Kotlin：运行jar时缺少驱动程序的例外

我试图连接基于gradle的kotlin应用程序到mssql数据库（通过模块hikari＆hibernate fw）。 当我在IDE（intellij Idea）中运行kotlin应用程序时，一切工作正常，但是当我通过gradlew编译它时，它会抛出exception，它缺少驱动程序，我不知道如何将它嵌入到jar中。 我尝试了谷歌搜索，发现有关将驱动程序添加到jar的类路径的东西，但没有运气。 尝试驱动程序编译组：’net.sourceforge.jtds’，名称：’jtds’，版本：’1.3.1′在依赖关系，但没有运气。

具有数据库处理程序的模块具有build.gradle

apply plugin: 'java' apply plugin: 'kotlin' sourceCompatibility = 1.8 targetCompatibility = 1.8 ext { kotlinVersion = '1.1.50' jUnitVersion = '4.12' jacksonVersion = '2.8.6' networkntVersion = '0.1.7' jsoupVersion = '1.10.3' slf4jVersion = '1.7.21' elasticSearchVersion = '5.6.5' hikariCpVersion = '2.6.1' hibernateVersion = '5.2.10.Final' redisVersion = '2.9.0' mysqlVersion = '6.0.6' jtdsVersion = '1.3.1' rabbitMqVersion = '4.2.0' } tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).all { kotlinOptions { jvmTarget = "1.8" } } /* BUILDSCRIPT */ buildscript { ext.kotlinVersion = '1.1.50' repositories { mavenCentral() } dependencies { classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion" classpath "org.jetbrains.kotlin:kotlin-noarg:$kotlinVersion" } } repositories { mavenCentral() } dependencies { compile "org.jetbrains.kotlin:kotlin-stdlib-jre8:$kotlinVersion" testCompile "org.jetbrains.kotlin:kotlin-test-junit:$kotlinVersion" testCompile group: 'junit', name: 'junit', version: "$jUnitVersion" // kotlin-reflect as explicit dependency because of compilation errors in gradle compile "org.jetbrains.kotlin:kotlin-reflect:$kotlinVersion" // https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core compile group: 'com.fasterxml.jackson.core', name: 'jackson-core', version: "$jacksonVersion" // https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind compile group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: "$jacksonVersion" // https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-annotations compile group: 'com.fasterxml.jackson.core', name: 'jackson-annotations', version: "$jacksonVersion" // https://mvnrepository.com/artifact/com.fasterxml.jackson.module/jackson-module-kotlin compile group: 'com.fasterxml.jackson.module', name: 'jackson-module-kotlin', version: "$jacksonVersion" // https://mvnrepository.com/artifact/com.fasterxml.jackson.datatype/jackson-datatype-jsr310 compile group: 'com.fasterxml.jackson.datatype', name: 'jackson-datatype-jsr310', version: "$jacksonVersion" // https://mvnrepository.com/artifact/com.fasterxml.jackson.datatype/jackson-datatype-jdk8 compile group: 'com.fasterxml.jackson.datatype', name: 'jackson-datatype-jdk8', version: "$jacksonVersion" // https://mvnrepository.com/artifact/com.fasterxml.jackson.dataformat/jackson-dataformat-xml compile group: 'com.fasterxml.jackson.dataformat', name: 'jackson-dataformat-xml', version: "$jacksonVersion" // json schema validator (based on jackson) compile group: 'com.networknt', name: 'json-schema-validator', version: "$networkntVersion" // html parser compile "org.jsoup:jsoup:$jsoupVersion" // logging compile group: 'org.slf4j', name: 'slf4j-api', version: "$slf4jVersion" compile group: 'org.slf4j', name: 'slf4j-log4j12', version: "$slf4jVersion" // ckf.upe.common.elastic // https://mvnrepository.com/artifact/org.elasticsearch/elasticsearch // https://www.elastic.co/guide/en/elasticsearch/client/java-api/5.6/transport-client.html compile group: 'org.elasticsearch.client', name: 'transport', version: "$elasticSearchVersion" // ckf.upe.common.database // connection pool // https://github.com/brettwooldridge/HikariCP compile group: 'com.zaxxer', name: 'HikariCP', version: "$hikariCpVersion" // hibernate compile group: 'org.hibernate', name: 'hibernate-core', version: "$hibernateVersion" // hibernate-hikaricp // https://mvnrepository.com/artifact/org.hibernate/hibernate-hikaricp compile group: 'org.hibernate', name: 'hibernate-hikaricp', version: "$hibernateVersion" // https://mvnrepository.com/artifact/redis.clients/jedis // https://github.com/xetorthio/jedis compile group: 'redis.clients', name: 'jedis', version: "$redisVersion" } 

运行jar文件时抛出的exception是：

 Exception in thread "main" org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment] at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:271) at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:233) at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:210) at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:51) at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:94) at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:242) at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:210) at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.handleTypes(MetadataBuildingProcess.java:352) at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:111) at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.build(MetadataBuildingProcess.java:83) at org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:418) at org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:87) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:691) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:726) at ckf.upe.application.App.getSessionFactory(App.kt:104) at ckf.upe.fischer.database.MappingRepository.sessionFactory(MappingRepository.kt:13) at ckf.upe.common.sql.AbstractRepository.withSession(AbstractRepository.kt:21) at ckf.upe.mapping.service.MappingService.loadMapping(MappingService.kt:33) at ckf.upe.application.upe.MainKt.main(main.kt:41) Caused by: org.hibernate.HibernateException: java.lang.RuntimeException: Failed to get driver instance for jdbcUrl=jdbc:jtds:sqlserver://devsql2.fischer:1433/CKFischer_Mapping_PROD;useLOBs=false at org.hibernate.hikaricp.internal.HikariCPConnectionProvider.configure(HikariCPConnectionProvider.java:63) at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:94) at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:242) at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:210) at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.buildJdbcConnectionAccess(JdbcEnvironmentInitiator.java:145) at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:66) at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35) at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:88) at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:259) ... 18 more Caused by: java.lang.RuntimeException: Failed to get driver instance for jdbcUrl=jdbc:jtds:sqlserver://devsql2.fischer:1433/CKFischer_Mapping_PROD;useLOBs=false at com.zaxxer.hikari.util.DriverDataSource.(DriverDataSource.java:88) at com.zaxxer.hikari.pool.PoolBase.initializeDataSource(PoolBase.java:323) at com.zaxxer.hikari.pool.PoolBase.(PoolBase.java:114) at com.zaxxer.hikari.pool.HikariPool.(HikariPool.java:105) at com.zaxxer.hikari.HikariDataSource.(HikariDataSource.java:72) at org.hibernate.hikaricp.internal.HikariCPConnectionProvider.configure(HikariCPConnectionProvider.java:59) ... 26 more Caused by: java.sql.SQLException: No suitable driver at java.sql.DriverManager.getDriver(Unknown Source) at com.zaxxer.hikari.util.DriverDataSource.(DriverDataSource.java:81) ... 31 more 

Answer 1

好的，find了@Hannes提到的解决方案，你需要在你的应用程序中显式实例化Class.forName("net.sourceforge.jtds.jdbc.Driver").newInstance() 。 更多信息在这里： jtds.sourceforge.net/faq.html