Hibernate batch update and batch deletion

Modification of the batch:

Scene: If there is a student table student, an existing attribute [college] renamed, from "Computer College" to "Computer Engineering" [does not consider the college table].

A DML (data manipulation language) operation is implemented using Hibernate to implement this batch update method. The code is as follows:

public void updateUser(String newName,String oldName) {
　Session session = null;
　try{
　session = this.getSession();
　Transaction tc = session.beginTransaction();

　String hqlUpdate = "update Student set deptName=:newName where　　 deptName= :oldName";
int updatedEntities = s.createQuery( hqlUpdate )
.setString( "newName", newName )
.setString( "oldName", oldName )
.executeUpdate();

　tc.commit();
　}catch(RuntimeException re){
　log.debug(re.getMessage(),re);
　throw re;
　}finally{
　if (session != null){
　　session.close();
　}
　}
}

Method Two bypasses the Hibernate API, implemented with JDBC.

public void UpdateUser(String newName,String oldName) {
　Session session = null;
　try{
　session = this.getSession();
　Transaction tc = session.beginTransaction();

　Connection connection = session.connection();

　PreparedStatement ps = connection.prepareStatement("update Student set deptName='"+newName+"' where　deptName= '"+oldName+"'");

　ps.execute();

　tc.commit();

　}catch(RuntimeException re){
　log.debug(re.getMessage(),re);
　throw re;
　}catch(SQLException e){
　log.debug(e.getMessage(),e);
　}finally{
　if (session != null){
　　session.close();
　}
　}
}