hibernate——批量增加，利用DML更新、删除

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hibernate——批量增加，利用DML更新、删除

package com.xueyoucto.xueyou;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.Transaction;import com.xueyoucto.util.HibernateUtil;/** * Hello world! * */public class App{    public static void main( String[] args )    {        System.out.println( "Hello World!" );        SessionFactory sf = HibernateUtil.getSessionFactory();        Session session = sf.openSession();        Transaction tx = session.beginTransaction();        //批量增加        /*for(int i=0;i<10000;i++){           User u = new User();            u.setName("xx" + i);            u.setAge(i);            u.setEmail("44@qq.com");            session.save(u);            if(i%20 == 0){                session.flush();                session.clear();            }        }*/        //批量修改        /*String hqlUpdate = "update User u set name = :newName";        int updateEntities = session.createQuery(hqlUpdate)                .setString("newName","hjljw")                .executeUpdate();        System.out.println(updateEntities);*/        //批量删除        /*String hqlDelete = "delete User";        int deleteEntities = session.createQuery(hqlDelete)                .executeUpdate();        System.out.println(deleteEntities);*/        tx.commit();        session.close();        sf.close();    }}

package com.xueyoucto.xueyou;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.GenerationType;import javax.persistence.Id;import javax.persistence.Table;@Entity@Table(name = "h4_user")public class User {    @Id    @GeneratedValue(strategy = GenerationType.IDENTITY)    private Integer id;    private String name;    private Integer age;    private String email;    public Integer getId() {        return id;    }    public void setId(Integer id) {        this.id = id;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public Integer getAge() {        return age;    }    public void setAge(Integer age) {        this.age = age;    }    public String getEmail() {        return email;    }    public void setEmail(String email) {        this.email = email;    }}

运行后，数据库中的内容如下：

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