JavaWeb_day03_员工信息添加修改删除

时间：2024-01-10 19:21:02

day03员工的添加,修改,删除

修改功能

思路 : 点击修改员工数据之后,跳转到单行文本,查询要修改的员工id的全部信息,主键id设置为readonly,其余的都可以修改,

修改之后,提交按钮,提交之后跳转到全部员工界面

JavaWeb_day03_员工信息添加修改删除

修改界面 :

JavaWeb_day03_员工信息添加修改删除

部分代码 :

//点击修改跳转到UpShowEmp中转单行修改页面,并带上ID,可以查询员工id

"<td><a href=\"UpShowEmp?EmpID="+bean.getEmpID()+"\">修改<a></td>"

//中转修改界面

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

		//设置页面编码格式,显示汉字

		response.setContentType("text/html;charset=utf-8");

		String id = request.getParameter("EmpID");

		EmpDao dao = new EmpDao();

		EmpBean bean = new EmpBean();

		bean = dao.ShowMsgByID(id);

		PrintWriter pw = response.getWriter();//页面显示

		StringBuffer sb = new StringBuffer();

		sb.append("<html><body><form action=\"UpdateEmp\">");

		sb.append("<table align=center cellpadding=3 cellspacing=0>");

sb.append("<tr align=center><td>员工编码</td><td>员工姓氏</td><td>员工名字</td><td>员工工资</td><td>入职时间</td>");

		sb.append("</tr><tr><td><input type=text value="+bean.getEmpID()+" readonly name="+"empId"+"></td>");

		sb.append("<td><input type=text name="+"firstName"+" value="+bean.getFirstName()+"></td>");

		sb.append("<td><input type=text name="+"lastName"+" value="+bean.getLastName()+"></td>");

		sb.append("<td><input type=text name="+"salary"+" value="+bean.getSalary()+"></td>");

		sb.append("<td><input type=text name="+"hireDate"+" value="+bean.getHireDate()+"></td></tr>");

		sb.append("</table><table align=center cellpadding=3 cellspacing=0><tr><td><input type=submit value=\"提交\" name="+"submit></tr></td>");

		sb.append("</table ></form></body></html>");

		pw.write(sb.toString());

//修改提交之后的代码

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

		EmpBean bean = new EmpBean();

		EmpDao dao = new EmpDao();

		String empId = request.getParameter("empId");

		String firstName = request.getParameter("firstName");

		String lastName = request.getParameter("lastName");

		String salary = request.getParameter("salary");

		String hireDate = request.getParameter("hireDate");

		int EmpId = Integer.parseInt(empId);

		double sal = Double.parseDouble(salary);

		bean.setEmpID(EmpId);

		bean.setFirstName(firstName);

		bean.setLastName(lastName);

		bean.setSalary(sal);

		bean.setHireDate(hireDate);

		int column = dao.updateEmp(bean);

		System.out.println(column);

		if(column!=0){

			response.sendRedirect("ShowMsgByPage");

		}

	}

删除员工信息

那就相对简单了,点击删除之后,带上员工id,跳转到DeleteEmpServlet页面.然后request.getParameter获取传过来的id,dao中的delete方法输进去id,赋给int类型,若为1则删除成功,跳转全部员工页面.

 / /删除按钮

"<td><a href=\"DeleteEmp?EmpID="+bean.getEmpID()+"\">删除</a></td>

public class DeleteEmp extends HttpServlet {

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

		EmpDao dao = new EmpDao();

		String id = request.getParameter("EmpID");

		System.out.println(id);

		int column = dao.deleteEmp(id);

		if(column != 0){

			response.sendRedirect("ShowMsgByPage");

		}

	}

添加员工信息

单独设置一个a标签,点击添加之后,跳转到一个单行文本框的html页面,其中id不可以添加,序列自动生成,点击按钮之后跳转addEmpServlet界面,通过request.getParmeter获取添加的信息,然后在bean中set,然后调用dao添加方法,

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

		EmpBean bean = new EmpBean();

		EmpDao dao = new EmpDao();

		request.getParameter("submit");

		String firstName = request.getParameter("firstName");

		String lastName = request.getParameter("lastName");

		String salary = request.getParameter("salary");

		String hireDate = request.getParameter("hireDate");

		bean.setFirstName(firstName);

		bean.setLastName(lastName);

		bean.setHireDate(hireDate);

		bean.setSalary(Double.parseDouble(salary));

		int column = dao.addEmp(bean);

		//System.out.println(column);

		if(column!=0){

			response.sendRedirect("ShowMsgByPage");

		}

	}

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