Spring Boot war部署tomcat org.springframework.beans.factory.BeanCreationException

时间:2017-06-20 06:24:40

标签: spring-boot

尝试在tomcat中部署spring boot war并获得以下错误

2017-06-20 11:28:30.263  WARN 8918 --- [ost-startStop-1] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.boot.archive.spi.ArchiveException: Could not build ClassFile
2017-06-20 11:28:30.283  INFO 8918 --- [ost-startStop-1] utoConfigurationReportLoggingInitializer : 
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2017-06-20 11:28:30.291 ERROR 8918 --- [ost-startStop-1] o.s.boot.SpringApplication               : Application startup failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.boot.archive.spi.ArchiveException: Could not build ClassFile
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1628) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1078) ~[spring-context-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:857) ~[spring-context-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543) ~[spring-context-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.4.RELEASE.jar:1.5.4.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) ~[spring-boot-1.5.4.RELEASE.jar:1.5.4.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) ~[spring-boot-1.5.4.RELEASE.jar:1.5.4.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) ~[spring-boot-1.5.4.RELEASE.jar:1.5.4.RELEASE]
    at org.springframework.boot.web.support.SpringBootServletInitializer.run(SpringBootServletInitializer.java:151) [spring-boot-1.5.4.RELEASE.jar:1.5.4.RELEASE]
    at org.springframework.boot.web.support.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:131) [spring-boot-1.5.4.RELEASE.jar:1.5.4.RELEASE]
    at org.springframework.boot.web.support.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:86) [spring-boot-1.5.4.RELEASE.jar:1.5.4.RELEASE]
    at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:169) [spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5196) [catalina.jar:8.5.15]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [catalina.jar:8.5.15]
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:752) [catalina.jar:8.5.15]
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:728) [catalina.jar:8.5.15]
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734) [catalina.jar:8.5.15]
    at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:952) [catalina.jar:8.5.15]
    at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1823) [catalina.jar:8.5.15]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_131]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_131]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_131]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_131]
    at java.lang.Thread.run(Thread.java:748) [na:1.8.0_131]
Caused by: org.hibernate.boot.archive.spi.ArchiveException: Could not build ClassFile
    at org.hibernate.boot.archive.scan.spi.ClassFileArchiveEntryHandler.toClassFile(ClassFileArchiveEntryHandler.java:64) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.boot.archive.scan.spi.ClassFileArchiveEntryHandler.handleEntry(ClassFileArchiveEntryHandler.java:47) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.boot.archive.internal.ExplodedArchiveDescriptor.processDirectory(ExplodedArchiveDescriptor.java:143) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.boot.archive.internal.ExplodedArchiveDescriptor.processDirectory(ExplodedArchiveDescriptor.java:118) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.boot.archive.internal.ExplodedArchiveDescriptor.processDirectory(ExplodedArchiveDescriptor.java:118) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.boot.archive.internal.ExplodedArchiveDescriptor.processDirectory(ExplodedArchiveDescriptor.java:118) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.boot.archive.internal.ExplodedArchiveDescriptor.processDirectory(ExplodedArchiveDescriptor.java:118) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.boot.archive.internal.ExplodedArchiveDescriptor.visitArchive(ExplodedArchiveDescriptor.java:54) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.boot.archive.scan.spi.AbstractScannerImpl.scan(AbstractScannerImpl.java:47) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.boot.model.process.internal.ScanningCoordinator.coordinateScan(ScanningCoordinator.java:75) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.prepare(MetadataBuildingProcess.java:98) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.<init>(EntityManagerFactoryBuilderImpl.java:199) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.<init>(EntityManagerFactoryBuilderImpl.java:149) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final]
    at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:54) ~[spring-orm-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:353) ~[spring-orm-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:370) ~[spring-orm-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:359) ~[spring-orm-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1687) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1624) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    ... 29 common frames omitted

这是我的pom.xml文件内容:

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <start-class>com.cherry.SpringBootJpaApplication</start-class>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>


