java - 如何为此 XML 配置编写 Java 配置？

Question

我正在将 appconfig.xml 转换为 JavaConfigurations(AnnotationConfigs)。我确实将大部分 bean 转换为 JavaConfig。但我被下面列出的几种 bean 困住了。有人可以帮我解决这个问题吗？？

1.Bean 有一个列表元素，它从属性文件中获取值。XML 配置是:

<bean id="propertyCommons"
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath:dbUser.properties</value>
            </list>
        </property>
        <property name="ignoreUnresolvablePlaceholders" value="true" />
    </bean>

我们如何将其转换为 java Config..(特别是从 dbUser.properties 获取值？

2.我们如何将以下工厂配置转换为JavaConfigs？

    .
    .
    .
    <bean id="oozieJobFactoryBean" class="com.mycompany.product.dfe.main.OozieJobFactoryBean" />

    <bean id="cmdArgs" class="com.mycompany.product.dfe.main.CmdArgs"
            scope="prototype" />

    <bean id="oozieJob" factory-bean="oozieJobFactoryBean"
            factory-method="createJob" scope="prototype">
            <constructor-arg ref="cmdArgs" />
    </bean>
    .
    .
    .

3.还有以下配置..

.
.
.
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>

<bean id="entityManagerFactory"
    class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    <property name="persistenceUnitName" value="productPU" />
    <property name="dataSource" ref="dataSource" />
    <property name="jpaVendorAdapter">
        <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
    </property>
    <property name="jpaPropertyMap">
        <map>
            <entry key="hibernate.cache.use_second_level_cache" value="true" />
            <entry key="hibernate.cache.use_query_cache" value="true" />
            <entry key="hibernate.cache.provider_class" value="net.sf.ehcache.hibernate.SingletonEhCacheProvider" />
            <entry key="hibernate.show_sql" value="false" />
            <entry key="hibernate.format_sql" value="false" />
            <entry key="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect" />
            <entry key="javax.persistence.validation.mode" value="NONE" />
            <entry key="hibernate.connection.characterEncoding" value="utf8" />
        </map>
    </property>
</bean>
.
.
.

请帮我解决这个问题，我是 Spring 的新手..:)提前致谢...

努沙德·阿里。

Answer 1

1.PropertyPlaceholderConfigurer

@Configuration
@PropertySource(value = "spring/test5.properties")
class Config {
    @Bean
    PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() {
        PropertySourcesPlaceholderConfigurer c = new PropertySourcesPlaceholderConfigurer();
        c.setIgnoreUnresolvablePlaceholders(true);
        return c;
    }

...

OOzieJobFactory

类配置{

@Bean
@Scope("prototype")
CmdArgs cmdArgs() {
    return new CmdArgs();
}

@Bean
@Scope("prototype")
OozieJobFactory oozieJobFactory() {
    return new OozieJobFactory();
}

@Bean
OozieJob oozieJob(OozieJobFactory factory, CmdArgs cmdArgs) {
    return factory.createJob(cmdArgs);
}

}

实体管理器

类配置{

@Bean
LocalContainerEntityManagerFactoryBean localContainerEntityManagerFactoryBean() {
    LocalContainerEntityManagerFactoryBean b = new LocalContainerEntityManagerFactoryBean();
    b.setPersistenceUnitName("productPU");
    ...
    return b;
}

@Bean
JpaTransactionManager jpaTransactionManager(LocalContainerEntityManagerFactoryBean emf) {
    JpaTransactionManager tm = new JpaTransactionManager();
    tm.setEntityManagerFactory(emf);
    return tm;
}