【发布时间】：2018-08-30 14:20:48
【问题描述】：
我正在尝试在 Spring-boot 的控制下运行简单的 API 服务器，但遇到了两个问题：
1. 在 Eclipse (Neon.1 Release (4.6.1)) 中，当我尝试启动应用程序时，我收到关于 servlet 容器的错误（在主题末尾查看错误）。
2. 当我运行 gradle build 并尝试运行 jar 时，我看到关于未设置 DataSource bean 的错误。
更新：问题 1 没什么大不了的，因为其他人能够从 IDEA 完美流畅地运行项目（并且它有效）。这很有趣，因为无论如何，由 gradle 构建的 jar 会在主题末尾列出关于丢失数据源的错误，即使您将 DataSource 从 main 移动到 @Configuration 类。这意味着，我在 Eclipse 中遇到问题（我的本地问题）和 gradle build 任务问题。
更新 2：Spring Boot auto configuration for datasource 解决的问题我仍然不知道为什么 dataSource 无法自动装配，但这种方式更好，因为使用的方法来自链接我可以从属性中获取值并使用不同的环境切换它们。谢谢大家的帮助。
我的代码如下： 应用程序.java：
package com.my.package;
import javax.sql.DataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.support.AbstractApplicationContext;
import com.my.package.MvcConfig;
@SpringBootApplication
@EnableAutoConfiguration
@ComponentScan
public class Application {
@Autowired
DataSource dataSource;
@SuppressWarnings({ "unused", "resource" })
public static void main(String[] args) {
AbstractApplicationContext context = new AnnotationConfigApplicationContext(MvcConfig.class);
SpringApplication.run(Application.class, args);
}
}
MvcConfig.java：
package com.my.package;
import org.springframework.context.annotation.*;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
@Configuration
public class MvcConfig extends WebMvcConfigurerAdapter {
@Override
public void addResourceHandlers(final ResourceHandlerRegistry registry) {
registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
}
}
Application.properties：
# ===============================
# = DATA SOURCE
# ===============================
spring.datasource.url = jdbc:mysql://localhost:3306/benchmark
spring.datasource.username = root
spring.datasource.password =root
spring.datasource.testWhileIdle = true
spring.datasource.validationQuery = SELECT 1
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
# ===============================
# = JPA / HIBERNATE
# ===============================
spring.jpa.show-sql = false
spring.jpa.hibernate.ddl-auto = update
spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect
Build.gradle：
plugins {
id "org.springframework.boot" version "1.5.6.RELEASE"
}
dependencies {
compile group: 'org.springframework.boot', name: 'spring-boot-starter-data-jpa', version:'1.5.6.RELEASE'
compile(group: 'org.springframework.boot', name: 'spring-boot-starter-websocket', version:'1.5.6.RELEASE') {
exclude(module: 'spring-boot-starter-tomcat')
}
compile group: 'org.springframework.boot', name: 'spring-boot-starter-jetty', version:'1.5.6.RELEASE'
compile group: 'org.springframework.boot', name: 'spring-boot-starter-jdbc', version:'1.5.6.RELEASE'
compile group: 'org.springframework.boot', name: 'spring-boot-starter-actuator', version: '1.5.6.RELEASE'
compile group: 'mysql', name: 'mysql-connector-java', version:'5.1.6'
compile group: 'com.google.code.gson', name: 'gson', version:'2.8.1'
compile(group: 'org.springframework', name: 'spring-core', version:'4.3.11.RELEASE') {
exclude(module: 'commons-logging')
}
compile group: 'org.springframework', name: 'spring-jdbc', version:'4.3.8.RELEASE'
compile group: 'javax.interceptor', name: 'javax.interceptor-api', version:'1.+'
testCompile group: 'junit', name: 'junit', version:'4.11'
}
这里有错误。当我尝试在 Eclipse 中启动时：
12:40:08.155:WARN [main]: o.s.b.c.e.AnnotationConfigEmbeddedWebApplicationContext -
Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is java.lang.NoSuchMethodError: javax.servlet.ServletContext.addServlet(Ljava/lang/String;Ljavax/servlet/Servlet;)Ljavax/servlet/ServletRegistration$Dynamic;
12:40:08.164:INFO [main]: o.s.b.a.l.AutoConfigurationReportLoggingInitializer -
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
12:40:08.169:ERROR[main]: o.s.boot.SpringApplication -
Application startup failed
org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is java.lang.NoSuchMethodError: javax.servlet.ServletContext.addServlet(Ljava/lang/String;Ljavax/servlet/Servlet;)Ljavax/servlet/ServletRegistration$Dynamic;
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:137)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:537)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:303)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107)
at com.my.package.Application.main(Application.java:26)
Caused by: java.lang.NoSuchMethodError: javax.servlet.ServletContext.addServlet(Ljava/lang/String;Ljavax/servlet/Servlet;)Ljavax/servlet/ServletRegistration$Dynamic;