        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>

        </dependency>

        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
             <version>9.4-1206-jdbc42</version>
        </dependency> 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>  
        <groupId>org.springframework.boot</groupId>  
        <artifactId>spring-boot-starter-thymeleaf</artifactId>  
        <exclusions>
        <exclusion>
            <artifactId>javassist</artifactId>
            <groupId>org.javassist</groupId>
        </exclusion>
    </exclusions>
    </dependency>  
            <dependency>
            <groupId>org.quartz-scheduler</groupId>
            <artifactId>quartz</artifactId>
            <version>2.1.5</version>
        </dependency>

        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>resteasy-jaxrs</artifactId>
            <version>2.2.1.GA</version>
        </dependency>

        <!-- <dependency> <groupId>org.jboss.resteasy</groupId> <artifactId>resteasy-jaxb-provider</artifactId> 
            <version>2.2.0.GA</version> </dependency> -->

        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>resteasy-jackson-provider</artifactId>
            <version>2.2.1.GA</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

<repositories>  
        <repository>  
            <id>spring-snapshots</id>  
            <name>Spring Snapshots</name>  
            <url>https://repo.spring.io/snapshot</url>  
            <snapshots>  
                <enabled>true</enabled>  
            </snapshots>  
        </repository>  
        <repository>  
            <id>spring-milestones</id>  
            <name>Spring Milestones</name>  
            <url>https://repo.spring.io/milestone</url>  
            <snapshots>  
                <enabled>false</enabled>  
            </snapshots>  
        </repository>  
    </repositories>  
    <pluginRepositories>  
        <pluginRepository>  
            <id>spring-snapshots</id>  
            <name>Spring Snapshots</name>  
            <url>https://repo.spring.io/snapshot</url>  
            <snapshots>  
                <enabled>true</enabled>  
            </snapshots>  
        </pluginRepository>  
        <pluginRepository>  
            <id>spring-milestones</id>  
            <name>Spring Milestones</name>  
            <url>https://repo.spring.io/milestone</url>  
            <snapshots>  
                <enabled>false</enabled>  
            </snapshots>  
        </pluginRepository>  
    </pluginRepositories>  
    <packaging>war</packaging>

application.properties

spring.datasource.url= jdbc:postgresql://localhost:5432/Scheduler
spring.datasource.username=postgres
spring.datasource.password=postgres
logging.level.org.springframework.web: DEBUG
logging.level.org.hibernate: DEBUG

