為什么用 Maven 和 Hibernate 設置一個簡單的項目會失敗？

Question

這是一個簡單的項目，包括進行 MySQL 查詢並顯示它。 我使用 NetBeans。 hibernate.xml 和 client.xml 文件由 NetBeans（Hibernate Configuration Wizard 和 Hibernate Mapping Wizard）創建。 我真的不知道問題是什么。 1）POM文件：

<?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.mycompany</groupId>
    <artifactId>alsoMaven</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>
    <dependencies>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>6.0.5</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>5.4.10.Final</version>
            <type>jar</type>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>4.3.1.Final</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate.javax.persistence</groupId>
            <artifactId>hibernate-jpa-2.1-api</artifactId>
            <version>1.0.0.Final</version>
        </dependency>
    </dependencies>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>
</project>

2) 主類：

public static void main(String[] args) {
    StandardServiceRegistry registry = new StandardServiceRegistryBuilder()
            .configure() // obtiene los valores de hibernate.cfg.xml
            .build();
    try {
        SessionFactory sessionFactory = new MetadataSources(registry)
                .buildMetadata().buildSessionFactory();
        Session session = sessionFactory.openSession();
        session.beginTransaction();
        Cliente c = (Cliente) session.load(Cliente.class, 1);
        System.out.println(c);
        session.getTransaction().commit();
        session.close();
        sessionFactory.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

3) 例外：

------------------------------------------------------------------------
Building alsoMaven 1.0-SNAPSHOT
------------------------------------------------------------------------
Downloading: http://repo.maven.apache.org/maven2/org/jboss/spec/javax/transaction/jboss-transaction-api_1.2_spec/1.1.1.Final/jboss-transaction-api_1.2_spec-1.1.1.Final.jar
Downloading: http://repo.maven.apache.org/maven2/org/javassist/javassist/3.24.0-GA/javassist-3.24.0-GA.jar
Downloading: http://repo.maven.apache.org/maven2/org/jboss/logging/jboss-logging/3.3.2.Final/jboss-logging-3.3.2.Final.jar
Downloading: http://repo.maven.apache.org/maven2/org/hibernate/common/hibernate-commons-annotations/5.1.0.Final/hibernate-commons-annotations-5.1.0.Final.jar




------------------------------------------------------------------------
BUILD FAILURE
------------------------------------------------------------------------
Total time: 3.184s
Finished at: Sun Mar 08 21:10:54 GMT-03:00 2020
Final Memory: 6M/16M
------------------------------------------------------------------------
Failed to execute goal on project alsoMaven: Could not resolve dependencies for project com.mycompany:alsoMaven:jar:1.0-SNAPSHOT: The following artifacts could not be resolved: org.jboss.logging:jboss-logging:jar:3.3.2.Final, org.javassist:javassist:jar:3.24.0-GA, org.jboss.spec.javax.transaction:jboss-transaction-api_1.2_spec:jar:1.1.1.Final, org.hibernate.common:hibernate-commons-annotations:jar:5.1.0.Final: Could not transfer artifact org.jboss.logging:jboss-logging:jar:3.3.2.Final from/to central (http://repo.maven.apache.org/maven2): Failed to transfer file: http://repo.maven.apache.org/maven2/org/jboss/logging/jboss-logging/3.3.2.Final/jboss-logging-3.3.2.Final.jar. Return code is: 501 , ReasonPhrase:HTTPS Required. -> [Help 1]

To see the full stack trace of the errors, re-run Maven with the -e switch.
Re-run Maven using the -X switch to enable full debug logging.

謝謝！

Answer 1

從 2020 年 1 月 15 日開始，中央 Maven 存儲庫不支持通過純 HTTP 進行的不安全通信。 您必須調整本地配置。

考慮到這一點，我們在錯誤消息中找到了一個重要的細節：

返回碼為：501，ReasonPhrase： HTTPS Required 。

正如我們在輸出中看到的，您仍然使用普通的、未加密的連接來查詢/檢索來自 Maven Central 的人工制品：

下載： http ://repo.maven.apache.org/maven2/org/jboss/spec/javax/transaction/jboss-transaction-api_1.2_spec/1.1.1.Final/jboss-transaction-api_1.2_spec-1.1。 1.Final.jar

...

確保您的本地settings.xml僅包含其中包含 Maven 中央存儲庫的 http的條目。 因此，條目http://repo.maven.apache.org/maven2/必須更改為https://repo.maven.apache.org/maven2/ 。

一個最小的工作配置如下：

<profile>
    <id>maven-https</id>
    <activation>
        <activeByDefault>true</activeByDefault>
    </activation>
    <repositories>
        <repository>
            <id>central</id>
            <url>https://repo1.maven.org/maven2</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>central</id>
            <url>https://repo1.maven.org/maven2</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories> 
</profile>

希望能幫助到你。

Answer 2

您可能需要在settings.xml 中添加代理，如下所示

<proxies>
    <proxy>
        <id>optional</id>
        <active>true</active>
        <protocol>https</protocol>
        <username>abc</</username>
        <password>abc123</password>
        <host>webproxy.company.com</host>
        <port>8081</port>
        <!-- <nonProxyHosts>local.net|some.host.com</nonProxyHosts> -->
    </proxy>
</proxies>