linkmangroupservlet.java

一个jsp的oa系统,里面有很多亮点学习!

package com.oa.lp.servlet;

import java.io.IOException;
import java.sql.Connection;
import java.sql.Date;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.oa.lp.dao.LinkManGroupDAO;
import com.oa.lp.database.DataBase;
import com.oa.lp.model.Employee;
import com.oa.lp.model.LinkManGroup;


public class LinkManGroupServlet extends TopServlet{
	   static final long serialVersionUID = 1L;

	   
	   protected void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		   String method = request.getParameter("method")==null?"":request.getParameter("method");
		   String groupId = request.getParameter("groupId")==null?"0":request.getParameter("groupId");
		   String groupName = request.getParameter("groupName")==null?"":request.getParameter("groupName");
		   LinkManGroup linkMangroup = new LinkManGroup();
		   if(groupId.length()>0){
			   linkMangroup.setGroupId(Integer.parseInt(groupId));   
		   }
		 
		   linkMangroup.setGroupName(groupName); 
		   HttpSession session = request.getSession();
		   Connection conn=null;
		try {
			Employee emp = (Employee) session.getAttribute("emp");
			conn = DataBase.getConnection();
			LinkManGroupDAO linkManGroupDao = new LinkManGroupDAO();
			linkManGroupDao.setConn(conn);
			
			if(method.equals("list")){
				
				request.setAttribute("lps",linkManGroupDao.listAllGroups(emp.getEmpId()));
				this.forward(request, response,"/system/linkManGroup/list.jsp");
			}else if(method.equals("edit")){
				request.setAttribute("lps",linkManGroupDao.getLinkManGroupById(linkMangroup.getGroupId()));
				this.forward(request, response,"/system/linkManGroup/linkManGroup.jsp");
			}else if(method.equals("update")){
				linkManGroupDao.updateGroup(linkMangroup,emp.getEmpId());
				this.sendRedirect(request, response,"/LinkManGroupServlet?method=list");	
			}else if(method.equals("del")){
				
				linkManGroupDao.delLinkManGroupById(Integer.parseInt(groupId));
				this.sendRedirect(request, response,"/LinkManGroupServlet?method=list");
			}else if(method.equals("add")){	
				linkManGroupDao.addGroup(linkMangroup,emp.getEmpId());
				this.sendRedirect(request, response,"/LinkManGroupServlet?method=list");
			}else if(method.equals("addLoad")){
				this.forward(request, response,"/system/linkManGroup/linkManGroup.jsp");
			}
			//事务提交
			DataBase.commit();
			
		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			if(conn!=null){
				//关闭连接
				DataBase.releaseConnection(conn);
			}
		}	   
	}    
	}