rolepowerservlet.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.io.PrintWriter;
import java.sql.Connection;

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

import com.oa.lp.dao.MenuDAO;
import com.oa.lp.dao.PowerDAO;
import com.oa.lp.dao.RoleDAO;
import com.oa.lp.dao.RolePowerDAO;
import com.oa.lp.database.DataBase;

public class RolePowerServlet extends TopServlet {

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		
		String method = request.getParameter("method")==null?"":request.getParameter("method");
		String roleIdStr = request.getParameter("roleId")==null?"0":request.getParameter("roleId");
		String []powerIds = request.getParameterValues("powerIds");
		int roleId=0;
		if(roleIdStr.length()>0){
			roleId = Integer.parseInt(roleIdStr);
		}
		Connection conn=null;
		try{
			conn = DataBase.getConnection();
			MenuDAO menuDao = new MenuDAO();
			PowerDAO powerDao = new PowerDAO();
			RoleDAO roleDao = new RoleDAO();
			RolePowerDAO rolePowerDao = new RolePowerDAO();
			menuDao.setConn(conn);
			powerDao.setConn(conn);
			roleDao.setConn(conn);
			rolePowerDao.setConn(conn);
			 if(method.equals("addLoad")){
				 //加载权限
				 request.setAttribute("role", roleDao.getById(roleId));
				 request.setAttribute("menus",menuDao.listAllMenu());
				 request.setAttribute("powers",powerDao.listAllPower(1));
				 request.setAttribute("rolePowers",rolePowerDao.getPowersByRoleId(roleId));
				 this.forward(request, response, "/system/role/rolePower.jsp");
			 }else if(method.equals("add")){
				 //分配权限
				if(powerIds.length>1){
					//先删除后添加
					rolePowerDao.delRolePower(roleId);
					rolePowerDao.addRolePower(roleId, powerIds);
				}else{
					//删除所有
					rolePowerDao.delRolePower(roleId);
				}
				this.sendRedirect(request, response,"/RoleServlet?method=list");
			 }
			//事务提交
			DataBase.commit();
		}catch(Exception e){
			e.printStackTrace();
		}finally{
			if(conn!=null){
				//关闭连接
				DataBase.releaseConnection(conn);
			}
		}

		 
	}
}