easyexcel-3.0.5.jar
时间: 2023-09-21 18:01:14 浏览: 231
easyexcel-3.0.5.jar是一个Java类库,它提供了一种简单易用的方式来读取和写入Excel文件。它基于Apache POI开发,可以在Java应用程序中方便地进行Excel文件的操作。
easyexcel-3.0.5.jar具有以下特点:
1. 强大的数据导入和导出功能:easyexcel-3.0.5.jar能够将Java对象列表快速导入到Excel文件中,并且可以将Excel文件中的数据导出为Java对象列表。它支持复杂的数据格式,如日期、数字、字符串等,并且可以自动处理大量数据的导入和导出。
2. 高性能和低内存占用:easyexcel-3.0.5.jar采用流式读写的方式处理Excel文件,可以大大减少内存占用,提高读写的性能。它使用了基于XML的Excel文件格式,对大型Excel文件的读写有着较好的表现。
3. 简单易用的API:easyexcel-3.0.5.jar提供了简单易用的API,使得开发人员能够快速了解和使用该类库。它提供了丰富的方法和属性来控制Excel文件的读写操作,如指定读取的起始位置、指定写入的列宽和行高等。
4. 跨平台支持:easyexcel-3.0.5.jar可以在各种操作系统上运行,并且与不同版本的Java和Apache POI兼容。它支持常见的Excel文件格式,如xls和xlsx,可以满足不同项目的需要。
总之,easyexcel-3.0.5.jar是一个功能强大、易于使用且高性能的Java类库,能够方便地进行Excel文件的读写操作,是开发人员在处理Excel文件时的一种优秀选择。
相关问题
[WARNING] 'dependencyManagement.dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: cn.dev33:sa-token-dao-redis-jackson:jar -> duplicate declaration of version 1.33.0 @ com.jian:ji_an_riding_master:1.0.0-SNAPSHOT, D:\develop\TaiYangGongShe_v2\ji_an_riding_master\pom.xml, line 205, column 25 [WARNING] 'dependencyManagement.dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: com.alibaba:easyexcel:jar -> version 3.1.1 vs 3.0.5 @ com.jian:ji_an_riding_master:1.0.0-SNAPSHOT, D:\develop\TaiYangGongShe_v2\ji_an_riding_master\pom.xml, line 211, column 25 [WARNING] [WARNING] It is highly recommended to fix these problems because they threaten the stability of your build. [WARNING] [WARNING] For this reason, future Maven versions might no longer support building such malformed projects. [WARNING] [INFO] [INFO] --------------------------< com.jian:manage >--------------------------- [INFO] Building 后端管理模块 1.0.0-SNAPSHOT [INFO] from pom.xml [INFO] --------------------------------[ jar ]--------------------------------- [WARNING] The POM for com.jian:service:jar:1.0.0-SNAPSHOT is missing, no dependency information available [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 0.484 s [INFO] Finished at: 2025-03-24T16:19:02+08:00 [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal on project manage: Could not resolve dependencies for project com.jian:manage:jar:1.0.0-SNAPSHOT [ERROR] dependency: com.jian:service:jar:1.0.0-SNAPSHOT (compile) [ERROR] Could not find artifact com.jian:service:jar:1.0.0-SNAPSHOT [ERROR] [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 m
<think>嗯,用户遇到了Maven构建的问题,我得仔细看看他提供的错误信息。首先,错误分为两个部分:依赖管理中的重复声明和依赖项缺失的问题。
先看第一个警告,关于dependencyManagement里的重复依赖。用户有两个不同的依赖,sa-token-dao-redis-jackson和easyexcel,都声明了不同的版本。Maven在dependencyManagement中要求每个依赖的唯一性,所以重复声明会导致警告。用户需要检查pom.xml文件里提到的行数,比如205和211行,确保每个groupId和artifactId组合只出现一次,并且版本号统一。可能需要删除其中一个重复的条目,或者合并版本号。
接下来是第二个错误,关于找不到com.jian:service:jar:1.0.0-SNAPSHOT。这个模块可能是一个子模块,但Maven在构建时无法找到它。可能的原因是service模块没有被正确安装到本地仓库,或者pom.xml中没有正确声明子模块。用户需要确认父项目的pom.xml中是否包含了service模块作为<module>,并且是否已经成功构建并安装了该模块。如果service模块存在,应该先构建父项目,或者单独构建service模块,确保它生成并安装到本地仓库中。
另外,用户需要注意构建顺序。Maven可能需要先构建依赖的模块,比如service,然后再构建manage模块。使用mvn clean install命令从根目录开始构建,可以确保所有子模块按顺序构建。
总结下来,解决步骤应该是先处理重复的依赖声明,确保dependencyManagement中的每个依赖唯一,版本一致。然后检查service模块是否存在,是否正确声明为子模块,并确保它被正确构建和安装。可能还需要检查本地仓库中是否存在该jar包,或者是否有构建错误导致service模块没有生成。
用户可能需要逐步执行这些步骤,先解决依赖重复的问题,再处理缺失的依赖。如果用户不太确定如何操作,可能需要指导他们如何检查pom.xml文件的结构,确认子模块的配置,以及如何正确运行Maven命令来构建整个项目。</think>这个问题主要涉及Maven构建时的两个关键错误,我们分步骤解析和解决:
