1.设置pojo包-Books类
=====================
package com.ming.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Books {
private int bookID;
private String bookName;
private int bookCounts;
private String detail;
}
=============User.java
package com.ming.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {
private int id;
private String username;
private String password;
}

2.dao包，dao包下有interface的BooksMapper和BooksMapper.xml
===================BooksMapper.java
package com.ming.dao;
import com.ming.pojo.Books;
import org.apache.ibatis.annotations.Param;
import java.util.List;
public interface BooksMapper {
List<Books> getBooksList();
// List<Books> getid();
// int add(@Param("bookid")int id);
int deleteBooks(@Param("bookID") int id);
int addBooks(Books book);
Books getBooksByid(@Param("bookID") int id);
int updateBooks(Books book);
List<Books> getBooksListLike(@Param("values") String bookName);
}
==========================BooksMapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.ming.dao.BooksMapper">
<select id="getBooksList" resultType="Books">
select * from ssmbuild.books
</select>
<delete id="deleteBooks">
delete from books where bookID=#{bookID}
</delete>
<insert id="addBooks" parameterType="Books">
insert into books(bookName, bookCounts, detail) values(#{bookName},#{bookCounts},#{detail})
</insert>
<select id="getBooksByid" resultType="Books">
select * from books where bookID=#{bookID}
</select>
<update id="updateBooks" parameterType="Books">
update books set bookID=#{bookID},bookName=#{bookName},bookCounts=#{bookCounts},detail=#{detail} where bookID=#{bookID}
</update>
<select id="getBooksListLike" resultType="Books">
select * from books where bookName like "%"#{values}"%"
</select>
</mapper>
===========================
dao，service：都是一个接口+一个实现类（.xml或者impl.java）
1.mapper定义接口的方法：
int deleteBooks(@Param("bookID") int id);
void 方法名字（@Param("数据库里的属性") ,临时参数）;
2.xml定义接口的方法的内容:
<mapper namespace="com.ming.dao.BooksMapper">
<select id="getBooksByid" resultType="Books">
select * from books where bookID=#{bookID}
</select>
</mapper>
<mapper namespace="com.改.dao.该Mapper的名字">
<select id="对应mapper里的方法的方法名" resultType="Books（实体类名？）">
select * from books where 数据库里的属性=#{数据库里的属性}
</select>
</mapper>

2.service里BooksService.java和BooksServiceImpl.java
=================BooksService.java
package com.ming.service;
import com.ming.pojo.Books;
import org.apache.ibatis.annotations.Param;
import java.util.List;
public interface BooksService {
List<Books> getBooksList();
int deleteBooks(@Param("bookID") int id);
int addBooks(Books book);
Books getBooksByid(@Param("bookID") int id);
int updateBooks(Books book);
List<Books> getBooksListLike(@Param("values") String bookName);
}
===================BooksServiceImpl.java
package com.ming.service;
import com.ming.dao.BooksMapper;
import com.ming.pojo.Books;
import java.util.List;
public class BooksServiceImpl implements BooksService{
private BooksMapper booksMapper;
public void setBooksMapper(BooksMapper booksMapper) {
this.booksMapper = booksMapper;
}
@Override
public List<Books> getBooksList() {
return booksMapper.getBooksList();
}
@Override
public int deleteBooks(int id) {
return booksMapper.deleteBooks(id);
}
@Override
public int addBooks(Books book) {
return booksMapper.addBooks(book);
}
@Override
public Books getBooksByid(int id) {
return booksMapper.getBooksByid(id);
}
@Override
public int updateBooks(Books book) {
return booksMapper.updateBooks(book);
}
@Override
public List<Books> getBooksListLike(String bookName) {
return booksMapper.getBooksListLike(bookName);
}
}
=========================
3.BooksService层：抄mapper
4.BooksServiceImpl：
4.1:把mapper接口（类）弄过来在这个页面定义一下。private BooksMapper booksMapper;
4.2：public void setBooksMapper(BooksMapper booksMapper) {
this.booksMapper = booksMapper;
}
4.2：@Override
public int deleteBooks(int id) {
return booksMapper.deleteBooks(id);
}
mapper与service里：
int deleteBooks(@Param("bookID") int id);
impl：（实现service的方式是returnmapper里方法）
加public int deleteBooks(int id){
return Mapper名字.mapper里这个方法的名字();
}

