Question

我是Spring的新手，试图创建一个MQTT客户端服务。我有简单的自动处理项目，并希望按照https://docs.spring.io/spring-integration/reference/html/mqtt.html中的建议尝试Paho客户端的xml配置。

DemoApplication.java：

@Configuration  
@ImportResource( { "mqtt.xml" } )  
@SpringBootApplication
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }
}

mqtt.xml：

<?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="clientFactory" class="org.springframework.integration.mqtt.core.DefaultMqttPahoClientFactory">
    <property name="userName" value="${mqtt.username}"/>
    <property name="password" value="${mqtt.password}"/>
</bean>

<int-mqtt:message-driven-channel-adapter id="mqttInbound"
    client-id=""
    url="${mqtt.url}"
    topics="sometopic"
    client-factory="clientFactory"
    channel="output"/>
</beans>

我有一个自动生成的（gradlew build）.classpath文件。但是，无论我在哪里尝试存储mqtt.xml文件，在测试时输入gradle build总是失败，声称：

IOException从ServletContext资源[/mqtt.xml]解析XML文档;嵌套异常是java.io.FileNotFoundException：无法打开ServletContext资源[/mqtt.xml]

...

java.io.FileNotFoundException：无法打开ServletContext资源[/mqtt.xml]

的.classpath：

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
    <classpathentry kind="src" output="bin/main" path="src/main/java">
        <attributes>
            <attribute name="gradle_scope" value="main"/>
            <attribute name="gradle_used_by_scope" value="main,test"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="src" output="bin/main" path="src/main/resources">
        <attributes>
            <attribute name="gradle_scope" value="main"/>
            <attribute name="gradle_used_by_scope" value="main,test"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="src" output="bin/test" path="src/test/java">
        <attributes>
            <attribute name="gradle_scope" value="test"/>
            <attribute name="gradle_used_by_scope" value="test"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8/"/>
    <classpathentry kind="con" path="org.eclipse.buildship.core.gradleclasspathcontainer"/>
    <classpathentry kind="output" path="bin/default"/>
</classpath>

Answer 1

您必须在Java类路径中保存mqtt.xml文件，即src / main / resources以解决上述问题。

Spring Framework基础：找不到.xml？

1 个答案: