无法自动连接字段：private org.springframework.mail.javamail.javamailssender[Spring 4.0.0 REALEASE]

我试图在我的应用程序中创建一个HTML邮件发件人，但我遇到了这个错误。以下是我使用名称空间的配置：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context.xsd">

    <context:property-placeholder location="classpath*:/mail_server.properties" />
    <bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSender">
        <property name="host" value="${host}"/>
        <property name="port" value="${port}"/>
        <property name="username" value="${username}"/>
        <property name="password" value="${password}"/>
        <property name="javaMailProperties">
            <props>
                <prop key="mail.transport.protocol">smtp</prop>
                <prop key="mail.smtp.auth">true</prop>
                <prop key="mail.smtp.starttls.enable">true</prop>
                <prop key="mail.debug">true</prop>
            </props>
        </property>
    </bean>
</beans>

当我运行它时，我得到了stackstrace：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mailFeature': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.mail.javamail.JavaMailSender fi.vietjob.feature.mailFeature.mailSender; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.mail.javamail.JavaMailSender] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@javax.inject.Inject()}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:292)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1185)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:700)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
    at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:643)
    at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:606)
    at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:657)
    at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:525)
    at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:466)
    at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
    at javax.servlet.GenericServlet.init(GenericServlet.java:158)
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1241)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1154)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1041)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4969)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5255)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

---

在XML文件中，您以以下方式创建了邮件发件人：

<bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSender">
    <property name="host" value="${host}"/>
    <property name="port" value="${port}"/>
    <property name="username" value="${username}"/>
    <property name="password" value="${password}"/>
    <property name="javaMailProperties">
        <props>
            <prop key="mail.transport.protocol">smtp</prop>
            <prop key="mail.smtp.auth">true</prop>
            <prop key="mail.smtp.starttls.enable">true</prop>
            <prop key="mail.debug">true</prop>
        </props>
    </property>
</bean>

应该行得通

我希望它有用

---

Angelo

你尝试过自动连线注释而不是注入注释吗？我想是同一个兄弟，刚刚尝试过，但仍然不起作用！尝试在bean定义中添加

autowire=“byName”

。并使用

@Autowired

谢谢兄弟，我会尝试让你知道它是否工作。谢谢兄弟，我会在下班回家后尝试让你知道。它工作了，兄弟，我遵循你的指南，还更改了JavaMailSender而不是JavaMailSenderImpl，提前谢谢。但我真的不明白，你能给我解释一下吗。因为我知道，限定符注释只在我们有多个具有相同类型的bean时使用，但在我的应用程序中，我只声明JavaMailSender？！关键是在XML文件中声明了一个id为

mailssender

的bean。当您在没有限定符的情况下使用

@Inject

和/或

@Autowired

时，spring将搜索id与bean名称相等的bean；在您的例子中，它搜索id为

javaMailSender

且没有

mailSender

的bean

<bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSender">
    <property name="host" value="${host}"/>
    <property name="port" value="${port}"/>
    <property name="username" value="${username}"/>
    <property name="password" value="${password}"/>
    <property name="javaMailProperties">
        <props>
            <prop key="mail.transport.protocol">smtp</prop>
            <prop key="mail.smtp.auth">true</prop>
            <prop key="mail.smtp.starttls.enable">true</prop>
            <prop key="mail.debug">true</prop>
        </props>
    </property>
</bean>

@Repository
public class mailFeature {
    @Inject
    @Qualifier("mailSender")
    private JavaMailSender mailSender;
....
}