在 Spring 启动时配置数据源
Configure Data Source in Spring boot
我有一个 spring 启动应用程序，
目前正在为数据源使用此配置
@PropertySource("file:D:\Spring Workspace\test\dbconfig.properties")
public class DataSourceConfig {
@Value("db_driverClassName")
private String className;
@Value("db_url")
private String url;
@Value("db_username")
private String username;
@Value("db_userpassword")
private String password;
@Bean
public DataSource getDataSource() {
dataSourceBuilder.driverClassName(className);
dataSourceBuilder.url(url);
dataSourceBuilder.username(username);
dataSourceBuilder.password(password);
return dataSourceBuilder.build();
}
}
dbconfig.properties 文件
db_driverClassName="org.postgresql.Driver"
db_url="jdbc:postgresql://localhost:5432/testDB"
db_username="postgres"
db_userpassword="password"
异常
2021-07-15 12:34:21.400 ERROR 5352 --- [ main] com.zaxxer.hikari.HikariConfig : Failed to load driver class db_driverClassName from HikariConfig class classloader jdk.internal.loader.ClassLoaders$AppClassLoader@368239c8
2021-07-15 12:34:21.403 WARN 5352 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'dataSourceScriptDatabaseInitializer' defined in class path resource [org/springframework/boot/autoconfigure/sql/init/DataSourceInitializationConfiguration.class]: Unsatisfied dependency expressed through method 'dataSourceScriptDatabaseInitializer' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'getDataSource' defined in class path resource [com/myapp/quartz/config/DataSourceConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.sql.DataSource]: Factory method 'getDataSource' threw exception; nested exception is java.lang.RuntimeException: Failed to load driver class db_driverClassName in either of HikariConfig class loader or Thread context classloader
2021-07-15 12:34:21.405 INFO 5352 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2021-07-15 12:34:21.418 INFO 5352 --- [ main] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-07-15 12:34:21.437 ERROR 5352 --- [ main] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'dataSourceScriptDatabaseInitializer' defined in class path resource [org/springframework/boot/autoconfigure/sql/init/DataSourceInitializationConfiguration.class]: Unsatisfied dependency expressed through method 'dataSourceScriptDatabaseInitializer' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'getDataSource' defined in class path resource [com/myapp/quartz/config/DataSourceConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.sql.DataSource]: Factory method 'getDataSource' threw exception; nested exception is java.lang.RuntimeException: Failed to load driver class db_driverClassName in either of HikariConfig class loader or Thread context classloader
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:541) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1334) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:564) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean[=13=](AbstractBeanFactory.java:335) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1154) ~[spring-context-5.3.8.jar:5.3.8]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:908) ~[spring-context-5.3.8.jar:5.3.8]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.8.jar:5.3.8]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.5.2.jar:2.5.2]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) ~[spring-boot-2.5.2.jar:2.5.2]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:434) ~[spring-boot-2.5.2.jar:2.5.2]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:338) ~[spring-boot-2.5.2.jar:2.5.2]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343) ~[spring-boot-2.5.2.jar:2.5.2]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1332) ~[spring-boot-2.5.2.jar:2.5.2]
at com.myapp.quartz.GatewayApplication.main(GatewayApplication.java:17) ~[classes/:na]
我尝试通过手动设置值而不是将其放入文件中，这很有效，但是当我尝试从文件中获取属性值时，我遇到了这个异常。
您需要从属性值中删除引号
db_driverClassName=org.postgresql.Driver
db_url=jdbc:postgresql://localhost:5432/testDB
db_username=postgres
db_userpassword=password
这里使用相对路径而不是绝对路径
@PropertySource("file:D:\Spring Workspace\test\dbconfig.properties")
并删除 dbconfig.properties file
中的双引号
我想在答案中再补充一点，在提出来自@user7294900 的解决方案后，我仍然因此遇到了问题，终于解决了
属性文件中值的映射，我使用了错误的语法
@Value("db_driverClassName")
改为
