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目录
环境要求
导入好Hibernate相关jar包，
并且对每一个表都生成了POJO类！
增加数据库记录
表结构如下：
这里使用Hibernate生成的POJO类如下：
Student.java
package my.db;
import java.util.Date;
/**
* Student entity. @author MyEclipse Persistence Tools
*/
public class Student implements java.io.Serializable {
// Fields
private Integer id;
private String name;
private String phone;
private Date birthday;
// Constructors
/** default constructor */
public Student() {
}
/** full constructor */
public Student(Integer id, String name, String phone, Date birthday) {
this.id = id;
this.name = name;
this.phone = phone;
this.birthday = birthday;
}
// Property accessors
public Integer getId() {
return this.id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
public String getPhone() {
return this.phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public Date getBirthday() {
return this.birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
}Example.java
package my.db;
/**
* Example entity. @author MyEclipse Persistence Tools
*/
public class Example implements java.io.Serializable {
// Fields
private Long id;
private String author;
private String title;
// Constructors
/** default constructor */
public Example() {
}
/** full constructor */
public Example(String author, String title) {
this.author = author;
this.title = title;
}
// Property accessors
public Long getId() {
return this.id;
}
public void setId(Long id) {
this.id = id;
}
public String getAuthor() {
return this.author;
}
public void setAuthor(String author) {
this.author = author;
}
public String getTitle() {
return this.title;
}
public void setTitle(String title) {
this.title = title;
}
}关键的添加数据如下：
Test.java
package my.db;
import java.text.SimpleDateFormat;
import org.hibernate.Session;
import org.hibernate.Transaction;
public class Test {
/**
* @param args
*/
public static void main(String[] args) {
Session dbss = null;
try
{
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-mm-dd");
Student row = new Student();
row.setId(201602);
row.setName("小明");
row.setPhone("18888888888");
row.setBirthday(sdf.parse("1888-8-8"));
Example re = new Example();
re.setAuthor("小明");
re.setTitle("装逼指南");
/*连接数据库*/
dbss = HibernateSessionFactory.getSession();
Transaction dbtr = dbss.beginTransaction();
dbss.save(row);
dbss.save(re);
dbtr.commit();
System.out.println("数据库生成的小明的ID " + re.getId());
System.out.println("测试成功！");
}
catch(Exception e)
{
System.out.println("出错: " + e.getMessage());
e.printStackTrace();
}
finally
{
if(dbss!= null) dbss.close();
}
}
}
运行截图如下：
表内容如下：
查询数据
查询数据有3种分别是：
test1：按主键查询
test2：HQL查询 (Hibernate Query Language)
test3：Native SQL 查询
源码如下：
package my.db;
import java.util.List;
import org.hibernate.Session;
import org.hibernate.Transaction;
public class Test {
public static void test1(){
Session dbss = null;
try{
//连接数据库
dbss = HibernateSessionFactory.getSession();
Integer rowid = new Integer(201602);
Student row = (Student)dbss.get(Student.class, rowid);
if(row == null){
System.out.println("找不到记录！");
}
else{
System.out.println("姓名:" + row.getName() + ",电话:" + row.getPhone());
}
}
catch(Exception e){
System.out.println("出错：" + e.getMessage());
e.printStackTrace();
}
finally{
if(dbss != null)
dbss.close();
}
}
public static void test2(){
Session dbss = null;
try{
//连接数据库
dbss = HibernateSessionFactory.getSession();
String hql = "from my.db.Student where id > 201601";
List<Student> results = dbss.createQuery(hql).list();
if(results.size() == 0){
System.out.println("找不到记录！");
}
else{
for(Student row: results){
System.out.println("姓名:" + row.getName() + ",电话:" + row.getPhone());
}
}
}
catch(Exception e){
System.out.println("出错: " + e.getMessage());
e.printStackTrace();
}
finally{
if(dbss != null)
dbss.close();
}
}
public static void test3(){
Session dbss = null;
try{
dbss = HibernateSessionFactory.getSession();
String sql = "SELECT * FROM testwebdb.student";
