Spring Boot项目报错java: package javax.persistance does not exist求助

问题根源 #

你的pom.xml存在冗余依赖冲突，且错误提示里的包名有拼写错误（正确包名是javax.persistence，你写的是javax.persistance）。

Spring Boot的spring-boot-starter-data-jpa已经默认包含了JPA API和Hibernate核心依赖，额外添加的javax.persistence-api和hibernate-entitymanager会导致版本冲突，反而让编译器无法找到正确的包。

修正后的pom.xml #

删除多余依赖，保留核心starter即可：

<?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>2.7.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.scode</groupId>
    <artifactId>Demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>Demo</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>19</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <!-- 仅保留该starter，已包含所有JPA相关依赖 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

后续操作步骤 #

• 检查代码中所有导入语句，确保包名是import javax.persistence.*;（注意是persistence，不是persistance）
• 执行Maven命令清理缓存：mvn clean install -U
• 在IDE中重新导入Maven项目（如IDEA点击Maven面板的"Reload All Maven Projects"）
• 重新编译项目

内容的提问来源于stack exchange，提问作者Samanthika Rajapaksa