1.定义MyHibernateDaoSupport 扩展HibernateSupport
mport java.sql.SQLException;
import java.util.List;import org.hibernate.HibernateException;
import org.hibernate.Query;import org.hibernate.Session;import org.springframework.orm.hibernate3.HibernateCallback;import org.springframework.orm.hibernate3.support.HibernateDaoSupport;public class MyHibernateDaoSupport extends HibernateDaoSupport {
public List findByPage(final String hql,final int offset,final int pageSize) { List list=this.getHibernateTemplate().executeFind(new HibernateCallback() { public Object doInHibernate(Session session) throws HibernateException, SQLException { List result=session.createQuery(hql).setFirstResult(offset).setMaxResults(pageSize).list(); return result; } } ); return list; } public List findByPage(final String hql,final String value,final int offset,final int pageSize) { List list=this.getHibernateTemplate().executeFind(new HibernateCallback() { public Object doInHibernate(Session session) throws HibernateException, SQLException { List result=session.createQuery(hql).setParameter(0,value).setFirstResult(offset).setMaxResults(pageSize).list(); return result; } } ); return list; } public List findByPage(final String hql,final Object[] values,final int offset,final int pageSize){ List list=this.getHibernateTemplate().executeFind(new HibernateCallback() { public Object doInHibernate(Session session) throws HibernateException, SQLException { Query query=session.createQuery(hql); for(int i=0;i<values.length;i++) { query.setParameter(i,values[i]); } List result=query.setFirstResult(offset).setMaxResults(pageSize).list(); return result; } } ); return list; }}2.定义要分页的实体的Dao接口如：public interface StudentDao { Student get(int id); void save(Student student); void update(Student student); void delete(int id); void delete(Student student); List<Student> findAll(); List<Student> findAllByPage(int pageNo,int pageSize); int getStudentCount(); List<Student> findStudentByNameAndNumber(String stuName,String stuNumber);}3.定义实现类主要写出两个分页中要用到的方法public List<Student> findAllByPage(int pageNo, int pageSize) { if(pageNo<1){ return null; } int offset=(pageNo-1)*pageSize; return findByPage("from Student", offset, pageSize); } public int getStudentCount() { List<Student> listStudent=this.getHibernateTemplate().find("from Student"); return listStudent.size(); }4.定义Service接口public interface ExamService { int STUDENT_PAGE_SIZE=3; int QUESTION_PAGE_SIZE=3; int addStudent(String stuNumber,String name,String className,String humanId,String email,String address,String phone) throws Exception; void deleteStudent(int id) throws Exception; List<Student> listStudent(int pageNo) throws Exception; int addQuestion(String quTitle,String quHard,String quScore,String quAnswer,String quType,String selectOption,int typeid) throws Exception; void deleteQuestion(int id) throws Exception; List<Question> listQuestion(int pageNo) throws Exception; void deleteExamtype(int typeid) throws Exception; int addExamtype(String textName,String testTime)throws Exception; List<Examtype> getAllExamtype()throws Exception; boolean adminLogin(String admName,String admPwd)throws Exception; int getStudentCount()throws Exception; int getQuestionCount()throws Exception; int getPageCount(int count,int pageSize); String studentLogin(String stuName,String stuNumber)throws Exception; Question getNextQuestion(List<Integer> alreadys,int typeid)throws Exception; Question getQuestionById(int id)throws Exception; String getExamtypeName(int typeid)throws Exception;;}5.定义实现类public int getPageCount(int count, int pageSize) { return (count+pageSize-1)/pageSize; }public int getStudentCount() throws Exception { return studentDao.getStudentCount(); }
public List<Student> listStudent(int pageNo) throws Exception {
return studentDao.findAllByPage(pageNo, STUDENT_PAGE_SIZE);
}
6.ListStudentAction.java
int studentCount=examService.getStudentCount(); ActionMessages errors=new ActionMessages(); if(studentCount<1) { errors.add("studentCount",new ActionMessage("studentCount.null")); mapping.findForward("success"); } int pageCount=examService.getPageCount(studentCount,examService.STUDENT_PAGE_SIZE); int pageNo; if(request.getParameter("pageNo")==null || request.getParameter("pageNo").trim().equals("")) { pageNo=1; } try { pageNo=Integer.parseInt(request.getParameter("pageNo").trim()); } catch (Exception e) { pageNo=1; } if(pageNo>pageCount){ pageNo=pageCount; } request.setAttribute("pageCount",pageCount); request.setAttribute("currentPage",pageNo); request.setAttribute("studentList", examService.listStudent(pageNo)); return mapping.findForward("success");7.listStudent.jsp<table cellspacing="0" cellpadding="0" border="1" width="700">
<tr> <th> <bean:message key="student.shenfenzheng" /> </th> <th> <bean:message key="student.mingzi" /> </th> <th> <bean:message key="student.banji" /> </th> <th> <bean:message key="student.xuehao" /> </th> <th> <bean:message key="student.youjian" /> </th> <th> <bean:message key="student.dianhua" /> </th> <th> <bean:message key="student.address" /> </th> <th> <bean:message key="student.isdelete" /> </th> </tr> <c:forEach items="${requestScope.studentList}" var="students"> <tr> <td align="center"> ${students.humanId} </td> <td align="center"> ${students.stuName} </td> <td align="center"> ${students.stuClassName} </td> <td align="center"> ${students.stuNumber} </td> <td align="center"> ${students.email} </td> <td align="center"> ${students.phone} </td> <td align="center"> ${students.address} </td> <td align="center"> <a href="deleteStudent.do?delStuid=${students.id}" οnclick='return confirm("<bean:message key="confirm.del.student"/>");' target="center"><bean:message key="student.delete" /> </a> </td> </tr> </c:forEach> <br /> <tr> <td colspan="7" align="center"> 第${requestScope.currentPage}页 共${requestScope.pageCount}页 <a href="listStudent.do?pageNo=1">首页</a> <logic:greaterThan value="1" name="currentPage" scope="request"> <a href="listStudent.do?pageNo=${requestScope.currentPage-1}"> </logic:greaterThan> 上一页 <logic:greaterThan value="1" name="currentPage" scope="request"> </a> </logic:greaterThan><logic:lessThan value="${requestScope.pageCount}" name="currentPage"
scope="request"> <a href="listStudent.do?pageNo=${requestScope.currentPage+1}"> </logic:lessThan> 下一页 <logic:lessThan value="${requestScope.pageCount}" name="currentPage" scope="request"> </a> </logic:lessThan> <a href="listStudent.do?pageNo=${requestScope.pageCount}">尾页</a> </td> </tr> </table>