List<Object[]> results = dbss.createSQLQuery(sql).list();
for(Object[] row : results){
Integer id = Integer.valueOf( row[0].toString() );
String name = row[1].toString();
String phone = row[2].toString();
String brithday = row[3].toString(); //
System.out.println("学号" + id + "姓名:" + name + ",电话:" + phone + ",生日" + brithday);
}
}
catch(Exception e){
System.out.println("出错: " + e.getMessage());
e.printStackTrace();
}
finally{
if (dbss != null)
dbss.close();
}
}
public static void main(String[] args) {
//test1();
//test2();
//test3();
}
}
修改数据库记录
修改数据有3种分别是：
test1：按主键查询
test2：HQL查询 (Hibernate Query Language)
test3：Native SQL 查询
源码如下：
package my.db;
import java.util.List;
import org.hibernate.Session;
import org.hibernate.Transaction;
public class Test {
public static void test1(){
Session dbss = null;
try{
dbss = HibernateSessionFactory.getSession();
Integer rowid = new Integer(201602);
Student row = (Student)dbss.get(Student.class, rowid);
if(row != null){
row.setPhone("16666666666");
//保存到数据
Transaction dbtr = dbss.beginTransaction();
dbss.update(row);
dbtr.commit();
}
}
catch(Exception e){
System.out.println("出错: " + e.getMessage());
e.printStackTrace();
}
finally{
if(dbss != null)
dbss.close();
}
}
public static void test2(){
Session dbss = null;
try{
dbss = HibernateSessionFactory.getSession();
Transaction dbtr = dbss.beginTransaction();
String hql = "UPDATE Student SET phone='12233330000' WHERE id='201602'";
int rowsAffected = dbss.createQuery(hql).executeUpdate();
System.out.print(rowsAffected + " rows affected.");
dbtr.commit();
}
catch(Exception e){
System.out.println("出错: " + e.getMessage());
e.printStackTrace();
}
finally{
if(dbss != null)
dbss.close();
}
}
public static void test3(){
Session dbss = null;
try{
/* 连接数据库 */
dbss = HibernateSessionFactory.getSession();
// 构造一个普通的SQL语句
Transaction dbtr = dbss.beginTransaction();
String sql = "UPDATE student SET `phone`='13355550000' WHERE id='201601' ";
int rowsAffected = dbss.createSQLQuery(sql).executeUpdate();
System.out.println(rowsAffected + " rows affected.");
}
catch(Exception e){
System.out.println("出错: " + e.getMessage());
e.printStackTrace();
}
finally{
if(dbss != null)
dbss.close();
}
}
public static void main(String[] args) {
//test1();
//test2();
test3();
}
}
删除数据库记录
删除数据有3种分别是：
test1：按主键查询
test2：HQL查询 (Hibernate Query Language)
test3：Native SQL 查询
源码如下：
package my.db;
import java.util.List;
import org.hibernate.Session;
import org.hibernate.Transaction;
public class Test {
public static void test1(){
Session dbss = null;
try{
dbss = HibernateSessionFactory.getSession();
Integer rowid = new Integer(201601);
Student row = (Student)dbss.get(Student.class, rowid);
if(row != null){
Transaction dbtr = dbss.beginTransaction();
dbss.delete(row);
dbtr.commit();
}
}
catch(Exception e){
System.out.println("出错: " + e.getMessage());
e.printStackTrace();
}
finally{
if(dbss != null)
dbss.close();
}
}
public static void test2(){
Session dbss = null;
try{
dbss = HibernateSessionFactory.getSession();
Transaction dbtr = dbss.beginTransaction();
String hql = "delete from Student where id='201602' ";
int rowsAffected = dbss.createQuery(hql).executeUpdate();
System.out.println(rowsAffected + " rows affected.");
dbtr.commit();
}
catch(Exception e){
System.out.println("出错: " + e.getMessage());
e.printStackTrace();
}
finally{
if(dbss != null)
dbss.close();
}
}
public static void test3(){
Session dbss = null;
try{
/* 连接数据库 */
dbss = HibernateSessionFactory.getSession();
// 构造一个普通的SQL语句
Transaction dbtr = dbss.beginTransaction();
String sql = "DELETE FROM `student` WHERE id='201603' ";
int rowsAffected = dbss.createSQLQuery(sql).executeUpdate();
System.out.println(rowsAffected + " rows affected.");
dbtr.commit();
}
catch(Exception e){
System.out.println("出错: " + e.getMessage());
e.printStackTrace();
}
finally{
if(dbss != null)
dbss.close();
}
}
public static void main(String[] args) {
//test1();
//test2();
test3();
}
}