Maven 清理后不编译。 “找不到标志”答案

【问题标题】：Maven does not compile after cleaning. "cannot find symbol"Maven 清理后不编译。 “找不到标志”
【发布时间】：2020-10-07 00:28:46
【问题描述】：

我已阅读有关“找不到符号”maven 错误的所有问题，但我想它们不适合我。

首先，我使用 Eclipse 开发了一个教育项目。这是一个简单的聊天，可以访问on github。它编译并运行良好，但现在我需要在没有 Eclipse 而是使用 Maven 的情况下编译它。我运行mvn clean、mvn validate（均成功）。然后mvn compile 出现错误：

C:\Users\fresh\Documents\git\SpringBootThymeleaf\SpringBootThymeleaf>mvn compile
[INFO] Scanning for projects...
[INFO]
[INFO] -----------------< ru.aconsultant:SpringBootThymeleaf >-----------------
[INFO] Building SpringBootThymeleaf 0.0.1-SNAPSHOT
[INFO] --------------------------------[ war ]---------------------------------
[INFO]
[INFO] --- maven-resources-plugin:3.1.0:resources (default-resources) @ SpringBootThymeleaf ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] Copying 22 resources
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ SpringBootThymeleaf ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 21 source files to C:\Users\fresh\Documents\git\SpringBootThymeleaf\SpringBootThymeleaf\target\classes
[INFO] /C:/Users/fresh/Documents/git/SpringBootThymeleaf/SpringBootThymeleaf/src/main/java/ru/aconsultant/thymeleaf/controller/WebSocketConfiguration.java: C:\Users\fresh\Documents\git\SpringBootThymeleaf\SpringBootThymeleaf\src\main\java\ru\aconsultant\thymeleaf\controller\WebSocketConfiguration.java uses unchecked or unsafe operations.
[INFO] /C:/Users/fresh/Documents/git/SpringBootThymeleaf/SpringBootThymeleaf/src/main/java/ru/aconsultant/thymeleaf/controller/WebSocketConfiguration.java: Recompile with -Xlint:unchecked for details.
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] /C:/Users/fresh/Documents/git/SpringBootThymeleaf/SpringBootThymeleaf/src/main/java/ru/aconsultant/thymeleaf/service/FileProcessor.java:[158,43] cannot find symbol
  symbol:   method readAllBytes()
  location: variable inputStream of type java.io.InputStream
[ERROR] /C:/Users/fresh/Documents/git/SpringBootThymeleaf/SpringBootThymeleaf/src/main/java/ru/aconsultant/thymeleaf/service/FileProcessor.java:[172,51] cannot find symbol
  symbol:   method readAllBytes()
  location: variable inputStream of type java.io.InputStream
[ERROR] /C:/Users/fresh/Documents/git/SpringBootThymeleaf/SpringBootThymeleaf/src/main/java/ru/aconsultant/thymeleaf/service/FileProcessor.java:[201,43] cannot find symbol
  symbol:   method readAllBytes()
  location: variable inputStream of type java.io.InputStream
[INFO] 3 errors
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  4.669 s
[INFO] Finished at: 2020-06-17T10:48:00+03:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project SpringBootThymeleaf: Compilation failure: Compilation failure:
[ERROR] /C:/Users/fresh/Documents/git/SpringBootThymeleaf/SpringBootThymeleaf/src/main/java/ru/aconsultant/thymeleaf/service/FileProcessor.java:[158,43] cannot find symbol
[ERROR]   symbol:   method readAllBytes()
[ERROR]   location: variable inputStream of type java.io.InputStream
[ERROR] /C:/Users/fresh/Documents/git/SpringBootThymeleaf/SpringBootThymeleaf/src/main/java/ru/aconsultant/thymeleaf/service/FileProcessor.java:[172,51] cannot find symbol
[ERROR]   symbol:   method readAllBytes()
[ERROR]   location: variable inputStream of type java.io.InputStream
[ERROR] /C:/Users/fresh/Documents/git/SpringBootThymeleaf/SpringBootThymeleaf/src/main/java/ru/aconsultant/thymeleaf/service/FileProcessor.java:[201,43] cannot find symbol
[ERROR]   symbol:   method readAllBytes()
[ERROR]   location: variable inputStream of type java.io.InputStream
[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

此外，之后即使是 Eclipse 也无法正常运行项目。附加字符串出现在起始日志中：

2020-06-17 11:20:15.433  INFO 16244 --- [           main] .s.s.UserDetailsServiceAutoConfiguration : 

Using generated security password: fe0f803b-2116-43b6-910c-47e5b11b168b

出现了一些默认的 spring 安全登录页面，而不是我的自定义页面。当我在 Eclipse 中创建“Project -> Clean”时，这些问题就消失了。

如果我通过 Eclipse 清理并运行项目，而不是用 maven 编译它（没有mvn clean），它也成功了。

我完全意识到依赖项或导入存在一些问题，但我不知道究竟是什么。我什至用相同的 POM 创建了一个新项目——maven 成功编译了它。我在下面提供了我的 POM：

<?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>2.2.7.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>ru.aconsultant</groupId>
    <artifactId>SpringBootThymeleaf</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>
    <name>SpringBootThymeleaf</name>
    <description>Spring Boot and Thymeleaf</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-security.version>5.3.2.RELEASE</spring-security.version>
        <spring.version>5.0.6.RELEASE</spring.version>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</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-websocket</artifactId>
        </dependency>

        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>webjars-locator</artifactId>
            <version>0.36</version>
        </dependency>

        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>sockjs-client</artifactId>
            <version>1.0.2</version>
        </dependency>

        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>stomp-websocket</artifactId>
            <version>2.3.3</version>
        </dependency>

        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>bootstrap</artifactId>
            <version>3.3.7</version>
        </dependency>

        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>jquery</artifactId>
            <version>3.1.0</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>com.zaxxer</groupId>
                    <artifactId>HikariCP</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-jdbc</artifactId>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <scope>runtime</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-core</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-config</artifactId>
        </dependency>

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

        <dependency>
            <groupId>net.sourceforge.jtds</groupId>
            <artifactId>jtds</artifactId>
            <scope>runtime</scope>
        </dependency> 

        <!-- #refactor --> 
        <dependency>
            <groupId>org.springframework.session</groupId>
            <artifactId>spring-session-core</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.session</groupId>
            <artifactId>spring-session-jdbc</artifactId>
        </dependency>

        <dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20190722</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.11.0</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>

        <dependency>
            <groupId>javax.servlet.jsp.jstl</groupId>
            <artifactId>jstl-api</artifactId>
            <version>1.2</version>
        </dependency>   

        <!-- file processing -->
        <dependency>
            <groupId>commons-net</groupId>
            <artifactId>commons-net</artifactId>
            <version>3.6</version>
        </dependency>

        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>1.3.2</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>

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

            <plugin>
              <groupId>org.apache.maven.plugins</groupId>
              <artifactId>maven-surefire-plugin</artifactId>
            </plugin>

        </plugins>
    </build>

</project>

感谢您的任何想法！

【问题讨论】：

嗯，应该是java版本吧，应该是9以上吧。仍在检查。

标签： java eclipse maven spring-security dependencies

【解决方案1】：

问题出在 java 版本中。支持方法 readAllBytes() only from 9th jdk。我没有提到它，因为我的 POM 中有 java 版本 1.8，但 Eclipse 在它安装的库中有 jdk 14 并以某种方式将其用于编译。

【讨论】：