Hibernate中的乐观锁

Product类

public class Product {


private String proid;
private String name;
private int num;
private int version;
public int getVersion() {
return version;
}
public void setVersion(int version) {
this.version = version;
}
public String getProid() {
return proid;
}
public void setProid(String proid) {
this.proid = proid;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getNum() {
return num;
}
public void setNum(int num) {
this.num = num;
}
}

----------------------------------------------------------

Product.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 package="com.soft.gread1">
<class name="Product" table="t_product" optimistic-lock="version">
<id name="proid">
<generator class="assigned"></generator>

</id>

需要在该类中加入字段 version

<version name="version"></version>
<property name="name"></property>
<property name="num"></property>
</class>
</hibernate-mapping>