我一直在努力制作一个简单的弹簧批量应用，它可以读取CSV并将结果打印到日志中。我不能把这件事搞定。我真的很感激任何关于我做错了什么的信息。
我做了一个github回购：https://github.com/rtconner/hello
我希望看到处理器中的Converting (" + person + ") into (" + transformedPerson + ")行。此外，我希望看到从LogItemWriter打印到日志的日志行。我从来没有看到任何一个打印出来。
感谢您对此提供任何帮助。
答案 0 :(得分：2)
您在项目中犯了多个错误。
根本原因：
在Àpplication.java中，您正在传递配置类，因为它需要成为您的Application.class本身。
SpringApplication.run(Application.class, args);代替SpringApplication.run(BatchConfiguration.class, args);
修复此问题后，您将面临项目中出现的其他多个错误，
添加依赖项，compile 'com.h2database:h2'以及Java配置以下，
@Bean
public ResourcelessTransactionManager transactionManager() {
return new ResourcelessTransactionManager();
}
@Bean
public MapJobRepositoryFactoryBean mapJobRepositoryFactory(ResourcelessTransactionManager txManager)
throws Exception {
MapJobRepositoryFactoryBean factory = new MapJobRepositoryFactoryBean(txManager);
factory.afterPropertiesSet();
return factory;
}
@Bean
public JobRepository jobRepository(MapJobRepositoryFactoryBean factory) throws Exception {
return factory.getObject();
}
@Bean
public SimpleJobLauncher jobLauncher(JobRepository jobRepository) {
SimpleJobLauncher launcher = new SimpleJobLauncher();
launcher.setJobRepository(jobRepository);
return launcher;
}
我没有尝试过，但如果您的类路径中存在H2或HSQLDB，可能就不需要上面的配置了。为了完整起见我加了。
compile group: 'org.hibernate', name: 'hibernate-core', version: '5.2.10.Final'而你需要的是，
compile group: 'org.hibernate', name: 'hibernate-validator', version: '5.2.1.Final'
我在修好这些东西后运行你的应用程序，下面是日志，
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.5.4.RELEASE)
2017-07-02 15:02:15.966 INFO 4872 --- [ main] hello.Application : Starting Application on Bi-amma with PID 4872 (E:\GithubSamples\hello-master\bin started by kaneez in E:\GithubSamples\hello-master)
2017-07-02 15:02:15.971 INFO 4872 --- [ main] hello.Application : No active profile set, falling back to default profiles: default
2017-07-02 15:02:16.114 INFO 4872 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@45dd4eda: startup date [Sun Jul 02 15:02:16 IST 2017]; root of context hierarchy
2017-07-02 15:02:16.786 INFO 4872 --- [ main] o.s.b.f.s.DefaultListableBeanFactory : Overriding bean definition for bean 'transactionManager' with a different definition: replacing [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration; factoryMethodName=transactionManager; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/batch/core/configuration/annotation/SimpleBatchConfiguration.class]] with [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=batchConfiguration; factoryMethodName=transactionManager; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [hello/BatchConfiguration.class]]
2017-07-02 15:02:16.788 INFO 4872 --- [ main] o.s.b.f.s.DefaultListableBeanFactory : Overriding bean definition for bean 'jobRepository' with a different definition: replacing [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration; factoryMethodName=jobRepository; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/batch/core/configuration/annotation/SimpleBatchConfiguration.class]] with [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=batchConfiguration; factoryMethodName=jobRepository; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [hello/BatchConfiguration.class]]
2017-07-02 15:02:16.788 INFO 4872 --- [ main] o.s.b.f.s.DefaultListableBeanFactory : Overriding bean definition for bean 'jobLauncher' with a different definition: replacing [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration; factoryMethodName=jobLauncher; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/batch/core/configuration/annotation/SimpleBatchConfiguration.class]] with [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=batchConfiguration; factoryMethodName=jobLauncher; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [hello/BatchConfiguration.class]]
2017-07-02 15:02:17.273 WARN 4872 --- [ main] o.s.c.a.ConfigurationClassEnhancer : @Bean method ScopeConfiguration.stepScope is non-static and returns an object assignable to Spring's BeanFactoryPostProcessor interface. This will result in a failure to process annotations such as @Autowired, @Resource and @PostConstruct within the method's declaring @Configuration class. Add the 'static' modifier to this method to avoid these container lifecycle issues; see @Bean javadoc for complete details.
2017-07-02 15:02:17.301 WARN 4872 --- [ main] o.s.c.a.ConfigurationClassEnhancer : @Bean method ScopeConfiguration.jobScope is non-static and returns an object assignable to Spring's BeanFactoryPostProcessor interface. This will result in a failure to process annotations such as @Autowired, @Resource and @PostConstruct within the method's declaring @Configuration class. Add the 'static' modifier to this method to avoid these container lifecycle issues; see @Bean javadoc for complete details.