请找到下面的依赖树

[INFO] +- org.springframework.boot:spring-boot-starter-data-jpa:jar:1.5.4.RELEASE:compile
[INFO] |  +- org.springframework.boot:spring-boot-starter:jar:1.5.4.RELEASE:compile
[INFO] |  |  +- org.springframework.boot:spring-boot:jar:1.5.4.RELEASE:compile
[INFO] |  |  +- org.springframework.boot:spring-boot-autoconfigure:jar:1.5.4.RELEASE:compile
[INFO] |  |  +- org.springframework.boot:spring-boot-starter-logging:jar:1.5.4.RELEASE:compile
[INFO] |  |  |  +- ch.qos.logback:logback-classic:jar:1.1.11:compile
[INFO] |  |  |  |  \- ch.qos.logback:logback-core:jar:1.1.11:compile
[INFO] |  |  |  +- org.slf4j:jul-to-slf4j:jar:1.7.25:compile
[INFO] |  |  |  \- org.slf4j:log4j-over-slf4j:jar:1.7.25:compile
[INFO] |  |  \- org.yaml:snakeyaml:jar:1.17:runtime
[INFO] |  +- org.springframework.boot:spring-boot-starter-aop:jar:1.5.4.RELEASE:compile
[INFO] |  |  +- org.springframework:spring-aop:jar:4.3.9.RELEASE:compile
[INFO] |  |  \- org.aspectj:aspectjweaver:jar:1.8.10:compile
[INFO] |  +- org.springframework.boot:spring-boot-starter-jdbc:jar:1.5.4.RELEASE:compile
[INFO] |  |  +- org.apache.tomcat:tomcat-jdbc:jar:8.5.15:compile
[INFO] |  |  |  \- org.apache.tomcat:tomcat-juli:jar:8.5.15:compile
[INFO] |  |  \- org.springframework:spring-jdbc:jar:4.3.9.RELEASE:compile
[INFO] |  +- org.hibernate:hibernate-core:jar:5.0.12.Final:compile
[INFO] |  |  +- org.jboss.logging:jboss-logging:jar:3.3.1.Final:compile
[INFO] |  |  +- org.hibernate.javax.persistence:hibernate-jpa-2.1-api:jar:1.0.0.Final:compile
[INFO] |  |  +- org.javassist:javassist:jar:3.21.0-GA:compile
[INFO] |  |  +- antlr:antlr:jar:2.7.7:compile
[INFO] |  |  +- org.jboss:jandex:jar:2.0.0.Final:compile
[INFO] |  |  +- dom4j:dom4j:jar:1.6.1:compile
[INFO] |  |  \- org.hibernate.common:hibernate-commons-annotations:jar:5.0.1.Final:compile
[INFO] |  +- org.hibernate:hibernate-entitymanager:jar:5.0.12.Final:compile
[INFO] |  +- javax.transaction:javax.transaction-api:jar:1.2:compile
[INFO] |  +- org.springframework.data:spring-data-jpa:jar:1.11.4.RELEASE:compile
[INFO] |  |  +- org.springframework.data:spring-data-commons:jar:1.13.4.RELEASE:compile
[INFO] |  |  +- org.springframework:spring-orm:jar:4.3.9.RELEASE:compile
[INFO] |  |  +- org.springframework:spring-context:jar:4.3.9.RELEASE:compile
[INFO] |  |  +- org.springframework:spring-tx:jar:4.3.9.RELEASE:compile
[INFO] |  |  +- org.springframework:spring-beans:jar:4.3.9.RELEASE:compile
[INFO] |  |  \- org.slf4j:jcl-over-slf4j:jar:1.7.25:compile
[INFO] |  \- org.springframework:spring-aspects:jar:4.3.9.RELEASE:compile
[INFO] +- org.springframework.boot:spring-boot-starter-tomcat:jar:1.5.4.RELEASE:provided
[INFO] |  +- org.apache.tomcat.embed:tomcat-embed-core:jar:8.5.15:provided
[INFO] |  +- org.apache.tomcat.embed:tomcat-embed-el:jar:8.5.15:provided
[INFO] |  \- org.apache.tomcat.embed:tomcat-embed-websocket:jar:8.5.15:provided
[INFO] +- org.springframework.boot:spring-boot-starter-web:jar:1.5.4.RELEASE:compile
[INFO] |  +- org.hibernate:hibernate-validator:jar:5.3.5.Final:compile
[INFO] |  |  +- javax.validation:validation-api:jar:1.1.0.Final:compile
[INFO] |  |  \- com.fasterxml:classmate:jar:1.3.3:compile
[INFO] |  +- com.fasterxml.jackson.core:jackson-databind:jar:2.8.8:compile
[INFO] |  |  +- com.fasterxml.jackson.core:jackson-annotations:jar:2.8.0:compile
[INFO] |  |  \- com.fasterxml.jackson.core:jackson-core:jar:2.8.8:compile
[INFO] |  +- org.springframework:spring-web:jar:4.3.9.RELEASE:compile
