Second, because you want to test the content of the output query, you need to Override the full-parameter toString() method in the
persistent class. That's all for the changes in the persistent class.
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 + "]";
}
}
Second, create a new test class, this class needs to get the session from the factory class
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. Call the tool class (the factory class of the session) and get the sessionfactory
SessionFactory sessionF = HiberTool.getSessionFactory();
//2. Get session
Session session = sessionF.openSession();
//3. Open the transaction
Transaction tx = session.beginTransaction();
//4. According to the id query, get the User object (emphasis)
User user = session.get(User.class, 2);//The first parameter: entity class.class||The second parameter: id value
System.out.println(user);//Direct output of user remember to rewrite toString in User class
//5. Commit the transaction
tx.commit();
//6. Close
session.close();
sessionF.close();
}
}
The rest of the content will not be pasted. Remember to clearly write the name of the data table to be obtained in the xml mapping file.
Finally , the output content is as follows:
