JJCEA — Fri, 21 Sep 2012 09:19:00 GMT

针对上面的角色�h员表如何用hibernate实现映射关系呢，因�ؓ此表中的两个字段是其它两表中主键�Q�在本表中即使是主键又是外键�Q�下面说明一下操作这张表�?br />�W�一步：首先生成员工信息表和角色��理表的javaBean�?hbm.xml文�g�Q�这个是单表�Q�这里不多讲�Q?br />            com.insigma.hr.eduj.ygxx.model.Ygxx.java�Q?br />            com.insigma.hr.eduj.ygxx.model.Ygxx.hbm.xml
            com.insigma.hr.eduj.jsgl.model.Jsgl.java,
            com.insigma.hr.eduj.jsgl.model.Jsgl.hbm.xml
            保证员工信息表和角色��理表能正常操作数据库（增，修，删，查）�Q?br />�W�二步：生成角色人员表对应的映射文�g如下�Q?br />            1).Jsry.hbm.xml文�g内容如下�Q?div style="padding: 4px 5px 4px 4px; border: 1px solid rgb(204, 204, 204); width: 98%; font-size: 13px; word-break: break-all; background-color: rgb(238, 238, 238);">xml version="1.0" encoding="utf-8"?>
DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
    <class name="com.insigma.hr.eduj.jsry.model.Jsry" table="jsry" catalog="hr">
        <composite-id name="id" class="com.insigma.hr.eduj.jsry.model.JsryId">
            <key-many-to-one name="jsgl" class="com.insigma.hr.eduj.jsgl.model.Jsgl">
                <column name="JSBH" />
            key-many-to-one>
            <key-many-to-one name="ygxx" class="com.insigma.hr.eduj.ygxx.model.Ygxx">
                <column name="YGBH" length="20" />
            key-many-to-one>
        composite-id>
    class>
hibernate-mapping>
   2).JsryId.java�q�个javabean中存放了两个属性分别对应员工信息和角色��理表的javabean对象�Q�内容如下：

public class JsryId  implements java.io.Serializable {
    private Jsgl jsgl;
    private Ygxx ygxx;
    public Jsgl getJsgl() {
        return jsgl;
    }
    public void setJsgl(Jsgl jsgl) {
        this.jsgl = jsgl;
    }
    public Ygxx getYgxx() {
        return ygxx;
    }
    public void setYgxx(Ygxx ygxx) {
        this.ygxx = ygxx;
    }
}

3�Q?Jsry.java�q�个javabean中只有一个属性，��是我们上面刚才新徏的JsryId�q�个�c�d��象；内容如下�Q?br />

public class Jsry implements java.io.Serializable {

// Constructors
private JsryId id;

/** default constructor */
public Jsry() {
}

/** full constructor */
public Jsry(JsryId id) {
this.id = id;
}

public JsryId getId() {
return id;
}

public void setId(JsryId id) {
this.id = id;
}
}

�W�三步：dao中方法如下：

public void save(Jsry jsry) {
  log.debug("saving Jsry instance");
  try {
   getHibernateTemplate().saveOrUpdate(jsry);
   log.debug("save successful");
  } catch (RuntimeException re) {
   log.error("save failed", re);
   throw re;
  }
}

public void delete(Jsry jsry) {
  log.debug("deleting Jsry instance");
  try {
   getHibernateTemplate().delete(jsry);
   log.debug("delete successful");
  } catch (RuntimeException re) {
   log.error("delete failed", re);
   throw re;
  }
}

public Jsry findById(com.insigma.hr.eduj.jsry.model.JsryId id) {
  log.debug("getting Jsry instance with id: " + id);
  try {
   Jsry instance = (Jsry) getHibernateTemplate().get(
     "com.insigma.hr.eduj.jsry.model.Jsry", id);
   return instance;
  } catch (RuntimeException re) {
   log.error("get failed", re);
   throw re;
  }
}

public List getJsgllist(String sql) {
  String sqls = "select t.* from Jsgl t where 1=1 " + sql;
  SQLQuery query = getHibernateTemplate().getSessionFactory()
    .getCurrentSession().createSQLQuery(sqls);
  query.addEntity("t", Jsry.class);
  List topList = query.list();
  return topList;
}

�W�四步：��试

public static void main(String[] args) {
  // TODO Auto-generated method stub
   ApplicationContext appContext = new FileSystemXmlApplicationContext("/src/applicationContext.xml");
      JsryService jsryService=(JsryService) appContext.getBean("jsryService");

  Jsry jsry = new Jsry();
  JsryId id = new JsryId();
  Jsgl jsgl = new Jsgl();
  jsgl.setJsbh(1);

  Ygxx ygxx = new Ygxx();
  ygxx.setYgbh("1");
  id.setYgxx(ygxx);
  id.setJsgl(jsgl);

  jsry.setId(id);
  jsryService.save(jsry);
}

JJCEA 2012-09-21 17:19 发表评论

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