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我是Spring Boot的新手，在尝试更新spring-boot-starter-parent父项目时遇到了一些问题。

所以，一开始我有这个pom.xml文件（它工作正常，我可以构建项目，我没有问题）：

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.springboot</groupId>
    <artifactId>excel-api</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>Excel API with Spring Boot</name>
    <description>Spring Boot - working with Excel API</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.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>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-data</artifactId>
        </dependency>

        <!-- Start of excel dependencies -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.11</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.11</version>
        </dependency>
        <!-- End of excel dependencies -->
    </dependencies>

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

</project>

如您所见，此pom.xml文件包含此部分：

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.9.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

如果我的断言错误，请纠正我：据我了解，这意味着我的pom.xml文件是spring-boot-starter-parent项目的另一个pom.xml文件的子文件，版本为 1.5.9.RELEASE。这个推理正确吗？如果这个pom.xml文件在哪里定义？

所以目前我成功地使用了这个父项目的1.5.9.RELEASE版本。它很老了，我想将它更新到最后一个2.2.5.RELEASE，如下所示：

https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-parent

所以我只改变了前一个pom.xml文件的部分以这种方式：

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.2.5.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

问题是试图通过这个 Maven 命令构建项目：

mvn clean install -DskipTests=true

我收到以下错误消息：

[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] /home/developer/git/SOC-dashboard/src/main/java/com/springboot/excelapi/Application.java:[6,44] package org.springframework.boot.web.support does not exist
[ERROR] /home/developer/git/SOC-dashboard/src/main/java/com/springboot/excelapi/Application.java:[9,34] cannot find symbol
  symbol: class SpringBootServletInitializer
[ERROR] /home/developer/git/SOC-dashboard/src/main/java/com/springboot/excelapi/Application.java:[15,9] method does not override or implement a method from a supertype
[INFO] 3 errors 
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  2.349 s
[INFO] Finished at: 2020-03-20T05:48:14-07:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project excel-api: Compilation failure: Compilation failure: 
[ERROR] /home/developer/git/SOC-dashboard/src/main/java/com/springboot/excelapi/Application.java:[6,44] package org.springframework.boot.web.support does not exist
[ERROR] /home/developer/git/SOC-dashboard/src/main/java/com/springboot/excelapi/Application.java:[9,34] cannot find symbol
[ERROR]   symbol: class SpringBootServletInitializer
[ERROR] /home/developer/git/SOC-dashboard/src/main/java/com/springboot/excelapi/Application.java:[15,9] method does not override or implement a method from a supertype
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
4

1 回答 1

2

这是从 1.x 到 2.x 的主要 Spring 版本升级。在此类主要版本升级期间，通常会发生重大更改，例如包重组、删除已弃用的类/方法等。此类升级最好参考某种迁移指南。您可以参考官方迁移指南或其他一些博客，例如this。

Spring 提供了一个依赖模块，可以将其添加到您的 pom 文件中。此模块分析应用程序并为所需更改提供诊断输出。

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-properties-migrator</artifactId>
    <scope>runtime</scope>
</dependency>

针对问题中提出的具体问题；

[ERROR] /home/developer/git/SOC-dashboard/src/main/java/com/springboot/excelapi/Application.java:[9,34] cannot find symbol
[ERROR]   symbol: class SpringBootServletInitializer

现在SpringBootServletInitializer可以从org.springframework.boot.web.servlet.support包装中获得。

于 2020-03-25T09:20:23.663 回答