submitstudentcontroller.java

velocity的一个例子

package com.vc.controller;

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

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.SimpleFormController;
import org.springframework.web.servlet.view.RedirectView;

import com.vc.maps.Student;
import com.vc.service.StudentService;

public class SubmitStudentController extends SimpleFormController {
	private StudentService studentService;

	public StudentService getStudentService() {
		return studentService;
	}

	public void setStudentService(StudentService studentService) {
		this.studentService = studentService;
	}
	
	public ModelAndView onSubmit(Object command)
       throws ServletException{
		   Student student = (Student)command;
		   studentService.saveStudent(student);
		   return new ModelAndView(new RedirectView(getSuccessView()));
	   }
	
	//预创建表彰实例
	 protected Object formBackingObject(HttpServletRequest request) throws Exception {
		 Student student = new Student();
		 String str = request.getParameter("id");
		 if( str != null ){
			 student = studentService.getStudentById(Integer.parseInt(str));
		 }
		 
		 return student;
	 }

}