DEBUG]  /home/ala/parent/demo2/src/main/java
[DEBUG] Command line options:
[DEBUG] -d /home/ala/parent/demo2/target/classes -classpath /home/ala/parent/demo2/target/classes:/home/ala/.m2/repository/com/example/demo/0.0.1-SNAPSHOT/demo-0.0.1-SNAPSHOT.jar:/home/ala/.m2/repository/org/springframework/boot/spring-boot-starter/1.5.1.RELEASE/spring-boot-starter-1.5.1.RELEASE.jar:/home/ala/.m2/repository/org/springframework/boot/spring-boot/1.5.1.RELEASE/spring-boot-1.5.1.RELEASE.jar:/home/ala/.m2/repository/org/springframework/spring-context/4.3.6.RELEASE/spring-context-4.3.6.RELEASE.jar:/home/ala/.m2/repository/org/springframework/spring-aop/4.3.6.RELEASE/spring-aop-4.3.6.RELEASE.jar:/home/ala/.m2/repository/org/springframework/spring-beans/4.3.6.RELEASE/spring-beans-4.3.6.RELEASE.jar:/home/ala/.m2/repository/org/springframework/spring-expression/4.3.6.RELEASE/spring-expression-4.3.6.RELEASE.jar:/home/ala/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/1.5.1.RELEASE/spring-boot-autoconfigure-1.5.1.RELEASE.jar:/home/ala/.m2/repository/org/springframework/boot/spring-boot-starter-logging/1.5.1.RELEASE/spring-boot-starter-logging-1.5.1.RELEASE.jar:/home/ala/.m2/repository/ch/qos/logback/logback-classic/1.1.9/logback-classic-1.1.9.jar:/home/ala/.m2/repository/ch/qos/logback/logback-core/1.1.9/logback-core-1.1.9.jar:/home/ala/.m2/repository/org/slf4j/jcl-over-slf4j/1.7.22/jcl-over-slf4j-1.7.22.jar:/home/ala/.m2/repository/org/slf4j/jul-to-slf4j/1.7.22/jul-to-slf4j-1.7.22.jar:/home/ala/.m2/repository/org/slf4j/log4j-over-slf4j/1.7.22/log4j-over-slf4j-1.7.22.jar:/home/ala/.m2/repository/org/springframework/spring-core/4.3.6.RELEASE/spring-core-4.3.6.RELEASE.jar:/home/ala/.m2/repository/org/slf4j/slf4j-api/1.7.22/slf4j-api-1.7.22.jar: -sourcepath /home/ala/parent/demo2/src/main/java: -s /home/ala/parent/demo2/target/generated-sources/annotations -g -nowarn -target 1.8 -source 1.8 -encoding UTF-8
[DEBUG] incrementalBuildHelper#beforeRebuildExecution
[INFO] Compiling 1 source file to /home/ala/parent/demo2/target/classes
[DEBUG] incrementalBuildHelper#afterRebuildExecution
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] /home/ala/parent/demo2/src/main/java/com/example/Demo2Application.java:[11,17] cannot find symbol
  symbol:   class Aclass
  location: class com.example.Demo2Application
[ERROR] /home/ala/parent/demo2/src/main/java/com/example/Demo2Application.java:[11,32] cannot find symbol
  symbol:   class Aclass
  location: class com.example.Demo2Application
[INFO] 2 errors 
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.789 s
[INFO] Finished at: 2017-02-19T07:15:39+01:00
[INFO] Final Memory: 21M/201M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project demo2: Compilation failure: Compilation failure:
[ERROR] /home/ala/parent/demo2/src/main/java/com/example/Demo2Application.java:[11,17] cannot find symbol
[ERROR] symbol:   class Aclass
[ERROR] location: class com.example.Demo2Application
[ERROR] /home/ala/parent/demo2/src/main/java/com/example/Demo2Application.java:[11,32] cannot find symbol
[ERROR] symbol:   class Aclass
[ERROR] location: class com.example.Demo2Application
[ERROR] -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project demo2: Compilation failure
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:212)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.maven.plugin.compiler.CompilationFailureException: Compilation failure
    at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:858)
    at org.apache.maven.plugin.compiler.CompilerMojo.execute(CompilerMojo.java:129)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
    ... 20 more
[ERROR] 
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
Java

2条答案

按热度按时间
vm0i2vca

vm0i2vca1#

以下是一些建议：
1.使用“mvn-Xcleaninstall”运行你的坏版本进行调试。日志应该包括Maven正在寻找每个依赖项的repo. URLs。
1.解压缩jar文件以验证是否包含了您想要的类。

赞(0）分享  回复(0）举报  2023-03-21
q3aa0525

q3aa05252#

Maven在此配置中找不到包com.example。

<dependency>
     <groupId>com.example</groupId>
     <artifactId>demo</artifactId>
     <version>0.0.1-SNAPSHOT</version> </dependency>

因此，您必须通过use命令将此软件包安装为本地软件包：第一个项目中的mvn clean install。
或者您也可以使用以下命令将其安装为第三方软件包：
mvn install：install-file -Dfile={your directory}\demo-{version}.jar -DgroupId=com.example -DartifactId=demo -Dversion={version} -Dpackaging=jar
安装正确后，它将工作。
使用2.5版的maven-install-plugin，它可以变得更简单：如果JAR是由Apache Maven构建的，它将在META-INF/目录的子目录中包含一个pom.xml，默认情况下将读取该子目录。在这种情况下，您需要做的就是：
mvn org.apache.maven.plugins:maven-install-plugin:2.5.2:install-file -Dfile=<path-to-file>
https://maven.apache.org/guides/mini/guide-3rd-party-jars-local.html

赞(0）分享  回复(0）举报  2023-03-21
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