无法识别Spring Data JDBC Firebird方言 [英] Spring Data JDBC Firebird dialect not recognized
问题描述
我正在尝试使用Spring Data JDBC和Spring Boot连接到Firebird数据库.
我已经使用Spring Tools创建了一个简单的应用程序. Spring Data JDBC无法识别方言.我相信问题在于DialectResolver
不支持Firebird.
I'm trying to connect to Firebird database using Spring Data JDBC and Spring Boot.
I've created a simple app using Spring Tools. Spring Data JDBC doesn't recognize the dialect. I believe the problem is that the DialectResolver
doesn't support Firebird.
private static Dialect getDialect(Connection connection) throws SQLException {
DatabaseMetaData metaData = connection.getMetaData();
String name = metaData.getDatabaseProductName().toLowerCase(Locale.ENGLISH);
if (name.contains("hsql")) {
return HsqlDbDialect.INSTANCE;
}
if (name.contains("h2")) {
return H2Dialect.INSTANCE;
}
if (name.contains("mysql")) { // catches also mariadb
return new MySqlDialect(getIdentifierProcessing(metaData));
}
if (name.contains("postgresql")) {
return PostgresDialect.INSTANCE;
}
if (name.contains("microsoft")) {
return SqlServerDialect.INSTANCE;
}
if (name.contains("db2")) {
return Db2Dialect.INSTANCE;
}
return null;
}
我是Java和Spring Boot的新手.有人可以帮我解决这个问题吗?
I'm new to Java and Spring Boot. Can someone help me to solve this issue?
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'jdbcConverter' defined in class path resource [com/example/relationaldataaccess/ApplicationConfig.class]: Unsatisfied dependency expressed through method 'jdbcConverter' parameter 4; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jdbcDialect' defined in class path resource [com/example/relationaldataaccess/ApplicationConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.relational.core.dialect.Dialect]: Factory method 'jdbcDialect' threw exception; nested exception is org.springframework.data.jdbc.repository.config.DialectResolver$NoDialectException: Cannot determine a dialect for org.springframework.jdbc.core.JdbcTemplate@74fef3f7. Please provide a Dialect.
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:798) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:539) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1338) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$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-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at com.example.relationaldataaccess.Relationaldataaccess1Application.main(Relationaldataaccess1Application.java:10) [classes/:na]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jdbcDialect' defined in class path resource [com/example/relationaldataaccess/ApplicationConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.relational.core.dialect.Dialect]: Factory method 'jdbcDialect' threw exception; nested exception is org.springframework.data.jdbc.repository.config.DialectResolver$NoDialectException: Cannot determine a dialect for org.springframework.jdbc.core.JdbcTemplate@74fef3f7. Please provide a Dialect.
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:656) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:636) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1338) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557) ~[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$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:226) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1306) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1226) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:885) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:789) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
... 20 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.relational.core.dialect.Dialect]: Factory method 'jdbcDialect' threw exception; nested exception is org.springframework.data.jdbc.repository.config.DialectResolver$NoDialectException: Cannot determine a dialect for org.springframework.jdbc.core.JdbcTemplate@74fef3f7. Please provide a Dialect.
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:651) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
... 34 common frames omitted
Caused by: org.springframework.data.jdbc.repository.config.DialectResolver$NoDialectException: Cannot determine a dialect for org.springframework.jdbc.core.JdbcTemplate@74fef3f7. Please provide a Dialect.
