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Question

我正在开发 Spring Boot Batch 示例。在此示例中，出现以下错误。使用 spring-boot-starter-parent 是 2.0.3.RELEASE 。

我怀疑Spring Boot期望自动创建表，但是无法创建表，因此出现以下错误。

任何简单的快速指南？

java.lang.IllegalStateException: Failed to execute CommandLineRunner
    at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:800) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:781) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:335) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at com.prateek.SpringBatchCsvDatabaseApplication.main(SpringBatchCsvDatabaseApplication.java:14) [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 = ? order by JOB_INSTANCE_ID desc]; nested exception is java.sql.SQLSyntaxErrorException: Table 'test.batch_job_instance' doesn't exist
    at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:234) ~[spring-jdbc-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72) ~[spring-jdbc-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate.translateException(JdbcTemplate.java:1402) ~[spring-jdbc-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:620) ~[spring-jdbc-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:657) ~[spring-jdbc-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:688) ~[spring-jdbc-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:700) ~[spring-jdbc-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.batch.core.repository.dao.JdbcJobInstanceDao.getJobInstances(JdbcJobInstanceDao.java:230) ~[spring-batch-core-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.batch.core.explore.support.SimpleJobExplorer.getJobInstances(SimpleJobExplorer.java:173) ~[spring-batch-core-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_151]
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_151]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_151]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_151]
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:343) ~[spring-aop-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:197) ~[spring-aop-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration$PassthruAdvice.invoke(SimpleBatchConfiguration.java:127) ~[spring-batch-core-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185) ~[spring-aop-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) ~[spring-aop-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at com.sun.proxy.$Proxy50.getJobInstances(Unknown Source) ~[na:na]
    at org.springframework.batch.core.JobParametersBuilder.getNextJobParameters(JobParametersBuilder.java:254) ~[spring-batch-core-4.0.1.RELEASE.jar:4.0.1.RELEASE]
    at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.execute(JobLauncherCommandLineRunner.java:162) ~[spring-boot-autoconfigure-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.executeLocalJobs(JobLauncherCommandLineRunner.java:179) ~[spring-boot-autoconfigure-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.launchJobFromProperties(JobLauncherCommandLineRunner.java:134) ~[spring-boot-autoconfigure-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.run(JobLauncherCommandLineRunner.java:128) ~[spring-boot-autoconfigure-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:797) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    ... 5 common frames omitted
Caused by: java.sql.SQLSyntaxErrorException: Table 'test.batch_job_instance' doesn't exist
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:118) ~[mysql-connector-java-8.0.11.jar:8.0.11]
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:95) ~[mysql-connector-java-8.0.11.jar:8.0.11]
    at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122) ~[mysql-connector-java-8.0.11.jar:8.0.11]
    at com.mysql.cj.jdbc.ClientPreparedStatement.executeInternal(ClientPreparedStatement.java:960) ~[mysql-connector-java-8.0.11.jar:8.0.11]
    at com.mysql.cj.jdbc.ClientPreparedStatement.executeQuery(ClientPreparedStatement.java:1019) ~[mysql-connector-java-8.0.11.jar:8.0.11]
    at com.zaxxer.hikari.pool.ProxyPreparedStatement.executeQuery(ProxyPreparedStatement.java:52) ~[HikariCP-2.7.9.jar:na]
    at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.executeQuery(HikariProxyPreparedStatement.java) ~[HikariCP-2.7.9.jar:na]
    at org.springframework.jdbc.core.JdbcTemplate$1.doInPreparedStatement(JdbcTemplate.java:666) ~[spring-jdbc-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:605) ~[spring-jdbc-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    ... 27 common frames omitted

database.properties。。我正在使用mysql 8.0.x版本

数据源

spring.datasource.url=jdbc:mysql://localhost:3306/test?useSSL=false
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

BatchConfig.java

@Configuration
@EnableBatchProcessing
public class BatchConfig {

    @Bean
    Job job(JobBuilderFactory jobBuilderFactory, StepBuilderFactory stepBuilderFactory, Step step1) throws Exception {

        TaskletStep s1 = stepBuilderFactory.get("file-db")
                .<Student, Student>chunk(100)
                .reader(step1.fileItemReader(null))
                .writer(step1.batchItemWriter(null))
                .build();

        return jobBuilderFactory.get("etl")
                .incrementer(new RunIdIncrementer())
                .start(s1)
                .build();
    }
}

Step.java

@Configuration
public class Step {

    @Bean
    public FlatFileItemReader<Student> fileItemReader(@Value("${input}") Resource resource){
        return new FlatFileItemReaderBuilder<Student>()
                .name("file-reader")
                .resource(resource)
                .targetType(Student.class)
                .linesToSkip(1)
                .delimited().delimiter(",").names(new String[]{"firstName", "lastName",  "email", "age"})
                .build();
    }

    @Bean
    public JdbcBatchItemWriter<Student> batchItemWriter(DataSource dataSource){
        return new JdbcBatchItemWriterBuilder<Student>()
                .dataSource(dataSource)
                .sql("INSERT INTO STUDENT (FIRST_NAME, LAST_NAME, EMAIL, AGE) VALUES (:firstName, :lastName, :email, :age)")
                .beanMapped()
                .build();
    }

}

SpringBatchCsvDatabaseApplication.java

@SpringBootApplication 公共类SpringBatchCsvDatabaseApplication {

public static void main(String[] args) {

    System.setProperty("input", "file://" + new File("C:/Users/pc/students.csv").getAbsolutePath());
    SpringApplication.run(SpringBatchCsvDatabaseApplication.class, args);
}

}

Answer 1

我认为默认情况下，Spring将仅在运行嵌入式数据库时初始化架构。使用任何其他数据库时，您需要明确告诉它创建架构。您可以尝试设置此属性，看看是否可以帮助您struct B {int b1, b2;}; struct A { std::set<B, compBLess> m_setLess; std::set<B, compBGreater> m_setGreater; void onFirst(int val) { auto i_set = m_setLess.begin(); auto comp = [&](){ return val >= i_set->b1; }; while ( i_set != m_setLess.end() && comp() ) { sameForBoth(*i_set); ++i_set; } } void onSecond(int val) { auto i_set = m_setGreater.begin(); auto comp = [&](){ return val <= i_set->b1; }; while ( i_set != m_setGreater.end() && comp() ) { sameForBoth(*i_set); ++i_set; } } void sameForBoth() {} };。

在这里查看更多信息：https://docs.spring.io/spring-boot/docs/2.0.3.RELEASE/reference/htmlsingle/#howto-database-initialization

Answer 2

您报告的错误与Spring Batch元数据表有关，而不是与应用程序表有关。我认为您需要遵循以下问题的建议：Spring Batch Framework - Auto create Batch Table

由以下原因引起：org.springframework.jdbc.BadSqlGrammarException：PreparedStatementCallback;错误的SQL语法[SELECT JOB_INSTANCE_ID，

数据源

2 个答案: