由于某种原因,在对基于HSQL数据库的文件进行更改并关闭java进程后,似乎没有任何内容保存在数据库中。 I.E.我可以反复重新运行此程序,而不会遇到“表已存在”异常。到底是怎么回事?!
主要课程:
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.jdbc.core.JdbcTemplate;
import java.io.IOException;
import java.sql.SQLException;
public class TestApp {
public static void main(String[] args) throws IOException, SQLException, ClassNotFoundException {
AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(DbConfig.class, TestDao.class);
JdbcTemplate template = ctx.getBean(JdbcTemplate.class);
TestDao dao = ctx.getBean(TestDao.class);
dao.testTransactionality();
}
}
配置:
import org.apache.commons.dbcp.BasicDataSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
import javax.sql.DataSource;
@Configuration
public class DbConfig {
@Bean
public DataSource getDataSource(){
BasicDataSource ds = new BasicDataSource();
ds.setDriverClassName("org.hsqldb.jdbcDriver");
ds.setUrl("jdbc:hsqldb:file:databaseFiles/test/");
ds.setUsername("sa");
ds.setPassword("1");
return ds;
}
@Bean
JdbcTemplate getJdbcTemplate(DataSource ds){
return new JdbcTemplate(ds);
}
@Bean
PlatformTransactionManager getTransactionManager(DataSource dataSource){
return new DataSourceTransactionManager(dataSource);
}
}
DAO:
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.transaction.annotation.Transactional;
@Repository
@EnableTransactionManagement
@Transactional
public class TestDao {
@Autowired
private JdbcTemplate template;
@Transactional
public void testTransactionality(){
template.execute("create table LIBRARY (LIBRARY_ID INT, LIBRARY_TITLE VARCHAR(400))");
template.execute("insert into library values (1, 'Library')");
}
}
我尝试过使用普通的JDBC类做类似的事情以及进行显式提交,似乎没有任何帮助。我猜这是一个HSQLDB问题。请帮忙
答案 0 :(得分:1)
您的数据库网址不太正确(不应以斜杠结尾)。您还应将写入延迟更改为0以查看更改:
ds.setUrl("jdbc:hsqldb:file:databaseFiles/test;hsqldb.write_delay_millis=0");