Question

org.springframework.beans.factory.BeanCreationException：错误创建名为＆＃39; dbDataSource＆＃39;的bean定义于 cz.ita.javaee.config.DatabaseConfiguration：意外的异常在创造豆子期间;嵌套异常是 java.lang.IllegalArgumentException：无法解析占位符＆＃39; db.jndi＆＃39;在价值＆＃34; $ {db.jndi}＆＃34;在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:518）在 org.springframework.beans.factory.support.AbstractBeanFactory.lambda $ doGetBean $ 0（AbstractBeanFactory.java:312）在 org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:228）在 org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:310）在 org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:200）在 org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons（DefaultListableBeanFactory.java:756）在 org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization（AbstractApplicationContext.java:868）在 org.springframework.context.support.AbstractApplicationContext.refresh（AbstractApplicationContext.java:549）在 org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext（ContextLoader.java:409）在 org.springframework.web.context.ContextLoader.initWebApplicationContext（ContextLoader.java:291）在 org.springframework.web.context.ContextLoaderListener.contextInitialized（ContextLoaderListener.java:103）在 org.apache.catalina.core.StandardContext.listenerStart（StandardContext.java:4743）在 org.apache.catalina.core.StandardContext.startInternal（StandardContext.java:5207）在 org.apache.catalina.util.LifecycleBase.start（LifecycleBase.java:150）在 org.apache.catalina.core.ContainerBase.addChildInternal（ContainerBase.java:752）在 org.apache.catalina.core.ContainerBase.addChild（ContainerBase.java:728）在 org.apache.catalina.core.StandardHost.addChild（StandardHost.java:734）在 org.apache.catalina.startup.HostConfig.manageApp（HostConfig.java:1739） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:498）at org.apache.tomcat.util.modeler.BaseModelMBean.invoke（BaseModelMBean.java:300）在 com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke（DefaultMBeanServerInterceptor.java:819）在 com.sun.jmx.mbeanserver.JmxMBeanServer.invoke（JmxMBeanServer.java:801）在 org.apache.catalina.mbeans.MBeanFactory.createStandardContext（MBeanFactory.java:482）在 org.apache.catalina.mbeans.MBeanFactory.createStandardContext（MBeanFactory.java:431） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:498）at org.apache.tomcat.util.modeler.BaseModelMBean.invoke（BaseModelMBean.java:300）在 com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke（DefaultMBeanServerInterceptor.java:819）在 com.sun.jmx.mbeanserver.JmxMBeanServer.invoke（JmxMBeanServer.java:801）在 javax.management.remote.rmi.RMIConnectionImpl.doOperation（RMIConnectionImpl.java:1468）在 javax.management.remote.rmi.RMIConnectionImpl.access $ 300（RMIConnectionImpl.java:76）在 javax.management.remote.rmi.RMIConnectionImpl $ PrivilegedOperation.run（RMIConnectionImpl.java:1309）在 javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation（RMIConnectionImpl.java:1401）在 javax.management.remote.rmi.RMIConnectionImpl.invoke（RMIConnectionImpl.java:829） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:498）at sun.rmi.server.UnicastServerRef.dispatch（UnicastServerRef.java:357）在sun.rmi.transport.Transport $ 1.run（Transport.java:200）at sun.rmi.transport.Transport $ 1.run（Transport.java:197）at java.security.AccessController.doPrivileged（Native Method）at sun.rmi.transport.Transport.serviceCall（Transport.java:196）at sun.rmi.transport.tcp.TCPTransport.handleMessages（TCPTransport.java:568）在 sun.rmi.transport.tcp.TCPTransport $ ConnectionHandler.run0（TCPTransport.java:826）在 sun.rmi.transport.tcp.TCPTransport $ ConnectionHandler.lambda $运行$ 0（TCPTransport.java:683）在java.security.AccessController.doPrivileged（Native Method）at sun.rmi.transport.tcp.TCPTransport $ ConnectionHandler.run（TCPTransport.java:682）在 java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1149）在 java.util.concurrent.ThreadPoolExecutor中的$ Worker.run（ThreadPoolExecutor.java:624）在java.lang.Thread.run（Thread.java:748）引起： java.lang.IllegalArgumentException：无法解析占位符＆＃39; db.jndi＆＃39;在价值＆＃34; $ {db.jndi}＆＃34;在 org.springframework.util.PropertyPlaceholderHelper.parseStringValue（PropertyPlaceholderHelper.java:172）在 org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders（PropertyPlaceholderHelper.java:124）在 org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders（AbstractPropertyResolver.java:237）在 org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders（AbstractPropertyResolver.java:211）在 org.springframework.context.support.PropertySourcesPlaceholderConfigurer.lambda $ processProperties $ 0（PropertySourcesPlaceholderConfigurer.java:175）在 org.springframework.beans.factory.support.AbstractBeanFactory.resolveEmbeddedValue（AbstractBeanFactory.java:834）在 org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency（DefaultListableBeanFactory.java:1081）在 org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency（DefaultListableBeanFactory.java:1060）在 org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument（ConstructorResolver.java:809）在 org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray（ConstructorResolver.java:715）在 org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod（ConstructorResolver.java:458）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod（AbstractAutowireCapableBeanFactory.java:1249）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance（AbstractAutowireCapableBeanFactory.java:1098）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:545）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:502） ......还有55个

