本地启动springboot项目失败端口问题

异常关键字：

Cannot assign requested address: bind

排查结果

配置了环境变量【SERVER_ADDRESS】

网上搜了有的回答是端口占用，是不对的，端口占用的异常是这个【Web server failed to start. Port 8282 was already in use.】

解决办法

第一种：删除相关环节变量
第二种：增加配置server.address=localhost。需要注意的是，如果是使用局域网IP访问需要将localhost改成对应的IP

排查结果非常曲折，提供关键字供参考

• org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory#getWebServer
• org.springframework.boot.context.properties.bind.Binder#bind(org.springframework.boot.context.properties.source.ConfigurationPropertyName, org.springframework.boot.context.properties.bind.Bindable, org.springframework.boot.context.properties.bind.BindHandler, org.springframework.boot.context.properties.bind.Binder.Context, boolean, boolean)
• org.springframework.boot.context.properties.bind.JavaBeanBinder#bind(org.springframework.boot.context.properties.bind.JavaBeanBinder.BeanSupplier, org.springframework.boot.context.properties.bind.DataObjectPropertyBinder, org.springframework.boot.context.properties.bind.JavaBeanBinder.BeanProperty)
• 条件断点 “address”.equals(propertyName)
  
• org.springframework.boot.context.properties.bind.Binder#findProperty
  

到此是找到位置了

我的天，一个早上，终于找到位置了，但是还是不知道哪里的问题，执行如下代码发现，getenv这里有，因为里面有JAVA_HOME，那还我配置的环境变量。果然是他。
这台电脑不是全新的，不知道上个使用者为什么要配置这个，也算是问题找到了，删了这个，完成。

    @Test
    public void testHost() {
        System.getProperties().forEach((k, v) -> System.out.println(k + " ==> " + v));
    }
    @Test
    public void testEnv() {
        System.getenv().forEach((k, v) -> System.out.println(k + " ==> " + v));
    }
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异常堆栈：

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2022-11-29 13:57:59.317 ERROR 1776 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.context.ApplicationContextException: Failed to start bean 'webServerStartStop'; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat server
	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:181) ~[spring-context-5.3.21.jar:5.3.21]
	at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:54) ~[spring-context-5.3.21.jar:5.3.21]
	at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356) ~[spring-context-5.3.21.jar:5.3.21]
	at java.base/java.lang.Iterable.forEach(Iterable.java:75) ~[na:na]
	at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:155) ~[spring-context-5.3.21.jar:5.3.21]
	at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:123) ~[spring-context-5.3.21.jar:5.3.21]
	at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:935) ~[spring-context-5.3.21.jar:5.3.21]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:586) ~[spring-context-5.3.21.jar:5.3.21]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) ~[spring-boot-2.7.3.jar:2.7.3]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:734) ~[spring-boot-2.7.3.jar:2.7.3]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) ~[spring-boot-2.7.3.jar:2.7.3]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:308) ~[spring-boot-2.7.3.jar:2.7.3]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306) ~[spring-boot-2.7.3.jar:2.7.3]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1295) ~[spring-boot-2.7.3.jar:2.7.3]
	at com.org.swg.SwgApplication.main(SwgApplication.java:15) ~[classes/:na]
Caused by: org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat server
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.start(TomcatWebServer.java:229) ~[spring-boot-2.7.3.jar:2.7.3]
	at org.springframework.boot.web.servlet.context.WebServerStartStopLifecycle.start(WebServerStartStopLifecycle.java:43) ~[spring-boot-2.7.3.jar:2.7.3]
	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:178) ~[spring-context-5.3.21.jar:5.3.21]
	... 14 common frames omitted
Caused by: java.lang.IllegalArgumentException: standardService.connector.startFailed
	at org.apache.catalina.core.StandardService.addConnector(StandardService.java:238) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.addPreviouslyRemovedConnectors(TomcatWebServer.java:282) ~[spring-boot-2.7.3.jar:2.7.3]
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.start(TomcatWebServer.java:213) ~[spring-boot-2.7.3.jar:2.7.3]
	... 16 common frames omitted
Caused by: org.apache.catalina.LifecycleException: Protocol handler start failed
	at org.apache.catalina.connector.Connector.startInternal(Connector.java:1077) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
	at org.apache.catalina.core.StandardService.addConnector(StandardService.java:234) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
	... 18 common frames omitted
Caused by: java.net.BindException: Cannot assign requested address: bind
	at java.base/sun.nio.ch.Net.bind0(Native Method) ~[na:na]
	at java.base/sun.nio.ch.Net.bind(Net.java:461) ~[na:na]
	at java.base/sun.nio.ch.Net.bind(Net.java:453) ~[na:na]
	at java.base/sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:227) ~[na:na]
	at org.apache.tomcat.util.net.NioEndpoint.initServerSocket(NioEndpoint.java:275) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
	at org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:230) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
	at org.apache.tomcat.util.net.AbstractEndpoint.bindWithCleanup(AbstractEndpoint.java:1227) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
	at org.apache.tomcat.util.net.AbstractEndpoint.start(AbstractEndpoint.java:1313) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
	at org.apache.coyote.AbstractProtocol.start(AbstractProtocol.java:614) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
	at org.apache.catalina.connector.Connector.startInternal(Connector.java:1074) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
	... 20 common frames omitted


Process finished with exit code 1

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