Java Code Bytes

Parent Child Relationship – Hibernate

Inserting values in both parent and child table in Hibernate in a single command. You need not insert value in the parent table first and then get the ID and set it in the child and then insert it. You can do both at the same time. Below are the sample code snippets of the files used.

hbm.xml file:

<class name="com.sample.pojos.UserInfoBean" table="USER_INFO" lazy="false">

    ... other properties configured
<property name="firstName" type="java.lang.String" column="FIRST_NAME" />
<property name="lastName" type="java.lang.String" column="LAST_NAME" />
    <bag cascade="all-delete-orphan" inverse="true" lazy="true" name="userDetailsBean" table="USER_DETAILS">
        <key column="USER_INFO_ID"/>
        <one-to-many class="com.sample.pojos.UserDetailsBean"/>

<class name="com.sample.pojos.UserDetailsBean" table="USER_DETAILS" lazy="false">

    ... other properties configured
<property name="address" type="java.lang.String" column="ADDRESS" />
<property name="city" type="java.lang.String" column="CITY" />
    <many-to-one cascade="none" class="com.sample.pojos.UserInfoBean" column="USER_INFO_ID" insert="true" name="userInfoBean" outer-join="false" update="true"/>

private List userDetailsBean;

... other properties

 * @return Returns the userDetailsBean.
public List getUserDetailsBean() {
    return userDetailsBean;

 * @param userDetailsBean The userDetailsBean to set.
public void setUserDetailsBean(List userDetailsBean) {
    this.userDetailsBean = userDetailsBean;

... getters and setters for other properties

private UserInfoBean userInfoBean;

... other properties

 * @return Returns the userInfoBean.
public UserInfoBean getUserInfoBean() {
    return userInfoBean;

 * @param userInfoBean The userInfoBean to set.
public void setUserInfoBean(UserInfoBean userInfoBean) {
    this.userInfoBean = userInfoBean;

... getters and setters for other properties

Business class:

Transaction transaction = null;

UserInfoBean userInfoBean = new UserInfoBean();

... set the required properties

UserDetailsBean userDetailsBean = new UserDetailsBean();

... set the required properties

// Setting the parent class in the child class

// List for storing the User Details Beans
List userDetailsList = new ArrayList();

// Adding the UserDetailsBean to the list

// Setting the list in the UserInfoBean

try {
    Session session = SessionManager.currentSession();           
    transaction = session.beginTransaction();      ;           
    createUserStatus = true;
} catch (Exception e) {
} finally {

Now in a single command, values gets inserted in both the parent and child table.

Hope this helps.


According to the basics of Java, its not possible to access method that are marked as private outside the class.

But thats not the case. We can access it outside the class by using “java.lang.reflect” and the “setAccessible” method of the “Method” class.

Here is a code snippet on how to use it. (more…)

Hi friends. I used this program to send mails via JavaMail API. Thought it could be useful.

I have put system.out.println just for verification. U can remove those if u want.