南京 网站建设模板价格,做网站不给源码程序,网站地址推荐,怎么注册网店首先#xff0c;先构建一个maven项目#xff0c;构建好了之后#xff0c;会有一个错误,先说明一下#xff0c;我生成maven项目时jre给我自动选择的是1.5版本的#xff0c;而本人安装的是1.8的 然后#xff0c;我们要消除这个错误#xff0c;发现是缺少了一个javax.servl…首先先构建一个maven项目构建好了之后会有一个错误,先说明一下我生成maven项目时jre给我自动选择的是1.5版本的而本人安装的是1.8的 然后我们要消除这个错误发现是缺少了一个javax.servlet这个包因此我们在pom文件中加入了 dependencygroupIdjavax.servlet/groupIdartifactIdservlet-api/artifactIdversion3.0-alpha-1/version
/dependency哎发现错误消失了好我们开始构建一个Spring boot 项目添加一些依赖到pom中 首先发现packaging自动生成的是war我们把它改成 packagingjar/packaging然后开始添加Spring boot parentgroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-parent/artifactIdversion1.5.3.RELEASE/version
/parent
dependenciesdependencygroupIdjavax.servlet/groupIdartifactIdservlet-api/artifactIdversion3.0-alpha-1/version/dependencydependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-web/artifactId/dependency
/dependencies
buildpluginsplugingroupIdorg.springframework.boot/groupIdartifactIdspring-boot-maven-plugin/artifactId/plugin/plugins
/build需要说明的是这个时候需要右击项目mavenupdate project 更新一下 这个时候又会有一个错误产生Java compiler level does not match the version of the installed Java project facet. OMG,我去网上查发现他们都是没有错误为什么就我有不公平不过出现错误还是要解决的 这个问题就是你编译的版本和你项目的版本不一致怎么办 好我们来解决一下右击项目properties,选择java compiler 发现是这个样子的 我们要修改成这个选择1.5版本 好这个错误消失了在build path 自己版本的jre就好了然后写一个demo import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;SpringBootApplication
public class Application {public static void main(String[] args) {SpringApplication.run(Application.class, args);}
}ok,发现挺简单的我们试着运行一下OMG,又出问题了 org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org.springframework.boot.context.embedded.EmbeddedServletContainerException: Unable to start embedded Tomcatat org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:137) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:536) ~[spring-context-4.3.8.RELEASE.jar:4.3.8.RELEASE]at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:737) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:370) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]at org.springframework.boot.SpringApplication.run(SpringApplication.java:314) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1162) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1151) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]at com.mts.Application.main(Application.java:9) [classes/:na]
Caused by: org.springframework.boot.context.embedded.EmbeddedServletContainerException: Unable to start embedded Tomcatat org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.initialize(TomcatEmbeddedServletContainer.java:123) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.init(TomcatEmbeddedServletContainer.java:84) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getTomcatEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:554) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:179) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:164) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:134) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]... 8 common frames omitted
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardServer[-1]]at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) ~[tomcat-embed-core-8.5.14.jar:8.5.14]at org.apache.catalina.startup.Tomcat.start(Tomcat.java:344) ~[tomcat-embed-core-8.5.14.jar:8.5.14]at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.initialize(TomcatEmbeddedServletContainer.java:99) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]... 13 common frames omitted
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardService[Tomcat]]at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) ~[tomcat-embed-core-8.5.14.jar:8.5.14]at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:793) ~[tomcat-embed-core-8.5.14.jar:8.5.14]at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ~[tomcat-embed-core-8.5.14.jar:8.5.14]... 15 common frames omitted
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat]]at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) ~[tomcat-embed-core-8.5.14.jar:8.5.14]at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422) ~[tomcat-embed-core-8.5.14.jar:8.5.14]at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ~[tomcat-embed-core-8.5.14.jar:8.5.14]... 17 common frames omitted
Caused by: org.apache.catalina.LifecycleException: A child container failed during startat org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:947) ~[tomcat-embed-core-8.5.14.jar:8.5.14]at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262) ~[tomcat-embed-core-8.5.14.jar:8.5.14]at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ~[tomcat-embed-core-8.5.14.jar:8.5.14]... 19 common frames omitted去网上查了下资料最后发现是前面添加的 dependencygroupIdjavax.servlet/groupIdartifactIdservlet-api/artifactIdversion3.0-alpha-1/version
/dependency和Spring boot 冲突了我们把上面这个 dependencygroupIdjavax.servlet/groupIdartifactIdservlet-api/artifactIdversion3.0-alpha-1/version
/dependency删掉就好了然后再运行一遍发现ok没有问题了 转载于:https://www.cnblogs.com/gudanxiaohai/p/6830905.html