3.controller下的UserController
=====================
package com.ming.controller;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.ming.pojo.Books;
import com.ming.service.BooksServiceImpl;
import com.ming.service.UserServiceImpl;
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 org.springframework.web.bind.annotation.RequestParam;
import javax.servlet.http.HttpSession;
import java.util.List;
@Controller
public class UserController {
@Autowired
@Qualifier("UserServiceImpl")
private UserServiceImpl userService;
@Autowired
@Qualifier("BooksServiceImpl")
private BooksServiceImpl booksService;
@RequestMapping("/books/{pn}")
public String tobooks(Model model,@PathVariable("pn") int pn){
PageHelper.startPage(pn,4);
List<Books> booksList=booksService.getBooksList();
PageInfo<Books> pageInfo=new PageInfo<>(booksList);
model.addAttribute("page",pageInfo);
return "books";
}
@RequestMapping("/tologin")
public String tologin()
{
return "login";
}
@RequestMapping("/login")
public String login(String username, String password, Model model, HttpSession session,@RequestParam(value = "pn",defaultValue = "1") int pn)
{
if(username.equals("ming") && password.equals("123456"))
{
session.setAttribute("username",username);
PageHelper.startPage(pn,4);
List<Books> booksList=booksService.getBooksList();
PageInfo<Books> pageInfo=new PageInfo<>(booksList);
model.addAttribute("page",pageInfo);
model.addAttribute("username",username);
return "books";
}
else
{
String msg="你的账户有大问题";
model.addAttribute("msg",msg);
return "login";
}
}
@RequestMapping("/delete/{bookID}")
public String delete(@PathVariable("bookID") int id)
{
booksService.deleteBooks(id);
return "redirect:/books/1";
}
@RequestMapping("/toadd")
public String add()
{
return "addbooks";
}
@RequestMapping("/add")
public String add1(Books book)
{
booksService.addBooks(book);
return "redirect:/books/1";
}
@RequestMapping("/toupdate/{bookID}")
public String update(Model model,@PathVariable("bookID") int id)
{
Books book = booksService.getBooksByid(id);
model.addAttribute("book",book);
return "updatebooks";
}
@RequestMapping("/update")
public String update1(Books book)
{
booksService.updateBooks(book);
return "redirect:/books/1";
}
@RequestMapping("/select/{pn}")
public String select(String bookName,Model model,@PathVariable("pn") int pn)
{
PageHelper.startPage(pn,4);
List<Books> booksListLike = booksService.getBooksListLike(bookName);
PageInfo<Books> pageInfo=new PageInfo<>(booksListLike);
model.addAttribute("page",pageInfo);
return "books";
}
@RequestMapping("/unlogin")
public String unlogin(HttpSession session)
{
session.invalidate();
return "login";
}
}
==================
6.controller
6.1:载入service
@Autowired
@Qualifier("BooksServiceImpl")
private BooksServiceImpl booksService;
6.2:有/是代表方法，没/是代表jsp
@RequestMapping("/tologin")
public String tologin()
{
return "login";
}
@RequestMapping("/这个方法的名字")
public String tologin()
{
return "jsp名字";
}
6.3调用的方法需要传参数：
改查，其中 改 要几个属性所以要表单调用方法。要表单就要跳转有表单的页面。先a /toupdata再在 /toupdata调用updata方法
@RequestMapping("/toupdate/{bookID}")//最终调用的改的方法要用到bookid，所以从jsp获取bookid
public String update(Model model,@PathVariable("bookID") int id)//临时参数id对应数据库属性bookID
{
Books book = booksService.getBooksByid(id);
model.addAttribute("book",book);//jsp里临时book类里。不对，哪儿有？
return "updatebooks";
}
@RequestMapping("/update")
public String update1(Books book)//临时book类传进来
{
booksService.updateBooks(book);//真正调用修改方法
return "redirect:/books/1";
}
7.模糊查找的东西太多，要分页装。
@RequestMapping("/select/{pn}")
public String select(String bookName,Model model,@PathVariable("pn") int pn)
{
PageHelper.startPage(pn,4);//
List<Books> booksListLike = booksService.getBooksListLike(bookName);//把查询结果定义，名字叫booksListLike
PageInfo<Books类名> pageInfo=new PageInfo<>(booksListLike);//把booksListLike 转成 PageInfo类型
model.addAttribute("page",pageInfo);//pageInfo加进去，叫page
return "books";//回到books.jsp
}