at org.springframework.data.jdbc.repository.config.DialectResolver.lambda$getDialect$2(DialectResolver.java:76) ~[spring-data-jdbc-2.0.0.RELEASE.jar:2.0.0.RELEASE]
at java.util.Optional.orElseThrow(Unknown Source) ~[na:1.8.0_66]
at org.springframework.data.jdbc.repository.config.DialectResolver.getDialect(DialectResolver.java:75) ~[spring-data-jdbc-2.0.0.RELEASE.jar:2.0.0.RELEASE]
at org.springframework.data.jdbc.repository.config.AbstractJdbcConfiguration.jdbcDialect(AbstractJdbcConfiguration.java:144) ~[spring-data-jdbc-2.0.0.RELEASE.jar:2.0.0.RELEASE]
at com.example.relationaldataaccess.ApplicationConfig$$EnhancerBySpringCGLIB$$6ef57e7e.CGLIB$jdbcDialect$2(<generated>) ~[classes/:na]
at com.example.relationaldataaccess.ApplicationConfig$$EnhancerBySpringCGLIB$$6ef57e7e$$FastClassBySpringCGLIB$$f93edce9.invoke(<generated>) ~[classes/:na]
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) ~[spring-core-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:331) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at com.example.relationaldataaccess.ApplicationConfig$$EnhancerBySpringCGLIB$$6ef57e7e.jdbcDialect(<generated>) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_66]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_66]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_66]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_66]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
... 35 common frames omitted
application.properties
application.properties
spring.datasource.url=jdbc:firebirdsql://localhost:3051/C:\\example.fbd?sql_dialect=3
spring.datasource.driverClassName=org.firebirdsql.jdbc.FBDriver
spring.datasource.username=SYSDBA
spring.datasource.password=password
app.java
package com.example.relationaldataaccess;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class Relationaldataaccess1Application {
public static void main(String[] args) {
SpringApplication.run(Relationaldataaccess1Application.class, args);
}
}
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>relationaldataaccess-1</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>relationaldataaccess-1</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
推荐答案
Spring Data JDBC库本身不包含现成的Firebird方言,因此您需要自己提供一个. 注释Spring JDBC文档的基于基础的配置:
The Spring Data JDBC library itself does not contain a Firebird dialect out of the box, so you need to provide one yourself. How to do this is documented in Annotation-based Configuration of the Spring Data JDBC documentation:
方言由
JdbcOperations
中的JdbcDialectResolver
解析, 通常通过检查Connection
.您可以让Spring自动发现 通过注册实现以下内容的类来创建Dialect
org.springframework.data.jdbc.repository.config.DialectResolver$JdbcDialectProvider
通过META-INF/spring.factories
.DialectResolver
发现 使用Spring的类路径从方言方中实现方言提供者SpringFactoriesLoader
.
Dialects are resolved by
JdbcDialectResolver
fromJdbcOperations
, typically by inspectingConnection
. You can let Spring auto-discover yourDialect
by registering a class that implementsorg.springframework.data.jdbc.repository.config.DialectResolver$JdbcDialectProvider
throughMETA-INF/spring.factories
.DialectResolver
discovers dialect provider implementations from the class path using Spring’sSpringFactoriesLoader
.
要使用Firebird,您需要定义三件事:
To be able to use Firebird, you will need to define three things:
- 方言
- 方言解析器
- Spring的配置文件以查找方言解析器
方言可以是类似的(请注意,该方言假定Firebird 3或更高版本):
The dialect can be something like (note, this dialect assumes Firebird 3 or higher):
package spring.firebird;
import org.springframework.data.relational.core.dialect.AnsiDialect;
import org.springframework.data.relational.core.dialect.ArrayColumns;
import org.springframework.data.relational.core.dialect.LockClause;
import org.springframework.data.relational.core.sql.LockOptions;
public class FirebirdDialect extends AnsiDialect {
public static final FirebirdDialect INSTANCE = new FirebirdDialect();
@Override
public LockClause lock() {
return LOCK_CLAUSE;
}
@Override
public ArrayColumns getArraySupport() {
return ArrayColumns.Unsupported.INSTANCE;
}
private static final LockClause LOCK_CLAUSE = new LockClause() {
@Override
public String getLock(LockOptions lockOptions) {
return "WITH LOCK";
}
@Override
public Position getClausePosition() {
return Position.AFTER_ORDER_BY;
}
};
}
方言解析器,如果连接到Firebird数据库,则返回方言.
A dialect resolver to return the dialect if the connection is to a Firebird database.
package spring.firebird;
import org.springframework.data.jdbc.repository.config.DialectResolver;
import org.springframework.data.relational.core.dialect.Dialect;
import org.springframework.jdbc.core.ConnectionCallback;
import org.springframework.jdbc.core.JdbcOperations;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.SQLException;
import java.util.Locale;
import java.util.Optional;
public class FirebirdDialectResolver implements DialectResolver.JdbcDialectProvider {
@Override
public Optional<Dialect> getDialect(JdbcOperations operations) {
return Optional.ofNullable(
operations.execute((ConnectionCallback<Dialect>) FirebirdDialectResolver::getDialect));
}
private static Dialect getDialect(Connection connection) throws SQLException {
DatabaseMetaData metaData = connection.getMetaData();
String name = metaData.getDatabaseProductName().toLowerCase(Locale.ROOT);
if (name.contains("firebird")) {
return FirebirdDialect.INSTANCE;
}
return null;
}
}
最后,您需要在META-INF
中定义一个名称为spring.factories
的资源,该文件必须包含以下行:
Finally, you need to define a resource in META-INF
with the name spring.factories
, this file must contain the line:
org.springframework.data.jdbc.repository.config.DialectResolver$JdbcDialectProvider=spring.firebird.FirebirdDialectResolver
这允许Spring Data JDBC发现方言解析器并使用它.
This allows Spring Data JDBC to discover the dialect resolver and use it.
这篇关于无法识别Spring Data JDBC Firebird方言的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!