spring-boot-plus 常见问题解决 FAQ

编译错误问题

log日志编译错误

编译提示log.info等日志错误

解决

运行错误问题

MySQL错误

  1. 2019-07-31 14:16:52.412 ERROR 14724 --- [           main] com.alibaba.druid.pool.DruidDataSource   : init datasource error, url: jdbc:mysql://localhost:3306/spring_boot_plus?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf8&useSSL=false&allowPublicKeyRetrieval=true
  3. com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
  5. The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

不能连接mysql

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

解决

  • 检查MySQL服务是否启动
  • 检查ip地址和端口号

未知数据库

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown database 'spring_boot_plus'

解决

  • 检查是否新建spring_boot_plus数据库
  • 默认的数据库为spring_boot_plus，可在不同环境的配置文件中更改
  • 例如：application-local.yml中的spring.datasource.url中更改数据库名称

Redis错误

  1. org.springframework.data.redis.connection.PoolException: Could not get a resource from the pool; nested exception is io.lettuce.core.RedisConnectionException: Unable to connect to localhost:6379

不能连接redis

Unable to connect to localhost:6379

解决

  • 启动redis服务
  • redis默认端口号：6379
  • 默认没有设置密码
  • 请根据环境情况，进行配置

端口已被占用

Caused by: java.net.BindException: Address already in use: bind

  1. Caused by: java.net.BindException: Address already in use: bind
  2. 	at sun.nio.ch.Net.bind0(Native Method) ~[na:1.8.0_191]
  3. 	at sun.nio.ch.Net.bind(Net.java:433) ~[na:1.8.0_191]
  4. 	at sun.nio.ch.Net.bind(Net.java:425) ~[na:1.8.0_191]
  5. 	at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223) ~[na:1.8.0_191]
  6. 	at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74) ~[na:1.8.0_191]