4，interceptor下的LoginInterceptor.java
=========================
package com.ming.interceptor;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class LoginInterceptor implements HandlerInterceptor {
@Override
public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3)
throws Exception {
// TODO Auto-generated method stub
}
@Override
public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)
throws Exception {
// TODO Auto-generated method stub
}
@Override
public boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2) throws Exception {
HttpSession session = arg0.getSession();
//String uri = request.getRequestURI(); // 获取登录的uri，这个是不进行拦截的
//if(session.getAttribute("LOGIN_USER")!=null || uri.indexOf("system/login")!=-1) {// 说明登录成功 或者 执行登录功能
if(session.getAttribute("username")!=null) {
// 登录成功不拦截
return true;
}else {
// 拦截后进入登录页面
arg1.sendRedirect(arg0.getContextPath()+"/tologin");
return false;
}
}
}

拦截器补充
拦截器：
拦截后跳转。拦截成功or 失败。改跳转路径

二、资源配置
1.pom.xml
==================依赖
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.26</version>
</dependency>
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.5</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.7</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.6</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.3.10</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.3.10</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>5.3.10</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.7</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.20</version>
</dependency>
<dependency>
<groupId>org.thymeleaf</groupId>
<artifactId>thymeleaf</artifactId>
<version>3.0.12.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.thymeleaf/thymeleaf-spring5 -->
<dependency>
<groupId>org.thymeleaf</groupId>
<artifactId>thymeleaf-spring5</artifactId>
<version>3.0.12.RELEASE</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>5.1.4</version>
</dependency>
</dependencies>
============================过滤
<build>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.*</include>
</includes>
<filtering>false</filtering>
</resource>
</resources>
</build>
======================================
2.mybatis-config.xml
----------------------
记得改ming为xixi
----------------------
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<typeAliases>
<package name="com.ming.pojo"/>
</typeAliases>
</configuration>
========================================
3.database.properties
-------------------------------
数据库的连接，可以改一下密码
-------------------------------
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=false&useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=12345
========================================
3.applicationContext.xml
-------------------------------
导入sping-dao，service，controller的3个配置xml
-------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<import resource="classpath:spring-dao.xml"/>
<import resource="classpath:spring-service.xml"/>
<import resource="classpath:springmvc-controller.xml"/>
</beans>

========================================
4.spring-dao.xml
-------------------------------
数据库连接池，可以改数据库密码，最后一行的ming一定要改
-------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!-- 1.关联数据库文件 -->
<context:property-placeholder location="classpath:database.properties"/>
<!-- 2.数据库连接池 -->
<!--数据库连接池
dbcp 半自动化操作 不能自动连接
c3p0 自动化操作（自动的加载配置文件 并且设置到对象里面）
-->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<!-- 配置连接池属性 -->
<property name="driverClass" value="${jdbc.driver}"/>
<property name="jdbcUrl" value="${jdbc.url}"/>
<property name="user" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<!-- 3.配置SqlSessionFactory对象 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!-- 绑定配置MyBaties全局配置文件:mybatis-config.xml -->
<property name="configLocation" value="classpath:mybatis-config.xml"/><!-- -->
<property name="plugins">
<array>
<bean class="com.github.pagehelper.PageInterceptor">
<property name="properties">
<value>
<!--配置PageHelper-->
offsetAsPageNum=true
reasonable=true
rowBoundsWithCount=true
pageSizeZero=true
</value>
</property>
</bean>
</array>
</property>
</bean>
<!-- 4.配置扫描Dao接口包，动态实现Dao接口注入到spring容器中 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
<property name="basePackage" value="com.ming.dao"/>
</bean>
</beans>

========================================
5.spring-service.xml
-------------------------------
注册service包（改ming），bean里注册impl和Transcation，mvc里注册interceptors
-------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<context:component-scan base-package="com.ming.service"/>
<bean id="UserServiceImpl" class="com.ming.service.UserServiceImpl">
<property name="userMapper" ref="userMapper"/>
</bean>
<bean id="BooksServiceImpl" class="com.ming.service.BooksServiceImpl">
<property name="booksMapper" ref="booksMapper"/>
</bean>
<bean id="Transcation" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/**"/>
<mvc:exclude-mapping path="/tologin"/>
<mvc:exclude-mapping path="/login"/>
<bean class="com.ming.interceptor.LoginInterceptor"/>
</mvc:interceptor>
</mvc:interceptors>
</beans>
========================================
6.springmvc-controller.xml
-------------------------------
注册web/jsp路径，记得改最后的
-------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
https://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!-- 配置SpringMVC -->
<!-- 1.开启SpringMVC注解驱动 -->
<mvc:annotation-driven />
<!-- 2.静态资源默认servlet配置-->
<mvc:default-servlet-handler/>
<!-- 3.配置jsp 显示ViewResolver视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
<!-- 4.扫描web相关的bean -->
<context:component-scan base-package="com.ming.controller" />
</beans>

