java - 使用 Spring MVC 发送 html 邮件的 NULL 指针异常

Question

Spring-Mail.xml

<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-2.5.xsd">

<bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
    <property name="host" value="smtp.gmail.com" />


    <property name="javaMailProperties">
       <props>
    </property>
</bean>

<bean id="mailMail" class="com.mkyong.common.EmailProcessor">
    <property name="mailSender" ref="mailSender" />
</bean>

</beans>

EmailProcessor.java

eBeanFactory@7e78d6c6:定义bean [mailSender，mailMail]；工厂层次结构的根 java.lang.NullPointerException

Answer 1

私有(private)JavaMailSender javaMailSender;

您必须在您的情况下调用此属性的 setter private MailSender mailSender;将由spring自动注入(inject)。但 private JavaMailSender javaMailSender; 将为 null。

并且您正在调用 javaMailSender.send(mimeMessage); 导致空指针。

使用(JavaMailSender)mailSender.send(mimeMessage);而不是javaMailSender.send(mimeMessage);