Maven无法导入Jackson库，编译报包不存在错误求助

云上老周

2026-4-14

嘿，我最近在做roadmap.sh上的入门后端项目——CLI任务追踪器，这是我第一次做CLI项目，本来以为没啥问题，但自从尝试引入Jackson JSON库后就彻底卡壳了。项目在没加这个库之前运行完全正常，但现在每次编译都弹出一堆找不到包的错误：

error: package com.fasterxml.jackson.core does not exist
error: package com.fasterxml.jackson.annotations does not exist
error: package com.fasterxml.jackson.databind does not exist

我跟着教程用Maven来管理依赖，把Jackson的三个核心包都加到了pom.xml里，但Maven好像就是没法把这些库导入到项目里。我已经折腾了两周，翻了五十多篇帖子和各种没用的安装指南，还是没解决问题。

先给大家看看我的pom.xml内容：

<project xmlns="https://maven.apache.org/POM/4.0.0" xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="https://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <dependencies>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.18.2</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-annotations</artifactId>
      <version>2.18.2</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.18.2</version>
    </dependency>
  </dependencies>
  <groupId>TaskTracker.maven.org</groupId>
  <artifactId>TaskTracker</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>TaskTracker</name>
</project>

我当前用的是Eclipse，JDK版本是22，不太清楚classpath和模块的区别，但应该是用classpath的模式。

我已经试过的方法有：

切换为Maven项目
从头创建项目3次
修改pom.xml（换版本、调整依赖内容）
添加额外依赖
手动把jar包导入到classpath
创建module-info文件，之后又删掉了

另外，我运行mvn clean package时还遇到了新的错误，日志如下：

[INFO] Scanning for projects...
[INFO]
[INFO] -----------------&lt; TaskTracker.maven.org:TaskTracker &gt;------------------
[INFO] Building TaskTracker 0.0.1-SNAPSHOT
[INFO]   from pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- clean:3.2.0:clean (default-clean) @ TaskTracker ---
[INFO] Deleting C:\Users\Dante-PC\Documents\JavaProjects\TaskTracker\target
[INFO]
[INFO] --- resources:3.3.1:resources (default-resources) @ TaskTracker ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 0 resource from src\main\resources to target\classes
[INFO]
[INFO] --- compiler:3.13.0:compile (default-compile) @ TaskTracker ---
[INFO] Recompiling the module because of changed source code.
[WARNING] File encoding has not been set, using platform encoding UTF-8, i.e. build is platform dependent!
[INFO] Compiling 3 source files with javac [debug target 1.8] to target\classes
[INFO] -------------------------------------------------------------
[WARNING] COMPILATION WARNING :
[INFO] -------------------------------------------------------------
[WARNING] bootstrap class path is not set in conjunction with -source 8
  not setting the bootstrap class path may lead to class files that cannot run on JDK 8
    --release 8 is recommended instead of -source 8 -target 1.8 because it sets the bootstrap class path automatically
[WARNING] source value 8 is obsolete and will be removed in a future release
[WARNING] target value 8 is obsolete and will be removed in a future release
[WARNING] To suppress warnings about obsolete options, use -Xlint:-options.
[INFO] 4 warnings
[INFO] -------------------------------------------------------------
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] /C:/Users/Dante-PC/Documents/JavaProjects/TaskTracker/src/main/java/TaskTracker.java:[95,36] text blocks are not supported in -source 8
  (use -source 15 or higher to enable text blocks)
[INFO] 1 error
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  0.843 s
[INFO] Finished at: 2025-02-23T10:40:02-03:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.13.0:compile (default-compile) on project TaskTracker: Compilation failure
[ERROR] /C:/Users/Dante-PC/Documents/JavaProjects/TaskTracker/src/main/java/TaskTracker.java:[95,36] text blocks are not supported in -source 8
[ERROR]   (use -source 15 or higher to enable text blocks)
[ERROR]
[ERROR] -&gt; [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

实在不知道该从哪下手了，有没有大佬能给点建议？

备注：内容来源于stack exchange，提问作者Dante Ariel Gatica Altamirano