$\textcolor{red}{第一类问题:依赖冲突}$
1. **sa-token重复声明**
$\textcolor{blue}{定位文件}$: `D:\develop\TaiYangGongShe_v2\ji_an_riding_master\pom.xml` 第205行
$\textcolor{blue}{冲突内容}$: `cn.dev33:sa-token-dao-redis-jackson` 声明了重复的1.33.0版本
$\textcolor{green}{解决方案}$: 保留一个版本声明,删除其他重复条目
2. **easyexcel版本冲突**
$\textcolor{blue}{定位文件}$: 同文件第211行
$\textcolor{blue}{冲突内容}$: `com.alibaba:easyexcel` 存在3.1.1和3.0.5两个版本
$\textcolor{green}{解决方案}$: 统一使用较新的3.1.1版本,删除旧版本声明
$\textcolor{red}{第二类问题:依赖缺失}$
1. **服务模块缺失**
$\textcolor{blue}{错误提示}$: `Could not find artifact com.jian:service:jar:1.0.0-SNAPSHOT`
$\textcolor{blue}{问题根源}$:
- 未正确安装`service`模块到本地仓库
- 未在父POM中声明`service`子模块
- `service`模块本身存在构建错误
2. **验证步骤**:
$\textcolor{orange}{步骤1}$ 检查父项目的`pom.xml`是否包含:
```xml
<modules>
<module>service</module>
<module>manage</module>
</modules>
```
$\textcolor{orange}{步骤2}$ 确认`service`目录存在且包含有效POM文件
$\textcolor{orange}{步骤3}$ 尝试单独构建服务模块:
```bash
mvn clean install -pl service -am
```
$\textcolor{red}{推荐修复流程}$:
1. 从项目根目录执行:
```bash
mvn clean install -DskipTests
```
2. 若仍失败,添加-U参数强制更新:
```bash
mvn clean install -U -DskipTests
```
$\textcolor{blue}{架构建议}$:
1. 使用`mvn dependency:tree`生成依赖树检查冲突
2. 在父POM中统一管理公共依赖版本
3. 定期执行`mvn clean install`保证本地仓库同步
$\textcolor{green}{最终验证}$:
构建成功后应看到类似输出:
```
[INFO] BUILD SUCCESS
[INFO] Total time: XX.XXX s
```
<?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>2.3.12.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.goldwind.ipark</groupId> <artifactId>search-component-by-img-service</artifactId> <version>1.0.0</version> <name>search-component-by-img-service</name> <description>search-component-by-img-service</description> <properties> <java.version>1.8</java.version> <elasticsearch.version>7.17.3</elasticsearch.version> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> <spring-boot-admin.version>2.4.3</spring-boot-admin.version> <spring-cloud.version>Hoxton.SR9</spring-cloud.version> <spring-cloud-alibaba-version>2.2.6.RELEASE</spring-cloud-alibaba-version> <skywalking.version>8.3.0</skywalking.version> <swagger.version>3.0.0</swagger.version> <poi.version>4.1.0</poi.version> <easypoi.version>4.1.2</easypoi.version> <maven.test.skip>true</maven.test.skip> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-mail</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.session</groupId> <artifactId>spring-session-data-redis</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-configuration-processor</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.session</groupId> <artifactId>spring-session-core</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>cn.hutool</groupId> <artifactId>hutool-all</artifactId> <version>5.7.11</version> </dependency> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger2</artifactId> <version>2.7.0</version> </dependency> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger-ui</artifactId> <version>2.7.0</version> </dependency> <dependency> <groupId>org.apache.skywalking</groupId> <artifactId>apm-toolkit-logback-1.x</artifactId> <version>${skywalking.version}</version> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-pool2</artifactId> </dependency> <dependency> <groupId>com.xuxueli</