我的数据库配置类：

@EnableTransactionManagement
public class DatabaseConfiguration {

    @Bean(name = "dbDataSource")
    @Profile("!development")
    public DataSource dataSource(@Value("${db.jndi}") String dbJndiName) {
        JndiDataSourceLookup lookup = new JndiDataSourceLookup();
        return lookup.getDataSource(dbJndiName);
    }

    @Profile("development")
    public DataSource dataSource(@Value("${development.db.driver}") String dbDriver,
            @Value("${development.db.url}") String dbUrl,
            @Value("${development.db.username}") String dbUsername,
            @Value("${development.db.password}") String dbPassword) {
        DriverManagerDataSource driverManagerDataSource = new DriverManagerDataSource(dbUrl);
        driverManagerDataSource.setDriverClassName(dbDriver);
        driverManagerDataSource.setUsername(dbUsername);
        driverManagerDataSource.setPassword(dbPassword);
        return driverManagerDataSource;
    }

}

和AppConfig：

@Import({DatabaseConfiguration.class, MailSenderConfiguration.class})
public class AppConfig {
@Bean
public PropertyPlaceholderConfigurer propertyPlaceholderConfigurer() {
    PropertyPlaceholderConfigurer propertyPlaceholderConfigurer = new PropertyPlaceholderConfigurer();
    propertyPlaceholderConfigurer.setLocation(new ClassPathResource("application.properties"));
    propertyPlaceholderConfigurer.setIgnoreUnresolvablePlaceholders(true);
    return propertyPlaceholderConfigurer;
}

}

嗨，我上面有错误而且我不知道如何修复它，你能帮助我吗？我的项目工作正常，直到我添加了这个bean：

@PropertySource("classpath:mail.properties")
public class MailSenderConfiguration {

@Value("${mail.smtp.host}")
private String mailHost;

@Value("${mail.smtp.port}")
private int mailPort;

@Value("${mail.username}")
private String mailUsername;

@Value("${mail.password}")
private String mailPassword;

@Value("${mail.protocol}")
private String mailProtocol;

@Value("${mail.smtp.auth}")
private boolean mailAuth;

@Value("${mail.smtp.starttls.enable}")
private String mailEnableTls;

@Value("${mail.smtp.debug}")
private boolean mailDebug;

@Bean
public JavaMailSender getMailSender() {
    JavaMailSenderImpl mailSender = new JavaMailSenderImpl();

    mailSender.setHost(mailHost);
    mailSender.setPort(mailPort);
    mailSender.setUsername(mailUsername);
    mailSender.setPassword(mailPassword);

    Properties mailProperties = new Properties();
    mailProperties.put("mail.transport.protocol", mailProtocol);
    mailProperties.put("mail.smtp.auth", mailAuth);
    mailProperties.put("mail.smtp.starttls.enable", mailEnableTls);
    mailProperties.put("mail.smtp.debug", mailDebug);
    mailSender.setJavaMailProperties(mailProperties);

    return mailSender;
}

@Bean
public PropertyPlaceholderConfigurer propertyPlaceholderConfigurer() {
    PropertyPlaceholderConfigurer propertyPlaceholderConfigurer = new PropertyPlaceholderConfigurer();
    propertyPlaceholderConfigurer.setLocation(new ClassPathResource("mail.properties"));
    propertyPlaceholderConfigurer.setIgnoreUnresolvablePlaceholders(true);
    return propertyPlaceholderConfigurer;
}

}

Answer 1

看起来MailSenderConfiguration中的属性源配置会覆盖AppConfig中的属性源配置。

您可以从MailSenderConfiguration中删除PropertyPlaceholderConfigurer bean，并在AppConfig中为＆＃34; mail.properties＆＃34;设置其他位置。（使用setLocations（）方法而不是setLocation（））：

@Import({DatabaseConfiguration.class, MailSenderConfiguration.class})
public class AppConfig {
@Bean
public PropertyPlaceholderConfigurer propertyPlaceholderConfigurer() {
    PropertyPlaceholderConfigurer propertyPlaceholderConfigurer = new PropertyPlaceholderConfigurer();
    propertyPlaceholderConfigurer.setLocations(new ClassPathResource("application.properties"), new ClassPathResource("mail.properties"));
    propertyPlaceholderConfigurer.setIgnoreUnresolvablePlaceholders(true);
    return propertyPlaceholderConfigurer;
}

Answer 2

在尝试通过使bean静态来评估属性之前，应确保加载PropertyPlaceholderConfigurer bean。 Spring在其他bean定义之前实例化静态bean。

@Import({DatabaseConfiguration.class, MailSenderConfiguration.class})
public class AppConfig {
@Bean
public static PropertyPlaceholderConfigurer propertyPlaceholderConfigurer() {
    PropertyPlaceholderConfigurer propertyPlaceholderConfigurer = new PropertyPlaceholderConfigurer();
    propertyPlaceholderConfigurer.setLocation(new ClassPathResource("application.properties"));
    propertyPlaceholderConfigurer.setIgnoreUnresolvablePlaceholders(true);
    return propertyPlaceholderConfigurer;
}

无法解析某些属性的占位符

2 个答案: