UT 项目启动报错解决方法_required a bean of type 'org.apache.rocketmq.sprin-优快云博客

博客列举了Java开发中的常见报错，如无法解析占位符、找不到所需bean、数据库访问被拒、debug时传输库未找到等，并针对不同报错给出了解决办法，包括修改类、添加MQ和redis配置、添加dubbo配置、修正数据库密码、统一jre与jdk环境等。

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1.报错 Could not resolve placeholder ‘redisAddress’ in value “${redisAddress}”

目前解决办法是在RedissonConfig.java这个类下修改

    @Value("127.0.0.1:6379")
    private String redisAddress;

2.报错verhaulTicketExtendServiceImpl required a bean of type ‘org.apache.rocketmq.spring.core.RocketMQTemplate’ that could not be found.

解决办法是添加MQ配置

```yml
rocketmq:
  name-server: 127.0.0.1:9876
  producer:
    group: test-basicdata-service-group

3.报错nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder ‘redisAddress’ in value “${redisAddress}”

解决办法是添加redis配置

  redis:
    sentinel: # sentinel
      master: mymaster
      nodes: 127.0.0.1:16379,127.0.0.1:16379,127.0.0.1:16379

4.报错A component required a bean of type ‘com.ut.sdnad.services.platenservice.service.ProtectedRoomService’ that could not be found.

这个就是接口没有被注入，需要添加dubbo配置

dubbo:
  scan:
    base-packages: com.ut.wahdkasd.services.expressionservice
  protocol:
    name: dubbo
    port: -1
  registry:
    address: spring-cloud://localhost
  consumer:
    timeout: 60000
    check: false
  application:
    name: ${spring.application.name}

5.报错Caused by: java.sql.SQLException: Access denied for user ‘root’@‘127.0.0.1’ (using password: YES)

数据库的密码配置错误

 environment:
      MYSQL_DATABASE: 'note_service'
      MYSQL_ROOT_PASSWORD: 123456

6. debug时报错ERROR: transport library not found: dt_socket

ERROR: JDWP Transport dt_socket failed to initialize, TRANSPORT_LOAD(509)
JDWP exit error AGENT_ERROR_TRANSPORT_LOAD(196): No transports initialized [debugInit.c:750]
FATAL ERROR in native method: JDWP No transports initialized, jvmtiError=AGENT_ERROR_TRANSPORT_LOAD(196)
解决办法是因为项目启动类的jre环境与jdk环境设置不一致，参考：https://blog.youkuaiyun.com/yiye2017zhangmu/article/details/106546506