例如,如果我的类路径上有数据相关的库,Spring Boot将自动配置一个可以自动连接到我自己的bean和类中的DataSource对象,如下所示：
@Configuration
@ImportResource("classpath:xmlconfig.xml")
public class Config {
// This works!!
@Autowired
private DataSource dataSource;
@Bean
public ClassThatRequiresADataSource() {
ClassThatRequiresADataSource foo = new ClassThatRequiresADataSource();
foo.setDataSource(dataSource);
return foo;
}
}
但是,如果我尝试在XML配置文件中执行相同的操作,我将收到一个异常.我已经通过在我的主配置类中添加了一个@ImportResource(“classpath：xmlconfig.xml”)来引导XML配置文件.这是我正在谈论的一个例子…在xmlconfig.xml里面：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<!-- THIS DOES NOT WORK! -->
<bean id="anotherClassThatRequiresADataSource" class="my.package.AnotherClassThatRequiresADataSource">
<property name="dataSource" ref="dataSource"/>
</bean>
</beans>
上述将在运行Spring Boot应用程序时给出异常,尽管dataSource是一个有效的自动配置的Bean名称.我也尝试过使用自动配置的ConnectionFactory(在类路径上使用ActiveMQ)和EntityManagerFactory与Hibernate& JPA在类路径上,没有一个工作.
基本上,我所要问的是什么是相当于将自动连接Spring Boot自动配置的bean转换成XML配置文件？
这是我的主要的Spring Boot入门点只是所有文档中列出的标准类：
@Configuration
@ComponentScan
@EnableAutoConfiguration
public class Application {
public static void main(String[] args) throws Exception {
SpringApplication.run(Application.class,args);
}
}
我主要在Spring Integration应用程序中使用这个应用程序,其中Java配置不太受支持,框架的核心是基于XML配置,但是我想使用Spring Boot自动配置的DataSource和ConnectionFactory bean一些集成元素.
编辑：@AdilF提供的答案适用于dataSource bean,但是类似的配置不适用于connectionFactory bean.请参阅以下演示代码的GitHub项目：
https://github.com/ccampo133/autoconfig-test/tree/master
如果有人能弄清楚如何正确连接connectionFactory bean,我将非常感谢.
以下是大部分代码说明：
Application.java
@Configuration
@ComponentScan
@EnableAutoConfiguration
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class,args);
}
}
Config.java
@Configuration
@ImportResource("classpath:/resources/config.xml")
public class Config { }
FooService.java
@Service
public class FooService {
final private Logger logger = LoggerFactory.getLogger(FooService.class);
@Autowired
private DataSource dataSource;
@Autowired
private ConnectionFactory connectionFactory;
@Autowired
private EntityManagerFactory entityManagerFactory;
@PostConstruct
public void init() {
Assert.notNull(dataSource,"dataSource is null!");
logger.info("dataSource not null");
Assert.notNull(connectionFactory,"connectionFactory is null!");
logger.info("connectionFactory not null");
Assert.notNull(entityManagerFactory,"entityManagerFactory is null!");
logger.info("entityManagerFactory is not null");
}
}
BarService.java
public class BarService {
final private Logger logger = LoggerFactory.getLogger(BarService.class);
private DataSource dataSource;
private ConnectionFactory connectionFactory;
private EntityManagerFactory entityManagerFactory;
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
}
public void setConnectionFactory(ConnectionFactory connectionFactory) {
this.connectionFactory = connectionFactory;
}
public void setEntityManagerFactory(final EntityManagerFactory entityManagerFactory) {
this.entityManagerFactory = entityManagerFactory;
}
@PostConstruct
public void init() {
Assert.notNull(dataSource,"entityManagerFactory is null!");
logger.info("entityManagerFactory is not null");
}
}
config.xml中
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="barService" class="app.service.BarService">
<!-- THIS WORKS! -->
<property name="dataSource" ref="dataSource"/>
<!-- THIS DOESN'T WORK! -->
<property name="connectionFactory" ref="connectionFactory"/>
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>
</beans>
的build.gradle
buildscript {
ext {
junitVersion = "4.11"
springBootVersion = "1.1.5.RELEASE"
springIntegrationVersion = "4.0.3.RELEASE"
activeMqVersion = "5.7.0"
}
repositories {
mavenCentral()
}
dependencies {
classpath "org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}"
}
}
apply plugin: "java"
apply plugin: "eclipse"
apply plugin: "idea"
apply plugin: "spring-boot"
configurations {
providedRuntime
}
jar {
baseName = "autoconfig-test"
version = "0.0.1-SNAPSHOT"
}
repositories {
mavenCentral()
maven { url "http://repo.spring.io/libs-milestone/" }
}
dependencies {
// Spring Boot starters
compile "org.springframework.boot:spring-boot-starter-data-jpa:${springBootVersion}"
compile "org.springframework.boot:spring-boot-starter-integration:${springBootVersion}"
compile "org.springframework.integration:spring-integration-jms:${springIntegrationVersion}"
// ActiveMQ
compile "org.apache.activemq:activemq-core:${activeMqVersion}"
// Persistence
runtime "com.h2database:h2"
// Test
testCompile "junit:junit:${junitVersion}"
}
