我有以下的ItemReader类
@Configuration
public class ReadingObjectItemReader extends JdbcCursorItemReader<Person> {
public DataSource getDataSource() { return dataSource; }
@Resource
public void setDataSource(DataSource dataSource) { super.setDataSource(dataSource); }
@Autowired
DataSource dataSource;
@Bean
public JdbcCursorItemReader<Person> cursorReader() {
JdbcCursorItemReader<Person> databaseReader = new JdbcCursorItemReader<>();
databaseReader.setDataSource(dataSource);
databaseReader.setSql("select TOP(10) * from dbo.Person ");
databaseReader.setFetchSize(5);
databaseReader.setRowMapper(new BeanPropertyRowMapper<>(Person.class));
return databaseReader;
}
}
当我在我的代码库中运行上述代码作为 itemReader 的时候,我得到的是
Caused by: java.lang.IllegalArgumentException: The SQL query must be provided
这是完整的堆栈跟踪。
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'readingObjectItemReader' defined in file [\demo-project\bin\main\com\spring-batch\test\config\ReadingObjectItemReader.class]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: The SQL query must be provided
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1796) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:226) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:895) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143) ~[spring-boot-2.3.1.BUILD-SNAPSHOT.jar:2.3.1.BUILD-SNAPSHOT]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758) ~[spring-boot-2.3.1.BUILD-SNAPSHOT.jar:2.3.1.BUILD-SNAPSHOT]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750) ~[spring-boot-2.3.1.BUILD-SNAPSHOT.jar:2.3.1.BUILD-SNAPSHOT]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.3.1.BUILD-SNAPSHOT.jar:2.3.1.BUILD-SNAPSHOT]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) ~[spring-boot-2.3.1.BUILD-SNAPSHOT.jar:2.3.1.BUILD-SNAPSHOT]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) ~[spring-boot-2.3.1.BUILD-SNAPSHOT.jar:2.3.1.BUILD-SNAPSHOT]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) ~[spring-boot-2.3.1.BUILD-SNAPSHOT.jar:2.3.1.BUILD-SNAPSHOT]
at gov.va.med.ccrs.pit.extract.CcrsPitextractApplication.main(CcrsPitextractApplication.java:12) ~[main/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-2.3.1.BUILD-SNAPSHOT.jar:2.3.1.BUILD-SNAPSHOT]
Caused by: java.lang.IllegalArgumentException: The SQL query must be provided
at org.springframework.util.Assert.notNull(Assert.java:198) ~[spring-core-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.batch.item.database.JdbcCursorItemReader.afterPropertiesSet(JdbcCursorItemReader.java:108) ~[spring-batch-infrastructure-4.2.2.RELEASE.jar:4.2.2.RELEASE]
at gov.va.med.ccrs.pit.extract.config.ReadingObjectItemReader.afterPropertiesSet(ReadingObjectItemReader.java:58) ~[main/:na]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1855) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1792) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
... 22 common frames omitted
我是否需要添加什么东西才能让这段代码正常工作?先谢谢你。
我能够通过不扩展JdbcCursorItemReader和从我定义了步骤的类中传递数据源来使其工作。
在做了修正之后,这个类看起来是这样的。
@Configuration
public class ReadingObjectItemReader {
@Bean
ItemReader<Person> cursorReaderForDb(DataSource dataSource) {
String sql = "select TOP(10) * from dbo.Person ";
JdbcCursorItemReader<Person> cursor = new JdbcCursorItemReader<Person>();
cursor.setDataSource(dataSource);
cursor.setSql(sql);
cursor.setRowMapper(new BeanPropertyRowMapper<>(Person.class));
cursor.setFetchSize(10);
return cursor;
}
}
我知道这是一个奇怪的行为。我还是想通过扩展JdbcCursorItemReader让它工作。所以,任何使其正确的建议都会被感激。