@MappedSuperclass的用法 _用法

【@MappedSuperclass的用法】但使书种多，会有岁稔时。这篇文章主要讲述@MappedSuperclass的用法相关的知识，希望能为你提供帮助。
1、定义实体类的父类

package com.rock.cft.hibernate; import java.util.Date; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.MappedSuperclass; //@MappedSuperclass 用在父类上面。当这个类肯定是父类时，加此标注。如果改成@Entity，则继承后，多个类继承，只会生成一个表，而不是多个继承，生成多个表 @MappedSuperclass public abstract class BaseEntity { private Integer id; // 数据库主键 private Date creationTime; //创建时间 private Date modificationTime; //修改时间 @Id @GeneratedValue(strategy = GenerationType.AUTO) public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public Date getCreationTime() { return creationTime; } public void setCreationTime(Date creationTime) { this.creationTime = creationTime; } public Date getModificationTime() { return modificationTime; } public void setModificationTime(Date modificationTime) { this.modificationTime = modificationTime; } }

2、实体类Test_No1.java

package com.rock.cft.test.model; import java.io.Serializable; import java.util.Date; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.Table; import com.rock.cft.hibernate.BaseEntity; @Entity @Table(name="test_no2") public class Test_No1 extends BaseEntity implements Serializable { private String name; private int age;
public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; }}

3、实体类Test_NO2.java

package com.rock.cft.test.model; import java.io.Serializable; import java.util.Date; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.Table; import com.rock.cft.hibernate.BaseEntity; @Entity @Table(name="test_no2") public class Test_NO2 extends BaseEntity implements Serializable { private Date testBri; private String testAdr; public Date getTestBri() { return testBri; } public void setTestBri(Date testBri) { this.testBri = testBri; } public String getTestAdr() { return testAdr; } public void setTestAdr(String testAdr) { this.testAdr = testAdr; }
}