controller:

package com.kakafa.controller;

import com.kakafa.pojo.Books;
import com.kakafa.service.BookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.List;

@Controller
@RequestMapping("/book")
public class BookController {

    @Autowired  //在属性中使用 @Autowired 注解来除去 setter 方法
    @Qualifier("BookServiceImpl")
    private BookService bookService;

    //查询所有书籍
    @RequestMapping("/allbook")
    public String list(Model model){
        List books=bookService.queryAllBook();
        model.addAttribute("list",books);
        return "allBook";
    }

    //跳转到增加书籍的页面
    @RequestMapping("/toaddbook")
    public String toaddBook(){
        return "addBook";
    }

    //添加书籍的请求
    @RequestMapping("/addbook")
    public String addBook(Books books){
        bookService.addBook(books);
        return "redirect:/book/allbook";
    }

    //修改
    @RequestMapping("/toUpdateBook")
    public String toUpdateBook(Model model, int id) {
        Books books = bookService.queryBookById(id);
        System.out.println(books);
        model.addAttribute("book",books );
        return "updateBook";
    }

    @RequestMapping("/updateBook")
    public String updateBook(Model model, Books book) {
        System.out.println(book);
        bookService.updateBook(book);
        return "redirect:/book/allbook";
    }

    //删除书籍
    @RequestMapping("/del/{bookId}")
    public String deleteBook(@PathVariable("bookId") int id) {
        bookService.deleteBookById(id);
        return "redirect:/book/allbook";
    }

}

allBook.jsp:

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    


书籍展示

新增书籍


            

    

        
书籍编号
        
书籍数量
        
书籍名称
        
书籍详情
        
操作
    

       

                
${book.bookID}
                
${book.bookCounts}
                
${book.bookName}
                
${book.detail}
                

                     修改 
                    删除
                
            
       

updateBook.jsp:

<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    





    
    书籍名称：
    书籍数量：
    书籍详情：
    

addBook.jsp:

<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    




    书籍名称：



    书籍数量：



    书籍详情：



    

kuang老师的代码：https://mp.weixin.qq.com/s/SDxqGu_il3MUCTcN1EYrng

注意：过程中出现中文乱码的问题，发现是因为springMvc的乱码过滤写错了，正确的是如下：

    
    
        CharacterEncodingFilter
        org.springframework.web.filter.CharacterEncodingFilter
        
            encoding
            utf-8
        
    
    
        CharacterEncodingFilter
        /*