groupId> <artifactId>xxl-job-core</artifactId> <version>2.1.2</version> </dependency> <dependency> <groupId>com.github.jsqlparser</groupId> <artifactId>jsqlparser</artifactId> <version>4.2</version> </dependency> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>5.2.1</version> <exclusions> <exclusion> <groupId>com.github.jsqlparser</groupId> <artifactId>jsqlparser</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.4.3.4</version> </dependency> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-generator</artifactId> <version>3.5.1</version> </dependency> <dependency> <groupId>com.github.jeffreyning</groupId> <artifactId>mybatisplus-plus</artifactId> <version>1.5.1-RELEASE</version> </dependency> <dependency> <groupId>org.freemarker</groupId> <artifactId>freemarker</artifactId> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <version>1.2.6</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>io.minio</groupId> <artifactId>minio</artifactId> <version>7.1.0</version> </dependency> <dependency> <groupId>org.springframework.kafka</groupId> <artifactId>spring-kafka</artifactId> </dependency> <dependency> <groupId>org.redisson</groupId> <artifactId>redisson-spring-data-23</artifactId> <version>3.17.1</version> </dependency> <dependency> <groupId>org.redisson</groupId> <artifactId>redisson-spring-boot-starter</artifactId> <version>3.17.1</version> <exclusions> <exclusion> <groupId>org.redisson</groupId> <artifactId>redisson-spring-data-26</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.elasticsearch.client</groupId> <artifactId>elasticsearch-rest-high-level-client</artifactId> </dependency> <dependency> <groupId>com.goldwind.ipark</groupId> <artifactId>iparkcommon</artifactId> <version>1.0.0-SNAPSHOT</version> </dependency> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpcore</artifactId> </dependency> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpmime</artifactId> </dependency> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> </dependency> <dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> </dependency> <dependency> <groupId>net.sf.json-lib</groupId> <artifactId>json-lib</artifactId> <version>2.2.2</version> <classifier>jdk15</classifier> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.78</version> </dependency> <dependency> <groupId>io.jsonwebtoken</groupId> <artifactId>jjwt</artifactId> <version>0.9.0</version> </dependency> <dependency> <groupId>org.jfree</groupId> <artifactId>jfreechart</artifactId> <version>1.5.0</version> </dependency> <dependency> <groupId>commons-net</groupId> <artifactId>commons-net</artifactId> <version>3.8.0</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>1.3.2</version> </dependency> <dependency> <groupId>org.jodd</groupId> <artifactId>jodd-core</artifactId> <version>5.3.0</version> </dependency> <dependency> <groupId>org.codehaus.groovy</groupId> <artifactId>groovy</artifactId> <version>2.4.12</version> </dependency> <dependency> <groupId>cz.mallat.uasparser</groupId> <artifactId>uasparser</artifactId> <version>0.6.2</version> </dependency> <dependency> <groupId>me.wanghuifeng</groupId> <artifactId>ronglian-sms-sdk</artifactId> <version>1.0</version> <exclusions> <exclusion> