Hibernate3.3 小记

//----------------事务（修改、删除、保存）
Session s=getSession();
Transaction t=s.beginTransaction();
getSession().delete(persistentInstance);
t.commit();
//查询语句
public List<Cls> i = new ArrayList<Cls>();
	public String execute(){
		ClsDAO clsDAO = new ClsDAO();
		i=clsDAO.findAll();
		return "1";
		
	}
//删除语句
StuDAO  In=new StuDAO();
i=In.findstuid(stu_id);
In.delete(i.get(0));
//添加语句
	public String stu_name;
	public Integer stu_age;
	public Integer cls_id;
	public String execute(){
		ClsDAO clsDAO = new ClsDAO();
		Cls cls = clsDAO.findById(cls_id);
		StuDAO stuDAO = new StuDAO();
		Stu stu = new Stu(cls,stu_name,stu_age);
		stuDAO.save(stu);
		return "1";
	}
//修改语句
	public String stu_name;
	public Integer stu_age;
	public Integer cls_id;
	public Integer stu_id;
	public String execute(){
		ClsDAO clsDAO=new ClsDAO();
		Cls cls=clsDAO.findById(cls_id);
		Stu stu=new Stu(cls,stu_name,stu_age,stu_id);//自己写个参数包含主键ID的构造函数
		StuDAO studentsDAO=new StuDAO();
		studentsDAO.merge(stu);
		return "1";	
	}
//DAO里面学生表按照班级ID查询
	public List findClsid(Integer cls_id) {
			String queryString = "from Stu where cls_id = ‘"+cls_id+"‘";
			Query queryObject = getSession().createQuery(queryString);
			return queryObject.list();
	}
//JS 方式 伪网页直接访问action，用于无触发情况下，需要调用后台访问数据库取得实时数据的做法
<script type="text/javascript">
	window.location.href="all.action";
</script>

//S标签，遍历List数组，生成表格等数据表
<%@ taglib prefix="s" uri="/struts-tags"%>
<s:iterator value="i">
<s:property value="stuId"/>
</s:iterator>

//struts2 
<constant name="struts.i18n.encoding" value="utf-8" />
	<package name="denglu" extends=" struts-default">
		<action name="all" class="com.all">
			<result name="1">/all.jsp</result>
		</action>
   　　　　　　　<action name="up_save" class="com.up_save">
			<result name="1" type="redirectAction">all</result>
		</action>
	</package>

a标签返回上一步
<a href="javascript:history.go(-1)">返回</a>

<script type="text/javascript">
      function myCheck()
      {
         for(var i=0;i<document.form1.elements.length-1;i++)
         {
          if(document.form1.elements[i].value=="")
          {
          document.getElementById("showResult").innerHTML="请输入学生完整信息！";
          document.form1.elements[i].focus();
          return false;
          }
         }
         return true;
      }
    </script>

<form name="form1" action="add.action" method="post" onSubmit="return myCheck()"></form>
<span id="showResult" style="color: red;"></span>