[INFO] |  \- org.springframework:spring-webmvc:jar:4.3.9.RELEASE:compile
[INFO] |     \- org.springframework:spring-expression:jar:4.3.9.RELEASE:compile
[INFO] +- org.postgresql:postgresql:jar:9.4-1206-jdbc42:compile
[INFO] +- org.springframework.boot:spring-boot-starter-test:jar:1.5.4.RELEASE:test
[INFO] |  +- org.springframework.boot:spring-boot-test:jar:1.5.4.RELEASE:test
[INFO] |  +- org.springframework.boot:spring-boot-test-autoconfigure:jar:1.5.4.RELEASE:test
[INFO] |  +- com.jayway.jsonpath:json-path:jar:2.2.0:test
[INFO] |  |  \- net.minidev:json-smart:jar:2.2.1:test
[INFO] |  |     \- net.minidev:accessors-smart:jar:1.1:test
[INFO] |  |        \- org.ow2.asm:asm:jar:5.0.3:test
[INFO] |  +- junit:junit:jar:4.12:test
[INFO] |  +- org.assertj:assertj-core:jar:2.6.0:test
[INFO] |  +- org.mockito:mockito-core:jar:1.10.19:test
[INFO] |  |  \- org.objenesis:objenesis:jar:2.1:test
[INFO] |  +- org.hamcrest:hamcrest-core:jar:1.3:test
[INFO] |  +- org.hamcrest:hamcrest-library:jar:1.3:test
[INFO] |  +- org.skyscreamer:jsonassert:jar:1.4.0:test
[INFO] |  |  \- com.vaadin.external.google:android-json:jar:0.0.20131108.vaadin1:test
[INFO] |  +- org.springframework:spring-core:jar:4.3.9.RELEASE:compile
[INFO] |  \- org.springframework:spring-test:jar:4.3.9.RELEASE:test
[INFO] +- org.springframework.boot:spring-boot-starter-thymeleaf:jar:1.5.4.RELEASE:compile
[INFO] |  +- org.thymeleaf:thymeleaf-spring4:jar:2.1.5.RELEASE:compile
[INFO] |  |  \- org.thymeleaf:thymeleaf:jar:2.1.5.RELEASE:compile
[INFO] |  |     +- ognl:ognl:jar:3.0.8:compile
[INFO] |  |     \- org.unbescape:unbescape:jar:1.1.0.RELEASE:compile
[INFO] |  \- nz.net.ultraq.thymeleaf:thymeleaf-layout-dialect:jar:1.4.0:compile
[INFO] |     \- org.codehaus.groovy:groovy:jar:2.4.11:compile
[INFO] +- org.quartz-scheduler:quartz:jar:2.1.5:compile
[INFO] |  +- c3p0:c3p0:jar:0.9.1.1:compile
[INFO] |  \- org.slf4j:slf4j-api:jar:1.7.25:compile
[INFO] +- org.jboss.resteasy:resteasy-jaxrs:jar:2.2.1.GA:compile
[INFO] |  +- org.jboss.resteasy:jaxrs-api:jar:2.2.1.GA:compile
[INFO] |  +- org.scannotation:scannotation:jar:1.0.3:compile
[INFO] |  |  \- javassist:javassist:jar:3.12.1.GA:compile
[INFO] |  +- javax.annotation:jsr250-api:jar:1.0:compile
[INFO] |  +- javax.activation:activation:jar:1.1:compile
[INFO] |  +- commons-httpclient:commons-httpclient:jar:3.1:compile
[INFO] |  |  +- commons-logging:commons-logging:jar:1.0.4:compile
[INFO] |  |  \- commons-codec:commons-codec:jar:1.10:compile
[INFO] |  +- org.apache.httpcomponents:httpclient:jar:4.5.3:compile
[INFO] |  |  \- org.apache.httpcomponents:httpcore:jar:4.4.6:compile
[INFO] |  \- net.jcip:jcip-annotations:jar:1.0:compile
[INFO] \- org.jboss.resteasy:resteasy-jackson-provider:jar:2.2.1.GA:compile
[INFO]    +- org.codehaus.jackson:jackson-core-asl:jar:1.6.3:compile
[INFO]    +- org.codehaus.jackson:jackson-mapper-asl:jar:1.6.3:compile
[INFO]    +- org.codehaus.jackson:jackson-jaxrs:jar:1.6.3:compile
[INFO]    \- org.codehaus.jackson:jackson-xc:jar:1.6.3:compile
[INFO] ------------------------------------------------------------------------

请帮助解决问题

2 个答案:

答案 0 :(得分:1)

从Resteasy依赖项中排除javassist库:

<dependency>
    <groupId>org.jboss.resteasy</groupId>
    <artifactId>resteasy-jaxrs</artifactId>
    <version>2.2.1.GA</version>
    <exclusions>
        <exclusion>
            <artifactId>javassist</artifactId>
            <groupId>javassist</groupId>
        </exclusion>
    </exclusions>
</dependency>

答案 1 :(得分:-1)

您将spring数据jpa作为依赖项包含在内,因此您应该在属性文件中提供数据源URL,db名称和密码。不这样做会导致上述错误。