笔记以便理解：
===============================
dao，service：都是一个接口+一个实现类（.xml或者impl.java）
1.mapper定义接口的方法：
int deleteBooks(@Param("bookID") int id);
void 方法名字（@Param("数据库里的属性") ,临时参数）;
2.xml定义接口的方法的内容:
<mapper namespace="com.ming.dao.BooksMapper">
<select id="getBooksByid" resultType="Books">
select * from books where bookID=#{bookID}
</select>
</mapper>
<mapper namespace="com.改.dao.该Mapper的名字">
<select id="对应mapper里的方法的方法名" resultType="Books（实体类名？）">
select * from books where 数据库里的属性=#{数据库里的属性}
</select>
</mapper>
3.BooksService层：抄mapper
4.BooksServiceImpl：
4.1:把mapper接口（类）弄过来在这个页面定义一下。private BooksMapper booksMapper;
4.2：public void setBooksMapper(BooksMapper booksMapper) {
this.booksMapper = booksMapper;
}
4.2：@Override
public int deleteBooks(int id) {
return booksMapper.deleteBooks(id);
}
mapper与service里：
int deleteBooks(@Param("bookID") int id);
impl：（实现service的方式是returnmapper里方法）
加public int deleteBooks(int id){
return Mapper名字.mapper里这个方法的名字();
}
5.jsp
表单跳转
<form action="${pageContext.request.contextPath}/login">
点击跳转
<a href="${pageContext.request.contextPath}/unlogin">注销</a>
分页
<a href="/books/${page.getNavigateFirstPage()}">首页</a>
6.controller
6.1:载入service
@Autowired
@Qualifier("BooksServiceImpl")
private BooksServiceImpl booksService;
6.2:有/是代表方法，没/是代表jsp
@RequestMapping("/tologin")
public String tologin()
{
return "login";
}
@RequestMapping("/这个方法的名字")
public String tologin()
{
return "jsp名字";
}
6.3调用的方法需要传参数：
改查，其中 改 要几个属性所以要表单调用方法。要表单就要跳转有表单的页面。先a /toupdata再在 /toupdata调用updata方法
@RequestMapping("/toupdate/{bookID}")//最终调用的改的方法要用到bookid，所以从jsp获取bookid
public String update(Model model,@PathVariable("bookID") int id)//临时参数id对应数据库属性bookID
{
Books book = booksService.getBooksByid(id);
model.addAttribute("book",book);//jsp里临时book类里。不对，哪儿有？
return "updatebooks";
}
@RequestMapping("/update")
public String update1(Books book)//临时book类传进来
{
booksService.updateBooks(book);//真正调用修改方法
return "redirect:/books/1";
}
7.模糊查找的东西太多，要分页装。
@RequestMapping("/select/{pn}")
public String select(String bookName,Model model,@PathVariable("pn") int pn)
{
PageHelper.startPage(pn,4);//
List<Books> booksListLike = booksService.getBooksListLike(bookName);//把查询结果定义，名字叫booksListLike
PageInfo<Books类名> pageInfo=new PageInfo<>(booksListLike);//把booksListLike 转成 PageInfo类型
model.addAttribute("page",pageInfo);//pageInfo加进去，叫page
return "books";//回到books.jsp
}
8.拦截器
拦截后跳转。拦截成功or 失败。改跳转路径
9.appli里是导入spring三个xml的
mybatis.xml 是注册实体类
db.p数据库关于数据库的配置，例如改密码
springdao里是数据库的驱动，用了数据池，配置数据池的地方可以改数据库配置例如密码。下面bean里扫描dao接口包，一定改dao的路径名。
spring service：1.context里注册service路径，2.bean里注册impl和一个transcation不知道是啥。3.mvc了拦截器
控制器，自己改改

