emproleservlet.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.EmpRoleDAO;
import com.oa.lp.dao.EmployeeDAO;
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 EmpRoleServlet extends TopServlet {

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

		
		String method = request.getParameter("method")==null?"":request.getParameter("method");
		String empIdStr = request.getParameter("empId")==null?"0":request.getParameter("empId");
		String []roleIds = request.getParameterValues("roleIds");
		int empId=0;
		if(empIdStr.length()>0){
			empId = Integer.parseInt(empIdStr);
		}
		Connection conn=null;
		try{
			conn = DataBase.getConnection();
			RoleDAO roleDao = new RoleDAO();
			EmployeeDAO empDao = new EmployeeDAO();
			EmpRoleDAO empRoleDao = new EmpRoleDAO();
			RolePowerDAO rolePowerDao = new RolePowerDAO();
			roleDao.setConn(conn);
			empDao.setConn(conn);
			empRoleDao.setConn(conn);
			
			 if(method.equals("addLoad")){
				 //角色集合
				 request.setAttribute("roles", roleDao.listAllRole());
				 request.setAttribute("emp",empDao.getById(empId));
				 request.setAttribute("empRoles",empRoleDao.getRoleByEmpId(empId));
				 this.forward(request, response, "/system/employee/empRole.jsp");
			 }else if(method.equals("add")){
				 //分配权限
				if(roleIds.length>1){
					//先删除后添加
					empRoleDao.delRolePower(empId);
					empRoleDao.addEmpRole(empId,roleIds);
				}else{
					//删除所有
					empRoleDao.delRolePower(empId);
				}
				this.sendRedirect(request, response,"/EmployeeServlet?method=list");
			 }
			//事务提交
			DataBase.commit();
		}catch(Exception e){
			e.printStackTrace();
		}finally{
			if(conn!=null){
				//关闭连接
				DataBase.releaseConnection(conn);
			}
		}

		 
	}
}