引入RocketMQ后，启动不了
来源：9-15 Spring Cloud Stream-编写生产者
mikemhm
2020-09-09
一开始用的版本是视频一开始的，如下
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<!--Greenwich.SR2 第二个bug修复版本-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Greenwich.SR2</version>
<type>pom</type>
<scope>import</scope>
</dependency>
看评论说，版本问题，后来我参考老师git上改了，如下
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.5.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.mhmzq</groupId>
<artifactId>springstream</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>springstream</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-stream-rocketmq</artifactId>
</dependency>
<dependency>
<groupId>org.apache.rocketmq</groupId>
<artifactId>rocketmq-spring-boot-starter</artifactId>
<version>2.0.3</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.8</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<!--<dependency>-->
<!--<groupId>org.springframework.cloud</groupId>-->
<!--<artifactId>spring-cloud-stream</artifactId>-->
<!--<version>2.1.3.RELEASE</version>-->
<!--</dependency>-->
</dependencies>
<dependencyManagement>
<dependencies>
<!--Greenwich.SR2 第二个bug修复版本-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Greenwich.SR1</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<!--整合alilbaba-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>0.9.0.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
但是还是启动报错，这个错误信息如下，
2020-09-09 09:50:01.802 WARN 15272 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'testContorller': Unsatisfied dependency expressed through field 'source'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.springframework.cloud.stream.messaging.Source' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
2020-09-09 09:50:01.807 INFO 15272 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2020-09-09 09:50:01.815 INFO 15272 --- [ main] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-09-09 09:50:01.912 ERROR 15272 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Field source in com.mhmzq.springstream.controller.TestContorller required a bean of type 'org.springframework.cloud.stream.messaging.Source' that could not be found.
The injection point has the following annotations:
- @org.springframework.beans.factory.annotation.Autowired(required=true)
Action:
Consider defining a bean of type 'org.springframework.cloud.stream.messaging.Source' in your configuration.
Process finished with exit code 1
麻烦老师看一下，什么问题？
3回答
-
您好，从您贴出的代码来看，版本是兼容的，代码目测也没有明显问题。
能否将代码提供到GitHub或者Gitee，我来调试下？
012020-09-09 -
mikemhm
提问者
2020-09-09
解决了，启动类导包导错了。。。
012020-09-09 -
mikemhm
提问者
2020-09-09
启动类代码如下
```
package com.mhmzq.springstream;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.stream.annotation.EnableBinding;
import javax.xml.transform.Source;
@SpringBootApplication
@EnableBinding(Source.class)
public class SpringstreamApplication {
public static void main(String[] args) {
SpringApplication.run(SpringstreamApplication.class, args);
System.out.println("启动成功");
}
}```
testController代码如下
```
package com.mhmzq.springstream.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.stream.messaging.Source;
import org.springframework.messaging.support.MessageBuilder;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class TestContorller {
@Autowired
private Source source;
@GetMapping("/getName")
public String getName(){
this.source.output()
.send(MessageBuilder.withPayload("我是消息").build());
return "success";
}
}```
00
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