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>net.coobird</groupId> <artifactId>thumbnailator</artifactId> <version>0.4.18</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>${poi.version}</version> <scope>compile</scope> <optional>false</optional> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>${poi.version}</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml-schemas</artifactId> <version>${poi.version}</version> </dependency> <dependency> <groupId>org.hibernate.validator</groupId> <artifactId>hibernate-validator</artifactId> <version>6.2.0.Final</version> </dependency> <dependency> <groupId>cn.afterturn</groupId> <artifactId>easypoi-base</artifactId> <version>${easypoi.version}</version> </dependency> <dependency> <groupId>cn.afterturn</groupId> <artifactId>easypoi-web</artifactId> <version>${easypoi.version}</version> </dependency> <dependency> <groupId>cn.afterturn</groupId> <artifactId>easypoi-annotation</artifactId> <version>${easypoi.version}</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>easyexcel</artifactId> <version>3.0.5</version> </dependency> <dependency> <groupId>net.lingala.zip4j</groupId> <artifactId>zip4j</artifactId> <version>2.11.5</version> <!-- 检查最新版本 --> </dependency> <dependency> <groupId>io.milvus</groupId> <artifactId>milvus-sdk-java</artifactId> <version>2.5.10</version> <exclusions> <exclusion> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> </exclusion> <exclusion> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-core</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>com.google.protobuf</groupId> <artifactId>protobuf-java</artifactId> <version>3.21.12</version> </dependency> <dependency> <groupId>com.amazonaws</groupId> <artifactId>aws-java-sdk-s3</artifactId> <version>1.11.901</version> </dependency> <dependency> <groupId>org.locationtech.proj4j</groupId> <artifactId>proj4j</artifactId> <version>1.2.3</version> </dependency> <dependency> <groupId>com.drewnoakes</groupId> <artifactId>metadata-extractor</artifactId> <version>2.15.0</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>QLExpress</artifactId> <version>3.2.4</version> </dependency> </dependencies> <build> <resources> <resource> <directory>src/main/resources</directory> <filtering>true</filtering> </resource> </resources> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <excludes> <exclude> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </exclude> </excludes> </configuration> </plugin> <plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>1.3.5</version> <configuration> <verbose>true</verbose> <overwrite>true</overwrite> </configuration> <executions> <execution> <id>Generate MyBatis Artifacts</id> </execution> </executions> <dependencies> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.19</version> </dependency> </dependencies> </plugin> </plugins> </build> <profiles> <profile> <id>dev</id> <properties> <profileActive>dev</profileActive> </properties> </profile> </profiles> </project> 以上是 java springboot 工程的 pom.xml 的完整内容,现在启动工程报错 Caused by: java.lang.ClassNotFoundException: com.google.protobuf.MapFieldReflectionAccessor,帮我分析原因,告诉我如何修改?
