我正在发展Spring Boot v2.2.6.RELEASE + Spring Batch。在此示例中，我希望读取csv文件，将数据加载到mysql中，并将spring批处理元数据表加载到Postgres数据库中。
Spring Boot v2.2.6.RELEASE + Spring Batch
但这给了我错误：
java.lang.IllegalStateException: Failed to execute CommandLineRunner at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:787) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:768) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:322) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at com.example.SpringBatchMetadataInDiffSchemaApplication.main(SpringBatchMetadataInDiffSchemaApplication.java:27) [classes/:na] Caused by: org.springframework.jdbc.BadSqlGrammarException: PreparedStatementCallback; bad SQL grammar [SELECT JOB_INSTANCE_ID, JOB_NAME from BATCH_JOB_INSTANCE where JOB_NAME = ? and JOB_KEY = ?]; nested exception is org.postgresql.util.PSQLException: ERROR: relation "batch_job_instance" does not exist Position: 39 at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:235) ~[spring-jdbc-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72) ~[spring-jdbc-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.jdbc.core.JdbcTemplate.translateException(JdbcTemplate.java:1443) ~[spring-jdbc-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:633) ~[spring-jdbc-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:669) ~[spring-jdbc-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:700) ~[spring-jdbc-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:712) ~[spring-jdbc-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:768) ~[spring-jdbc-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.batch.core.repository.dao.JdbcJobInstanceDao.getJobInstance(JdbcJobInstanceDao.java:151) ~[spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE] at org.springframework.batch.core.repository.support.SimpleJobRepository.getLastJobExecution(SimpleJobRepository.java:271) ~[spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_171] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_171] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_171] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_171] at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344) ~[spring-aop-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198) ~[spring-aop-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:366) ~[spring-tx-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:99) ~[spring-tx-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) ~[spring-aop-5.2.2.RELEASE.jar:5.2.2.RELEASE] at com.sun.proxy.$Proxy61.getLastJobExecution(Unknown Source) ~[na:na] at org.springframework.batch.core.launch.support.SimpleJobLauncher.run(SimpleJobLauncher.java:104) ~[spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_171] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_171] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_171] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_171] at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344) ~[spring-aop-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198) ~[spring-aop-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration$PassthruAdvice.invoke(SimpleBatchConfiguration.java:127) ~[spring-batch-core-4.2.1.RELEASE.jar:4.2.1.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) ~[spring-aop-5.2.2.RELEASE.jar:5.2.2.RELEASE] at com.sun.proxy.$Proxy58.run(Unknown Source) ~[na:na] at com.example.SpringBatchMetadataInDiffSchemaApplication.run(SpringBatchMetadataInDiffSchemaApplication.java:36) [classes/:na] at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:784) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] ... 5 common frames omitted Caused by: org.postgresql.util.PSQLException: ERROR: relation "batch_job_instance" does not exist Position: 39 at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2497) ~[postgresql-42.2.8.jar:42.2.8] at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2233) ~[postgresql-42.2.8.jar:42.2.8] at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:310) ~[postgresql-42.2.8.jar:42.2.8] at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:446) ~[postgresql-42.2.8.jar:42.2.8] at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:370) ~[postgresql-42.2.8.jar:42.2.8] at org.postgresql.jdbc.PgPreparedStatement.executeWithFlags(PgPreparedStatement.java:149) ~[postgresql-42.2.8.jar:42.2.8] at org.postgresql.jdbc.PgPreparedStatement.executeQuery(PgPreparedStatement.java:108) ~[postgresql-42.2.8.jar:42.2.8] at com.zaxxer.hikari.pool.ProxyPreparedStatement.executeQuery(ProxyPreparedStatement.java:52) ~[HikariCP-3.4.1.jar:na] at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.executeQuery(HikariProxyPreparedStatement.java) ~[HikariCP-3.4.1.jar:na] at org.springframework.jdbc.core.JdbcTemplate$1.doInPreparedStatement(JdbcTemplate.java:678) ~[spring-jdbc-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:617) ~[spring-jdbc-5.2.2.RELEASE.jar:5.2.2.RELEASE] ... 37 common frames omitted
