Java 为使用spring数据jpa和maven的项目创建一个可执行jar

我正在尝试使用

java-jar

我尝试了多种方法来创建这个带有依赖项的jar

• 第一条路

将“maven依赖项”和“maven jar”插件添加到pom文件中

<build>
    <plugins>

        <plugin>
            <artifactId>maven-dependency-plugin</artifactId>
            <executions>
                <execution>
                    <phase>install</phase>
                    <goals>
                        <goal>copy-dependencies</goal>
                    </goals>
                    <configuration>
                        <outputDirectory>${project.build.directory}/lib</outputDirectory>
                    </configuration>
                </execution>
            </executions>
        </plugin>

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-jar-plugin</artifactId>
            <configuration>
                <useDefaultManifestFile>true</useDefaultManifestFile>
                <archive>
                    <manifest>
                        <addClasspath>true</addClasspath>
                        <mainClass>fully.qualified.MainClass</mainClass>
                        <classpathPrefix>lib/</classpathPrefix>
                    </manifest>
                </archive>
            </configuration>
        </plugin>


    </plugins>
</build>

我验证了META-INF/Persistence.xml是否存在

• 第三条路

尝试了maven shade插件

<build>
    <plugins>

        <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>fully.qualified.MainClass</mainClass>
                            </transformer>
                            <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                <resource>META-INF/spring.handlers</resource>
                            </transformer>
                            <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                <resource>META-INF/spring.schemas</resource>
                            </transformer>
                        </transformers>
                    </configuration>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

---

我也选择了第二种选择，但也遇到了类似的问题。您遇到的问题是，您正在合并多个spring依赖项，这些依赖项为工厂、处理程序、名称空间和遇到冲突的类似对象提供了各自的定义

---

解决这个问题的方法是检查此类定义的所有spring依赖项，并通过组合它们将它们添加到项目中。有关更多详细信息，您可以查看此配置或我组合配置的位置。

只需使用SpringBoot即可。它用于生成一个胖的可执行jar。您可以使用为Maven创建SpringBoot项目，您可以将代码导入其中。就冲突而言，使用Maven的Spring BOM如下：

org.springframework
spring框架bom表
4.3.8.1发布
聚甲醛
进口

---

它将确保您的所有版本一致。

您是如何解决此问题的？我对第二种选择也有同样的问题。

Exception in thread "main" org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Unable to locate Spring NamespaceHandler for XML schema namespace [http://www.springframework.org/schema/data/jpa]
Offending resource: class path resource [META-INF/spring/app-context.xml]

        at org.springframework.beans.factory.parsing.FailFastProblemReporter.error(FailFastProblemReporter.java:70)
        at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:85)

<build>
    <plugins>

        <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>fully.qualified.MainClass</mainClass>
                            </transformer>
                            <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                <resource>META-INF/spring.handlers</resource>
                            </transformer>
                            <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                <resource>META-INF/spring.schemas</resource>
                            </transformer>
                        </transformers>
                    </configuration>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

[main] INFO org.springframework.jdbc.datasource.DriverManagerDataSource - Loaded JDBC driver: org.h2.Driver
1022 [main] WARN org.springframework.context.support.ClassPathXmlApplicationContext - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in com.vmware.vra.performance.loganalyzer.Repository.JpaConfiguration: Invocation of init method failed; nested exception is java.lang.IllegalStateException: No persistence units parsed from {classpath*:META-INF/persistence.xml}
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in com.vmware.vra.performance.loganalyzer.Repository.JpaConfiguration: Invocation of init method failed; nested exception is java.lang.IllegalStateException: No persistence units parsed from {classpath*:META-INF/persistence.xml}

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-framework-bom</artifactId>
            <version>4.3.8.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>