其次,由于要测试输出查询的内容,需要在持久类中覆写全参的toString()方法.
持久类的变动就这些.
package hiber1;
public class User {
private int uid;
private String username;
private String password;
private String address;
public int getUid() {
return uid;
}
public void setUid(int uid) {
this.uid = uid;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
@Override
public String toString() {
return "User [uid=" + uid + ", username=" + username + ", password=" + password + ", address=" + address + "]";
}
}
其次,创建一个新的测试类,此类需要从工厂类中获得session
package hiber1;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.junit.jupiter.api.Test;
public class HiberGet {
@Test
public void testGet(){
//1.调用工具类(session的工厂类),得到sessionfactory
SessionFactory sessionF = HiberTool.getSessionFactory();
//2.获取session
Session session = sessionF.openSession();
//3.开启事务
Transaction tx = session.beginTransaction();
//4.根据id查询,获取User对象(重点)
User user = session.get(User.class, 2);//第一个参数:实体类.class||第二个参数:id值
System.out.println(user);//直接输出user记得要在User类中重写toString
//5.提交事务
tx.commit();
//6.关闭
session.close();
sessionF.close();
}
}
其余内容就不粘贴了,记得要在xml映射文件中写清楚要获取的数据表名称
最后,输出的内容如下:
