hibernate一对多双向级联删除_hibernate 注解一对多级联删除-优快云博客

本文介绍了使用Hibernate进行对象关系映射（ORM）的具体实践，包括Operator和Roleinfo两个类的属性定义及其与数据库表之间的映射关系。此外，还探讨了如何通过Hibernate API删除具有相关联操作员的角色。

package pojo;
public class Operator {
private int id;
private String name;
private String password;
private Roleinfo role;
private int pid;
private int rootId;
private String createIp;
private String createtime;
private String updateTime;
private String MessageCenterType;
private String status;
private String local;
public String getLocal() {
  return local;
}
public void setLocal(String local) {
  this.local = local;
}
public String getStatus() {
  return status;
}
public void setStatus(String status) {
  this.status = status;
}
public String getCreateIp() {
  return createIp;
}
public void setCreateIp(String createIp) {
  this.createIp = createIp;
}

public String getMessageCenterType() {
  return MessageCenterType;
}
public void setMessageCenterType(String messageCenterType) {
  MessageCenterType = messageCenterType;
}
public String getName() {
  return name;
}
public void setName(String name) {
  this.name = name;
}
public String getPassword() {
  return password;
}
public void setPassword(String password) {
  this.password = password;
}

public int getId() {
  return id;
}
public void setId(int id) {
  this.id = id;
}
public int getPid() {
  return pid;
}
public void setPid(int pid) {
  this.pid = pid;
}

public Roleinfo getRole() {
  return role;
}
public void setRole(Roleinfo role) {
  this.role = role;
}
public int getRootId() {
  return rootId;
}
public void setRootId(int rootId) {
  this.rootId = rootId;
}
public String getCreatetime() {
  return createtime;
}
public void setCreatetime(String createtime) {
  this.createtime = createtime;
}
public String getUpdateTime() {
  return updateTime;
}
public void setUpdateTime(String updateTime) {
  this.updateTime = updateTime;
}

}

<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
<class
    name="pojo.Operator"
    table="operatorinfo"
    lazy="false"
>
    <id
        name="id"
        type="integer"
        column="OperatorId"
        length="10"
    >
    <generator class="increment"></generator>
    </id>

    <property
        name="name"
        type="string"
        column="operatorName"
        length="20"
    />
    <property
        name="password"
        type="string"
        column="password"
        length="20"
    />
    <property
        name="createtime"
        type="string"
        column="createtime"
        length="50"
    />
    <property
        name="updateTime"
        type="string"
        column="UpdateTime"
        length="50"
    />
    <property
        name="local"
        type="string"
        column="local"
        length="100"
    />
<property name="pid"
column="pid"
type="integer"
length="10">
</property>

<property name="rootId"
column="rootId"
type="integer"
length="10">
</property>

<property name="MessageCenterType"
column="MessageCenterType"
type="string"
length="20">
</property>
<property name="status"
column="status"
type="string"
length="4">
</property>
<property name="createIp"
column="CreateIP"
type="string"
length="100">
</property>

<many-to-one name="role"
column="roleId"

  cascade="all"
class="pojo.Roleinfo"

>

</many-to-one>

</class>
</hibernate-mapping>

package pojo;

import java.util.Set;

public class Roleinfo {
private int id;
private String roleName;
private String roleDesc;
private Set<Module> modules;
private Set<Operator> operators;
public Set<Operator> getOperators() {
  return operators;
}
public void setOperators(Set<Operator> operators) {
  this.operators = operators;
}
public Set<Module> getModules() {
  return modules;
}
public void setModules(Set<Module> modules) {
  this.modules = modules;
}
public String getRoleDesc() {
  return roleDesc;
}
public void setRoleDesc(String roleDesc) {
  this.roleDesc = roleDesc;
}
public String getRoleName() {
  return roleName;
}
public void setRoleName(String roleName) {
  this.roleName = roleName;
}
public int getId() {
  return id;
}
public void setId(int id) {
  this.id = id;
}

}

<?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="pojo.Roleinfo"
    table="roleinfo"
    lazy="false"
    dynamic-insert="true"
    dynamic-update="true"
>
    <id
        name="id"
        type="integer"
        column="roleid"
        length="10"
        unsaved-value="0"
    >
        <generator class="increment" />
    </id>
    <property
        name="roleName"
        type="string"
        column="RoleName"
        length="20"
    />

    <property
        name="roleDesc"
        type="string"
        column="roleDesc"
        length="4000"
    />
<set name="modules"
table="role2module"
inverse="false"
   lazy="false"
    cascade="all">
<key column="roleId"></key>
<many-to-many class="pojo.Module"
column="moduleId" outer-join="auto">
</many-to-many>
</set>
<set name="operators"
table="operatorinfo"
inverse="true"
cascade="all"
lazy="false"
>
  <key column="RoleId"></key>
  <one-to-many
  class="pojo.Operator"
  />
</set>
</class>
</hibernate-mapping>

public String deleteRole(String[] ids) {
  String s = "0";
  Session session = super.getSession(true);
  try {
   for (int i = 0; i < ids.length; i++) {
    //session.delete(findById(Integer.parseInt(ids[i])));
    /**
     * session.get(Class class,int id)
     */
    Roleinfo role = (Roleinfo)session.get(Roleinfo.class, Integer.parseInt(ids[i]));
    Set<Operator> set = role.getOperators();
    for (Iterator iter = set.iterator(); iter.hasNext();) {
     Operator o = (Operator) iter.next();
     session.delete(o);
     role.getOperators().remove(o);
     role.getOperators().clear();
     //role.getOperators().remove(o);
    }

    //role.getOperators().clear();
    session.delete(role);

   }
   s = "1";
  } catch (Exception e) {

  }


  return s;
}