jsp的MVC设计模式

package ser; import impl.StudentImpl; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import pojo.Student; /* * 在JSP中,Ser它的作用是控制层 也就是获取前台的数据,并且把数据提交给业务逻辑层 * * Ser起着桥梁的作用 它符合MVC设计模式 * * V: view 视图 所有的JSP页面 ：功能：显示数据 获取数据 * * C: control: 控制层 功能：获取视图层的数据,并且调用业务逻辑类 * * M: Model: 负责数据录入 和业务逻辑的实现 * * */ public class StudentSer extends HttpServlet { /** * Constructor of the object. */ public StudentSer() { super(); System.out.println("----StudentSer-----"); } /** * Destruction of the servlet. <br> */ /* Ser 销毁的时候调用此方法 */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here System.out.println("----destory----"); } /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); } /** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8"); StudentImpl studentImpl=new StudentImpl(); Student student=new Student(); student.setSname(request.getParameter("sname")); student.setSaddress(request.getParameter("saddress")); String[] slikes=request.getParameterValues("slikes"); student.setSlikes(studentImpl.joinString(slikes)); studentImpl.saveStudent(student); } /** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */ // 初始化的方法,会在构造方法之后调用 public void init() throws ServletException { // Put your code here System.out.println("---init----"); } }