src/com/controller/ClassesController.java

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package com.controller;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import java.util.Objects;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import com.util.PageUtil;
import com.util.UploadUtil;
import com.entity.Classes;
import com.entity.Teacher;
import com.service.ClassesService; 
@Controller
@RequestMapping("")
public class   ClassesController {
	private static final int rows = 10;
	@Autowired
	private ClassesService classesService;
	
	@RequestMapping("/classesAdd")
	public String classesAdd(HttpServletRequest request,HttpSession session)
	{
		String claname =request.getParameter("claname");
		Classes  classes = new Classes();
		classes.setClaname(claname);
		Classes classes1=classesService.selectByclasses(classes);		
		if(classes1!=null)
		{
			request.setAttribute("tishi", "班级名称已经存在，不能重复添加!");
			return "admin/classesAdd";
		}
		else
		{
	
    	boolean flag= classesService.add(classes);
    	if(flag==true)
		{
			request.setAttribute("tishi", "添加成功");
			return "admin/classesAdd";
		}
		else
		{
		   request.setAttribute("tishi", "添加失败!");
			return "admin/classesAdd";
		}
		}
 	}
	@RequestMapping("/classesManage")
	public String classesManage(HttpServletRequest request)
	{
		int page=1;
		if(request.getParameter("page")==null)
		{
			page=1;