详细错误日志

  1. 2019-08-02 23:23:41.350 ERROR 23380 --- [           main] org.apache.catalina.util.LifecycleBase   : Failed to start component [Connector[HTTP/1.1-8888]]
  3. org.apache.catalina.LifecycleException: Protocol handler start failed
  4. 	at org.apache.catalina.connector.Connector.startInternal(Connector.java:1008) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
  5. 	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
  6. 	at org.apache.catalina.core.StandardService.addConnector(StandardService.java:227) [tomcat-embed-core-9.0.21.jar:9.0.21]
  7. 	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.addPreviouslyRemovedConnectors(TomcatWebServer.java:263) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
  8. 	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.start(TomcatWebServer.java:195) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
  9. 	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.startWebServer(ServletWebServerApplicationContext.java:296) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
  10. 	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:162) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
  11. 	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552) [spring-context-5.1.8.RELEASE.jar:5.1.8.RELEASE]
  12. 	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
  13. 	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:742) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
  14. 	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:389) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
  15. 	at org.springframework.boot.SpringApplication.run(SpringApplication.java:311) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
  16. 	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1213) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
  17. 	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1202) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
  18. 	at io.geekidea.springbootplus.SpringBootPlusApplication.main(SpringBootPlusApplication.java:51) [classes/:na]
  19. Caused by: java.net.BindException: Address already in use: bind
  20. 	at sun.nio.ch.Net.bind0(Native Method) ~[na:1.8.0_191]
  21. 	at sun.nio.ch.Net.bind(Net.java:433) ~[na:1.8.0_191]
  22. 	at sun.nio.ch.Net.bind(Net.java:425) ~[na:1.8.0_191]
  23. 	at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223) ~[na:1.8.0_191]
  24. 	at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74) ~[na:1.8.0_191]
  25. 	at org.apache.tomcat.util.net.NioEndpoint.initServerSocket(NioEndpoint.java:230) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
  26. 	at org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:213) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
  27. 	at org.apache.tomcat.util.net.AbstractEndpoint.bindWithCleanup(AbstractEndpoint.java:1124) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
  28. 	at org.apache.tomcat.util.net.AbstractEndpoint.start(AbstractEndpoint.java:1210) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
  29. 	at org.apache.coyote.AbstractProtocol.start(AbstractProtocol.java:585) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
  30. 	at org.apache.catalina.connector.Connector.startInternal(Connector.java:1005) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
  31. 	... 14 common frames omitted
  33. 2019-08-02 23:23:41.356  INFO 23380 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
  34. 2019-08-02 23:23:41.362  WARN 23380 --- [           main] o.a.c.loader.WebappClassLoaderBase       : The web application [ROOT] appears to have started a thread named [lettuce-eventExecutorLoop-1-1] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
  35.  sun.misc.Unsafe.park(Native Method)
  36.  java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
  37.  java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
  38.  java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:467)
  39.  io.netty.util.concurrent.SingleThreadEventExecutor.takeTask(SingleThreadEventExecutor.java:252)
  40.  io.netty.util.concurrent.DefaultEventExecutor.run(DefaultEventExecutor.java:64)
  41.  io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:906)
  42.  io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
  43.  io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
  44.  java.lang.Thread.run(Thread.java:748)
  45. 2019-08-02 23:23:41.363  WARN 23380 --- [           main] o.a.c.loader.WebappClassLoaderBase       : The web application [ROOT] appears to have started a thread named [Druid-ConnectionPool-Create-1916224178] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
  46.  sun.misc.Unsafe.park(Native Method)
  47.  java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
  48.  java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
  49.  com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2672)
  50. 2019-08-02 23:23:41.364  WARN 23380 --- [           main] o.a.c.loader.WebappClassLoaderBase       : The web application [ROOT] appears to have started a thread named [Druid-ConnectionPool-Destroy-1916224178] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
  51.  java.lang.Thread.sleep(Native Method)
  52.  com.alibaba.druid.pool.DruidDataSource$DestroyConnectionThread.run(DruidDataSource.java:2768)
  53. 2019-08-02 23:23:41.377  INFO 23380 --- [           main] ConditionEvaluationReportLoggingListener : 
  55. Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
  56. 2019-08-02 23:23:41.383 ERROR 23380 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 
  58. ***************************
  59. APPLICATION FAILED TO START
  60. ***************************
  62. Description:
  64. The Tomcat connector configured to listen on port 8888 failed to start. The port may already be in use or the connector may be misconfigured.
  66. Action:
  68. Verify the connector's configuration, identify and stop any process that's listening on port 8888, or configure this application to listen on another port.
  70. 2019-08-02 23:23:41.410  INFO 23380 --- [           main] o.s.s.c.ThreadPoolTaskScheduler          : Shutting down ExecutorService 'taskScheduler'
  71. 2019-08-02 23:23:41.413  INFO 23380 --- [           main] o.s.s.c.ThreadPoolTaskScheduler          : Shutting down ExecutorService
  72. 2019-08-02 23:23:41.414  INFO 23380 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Shutting down ExecutorService 'applicationTaskExecutor'
  73. 2019-08-02 23:23:41.417  INFO 23380 --- [           main] com.alibaba.druid.pool.DruidDataSource   : {dataSource-1} closing ...
  74. 2019-08-02 23:23:41.421  INFO 23380 --- [           main] com.alibaba.druid.pool.DruidDataSource   : {dataSource-1} closed
  76. Process finished with exit code 1

解决

修改端口： application.local.yml中的port，默认端口8888

  • 或者kill掉对应端口的进程
  • Mac/linux：kill端口
  • Windows：找到对应的java程序，结束任务

Spring Boot Admin不能访问问题

你的主机中的软件中止了一个已建立的连接

  1. 2019-07-31 16:33:37.205 ERROR 6696 --- [ctor-http-nio-2] o.s.w.s.adapter.HttpWebHandlerAdapter    : [f4aeb71d] Error [java.io.IOException: 你的主机中的软件中止了一个已建立的连接。] for HTTP GET "/applications", but ServerHttpResponse already committed (200 OK)

解决

8888端口：与当前项目端口一致

  • yaml配置
  1. spring:
  2.   boot:
  3.     admin:
  4.       client:
  5.         url: 'http://localhost:8888'
  6. management:
  7.   endpoints:
  8.     web:
  9.       exposure:
  10.         include: "*"
  11.   endpoint:
  12.     health:
  13.       show-details: ALWAYS
  • properties配置
  1. spring.boot.admin.client.url=http://localhost:8888
  2. management.endpoints.web.exposure.include=*
  3. management.endpoint.health.show-details=ALWAYS

