以下是我写的一个Student的Servlet类，其中包含增删改查 ，在Servlet中的方法调用
package com.stu.servlet;
import java.io.IOException;
import java.sql.SQLException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.stu.bean.Student;
import com.stu.dao.ClasssDAO;
import com.stu.dao.StudentDAO;
public class StudentServlet extends HttpServlet {
public StudentServlet() {
super();
}
public void destroy() {
super.destroy();
}
public void add(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException, SQLException {
ClasssDAO studao = new ClasssDAO();
List list = studao.classList();
request.setAttribute("classslist", list);
request.getRequestDispatcher("student/add.jsp").forward(request, response);
}
public void list(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException, SQLException {
StudentDAO studao = new StudentDAO();
List list = studao.studentList();
request.setAttribute("list", list);
request.getRequestDispatcher("student/list.jsp").forward(request,response);
}
public void addProcess(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException, SQLException {
String name = request.getParameter("name");
String sex = request.getParameter("sex");
String phone = request.getParameter("phone");
int classsId = Integer.parseInt(request.getParameter("classsId"));
StudentDAO studao = new StudentDAO();
int row = studao.add(name, sex, phone, classsId);
request.getSession().setAttribute("row", row);
response.sendRedirect("result.jsp");
}
public void update(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException, SQLException {
int id = Integer.parseInt(request.getParameter("id"));
StudentDAO studao = new StudentDAO();
Student stu = studao.getstudentById(id);
List list = new ClasssDAO().classList();
request.setAttribute("stu", stu);
request.setAttribute("classsList", list);
request.getRequestDispatcher("student/update.jsp").forward(request, response);
}
public void updateProcess(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException, SQLException {
int id = Integer.parseInt(request.getParameter("id"));
String name = request.getParameter("name");
String sex = request.getParameter("sex");
String phone = request.getParameter("phone");
int classsId = Integer.parseInt(request.getParameter("classsId"));
StudentDAO studao = new StudentDAO();
int row = studao.update(id,name,sex,phone,classsId);
request.getSession().setAttribute("row",row);
response.sendRedirect("result.jsp");
}
public void delete(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException, SQLException {
int id = Integer.parseInt(request.getParameter("id"));
StudentDAO stu = new StudentDAO();
int row = stu.delete(id);
request.getSession().setAttribute("row", row);
response.sendRedirect("result.jsp");
}
public void process(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException, SQLException {
String method = request.getParameter("method");
if (null == method ||"list".equals(method)) {
list(request, response);
return;
}
else if ("add".equals(method)) {
add(request, response);
return;
}else if("addProcess".equals(method)){
addProcess(request, response);
return;
}else if("update".equals(method)){
update(request, response);
return;
}else if("updateProcess".equals(method)){
updateProcess(request, response);
return;
}else if("delete".equals(method)){
delete(request, response);
return;
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
process(request, response);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
process(request, response);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void init() throws ServletException {
}
}