无法运行基于Maven的Spring项目，该项目是用Java 10创建的Spring初始化器创建的

Question

我使用Ubuntu18.04，将Java更新为最新版本10，现在无法运行简单的Maven项目。

创建了一个简单的maven项目，并尝试运行它。

以下是控制台中的错误

[ERROR] Some problems were encountered while processing the POMs:
[WARNING] 'parent.relativePath' of POM com.mynotes.spring-cloud:spring-cloud-contract-consumer:0.0.1-SNAPSHOT (/home/dhananjay/Github/spring-cloud-contract/spring-cloud-contract-consumer/pom.xml) points at com.mynotes.spring-cloud:spring-cloud-contract instead of org.springframework.boot:spring-boot-starter-parent, please verify your project structure @ line 14, column 10
[FATAL] Non-resolvable parent POM for com.mynotes.spring-cloud:spring-cloud-contract-consumer:0.0.1-SNAPSHOT: Could not transfer artifact org.springframework.boot:spring-boot-starter-parent:pom:1.5.13.RELEASE from/to central (https://repo.maven.apache.org/maven2): java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty and 'parent.relativePath' points at wrong local POM @ line 14, column 10
 @ 
[ERROR] The build could not read 1 project -> [Help 1]
org.apache.maven.project.ProjectBuildingException: Some problems were encountered while processing the POMs:
[WARNING] 'parent.relativePath' of POM com.mynotes.spring-cloud:spring-cloud-contract-consumer:0.0.1-SNAPSHOT (/home/dhananjay/Github/spring-cloud-contract/spring-cloud-contract-consumer/pom.xml) points at com.mynotes.spring-cloud:spring-cloud-contract instead of org.springframework.boot:spring-boot-starter-parent, please verify your project structure @ line 14, column 10
[FATAL] Non-resolvable parent POM for com.mynotes.spring-cloud:spring-cloud-contract-consumer:0.0.1-SNAPSHOT: Could not transfer artifact org.springframework.boot:spring-boot-starter-parent:pom:1.5.13.RELEASE from/to central (https://repo.maven.apache.org/maven2): java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty and 'parent.relativePath' points at wrong local POM @ line 14, column 10

    at org.apache.maven.project.DefaultProjectBuilder.build (DefaultProjectBuilder.java:382)
    at org.apache.maven.graph.DefaultGraphBuilder.collectProjects (DefaultGraphBuilder.java:400)
    at org.apache.maven.graph.DefaultGraphBuilder.getProjectsForMavenReactor (DefaultGraphBuilder.java:391)
    at org.apache.maven.graph.DefaultGraphBuilder.build (DefaultGraphBuilder.java:78)
    at org.apache.maven.DefaultMaven.buildGraph (DefaultMaven.java:511)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:221)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:194)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:107)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:955)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:194)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:564)
    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)
[ERROR]   
[ERROR]   The project com.mynotes.spring-cloud:spring-cloud-contract-consumer:0.0.1-SNAPSHOT (/home/dhananjay/Github/spring-cloud-contract/spring-cloud-contract-consumer/pom.xml) has 1 error
[ERROR]     Non-resolvable parent POM for com.mynotes.spring-cloud:spring-cloud-contract-consumer:0.0.1-SNAPSHOT: Could not transfer artifact org.springframework.boot:spring-boot-starter-parent:pom:1.5.13.RELEASE from/to central (https://repo.maven.apache.org/maven2): java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty and 'parent.relativePath' points at wrong local POM @ line 14, column 10 -> [Help 2]
org.apache.maven.model.resolution.UnresolvableModelException: Could not transfer artifact org.springframework.boot:spring-boot-starter-parent:pom:1.5.13.RELEASE from/to central (https://repo.maven.apache.org/maven2): java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty
    at org.apache.maven.project.ProjectModelResolver.resolveModel (ProjectModelResolver.java:197)
    at org.apache.maven.project.ProjectModelResolver.resolveModel (ProjectModelResolver.java:243)
    at org.apache.maven.model.building.DefaultModelBuilder.readParentExternally (DefaultModelBuilder.java:1051)
    at org.apache.maven.model.building.DefaultModelBuilder.readParent (DefaultModelBuilder.java:829)
    at org.apache.maven.model.building.DefaultModelBuilder.build (DefaultModelBuilder.java:331)
    at org.apache.maven.project.DefaultProjectBuilder.build (DefaultProjectBuilder.java:429)
    at org.apache.maven.project.DefaultProjectBuilder.build (DefaultProjectBuilder.java:398)
    at org.apache.maven.project.DefaultProjectBuilder.build (DefaultProjectBuilder.java:362)
    at org.apache.maven.graph.DefaultGraphBuilder.collectProjects (DefaultGraphBuilder.java:400)
    at org.apache.maven.graph.DefaultGraphBuilder.getProjectsForMavenReactor (DefaultGraphBuilder.java:391)
    at org.apache.maven.graph.DefaultGraphBuilder.build (Defaul

在许多项目中，我都遇到了类似的错误。

Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty

在谷歌上搜索了一下，发现了这个修复方法。https://gist.github.com/mikaelhg/527204e746984cf9a33f7910bb8b4cb6这种方法适用于简单的Maven项目，但不适用于与Spring相关的项目。

任何帮助都将不胜感激。

恢复到java 8，一切正常，但我想知道为什么它不适用于java 10.。

$ sudo update-alternatives --config javac
There are 2 choices for the alternative javac (providing /usr/bin/javac).

  Selection    Path                                   Priority   Status
------------------------------------------------------------
  0            /usr/lib/jvm/java-8-oracle/bin/javac    1081      auto mode
  1            /usr/lib/jvm/java-10-oracle/bin/javac   2         manual mode
* 2            /usr/lib/jvm/java-8-oracle/bin/javac    1081      manual mode

Press <enter> to keep the current choice[*], or type selection number: 

$ sudo update-alternatives --config java
There are 2 choices for the alternative java (providing /usr/bin/java).

  Selection    Path                                     Priority   Status
------------------------------------------------------------
  0            /usr/lib/jvm/java-8-oracle/jre/bin/java   1081      auto mode
  1            /usr/lib/jvm/java-10-oracle/bin/java      2         manual mode
* 2            /usr/lib/jvm/java-8-oracle/jre/bin/java   1081      manual mode

Press <enter> to keep the current choice[*], or type selection number: 

$ java -version
java version "1.8.0_171"
Java(TM) SE Runtime Environment (build 1.8.0_171-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.171-b11, mixed mode)

$ javac -version
javac 1.8.0_171

POM.xml

<?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.mynotes.spring-cloud</groupId>
    <artifactId>spring-cloud-contract-producer</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>spring-cloud-contract-producer</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.2.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>
        <spring-cloud.version>Edgware.SR3</spring-cloud.version>
    </properties>

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

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

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

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


</project>

Answer 1

我们在工作的个人电脑上有这个问题。结果是一个完完全全的java版本。我们已经安装了java8oracle而不是openjdk-8。

删除所有java安装，从一开始就开始安装，确保安装openjdk而不是oracle的

对于卸载java，我只需向您介绍这个线程- https://askubuntu.com/questions/84483/how-to-completely-uninstall-java。

安装：

sudo apt-get install openjdk-8-jdk

Answer 2

Java 10还不支持Spring。

切换到Java 8：

sudo update-alternatives --config java

并选择Java 8。