<dependency>      <groupId>org.springframework.boot</groupId>      <artifactId>spring-boot-starter-jdbc</artifactId>    </dependency>    <!-- 數據庫驅動 -->    <dependency>      <groupId>com.oracle</groupId>      <artifactId>ojdbc6</artifactId>      <version>11.2.0.3</version>    </dependency>

<!-- 定義spring-boot-starter-data-jpa -->     <dependency>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-data-jpa</artifactId>  </dependency>

package cn.xdl.entity;import java.io.Serializable;import javax.persistence.Column;import javax.persistence.Entity;import javax.persistence.Id;import javax.persistence.Table;@Entity@Table(name="EMP") //通常和@Entity配合使用,只能標注在實體的class定義處,表示實體對應的數據庫表的信息public class Emp implements Serializable{  /**   *    */  private static final long serialVersionUID = 1L;  @Id //定義了映射到數據庫表的主鍵的屬性,一個實體只能有一個屬性被映射為主鍵置于getXxxx()前  @Column(name="EMPNO") //name表示表的名稱默認地,表名和實體名稱一致,只有在不一致的情況下才需要指定表名  private Integer empno;  @Column(name="ENAME")  private String ename;  @Column(name="JOB")  private String job;  @Column(name="MGR")  private int mgr;  public Integer getEmpno() {    return empno;  }  public void setEmpno(Integer empno) {    this.empno = empno;  }  public String getEname() {    return ename;  }  public void setEname(String ename) {    this.ename = ename;  }  public String getJob() {    return job;  }  public void setJob(String job) {    this.job = job;  }  public int getMgr() {    return mgr;  }  public void setMgr(int mgr) {    this.mgr = mgr;  }  @Override  public String toString() {    return "Emp [empno=" + empno + ", ename=" + ename + ", job=" + job + ", mgr=" + mgr + "]";  }}

package cn.xdl.jpa;import org.springframework.data.jpa.repository.JpaRepository;import cn.xdl.entity.Emp;//JpaRepository:JPA資源庫/** * 1.所有繼承該接口的都被spring所管理，改接口作為標識接口，功能就是用來控制domain模型的 * 2.Spring Data可以讓我們只定義接口，只要遵循spring data的規范,無需寫實現類。  * */public interface EmpDao extends JpaRepository<Emp, Integer>{}

@SpringBootApplicationpublic class MyBootApplication {  public static void main(String[] args) throws SQLException {    ApplicationContext ioc = SpringApplication.run(MyBootApplication.class, args);    // 自動配置創建DataSource，id名為dataSource    DataSource ds = ioc.getBean("dataSource", DataSource.class);    System.out.println(ds);    System.out.println("=================");    System.out.println("=================");    System.out.println("=================");    EmpDao empDao = ioc.getBean("empDao", EmpDao.class);    /**     * 遍歷     */    List<Emp> empdatas = empDao.findAll();    for (Emp emp : empdatas) {      System.out.println(emp);    }  }}