1 强制约束版本号
-
项目结构如下,所有项目都依赖mall-common
项目结构
-
mall-common中依赖
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.58</version>
</dependency>
- mall-order中依赖
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.1.58</version>
</dependency>
- mall-order依赖结构如下
mall-order ->
mall-common ->
fastjson-1.2.58
mall-order ->
fastjson-1.1.58
- 此时就近原则生效,mall-order.jar中只存在fastjson-1.1.58,XXX Not Found问题
2 如何强制约束版本号
- 针对mall-common,开发一个pom包(mall-common-bom)，该pom包专门用dependencyManagement来约束依赖方的各个版本号
- 依赖方(mall-order)不直接依赖mall-common,而是依赖于mall-common-bom,此时mall-order在dependency声明fastjson依赖时,在对fastjson自定义依赖版本时,pom就会报错
3 项目使用
mall-common
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.58</version>
</dependency>
---------------------------------------------------------------------------------------------------------
mall-common-bom
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.mall.common</groupId>
<artifactId>mall-common</artifactId>
<version>1.0.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.58</version>
</dependency>
</dependencies>
</dependencyManagement>
---------------------------------------------------------------------------------------------------------
mall-order
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.mall.common</groupId>
<artifactId>mall-common-bom</artifactId>
<version>1.0.0</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<!-- 此时如果声明fastjson的依赖版本号,pom文件报错-->
<dependencies>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.1.58</version>
</dependency>
</dependencies>
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