ssh三大框架增删改查，严格分层

package com.action; import java.util.List; import com.dao.ClassDao; import com.dao.StudentDao; import com.entity.SshClass; import com.entity.SshStudent; public class StudentAction extends BaseAction{ private StudentDao studentDao; private ClassDao classDao; private List<SshStudent> listStudent; private List<SshClass> listClass; //条件查询的提交值 private Integer sid;//这里用Integer因为int默认为0，会显示在页面中,Integer默认为null private String sname; private int cid; //分页 private int currentPage; private int pageSize=3; private int pageCount; private int rows; public void setCurrentPage(int currentPage) { this.currentPage = currentPage; } public void setSid(Integer sid) { this.sid = sid; } public void setSname(String sname) { this.sname = sname; } public void setCid(int cid) { this.cid = cid; } public List<SshStudent> getListStudent() { return listStudent; } public List<SshClass> getListClass() { return listClass; } public void setStudentDao(StudentDao studentDao) { this.studentDao = studentDao; } public void setClassDao(ClassDao classDao) { this.classDao = classDao; } //条件查询 public String execute(){ String hql = "from SshStudent where 1=1"; if(sid != null){ hql = hql+" and sid="+sid; } if(sname !="" && sname != null){ hql = hql+" and sname like '%"+sname+"%'"; } if(cid != -1 && cid != 0){ hql = hql +" and cid ="+cid; } String h = "select count(*) "+hql; rows = studentDao.getRows(h); if(currentPage == 0){ currentPage = 1; } if(rows%pageSize == 0){ pageCount = rows/pageSize; }else{ pageCount = rows/pageSize+1; } request.put("pageCount", pageCount); request.put("sid", sid); request.put("sname", sname); request.put("cid", cid); request.put("currentPage", currentPage); listStudent = studentDao.findAll(hql, currentPage, pageSize); listClass = classDao.findAll("from SshClass"); return SUCCESS; } //删除一个学生 public String delete(){ SshStudent stu = studentDao.findById(sid); studentDao.delete(stu); sid = null; return execute(); } //添加学生 public String add(){ listClass = classDao.findAll("from SshClass"); return "add"; } public String add1(){ SshClass c = classDao.findById(cid); SshStudent stu = new SshStudent(c, sname); studentDao.save(stu); sid = null; sname = ""; cid = -1; return execute(); } //修改学生 public String update(){ SshStudent stu = studentDao.findById(sid); request.put("sid", sid); sname = stu.getSname(); cid = stu.getSshClass().getCid(); request.put("sname", sname); request.put("cid", cid); return "update"; } public String update1(){ SshClass c = classDao.findById(cid); SshStudent stu = studentDao.findById(sid); stu.setSname(sname); stu.setSshClass(c); studentDao.update(stu); sid = null; sname = ""; cid = -1; return execute(); } }