Spring MVC数据绑定概述及原理详解

package com.ssm.controller;
import javax.servlet.http.HttpServletRequest;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class UserController {
	@RequestMapping(value="/selectUser")
	public String selectUser(HttpServletRequest request) {
		String id=request.getParameter("id");
		System.out.println("id="+id);
		return "success";
	}
}

@RequestMapping("/toRegister")
	public String toRegister() {
		return "register";
	}
	@RequestMapping("/registerUser")
	public String registerUser(User user) {
		String username=user.getUserName();
		String password=user.getPassword();
		System.out.println("username="+username);
		System.out.println("password="+password);		
		return "success";
	}

package com.ssm.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import com.ssm.po.Banji;
import com.ssm.po.Student;
@Controller
public class StudentController {
	//向学生查询页面跳转
	@RequestMapping("/tofindStudentWithBanji")
	public String tofindStudentWithBanji(){
		return "student";
	}
	//查询学生和班级信息
	@RequestMapping("/findStudentWithBanji")
public String findStudentWithBanji(Student student){
		Integer stu_id=student.getStu_id();		
		Banji banji=student.getBanji();
		String banji_name=banji.getBanji_name();
		System.out.println("stu_id="+stu_id);
		System.out.println("banji_name="+banji_name);
		return "success";
	}
}

package com.ssm.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class CourseController {
		@RequestMapping("/toCourse")
		public String toCourse(){
			return "course";
		}
		@RequestMapping("/deleteCourse")
		public String deleteCourse(Integer[] ids){
			if(ids!=null){
				//使用输出语句模拟已经删除的课程
				for(Integer id:ids){
					System.out.println("删除了id为"+id+"的课程");
				}
			}else{
				System.out.println("ids=null");
			}
			return "success";
		}
}

//向用户批量修改页面跳转
	@RequestMapping("/toUserEdit")
	public String toUserEdit() {
		return "user_edit";
	}
	//接收批量修改用户的方法
	@RequestMapping("/editUsers")
	public String editUsers(UserVo userList){
		//将所有用户数据封装到集合中
		List<User> users=userList.getUsers();
		for(User user:users){
			if(user.getId()!=null){
				System.out.println("删除了id为"+user.getId()+"的用户名为"+
user.getUsername());
			}
		}
		return "success";
	}