无法执行目标 org.springframework.boot:spring-boot-..:2.1.8。运行时发生异常。无效的

Question

我是 SpringMVC 的新手，被困在这里。我通过 Spring Initializr 创建了一个 Spring Boot 应用程序，然后创建 HomeController，将其连接到 index.jsp。它正在工作很好，但是当我添加 SearchController、连接 search.jsp 时，它现在不工作。在添加 SearcController 之前，应用程序是运行宁很好，但它说：

无法在项目 hplus 上执行目标...插件:2.4.0:运行（默认 cli）：应用程序已完成，退出代码为：1

Update: 在做了一些搜索后我发现我的数据库服务器不是运行ning，在运行ning 之后，运行ning 我的申请是测试，报错。

访问DialectResolutionInfo时不能为null 'hibernate.dialect' 未设置 .

Full Error!
Test set:HplusappApplicationTests
<<< ERROR!
java.lang.IllegalStateException: Failed to load ApplicationContext
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
Caused by: org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
Caused by: org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set

.

pom.xml file ->
<code>
xml 
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" 
 xmlns:xsi="http://www.w3.org/2001/XMLSchema- 
    instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
  https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.4.0</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>spring-example</groupId>
<artifactId>myapp</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>myapp</name>
<description>Demo project for Spring Boot</description>

<properties>
    <java.version>1.8</java.version>
</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-web</artifactId>
    </dependency>

    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <scope>runtime</scope>
    </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-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
    </dependency>

    <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-jasper</artifactId>
        <scope>provided</scope>
    </dependency>
</dependencies>

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

</project>

application.properties ->

spring.jpa.hibernate.ddl-auto=update
spring.datasource.url=jdbc:mysql://localhost:3306/hplus
spring.datasource.username=root
spring.datasource.password=root

Answer 1

[ERROR] No goals have been specified for this build. You must specify a valid lifecycle phase or a goal in the format <plugin-prefix>:<goal> or <plugin-group-id>:<plugin-artifact-id>[:<plugin-version>]:<goal>. Available lifecycle phases are: validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy, pre-clean, clean, post-clean, pre-site, site, post-site, site-deploy. -> [Help 1]

它清楚地表明你输入了一个错误的mvn命令。 你执行的命令是什么？ 我们一般运行mvn clean install来构建一个应用。以下是可能对您有所帮助的 Maven commands 列表。

Answer 2

您需要指定 MySQL Hibernate 应使用的方言：

将其放入 application.properties:

spring.jpa.database-platform=org.hibernate.dialect.MySQL5InnoDBDialect

Answer 3

在定义 bean 和你的 pom 文件时似乎有错误，你是否尝试过运行全新安装，

mvn clean instal

命令？如果仍然不起作用，请尝试查看您的 pom 和 application.properties 文件是否还有一些混合版本？如果仍然不起作用，请尝试删除您的 .m2 文件并再次运行 mvn clean install。

Answer 4

解决方案 找了两天多，发现是timeZone的问题

我编辑了 application.properties，第二行 ->

spring.datasource.url=jdbc:mysql://localhost:3306/hplus?useSSL=false&serverTimezone=UTC&useLegacyDatetimeCode=false

问题解决了。

无法执行目标 org.springframework.boot:spring-boot-..:2.1.8。运行时发生异常。无效的

Failed to execute goal org.springframework.boot:spring-boot-..:2.1.8. An exception occurred while running. null

spring

spring-mvc

maven

spring-boot

java-ee-8

无法执行目标 org.springframework.boot:spring-boot-..:2.1.8。 运行 时发生异常。无效的

Failed to execute goal org.springframework.boot:spring-boot-..:2.1.8. An exception occurred while running. null

spring

spring-mvc

maven

spring-boot

java-ee-8

无法执行目标 org.springframework.boot:spring-boot-..:2.1.8。运行时发生异常。无效的