spring import javax.persistence.column, javax.persistence.entity, javax.persistence.Id - 等等 - 无法解析

import javax.persistence.column, javax.persistence.entity, javax.persistence.Id - and so on - cannot be resolved

提问by Adrien Be

I am trying to follow this tutorial. Instead of starting by using the downloadable project I thought I'd start from a simple "spring MVC - Maven - eclipse" project I did before. This project was running fine.

我正在尝试按照本教程进行操作。我想我不是从使用可下载项目开始，而是从我之前做过的一个简单的“spring MVC - Maven - eclipse”项目开始。这个项目运行良好。

So, as indicated in that tutorial, I started creating the packages. Then, I created my first class called Contact.javathat contains various annotations. See the class below.

因此，如该教程中所述，我开始创建包。然后，我创建了第一个名为的类Contact.java，其中包含各种注释。请参阅下面的类。

package sphbmveclp.contact.form;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="CONTACTS")
public class Contact {

    @Id
    @Column(name="ID")
    @GeneratedValue
    private Integer id;

    @Column(name="FIRSTNAME")
    private String firstname;

    @Column(name="LASTNAME")
    private String lastname;

    @Column(name="EMAIL")
    private String email;

    @Column(name="TELEPHONE")
    private String telephone;

    public String getEmail() {
        return email;
    }
    public String getTelephone() {
        return telephone;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public void setTelephone(String telephone) {
        this.telephone = telephone;
    }
    public String getFirstname() {
        return firstname;
    }
    public String getLastname() {
        return lastname;
    }
    public void setFirstname(String firstname) {
        this.firstname = firstname;
    }
    public void setLastname(String lastname) {
        this.lastname = lastname;
    }
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
}

I added the following dependency thinking it'd do the job as these annotations are "standard JPA annotations"

我添加了以下依赖项，认为它可以完成这项工作，因为这些注释是“标准 JPA 注释”

<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>servlet-api</artifactId>
    <version>2.5</version>
</dependency>

However, eclipse says

但是，eclipse 说

The import javax.persistence.Column cannot be resolved" for the first import.
The import javax.persistence.Entity cannot be resolved" for the second import.

and so on.

等等。

Here is the list of dependencies defined in my pom.xml:

这是 my 中定义的依赖项列表pom.xml：

  <properties>
        <org.springframework.version>3.0.5.RELEASE</org.springframework.version>
        <javax.servlet.jstl.version>1.2</javax.servlet.jstl.version>
    </properties>

  <dependencies>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
        </dependency>

       <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${org.springframework.version}</version>
       </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${org.springframework.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${org.springframework.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${org.springframework.version}</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>${javax.servlet.jstl.version}</version>
        </dependency>

       <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.16</version>
        </dependency>

       <dependency>
         <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.8.1</version>
        <scope>test</scope>
       </dependency>
  </dependencies>

回答by Adrien Be

This fixed my issue:

这解决了我的问题：

    <dependency>
        <groupId>org.hibernate.javax.persistence</groupId>
        <artifactId>hibernate-jpa-2.0-api</artifactId>
        <version>1.0.1.Final</version>
    </dependency>

Not exactly sure why I need it whereas it is not mentioned in the tutorial at all.

不完全确定为什么我需要它，而教程中根本没有提到它。