我想作一个DatabaseConfig类设置我的数据库相关的东西(的EntityManager,数据源,事务管理器),并让我用@Value("${property.name}")
上String
字段属性
喜欢
@Configuration
public class DataBaseConfig {
@Value("${hibernate.connection.username}")
private String hibernateConnectionUsername;
@Value("${hibernate.connection.password}")
private String hibernateConnectionPassword;
@Value("${hibernate.connection.driver_class}")
private String hibernateConnectionDriverClass;
@Value("${hibernate.connection.url}")
private String hibernateConnectionUrl;
@Value("${hibernate.dialect}")
private String hibernateDialect;
@Value("${hibernate.showSql}")
private String hibernateShowSql;
@Value("${hibernate.generateDdl}")
private String hibernateGenerateDdl;
// All my @Beans
}
问题是,所有这些字符串是空的,而不是我的属性文件的值。
如果我把代码放到我的Application
类(具有main
和SpringApplication.run(Application.class, args);
引用的一个)的值注入作品
总之,@Value工作在我的应用程序类,但不是在我的自定义@Configuration类:(
可能是什么问题?或者,更多的信息需要?
更新:更多的代码
方式1,DB配置和@Value我Application.java工作与不PropertySourcesPlaceholderConfigurer
import java.beans.PropertyVetoException;
import javax.persistence.EntityManagerFactory;
import javax.sql.DataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;
import com.mchange.v2.c3p0.ComboPooledDataSource;
@Configuration
@ComponentScan
@EnableJpaRepositories
@EnableAutoConfiguration(exclude = HibernateJpaAutoConfiguration.class)
public class Application {
public static void main(String[] args) throws Throwable {
SpringApplication.run(Application.class, args);
}
// @Bean
// public static PropertySourcesPlaceholderConfigurer properties() {
// PropertySourcesPlaceholderConfigurer pspc = new PropertySourcesPlaceholderConfigurer();
// pspc.setLocations(new Resource[] { new ClassPathResource("application.properties") });
// return pspc;
// }
/*****************************/
@Value("${hibernate.connection.username}")
private String hibernateConnectionUsername;
@Value("${hibernate.connection.password}")
private String hibernateConnectionPassword;
@Value("${hibernate.connection.driver_class}")
private String hibernateConnectionDriverClass;
@Value("${hibernate.connection.url}")
private String hibernateConnectionUrl;
@Value("${hibernate.dialect}")
private String hibernateDialect;
@Value("${hibernate.showSql}")
private String hibernateShowSql;
@Value("${hibernate.generateDdl}")
private String hibernateGenerateDdl;
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
vendorAdapter.setDatabasePlatform(hibernateDialect);
boolean generateDdl = Boolean.parseBoolean(hibernateGenerateDdl);
boolean showSql = Boolean.parseBoolean(hibernateShowSql);
vendorAdapter.setGenerateDdl(generateDdl);
vendorAdapter.setShowSql(showSql);
LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
factory.setJpaVendorAdapter(vendorAdapter);
factory.setDataSource(dataSource());
factory.setPackagesToScan("xxx");
return factory;
}
@Bean
public DataSource dataSource() {
ComboPooledDataSource dataSource = new ComboPooledDataSource();
dataSource.setUser(hibernateConnectionUsername);
dataSource.setPassword(hibernateConnectionPassword);
try {
dataSource.setDriverClass(hibernateConnectionDriverClass);
} catch (PropertyVetoException e) {
throw new IllegalArgumentException("Wrong driver class");
}
dataSource.setJdbcUrl(hibernateConnectionUrl);
return dataSource;
}
@Bean
public PlatformTransactionManager transactionManager(EntityManagerFactory entityManagerFactory) {
return new JpaTransactionManager(entityManagerFactory);
}
}
方式2(我想有),DB的东西,在它自己的文件(DatabaseConfing.java)不工作的地方我有PropertySourcesPlaceholderConfigurer
(应用程序或DatabaseConfig),因为它总是被称为DatabaseConfig内@Beans后regardles :(
import java.beans.PropertyVetoException;
import java.util.ArrayList;
import java.util.List;
import javax.sql.DataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.core.type.filter.AnnotationTypeFilter;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import com.mchange.v2.c3p0.ComboPooledDataSource;
@Configuration
public class DatabaseConfig {
@Value("${hibernate.connection.username}")
private String hibernateConnectionUsername;
@Value("${hibernate.connection.password}")
private String hibernateConnectionPassword;
@Value("${hibernate.connection.driver_class}")
private String hibernateConnectionDriverClass;
@Value("${hibernate.connection.url}")
private String hibernateConnectionUrl;
@Value("${hibernate.dialect")
private String hibernateDialect;
@Value("${hibernate.showSql}")
private String hibernateShowSql;
@Value("${hibernate.generateDdl}")
private String hibernateGenerateDdl;
// @Bean
// public static PropertySourcesPlaceholderConfigurer properties() {
// PropertySourcesPlaceholderConfigurer pspc = new PropertySourcesPlaceholderConfigurer();
// pspc.setLocations(new Resource[] { new ClassPathResource("application.properties") });
// return pspc;
// }
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
vendorAdapter.setDatabasePlatform(hibernateDialect);
boolean generateDdl = Boolean.parseBoolean(hibernateGenerateDdl);
boolean showSql = Boolean.parseBoolean(hibernateShowSql);
vendorAdapter.setGenerateDdl(generateDdl);
vendorAdapter.setShowSql(showSql);
LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
factory.setJpaVendorAdapter(vendorAdapter);
factory.setDataSource(dataSource());
factory.setPackagesToScan("xxx");
return factory;
}
@Bean
public DataSource dataSource() {
ComboPooledDataSource dataSource = new ComboPooledDataSource();
dataSource.setUser(hibernateConnectionUsername);
dataSource.setPassword(hibernateConnectionPassword);
try {
dataSource.setDriverClass(hibernateConnectionDriverClass);
} catch (PropertyVetoException e) {
throw new IllegalArgumentException("Wrong driver class");
}
System.err.println(hibernateConnectionUrl);
dataSource.setJdbcUrl(hibernateConnectionUrl);
return dataSource;
}
}
而不是你的DatabaseConfig
添加以下application.properties
到src/main/resources
(从而删除您DatabaseConfig
类)
#DataSource configuration
spring.datasource.driverClassName=<hibernateConnectionDriverClass>
spring.datasource.url=<hibernateConnectionUrl>
spring.datasource.username=<hibernateConnectionUsername>
spring.datasource.password=<hibernateConnectionPassword>
#JPA/HIbernate
spring.jpa.database-platform=<dialect-class>
spring.jpa.generate-ddl=<hibernateGenerateDdl>
spring.jpa.show-sql=<hibernateShowSql>
替换<占位符>与实际值和春季启动会照顾这。
尖移开C3P0依赖性,Spring将提供给您(默认)跟tomcat连接池(这是更新,更activly维持,尽管名称是不完全可用/ Tomcat的之外)。
@Import({ CacheConfig.class, DatabaseConfig.class })
@ComponentScan(excludeFilters = @Filter(Configuration.class))
没有的伎俩。