JobConfig.java
@Configuration public class JobConfig { @Autowired private StepBuilderFactory stepBuilderFactory; @Autowired private JobBuilderFactory jobBuilderFactory; @Qualifier("secondaryDS") @Autowired private DataSource dataSource; @Bean public FlatFileItemReader<Customer> customerItemReader(){ FlatFileItemReader<Customer> reader = new FlatFileItemReader<>(); reader.setLinesToSkip(1); reader.setResource(new ClassPathResource("/data/customer.csv")); DelimitedLineTokenizer tokenizer = new DelimitedLineTokenizer(); tokenizer.setNames(new String[] {"id", "firstName", "lastName", "birthdate"}); DefaultLineMapper<Customer> customerLineMapper = new DefaultLineMapper<>(); customerLineMapper.setLineTokenizer(tokenizer); customerLineMapper.setFieldSetMapper(new CustomerFieldSetMapper()); customerLineMapper.afterPropertiesSet(); reader.setLineMapper(customerLineMapper); return reader; } @Bean public JdbcBatchItemWriter<Customer> customerItemWriter(){ JdbcBatchItemWriter<Customer> writer = new JdbcBatchItemWriter<>(); writer.setDataSource(this.dataSource); writer.setSql("INSERT INTO CUSTOMER VALUES (:id, :firstName, :lastName, :birthdate)"); writer.setItemSqlParameterSourceProvider(new BeanPropertyItemSqlParameterSourceProvider<>()); writer.afterPropertiesSet(); return writer; } @Bean public Step step1() { return stepBuilderFactory.get("step1") .<Customer, Customer> chunk(1000) .reader(customerItemReader()) .writer(customerItemWriter()) .build(); } @Bean public Job job() { return jobBuilderFactory.get("job") .start(step1()) .build(); } }
数据库配置文件
@Configuration public class DatabaseConfig { @Autowired private Environment env; // For Test schema @Bean(name="secondaryDS") @ConfigurationProperties(prefix="spring.datasource") public DataSource getSeconadaryBatchDataSource(){ return DataSourceBuilder.create() .url(env.getProperty("spring.datasource.url")) .driverClassName(env.getProperty("spring.datasource.driver-class-name")) .username(env.getProperty("spring.datasource.username")) .password(env.getProperty("spring.datasource.password")) .build(); } // For "batchmetadata" tables @Bean(name="primaryDS") @Primary @ConfigurationProperties(prefix="spring.hello.datasource") public DataSource getPrimaryBatchDataSource(){ return DataSourceBuilder.create() .url(env.getProperty("spring.hello.datasource.url")) .driverClassName(env.getProperty("spring.hello.datasource.driver-class-name")) .username(env.getProperty("spring.hello.datasource.username")) .password(env.getProperty("spring.hello.datasource.password")) .build(); } //Ref: https://stackoverflow.com/questions/28275448/multiple-data-source-and-schema-creation-in-spring-boot @Bean(name = "primaryEntityManagerFactory") public LocalContainerEntityManagerFactoryBean primaryEntityManagerFactory( EntityManagerFactoryBuilder builder) { Map<String, Object> properties = new HashMap<>(); properties.put("hibernate.hbm2ddl.auto", "update"); return builder .dataSource(getSeconadaryBatchDataSource()) .packages("com.example.model") .persistenceUnit("default") .properties(properties) .build(); } /*@Bean(name = "secondaryEntityManagerFactory") @Primary public LocalContainerEntityManagerFactoryBean secondaryEntityManagerFactory( EntityManagerFactoryBuilder builder) { Map<String, Object> properties = new HashMap<String, Object>(); properties.put("hibernate.hbm2ddl.auto", "create"); return builder .dataSource(getPrimaryBatchDataSource()) .packages("com.example.model") .persistenceUnit("default") .properties(properties) .build(); }*/ }
application.properties
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver spring.datasource.url=jdbc:mysql://localhost:3306/test spring.datasource.username=root spring.datasource.password=root spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect spring.jpa.hibernate.ddl-auto=create spring.jpa.show-sql=true spring.jpa.properties.hibernate.format_sql=true # Postgres spring.hello.datasource.driver-class-name=org.postgresql.Driver spring.hello.datasource.url=jdbc:postgresql://localhost:5432/program?currentSchema=BATCH spring.hello.datasource.username=postgres spring.hello.datasource.password=admin #spring.batch.table-prefix=batchmetadata.BATCH_ spring.batch.initialize-schema=always spring.batch.job.enabled=false spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl spring.jpa.hibernate.naming.implicit-strategy=org.hibernate.boot.model.naming.ImplicitNamingStrategyLegacyJpaImpl
也许您正在使用诸如“ BATCH_JOB_INSTANCE”之类的引号创建表。还要检查是否指定了架构，datasource.url因为您没有在查询中使用架构名称。
datasource.url