at org.springframework.boot.web.servlet.ServletRegistrationBean.onStartup(ServletRegistrationBean.java:191)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.selfInitialize(EmbeddedWebApplicationContext.java:229)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.access$000(EmbeddedWebApplicationContext.java:89)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext$1.onStartup(EmbeddedWebApplicationContext.java:213)
at org.springframework.boot.context.embedded.jetty.ServletContextInitializerConfiguration$Initializer.callInitializers(ServletContextInitializerConfiguration.java:83)
at org.springframework.boot.context.embedded.jetty.ServletContextInitializerConfiguration$Initializer.doStart(ServletContextInitializerConfiguration.java:72)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:131)
at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:105)
at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:113)
at org.eclipse.jetty.server.handler.ScopedHandler.doStart(ScopedHandler.java:120)
at org.eclipse.jetty.server.handler.ContextHandler.startContext(ContextHandler.java:844)
at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:344)
at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1501)
at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1463)
at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:785)
at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:261)
at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:545)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:131)
at org.eclipse.jetty.server.Server.start(Server.java:452)
at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:105)
at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:113)
at org.eclipse.jetty.server.Server.doStart(Server.java:419)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.springframework.boot.context.embedded.jetty.JettyEmbeddedServletContainer.initialize(JettyEmbeddedServletContainer.java:104)
at org.springframework.boot.context.embedded.jetty.JettyEmbeddedServletContainer.<init>(JettyEmbeddedServletContainer.java:82)
at org.springframework.boot.context.embedded.jetty.JettyEmbeddedServletContainerFactory.getJettyEmbeddedServletContainer(JettyEmbeddedServletContainerFactory.java:561)
at org.springframework.boot.context.embedded.jetty.JettyEmbeddedServletContainerFactory.getEmbeddedServletContainer(JettyEmbeddedServletContainerFactory.java:190)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:164)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:134)
... 8 common frames omitted
当我运行 jar 时：
12:43:24.707:DEBUG[main]: o.s.b.d.LoggingFailureAnalysisReporter -
Application failed to start due to an exception
org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'javax.sql.DataSource' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1493)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1104)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066)
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:835)
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741)
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:189)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1193)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1095)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:372)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1173)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1067)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1078)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:857)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:303)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107)
at com.my.package.Application.main(Application.java:26)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:87)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:50)
at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:51)
12:43:24.707:ERROR[main]: o.s.b.d.LoggingFailureAnalysisReporter -
***************************
APPLICATION FAILED TO START
***************************
Description:
Parameter 0 of constructor in org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration required a bean of type 'javax.sql.DataSource' that could not be found.
- Bean method 'dataSource' not loaded because @ConditionalOnProperty (spring.datasource.jndi-name) did not find property 'jndi-name'
- Bean method 'dataSource' not loaded because @ConditionalOnBean (types: org.springframework.boot.jta.XADataSourceWrapper; SearchStrategy: all) did not find any beans
我尝试在 application.java 中使用注解来处理依赖项，但无法运行它。我在本地考虑这个问题，但我不确定去哪里找（不久前我正在将 Gradle 重新安装到 3.5 版本）。
【问题讨论】：
-
可以通过设置“tomcat.version”属性来改变Tomcat的版本：ext['tomcat.version'] = '7.0.63' //Tomcat的版本，并添加依赖{ compile ' org.springframework.boot:spring-boot-starter-web' }
-
不适合我，我正在使用码头，当我切换到 tomcat 时，tomcat 遇到了同样的错误
标签： java spring eclipse spring-boot