Swagger问题

不能访问swagger页面

  1. {"code":404,"data":null,"msg":"你请求的路径不存在","time":"2019-08-01 12:56:27"}

解决

  • 检查WebMvcConfig.java类中是否排除了swagger静态资源
  1. @Override
  2. public void addResourceHandlers(ResourceHandlerRegistry registry) {
  3.     registry.addResourceHandler("swagger-ui.html")
  4.             .addResourceLocations("classpath:/META-INF/resources/");
  5.     registry.addResourceHandler("/webjars/**")
  6.             .addResourceLocations("classpath:/META-INF/resources/webjars/");
  7. }

LocalDateTime日期类使用问题

Caused by: java.sql.SQLFeatureNotSupportedException

  1. Caused by: java.sql.SQLFeatureNotSupportedException
  2. 	at com.alibaba.druid.pool.DruidPooledResultSet.getObject(DruidPooledResultSet.java:1771)
  3. 	at org.apache.ibatis.type.LocalDateTimeTypeHandler.getNullableResult(LocalDateTimeTypeHandler.java:38)
  4. 	at org.apache.ibatis.type.LocalDateTimeTypeHandler.getNullableResult(LocalDateTimeTypeHandler.java:28)
  5. 	at org.apache.ibatis.type.BaseTypeHandler.getResult(BaseTypeHandler.java:81)
  1. org.springframework.dao.InvalidDataAccessApiUsageException: Error attempting to get column 'create_time' from result set.  Cause: java.sql.SQLFeatureNotSupportedException
  2. ; null; nested exception is java.sql.SQLFeatureNotSupportedException
  4. 	at org.springframework.jdbc.support.SQLExceptionSubclassTranslator.doTranslate(SQLExceptionSubclassTranslator.java:96)
  5. 	at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72)
  6. 	at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81)
  7. 	at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:73)
  8. 	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:446)
  9. 	at com.sun.proxy.$Proxy134.selectOne(Unknown Source)
  10. 	at org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:166)
  11. 	at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.execute(MybatisMapperMethod.java:89)
  12. 	at com.baomidou.mybatisplus.core.override.MybatisMapperProxy.invoke(MybatisMapperProxy.java:62)
  13. 	at com.sun.proxy.$Proxy139.getSysLogById(Unknown Source)
  14. 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  15. 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  16. 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  17. 	at java.lang.reflect.Method.invoke(Method.java:498)
  • 问题原因是JDK8的LocalDate、LocalTime、LocalDateTime日期类型，druid数据源尚不支持
  • druid issues

目前解决办法

  1. 更换数据源
  2. 在mybatis-plus生成代码中配置，将日期类型生成为DateType.ONLY_DATE，数据库中的日期类型生成为Date
  1. // 全局配置
  2. GlobalConfig gc = new GlobalConfig();
  3. gc.setDateType(DateType.ONLY_DATE); // 设置日期类型为Date

mybatis-plus dateType配置

运维部署问题

项目打包后，依赖包丢失

  • spring-boot-plus.jar只有100多kb
  • 此时依赖包未打包到主jar中，检查pom.xml配置

spring-boot-plus项目中，pom.xml没有直接继承spring-boot-starter-parent

而是导入spring-boot-dependencies依赖

这样做的好处是，项目可以继承自己的父pom

使用这种方式，进行打包，默认情况下，会导致依赖包丢失，需进行以下配置

  1. <plugin>
  2.     <groupId>org.springframework.boot</groupId>
  3.     <artifactId>spring-boot-maven-plugin</artifactId>
  4.     <configuration>
  5.         <mainClass>io.geekidea.springbootplus.SpringBootPlusApplication</mainClass>
  6.     </configuration>
  7.     <executions>
  8.         <execution>
  9.             <goals>
  10.                 <goal>repackage</goal>
  11.             </goals>
  12.         </execution>
  13.     </executions>
  14. </plugin>
  • mainClass：项目启动类
  • repackage：重新打包

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