eclipse Spring Boot - javax 导入语句无法正常工作
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Spring Boot - javax Import statements not working correctly
提问by Brandon Hewlett
I just started working with Spring Boot, and am currently following this tutorialwith some small modifications to naming and using their own version of Eclipse, which has this generatorbuilt in.
我刚开始使用Spring Boot，目前正在关注本教程，对命名和使用他们自己的版本进行了一些小的修改Eclipse，其中内置了这个生成器。
When I get to the first snippet of code, I try just copying over the importstatements to start with,
当我到达第一个代码片段时，我尝试复制导入语句以开始，
import com.fasterxml.Hymanson.annotation.JsonIgnore;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import java.util.HashSet;
import java.util.Set;
which gets me the following error with the javax imports:
这让我在 javax 导入时出现以下错误：
The import javax.persistence.[insert name here] cannot be resolved
When I find the javax.persistencepackage, I find that, sure enough, the starter code provided from their own service does not contain the listed packages. I'm left confused and wondering if I did something wrong in the initial steps. Anyone have any ideas?
当我找到这个javax.persistence包时，我发现，果然，他们自己的服务提供的入门代码不包含列出的包。我很困惑，想知道我是否在最初的步骤中做错了什么。谁有想法？
Edit 1: pom content provided
编辑 1：提供 pom 内容
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.Me</groupId>
<artifactId>petstore</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>petstore</name>
<description>Petstore Project</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.5.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
</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-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
回答by Aman Tuladhar
Add spring-boot-starter-data-jpadependency
添加 spring-boot-starter-data-jpa依赖
If you are using Mavenadd to pom.xml
如果您使用Maven添加到pom.xml
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
If you are using Gradleadd in build.gradle
如果您Gradle在build.gradle中使用add
compile "org.springframework.boot:spring-boot-starter-data-jpa"
for other refer this.
其他参考这个。
回答by Saad Ahmed
Add this dependency in you pom.xml
在 pom.xml 中添加此依赖项
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.0-api</artifactId>
<version>1.0.1.Final</version>
</dependency>
After that Right click on your project and in maven option update your project. That should fix it.
之后右键单击您的项目并在 maven 选项中更新您的项目。那应该解决它。
回答by Harun ERGUL
In my case i have added below spring boot data dependency but still not be able to import javax.persistence.*
就我而言，我在 spring boot 数据依赖项下添加了以下内容，但仍然无法导入 javax.persistence.*
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
I realized that eclipse somehow not be able to adding this dependencies to my classpath. Firstly i tried right click on the project Maven>Update Projectbut still not worked. Then I execute mvn eclipse:eclipseinside the root directory and then after successful build i refreshed project in the eclipse. This time it worked.
我意识到 eclipse 以某种方式无法将此依赖项添加到我的类路径中。首先，我尝试右键单击该项目，Maven>Update Project但仍然无效。然后我mvn eclipse:eclipse在根目录中执行，然后在成功构建后我刷新了 eclipse 中的项目。这次成功了。
