Question

不确定我缺少什么...请帮助...

我已经有一个使用一个数据库的应用程序。现在，我要添加另一个数据库。以下是错误消息（服务器在启动时终止），当我添加额外的代码以获取新的数据源时，我会收到错误消息。

application.properties

# === Existing DATA SOURCE (SQL SERVER) ===
spring.datasource.driverClassName=com.ibm.db2.jcc.DB2Driver
spring.datasource.url=jdbc:sqlserver://mysqlserver/mydb
spring.datasource.username=user1
spring.datasource.password=passwrd

# === New DATA SOURCE (SQL SERVER) ===  ADDING THIS DTASOURCE CODE
spring.db2Datasource.driverClassName=com.ibm.db2.jcc.DB2Driver
spring.db2Datasource.url=jdbc:db2://mydb2server/mydb
spring.db2Datasource.username=user1
spring.db2Datasource.password=passwrd

创建了这个新类： DatasourceConfig.java

@Configuration
public class DatasourceConfig {
    @Bean
    @Primary
    @ConfigurationProperties(prefix="spring.datasource")
    public DataSource primaryDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean
    @ConfigurationProperties(prefix="spring.db2Datasource")
    public DataSource secondaryDataSource() {
        return DataSourceBuilder.create().build();
    }
}

I have not doe any changes in my main class:
@SpringBootApplication(exclude = {SecurityAutoConfiguration.class })
@ComponentScan(basePackages="com.my.company")
public class SpringBootAFSApplication {
    public static void main(String[] args) {
        SpringApplication.run(SpringBootStudentApplication.class, args);
    }
}

错误：

2019-02-11 14:43:33.323 ERROR 680 --- [ost-startStop-1] o.s.b.web.embedded.tomcat.TomcatStarter  : Error starting Tomcat context. Exception: org.springframework.beans.factory.BeanCreationException. Message: Error creating bean with name 'servletEndpointRegistrar' defined in class path resource [org/springframework/boot/actuate/autoconfigure/endpoint/web/ServletEndpointManagementContextConfiguration$WebMvcServletEndpointManagementContextConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.actuate.endpoint.web.ServletEndpointRegistrar]: Factory method 'servletEndpointRegistrar' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'healthEndpoint' defined in class path resource [org/springframework/boot/actuate/autoconfigure/health/HealthEndpointConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.actuate.health.HealthEndpoint]: Factory method 'healthEndpoint' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.actuate.autoconfigure.jdbc.DataSourceHealthIndicatorAutoConfiguration': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.actuate.autoconfigure.jdbc.DataSourceHealthIndicatorAutoConfiguration$$EnhancerBySpringCGLIB$$75412098]: Constructor threw exception; nested exception is org.springframework.boot.context.properties.ConfigurationPropertiesBindException: Error creating bean with name 'secondaryDataSource': Could not bind properties to 'HikariDataSource' : prefix=spring.db2Datasource, ignoreInvalidFields=false, ignoreUnknownFields=true; nested exception is org.springframework.boot.context.properties.source.InvalidConfigurationPropertyNameException: Configuration property name 'spring.db2Datasource' is not valid

JdbcStudentRepository.java

@Repository("Student")
public class JdbcStudentRepository implements StudentRepository {
    private GeneratedKeyHolder keyHolder = new GeneratedKeyHolder();
    private NamedParameterJdbcTemplate jdbcTemplate;


    @Autowired
    public JdbcStudentRepository(NamedParameterJdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }

    public int count(){
        return this.jdbcTemplate.queryForObject("select count(1) from STUDENT", Collections.emptyMap(), Integer.class);
    }

Answer 1

似乎您正在使用Hikari数据源：

无法将属性绑定到“ HikariDataSource”

根据文档，您需要具有稍微不同的配置：

此外，如果您碰巧在类路径上有Hikari，则此基本设置不起作用，因为Hikari没有url属性（但确实有一个 jdbcUrl属性）。在这种情况下，您必须重写配置如下：
app.datasource.jdbc-url=jdbc:mysql://localhost/test
app.datasource.username=dbuser app.datasource.password=dbpass
app.datasource.maximum-pool-size=30

完整信息和其他实施选项可以在here

中找到

Answer 2

根据documentation，您的前缀错误应该是这样的：

db.datasource.driverClassName=com.ibm.db2.jcc.DB2Driver
db.datasource.url=jdbc:db2://mydb2server/mydb
db.datasource.username=user1
db.datasource.password=passwrd

并更新以下行：

@Bean
@ConfigurationProperties(prefix="db.datasource")
public DataSource secondaryDataSource() {
    return DataSourceBuilder.create().build();
}

Spring Boot：多个数据源-服务器在启动之前终止

2 个答案: