时间戳实现乐观锁

Person.java

package cn.lxl.pojo;

public class Person {
	private Integer id;
	private String username;
	private String password;
	//设置一个属性，时间戳实现乐观锁
	//不提供 setter和 getter方法
	private java.sql.Timestamp updateTime;
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	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;
	}
}

 

Person.hbm.xml

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
	"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
	"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>		
	<class name="cn.lxl.pojo.Person" table="t_Person">
		<id name="id">
			<generator class="increment"></generator>
		</id>
		<timestamp  name="updateTime" column="update_time" access="field" ></timestamp>
		<property name="username">
			<column name="username"></column>
		</property>
		<property name="password">
			<column name="password"></column>
		</property>
	</class>
</hibernate-mapping>