当我尝试在空数据库和我的 hibernate 实体之间运行简单的差异时，出现以下异常。该异常似乎表明它无法获取目录名称。我正在使用当前为空的 myqsl 数据库(没有表)。我的目标是使用代码中的实体来创建变更日志。 这些实体是 spring-boot 应用程序的一部分。
这是 liquibase 属性
referenceUrl=hibernate:spring:com.lowes.order.domain.pojos?dialect=org.hibernate.dialect.MySQL5Dialect&hibernate.physical_naming_strategy=org.springframework.boot.orm.jpa.hibernate.SpringPhysicalNamingStrategy&hibernate.implicit_naming_strategy=org.springframework.boot.orm.jpa.hibernate.SpringImplicitNamingStrategy
referenceDriver=liquibase.ext.hibernate.database.connection.HibernateDriver
url=jdbc:mysql://localhost:3306/test
username=root
password=password
promptOnNonLocalDatabase=false
verbose=true
driver=com.mysql.jdbc.Driver
outputChangeLogFile=src/main/resources/liquibase-outputChangeLog.xml
changeLogFile=src/main/resources/liquibase-changeLog.xml
diffChangeLogFile=src/main/resources/liquibase-diff-changeLog.xml
defaultSchemaName=test
referenceDefaultSchemaName=test
defaultCatalogName=test
referenceDefaultCatalogName=test
这是我运行 mvn liquibase:diff -X 时的异常
java.lang.NullPointerException
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:213)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
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:309)
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 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.MojoExecutionException: Error setting up or running Liquibase: liquibase.command.CommandExecutionException: java.lang.NullPointerException
at org.liquibase.maven.plugins.AbstractLiquibaseMojo.execute (AbstractLiquibaseMojo.java:398)
at org.liquibase.maven.plugins.LiquibaseDatabaseDiff.execute (LiquibaseDatabaseDiff.java:146)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:134)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:208)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
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:309)
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 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: liquibase.exception.LiquibaseException: liquibase.command.CommandExecutionException: java.lang.NullPointerException
at liquibase.integration.commandline.CommandLineUtils.doDiffToChangeLog (CommandLineUtils.java:233)
at liquibase.integration.commandline.CommandLineUtils.doDiffToChangeLog (CommandLineUtils.java:210)
at org.liquibase.maven.plugins.LiquibaseDatabaseDiff.performLiquibaseTask (LiquibaseDatabaseDiff.java:182)
at org.liquibase.maven.plugins.AbstractLiquibaseMojo.execute (AbstractLiquibaseMojo.java:394)
at org.liquibase.maven.plugins.LiquibaseDatabaseDiff.execute (LiquibaseDatabaseDiff.java:146)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:134)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:208)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
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:309)
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 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: liquibase.command.CommandExecutionException: java.lang.NullPointerException
at liquibase.command.AbstractCommand.execute (AbstractCommand.java:13)
at liquibase.integration.commandline.CommandLineUtils.doDiffToChangeLog (CommandLineUtils.java:231)
at liquibase.integration.commandline.CommandLineUtils.doDiffToChangeLog (CommandLineUtils.java:210)
at org.liquibase.maven.plugins.LiquibaseDatabaseDiff.performLiquibaseTask (LiquibaseDatabaseDiff.java:182)
at org.liquibase.maven.plugins.AbstractLiquibaseMojo.execute (AbstractLiquibaseMojo.java:394)
at org.liquibase.maven.plugins.LiquibaseDatabaseDiff.execute (LiquibaseDatabaseDiff.java:146)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:134)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:208)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
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:309)
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 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: java.lang.NullPointerException
at liquibase.snapshot.jvm.CatalogSnapshotGenerator.getDatabaseCatalogNames (CatalogSnapshotGenerator.java:82)*
at liquibase.snapshot.jvm.CatalogSnapshotGenerator.snapshotObject (CatalogSnapshotGenerator.java:41)
at liquibase.snapshot.jvm.JdbcSnapshotGenerator.snapshot (JdbcSnapshotGenerator.java:60)
at liquibase.snapshot.SnapshotGeneratorChain.snapshot (SnapshotGeneratorChain.java:50)
at liquibase.snapshot.DatabaseSnapshot.include (DatabaseSnapshot.java:246)
at liquibase.snapshot.DatabaseSnapshot.init (DatabaseSnapshot.java:75)
at liquibase.snapshot.DatabaseSnapshot.<init> (DatabaseSnapshot.java:53)
at liquibase.snapshot.JdbcDatabaseSnapshot.<init> (JdbcDatabaseSnapshot.java:28)
at liquibase.snapshot.SnapshotGeneratorFactory.createSnapshot (SnapshotGeneratorFactory.java:150)
at liquibase.snapshot.SnapshotGeneratorFactory.createSnapshot (SnapshotGeneratorFactory.java:139)
at liquibase.command.DiffCommand.createReferenceSnapshot (DiffCommand.java:219)
at liquibase.command.DiffCommand.createDiffResult (DiffCommand.java:141)
at liquibase.command.DiffToChangeLogCommand.run (DiffToChangeLogCommand.java:51)
at liquibase.command.AbstractCommand.execute (AbstractCommand.java:8)
at liquibase.integration.commandline.CommandLineUtils.doDiffToChangeLog (CommandLineUtils.java:231)
at liquibase.integration.commandline.CommandLineUtils.doDiffToChangeLog (CommandLineUtils.java:210)
at org.liquibase.maven.plugins.LiquibaseDatabaseDiff.performLiquibaseTask (LiquibaseDatabaseDiff.java:182)
at org.liquibase.maven.plugins.AbstractLiquibaseMojo.execute (AbstractLiquibaseMojo.java:394)
at org.liquibase.maven.plugins.LiquibaseDatabaseDiff.execute (LiquibaseDatabaseDiff.java:146)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:134)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:208)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
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:309)
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 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)
最佳答案
我和你有同样的需求，也遇到同样的问题。 Liquibase-hibernate 扩展必须与 liquibase-plugin 的正确版本相匹配。以下是我的解决方案的 Maven 配置:
<plugin>
<groupId>org.liquibase</groupId>
<artifactId>liquibase-maven-plugin</artifactId>
<version>3.5.5</version>
<dependencies>
<dependency>
<groupId>org.liquibase.ext</groupId>
<artifactId>liquibase-hibernate4</artifactId>
<version>3.6</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>4.1.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>1.7.3.RELEASE</version>
</dependency>
</dependencies>
<configuration>
``` <propertyFile>${basedir}/target/classes/db/liquibase/liquibase.properties</propertyFile>
</configuration>
</plugin>
关于mysql - Liquibase Hibernate diff 异常，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/50309739/