@Value("${db_driverClassName}")
我有一个 spring 启动应用程序，
目前正在为数据源使用此配置
@PropertySource("file:D:\Spring Workspace\test\dbconfig.properties")
public class DataSourceConfig {
@Value("db_driverClassName")
private String className;
@Value("db_url")
private String url;
@Value("db_username")
private String username;
@Value("db_userpassword")
private String password;
@Bean
public DataSource getDataSource() {
dataSourceBuilder.driverClassName(className);
dataSourceBuilder.url(url);
dataSourceBuilder.username(username);
dataSourceBuilder.password(password);
return dataSourceBuilder.build();
}
}
dbconfig.properties 文件
db_driverClassName="org.postgresql.Driver"
db_url="jdbc:postgresql://localhost:5432/testDB"
db_username="postgres"
db_userpassword="password"
异常
2021-07-15 12:34:21.400 ERROR 5352 --- [ main] com.zaxxer.hikari.HikariConfig : Failed to load driver class db_driverClassName from HikariConfig class classloader jdk.internal.loader.ClassLoaders$AppClassLoader@368239c8
2021-07-15 12:34:21.403 WARN 5352 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'dataSourceScriptDatabaseInitializer' defined in class path resource [org/springframework/boot/autoconfigure/sql/init/DataSourceInitializationConfiguration.class]: Unsatisfied dependency expressed through method 'dataSourceScriptDatabaseInitializer' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'getDataSource' defined in class path resource [com/myapp/quartz/config/DataSourceConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.sql.DataSource]: Factory method 'getDataSource' threw exception; nested exception is java.lang.RuntimeException: Failed to load driver class db_driverClassName in either of HikariConfig class loader or Thread context classloader
2021-07-15 12:34:21.405 INFO 5352 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2021-07-15 12:34:21.418 INFO 5352 --- [ main] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-07-15 12:34:21.437 ERROR 5352 --- [ main] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'dataSourceScriptDatabaseInitializer' defined in class path resource [org/springframework/boot/autoconfigure/sql/init/DataSourceInitializationConfiguration.class]: Unsatisfied dependency expressed through method 'dataSourceScriptDatabaseInitializer' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'getDataSource' defined in class path resource [com/myapp/quartz/config/DataSourceConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.sql.DataSource]: Factory method 'getDataSource' threw exception; nested exception is java.lang.RuntimeException: Failed to load driver class db_driverClassName in either of HikariConfig class loader or Thread context classloader
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:541) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1334) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:564) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean[=13=](AbstractBeanFactory.java:335) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1154) ~[spring-context-5.3.8.jar:5.3.8]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:908) ~[spring-context-5.3.8.jar:5.3.8]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.8.jar:5.3.8]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.5.2.jar:2.5.2]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) ~[spring-boot-2.5.2.jar:2.5.2]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:434) ~[spring-boot-2.5.2.jar:2.5.2]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:338) ~[spring-boot-2.5.2.jar:2.5.2]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343) ~[spring-boot-2.5.2.jar:2.5.2]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1332) ~[spring-boot-2.5.2.jar:2.5.2]
at com.myapp.quartz.GatewayApplication.main(GatewayApplication.java:17) ~[classes/:na]
我尝试通过手动设置值而不是将其放入文件中，这很有效，但是当我尝试从文件中获取属性值时，我遇到了这个异常。
您需要从属性值中删除引号
db_driverClassName=org.postgresql.Driver
db_url=jdbc:postgresql://localhost:5432/testDB
db_username=postgres
db_userpassword=password
这里使用相对路径而不是绝对路径
@PropertySource("file:D:\Spring Workspace\test\dbconfig.properties")
并删除 dbconfig.properties file
我想在答案中再补充一点，在提出来自@user7294900 的解决方案后，我仍然因此遇到了问题，终于解决了
属性文件中值的映射，我使用了错误的语法
@Value("db_driverClassName")
改为
@Value("${db_driverClassName}")