SpringBoot所管理的依赖和需要的依赖冲突问题及解决
作者：起名困难综合症
背景
在使用springboot2.7.7 集成 elasticsearch7.9.3时 启动报错
Error creating bean with name 'client' defined in class path resource
[com/sgp/config/EsConfig.class]: Bean instantiation via factory method failed; nested exception
is org.springframework.beans.BeanInstantiationException: Failed to instantiate
[org.elasticsearch.client.RestHighLevelClient]: Factory method 'client' threw exception; nested
exception is java.lang.NoClassDefFoundError:
org/elasticsearch/common/xcontent/DeprecationHandler at
org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:658) ~[spring-beans-5.3.24.jar:5.3.24]
查看后发现当前项目里面不仅有我引入的 es 7.9.3 版本的jar 还有springboot 2…7.7 所默认加入7.13.1版jar，最初我的pom是这样的
<?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>
<packaging>pom</packaging>
<modules>
<module>orders</module>
</modules>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.7.7</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.sgp</groupId>
<artifactId>es-study</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>es-study</name>
<description>es-study</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>elasticsearch-rest-high-level-client</artifactId>
<version>7.9.3</version>
</dependency>
.....解决方案
网上有的说像我以上的这种写的指定依赖版本 就可以覆盖springboot所管理的依赖，但很明显在我这里并没有用，于是通过在 <properties></properties> 里加上指定版本 然后再 dependency 中通过${}引入解决掉的 （先记录一下 后面找到为什么的时候在写原因）
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<packaging>pom</packaging>
<modules>
<module>orders</module>
</modules>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.7.7</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.sgp</groupId>
<artifactId>es-study</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>es-study</name>
<description>es-study</description>
<properties>
<java.version>1.8</java.version>
<elasticsearch.version>7.9.3</elasticsearch.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>elasticsearch-rest-high-level-client</artifactId>
<version>${elasticsearch.version}</version>
</dependency>
.....总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。