jsp包
========================================
1.index.jsp
------------------------------
这个在web下，web-inf外面。别的都在web-inf下，在web-inf下的会被隐藏，用户不能直接看到
-------------------------------
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>$Title$</title>
</head>
<body>
<a href="${pageContext.request.contextPath}/tologin">跳转到登录</a>
</body>
</html>
========================================
2.addbooks.jsp
------------------------------
在web-inf下
-------------------------------
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>添加图书</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/add">
图书名称：<input type="text" name="bookName"><br>
图书数量：<input type="text" name="bookCounts"><br>
图书细节：<input type="text" name="detail"><br>
<button type="submit">增加</button>
</form>
</body>
</html>
========================================
3.books.jsp
------------------------------
在web-inf下，含有分页
-------------------------------
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<span>现在登录的用户是</span>
<span>${username}</span>
<a href="${pageContext.request.contextPath}/unlogin">注销</a>
<form action="${pageContext.request.contextPath}/select/1">
<input type="text" name="bookName" placeholder="请输入要查找的商品">
<button type="submit">搜索</button>
</form>
<table>
<thead>
<tr>
<th>图书ID</th>
<th>图书名称</th>
<th>图书数量</th>
<th>图书简介</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<c:forEach var="books" items="${page.list}">
<tr>
<td>${books.bookID}</td>
<td>${books.bookName}</td>
<td>${books.bookCounts}</td>
<td>${books.detail}</td>
<td>
<a href="${pageContext.request.contextPath}/toupdate/${books.bookID}">修改</a>
<a href="${pageContext.request.contextPath}/delete/${books.bookID}">删除</a>
</td>
</tr>
</c:forEach>
</tbody>
</table>
<a href="${pageContext.request.contextPath}/toadd">增加</a>
<div>
<div>
<a href="/books/${page.getNavigateFirstPage()}">首页</a>
</div>
<div c:if="${page.hasPreviousPage}">
<a href="/books/${page.prePage}">上一页</a>
</div>
<span>当前页数：${page.pageNum}</span>
<div c:if="${page.hasNextPage}">
<a href="/books/${page.nextPage}">下一页</a>
</div>
<div>
<a href="/books/${page.getNavigateLastPage()}">尾页</a>
</div>
</div>
</body>
</html>
========================================
4.login.jsp
------------------------------
在web-inf下
-------------------------------
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>登录页面</title>
<link rel="stylesheet" href="/static/css/bootstrap.css">
<script src="/static/js/bootstrap.js"></script>
</head>
<body>
<form action="${pageContext.request.contextPath}/login">
<div class="form-group">
<label for="exampleInputEmail1">Email address</label>
<input type="text" name="username" class="form-control" id="exampleInputEmail1" aria-describedby="emailHelp">
<small id="emailHelp" class="form-text text-muted">We'll never share your email with anyone else.</small>
</div>
<div class="form-group">
<label for="exampleInputPassword1">Password</label>
<input type="password" name="password" class="form-control" id="exampleInputPassword1">
</div>
<div class="form-group form-check">
<input type="checkbox" class="form-check-input" id="exampleCheck1">
<label class="form-check-label" for="exampleCheck1">Check me out</label>
</div>
<button type="submit" class="btn btn-primary">Submit</button>
</form>
</body>
</html>
========================================
4.updatebooks.jsp
------------------------------
在web-inf下
-------------------------------
<html>
<head>
<title>更改图书</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/update">
图书ID：<input type="text" value="${books.bookID}" name="bookID"><br>
图书名称：<input type="text" value="${books.bookName}" name="bookName"><br>
图书数量：<input type="text" value="${books.bookCounts}" name="bookCounts"><br>
图书细节：<input type="text" value="${books.detail}" name="detail"><br>
<button type="submit">修改</button>
</form>
</body>
</html>

！！！！.web.xml里
========================================
web.xml
------------------------------
配置spring的servlet， <filter>，和session
-------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<session-config>
<session-timeout>15</session-timeout>
</session-config>
</web-app>

tip2.新增lombok依赖，请填进pom.xml
=====================
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.16.10</version>
<scope>provided</scope>
</dependency>

导航：-------------------
1楼项目总览，
2楼pojo，
3楼dao，
4楼sevice，
5楼controller
6楼拦截器interceptor，
8到10楼资源配置（pom.xml和6个file），
12楼jsp，
13楼web.xml，
14楼新增Lombok依赖。