<think>根据用户提供的引用资料和当前问题,用户需要解决SpringBoot工程启动时出现的java.lang.ClassNotFoundException:com.google.protobuf.MapFieldReflectionAccessor错误。这个错误表示运行时无法加载指定的类。结合引用[1]到[4]的分析思路,该错误通常由以下原因导致:1.依赖缺失:项目未正确引入包含该类的依赖库(google-protobuf相关jar包)2.版本冲突:项目中存在多个protobuf版本,导致类加载器无法找到特定版本的类3.构建问题:依赖未正确打包(如Maven/Gradle配置问题)解决方案步骤如下:1.添加protobuf依赖在Maven项目的pom.xml中添加:```xml<dependency><groupId>com.google.protobuf</groupId><artifactId>protobuf-java</artifactId><version>3.22.0</version><!--根据实际需要选择版本--></dependency>```或Gradle项目build.gradle中添加:```groovyimplementation'com.google.protobuf:protobuf-java:3.22.0'```2.检查依赖冲突执行命令查看依赖树:Maven:mvndependency:treeGradle:gradledependencies检查是否存在多个protobuf版本冲突,若有则通过<exclusions>排除旧版本3.验证依赖完整性-Maven项目执行mvncleaninstall-Gradle项目执行gradlecleanbuild确保依赖被正确下载4.检查构建配置确认打包插件(如spring-boot-maven-plugin)正确包含所有依赖5.如果使用特定功能(如gRPC),可能需要添加:```xml<dependency><groupId>com.google.protobuf</groupId><artifactId>protobuf-java-util</artifactId><version>3.22.0</version></dependency>```特别注意:MapFieldReflectionAccessor类在protobuf3.6+版本中存在,需确保版本>=3.66.若问题依旧,尝试清除本地仓库缓存(删除.m2/repository/com/google/protobuf目录后重新构建)7.最后检查运行时环境(如Tomcat)的classpath是否包含该jar包</think>
## 错误分析与解决方案:`java.lang.ClassNotFoundException: com.google.protobuf.MapFieldReflectionAccessor`
### 原因分析
1. **依赖缺失**(主要原因)
Spring Boot应用在启动时缺少必要的Protocol Buffers(Protobuf)依赖库,特别是包含`MapFieldReflectionAccessor`的包[^1]。
2. **版本冲突**
项目可能存在多个Protobuf版本,导致类加载器加载了旧版本(无目标类)[^2]。
3. **构建配置问题**
依赖未正确打包到部署包中(如Maven/Gradle构建配置错误)[^3]。
4. **间接依赖缺失**
第三方库(如gRPC、Spring Cloud Sleuth等)依赖Protobuf但未显式声明[^4]。
---
### 解决方案
#### ✅ 方法1:添加显式依赖(推荐)
在`pom.xml`中添加Google Protocol Buffers的依赖:
```xml
<dependency>
<groupId>com.google.protobuf</groupId>
<artifactId>protobuf-java</artifactId>
<version>3.22.0</version> <!-- 确保版本≥3.6(引入目标类) -->
</dependency>
```
> **关键点**:`MapFieldReflectionAccessor`首次出现在Protobuf 3.6+版本[^1]
#### ✅ 方法2:解决依赖冲突
1. 检查依赖树:
```bash
mvn dependency:tree | grep 'com.google.protobuf'
```
或Gradle项目:
```bash
gradle dependencies | grep 'com.google.protobuf'
```
2. 若存在旧版本,强制指定版本:
```xml
<properties>
<protobuf.version>3.22.0</protobuf.version>
</properties>
<dependency>
<groupId>com.google.protobuf</groupId>
<artifactId>protobuf-java</artifactId>
<version>${protobuf.version}</version>
</dependency>
```
#### ✅ 方法3:验证构建配置
1. 清理并重新构建:
```bash
mvn clean package
```
2. 检查生成的JAR/WAR中是否包含`protobuf-java-*.jar`:
```bash
unzip -l target/*.jar | grep 'MapFieldReflectionAccessor'
```
#### ✅ 方法4:特殊场景处理
若使用gRPC等框架,需补充:
```xml
<dependency>
<groupId>io.grpc</groupId>
<artifactId>grpc-protobuf</artifactId>
<version>1.54.0</version>
</dependency>
```
---
### 验证步骤
1. 添加依赖后执行:
```bash
mvn clean spring-boot:run
```
2. 检查启动日志中是否出现错误
3. 使用调试器验证类加载:
```java
Class.forName("com.google.protobuf.MapFieldReflectionAccessor"); // 测试类加载
```
> **注意**:若使用JDK 9+,需检查`module-info.java`是否开放反射权限:
> ```java
> opens your.package to com.google.protobuf;
> ```
---
### 预防措施
1. **显式声明关键依赖**:避免依赖传递不确定性
2. **版本对齐**:统一管理Protobuf版本:
```xml
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.google.protobuf</groupId>
<artifactId>protobuf-bom</artifactId>
<version>3.22.0</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
```
3. 定期执行:`mvn versions:display-dependency-updates`
[^1]: 类加载失败直接反映依赖缺失
[^2]: 版本冲突是ClassNotFound的常见原因
[^3]: 构建问题导致依赖未打包
[^4]: 第三方库间接依赖需显式声明
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