2017-07-02 15:02:17.922 INFO 4872 --- [ main] o.s.b.c.l.support.SimpleJobLauncher : No TaskExecutor has been set, defaulting to synchronous executor.
2017-07-02 15:02:17.994 INFO 4872 --- [ main] hello.BatchConfiguration : Build Job
2017-07-02 15:02:17.996 INFO 4872 --- [ main] hello.BatchConfiguration : Build Step
2017-07-02 15:02:18.727 INFO 4872 --- [ main] o.s.jdbc.datasource.init.ScriptUtils : Executing SQL script from class path resource [org/springframework/batch/core/schema-h2.sql]
2017-07-02 15:02:18.826 INFO 4872 --- [ main] o.s.jdbc.datasource.init.ScriptUtils : Executed SQL script from class path resource [org/springframework/batch/core/schema-h2.sql] in 98 ms.
2017-07-02 15:02:19.130 INFO 4872 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2017-07-02 15:02:19.153 INFO 4872 --- [ main] o.s.b.a.b.JobLauncherCommandLineRunner : Running default command line with: []
2017-07-02 15:02:19.164 INFO 4872 --- [ main] o.s.b.c.r.s.JobRepositoryFactoryBean : No database type set, using meta data indicating: H2
2017-07-02 15:02:19.346 INFO 4872 --- [ main] o.s.b.c.l.support.SimpleJobLauncher : No TaskExecutor has been set, defaulting to synchronous executor.
2017-07-02 15:02:19.447 INFO 4872 --- [ main] o.s.b.c.l.support.SimpleJobLauncher : Job: [FlowJob: [name=importUserJob]] launched with the following parameters: [{run.id=1}]
2017-07-02 15:02:19.508 INFO 4872 --- [ main] o.s.batch.core.job.SimpleStepHandler : Executing step: [step]
Converting (firstName: Jill, lastName: Doe) into (firstName: JILL, lastName: DOE)
2017-07-02 15:02:19.557 INFO 4872 --- [ main] hello.PersonItemProcessor : Converting (firstName: Jill, lastName: Doe) into (firstName: JILL, lastName: DOE)
2017-07-02 15:02:19.558 INFO 4872 --- [ main] hello.LogItemWriter : [firstName: JILL, lastName: DOE]
Converting (firstName: Joe, lastName: Doe) into (firstName: JOE, lastName: DOE)
2017-07-02 15:02:19.565 INFO 4872 --- [ main] hello.PersonItemProcessor : Converting (firstName: Joe, lastName: Doe) into (firstName: JOE, lastName: DOE)
2017-07-02 15:02:19.565 INFO 4872 --- [ main] hello.LogItemWriter : [firstName: JOE, lastName: DOE]
Converting (firstName: Justin, lastName: Doe) into (firstName: JUSTIN, lastName: DOE)
2017-07-02 15:02:19.573 INFO 4872 --- [ main] hello.PersonItemProcessor : Converting (firstName: Justin, lastName: Doe) into (firstName: JUSTIN, lastName: DOE)
2017-07-02 15:02:19.573 INFO 4872 --- [ main] hello.LogItemWriter : [firstName: JUSTIN, lastName: DOE]
Converting (firstName: Jane, lastName: Doe) into (firstName: JANE, lastName: DOE)
2017-07-02 15:02:19.579 INFO 4872 --- [ main] hello.PersonItemProcessor : Converting (firstName: Jane, lastName: Doe) into (firstName: JANE, lastName: DOE)
2017-07-02 15:02:19.579 INFO 4872 --- [ main] hello.LogItemWriter : [firstName: JANE, lastName: DOE]
Converting (firstName: John, lastName: Doe) into (firstName: JOHN, lastName: DOE)
2017-07-02 15:02:19.586 INFO 4872 --- [ main] hello.PersonItemProcessor : Converting (firstName: John, lastName: Doe) into (firstName: JOHN, lastName: DOE)
2017-07-02 15:02:19.588 INFO 4872 --- [ main] hello.LogItemWriter : [firstName: JOHN, lastName: DOE]
2017-07-02 15:02:19.625 INFO 4872 --- [ main] o.s.b.c.l.support.SimpleJobLauncher : Job: [FlowJob: [name=importUserJob]] completed with the following parameters: [{run.id=1}] and the following status: [COMPLETED]
2017-07-02 15:02:19.653 INFO 4872 --- [ main] hello.Application : Started Application in 4.332 seconds (JVM running for 6.183)
2017-07-02 15:02:19.658 INFO 4872 --- [ Thread-3] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@45dd4eda: startup date [Sun Jul 02 15:02:16 IST 2017]; root of context hierarchy
2017-07-02 15:02:19.665 INFO 4872 --- [ Thread-3] o.s.j.e.a.AnnotationMBeanExporter : Unregistering JMX-exposed beans on shutdown
我在处理器中添加了一个sysout，因此可能会重复消息。