ssm框架

整合SSM

1、使用的环境

环境：

IDEA
MySQL 8
Tomcat 8
Maven 3.5

要求：

需要熟练掌握MySQL数据库，Spring，JavaWeb及MyBatis知识，简单的前端知识；

2、数据库环境

创建一个存放书籍数据的数据库表

AUTO_INCREMENT 自动添加id

CREATE DATABASE `ssmbuild`;
USE `ssmbuild`;
DROP TABLE IF EXISTS `books`;
CREATE TABLE `books` (
    `bookID` INT(10) NOT NULL AUTO_INCREMENT COMMENT '书id',
    `bookName` VARCHAR(100) NOT NULL COMMENT '书名',
    `bookCounts` INT(11) NOT NULL COMMENT '数量',
    `detail` VARCHAR(200) NOT NULL COMMENT '描述',
    KEY `bookID` (`bookID`)
) ENGINE=INNODB DEFAULT CHARSET=utf8
INSERT INTO `books`(`bookID`,`bookName`,`bookCounts`,`detail`)VALUES
(1,'Java',1,'从入门到放弃'),
(2,'MySQL',10,'从删库到跑路'),
(3,'Linux',5,'从进门到进牢');

3、基本环境搭建

新建一Maven项目！ ssmbuild ，添加web的支持

导入相关的pom依赖！

<dependencies>
    <!--Junit-->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
    </dependency>
    <!--Lombok-->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.12</version>
        <scope>provided</scope>
    </dependency>
    <!--数据库驱动-->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.11</version>
    </dependency>
    <!-- 数据库连接池 -->
    <dependency>
        <groupId>com.mchange</groupId>
        <artifactId>c3p0</artifactId>
        <version>0.9.5.2</version>
    </dependency>
    <!--Servlet - JSP -->
    <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>
    <!--Mybatis-->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.5.2</version>
    </dependency>
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>2.0.2</version>
    </dependency>
    <!--Spring-->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>5.1.9.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>5.1.9.RELEASE</version>
    </dependency>
</dependencies>

Maven资源过滤设置

<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>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
            <filtering>false</filtering>
        </resource>
    </resources>
</build>

建立基本结构和配置框架！

com.xj.pojo
com.xj.dao
com.xj.service
com.xj.controller

mybatis-config.xml

<?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>

</configuration>

applicationContext.xml（Spring）

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/springbeans.xsd">

</beans>

4、Mybatis层编写

数据库配置文件 database.properties

注意：此处为mysql 8的配置

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?serverTimezone=GMT&createDatabaseIfNotExist=true&useUnicode=true&characterEncoding=utf-8&autoReconnect=true
jdbc.username=root
jdbc.password=1234

IDEA关联数据库

编写MyBatis的核心配置文件 mybatis-config.xml

<?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>
    <!--为改包下的实体类起别名-->
    <typeAliases>
        <package name="com.xj.pojo"/>
    </typeAliases>
    <!--注册映射文件-->
    <mappers>
        <mapper resource="com/xj/dao/BookMapper.xml"/>
    </mappers>
</configuration>

编写数据库对应的实体类 com.xj.pojo.Books

package com.xj.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;
}

编写Dao层的 Mapper接口！

package com.xj.dao;

import com.xj.pojo.Books;
import org.apache.ibatis.annotations.Param;

import java.util.List;

public interface BookMapper { 
    //增加一个Book
    int addBook(Books book);
    //根据id删除一个Book
    int deleteBookById(@Param("bookID") int id);
    //更新Book
    int updateBook(Books books);
    //根据id查询,返回一个Book
    Books queryBookById(@Param("bookID") int id);
    //查询全部Book,返回list集合
    List<Books> queryAllBook();
}

编写接口对应的 BookMapper.xml 文件。需要有导入MyBatis的包;

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.xj.dao.BookMapper">
    <!--增加一个Book-->
    <insert id="addBook" parameterType="Books">
        insert into ssmbuild.books (bookID,bookName,bookCounts,detail)
        values (#{ bookID} , #{ bookName} , #{ bookCounts} , #{ detail} );
    </insert>

    <!--根据id删除一个Book-->
    <delete id="deleteBookById" parameterType="int">
        delete from ssmbuild.books where bookID=#{ bookID} 
    </delete>

    <!--更新Book-->
    <update id="updateBook" parameterType="Books">
        update ssmbuild.books
        set bookID=#{ bookID} , bookName=#{ bookName} ,
            bookCounts=#{ bookCounts} , detail=#{ detail} 
        where bookID=#{ bookID} 
    </update>

    <!--根据id查询,返回一个Book-->
    <select id="queryBookById" parameterType="int">
        select * from ssmbuild.books where bookID=#{ bookID} 
    </select>

    <!--查询全部Book-->
    <select id="queryAllBook" resultType="Books">
       select * from ssmbuild.books
    </select>
</mapper>

编写Service层的接口和实现类

接口:（定义的方法与接口类的一样）

package com.xj.service;

import com.xj.pojo.Books;
import org.apache.ibatis.annotations.Param;

import java.util.List;

public interface BookService { 
    // 增加一个Book
    int addBook(Books book);
    // 根据id删除一个Book
    int deleteBookById(int id);
    // 更新Book
    int updateBook(Books books);
    // 根据id查询,返回一个Book
    Books queryBookById(int id);
    // 查询全部Book,返回list集合
    List<Books> queryAllBook();
}

实现类（面向接口）：

package com.xj.service;

import com.xj.dao.BookMapper;
import com.xj.pojo.Books;

import java.util.List;

public class BookServiceImpl implements BookService { 
    // 调用Dao层的操作，设置一个set接口，方便Spring管理
    private BookMapper bookMapper;
    public void setBookMapper(BookMapper bookMapper) { 
        this.bookMapper = bookMapper;
    } 

    public int addBook(Books book) { 
        return bookMapper.addBook(book);
    } 

    public int deleteBookById(int id) { 
        return bookMapper.deleteBookById(id);
    } 

    public int updateBook(Books books) { 
        return bookMapper.updateBook(books);
    } 

    public Books queryBookById(int id) { 
        return bookMapper.queryBookById(id);
    } 

    public List<Books> queryAllBook() { 
        return bookMapper.queryAllBook();
    } 
}

OK，到此，底层需求操作编写完毕！

5、Spring层

配置Spring整合MyBatis，我们这里数据源使用c3p0连接池；

我们去编写Spring整合Mybatis的相关的配置文件； spring-dao.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"
       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">
    <!-- 配置整合mybatis -->
    <!-- 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} "/>
        <!-- c3p0连接池的私有属性 -->
        <property name="maxPoolSize" value="30"/>
        <property name="minPoolSize" value="10"/>
        <!-- 关闭连接后不自动commit -->
        <property name="autoCommitOnClose" value="false"/>
        <!-- 获取连接超时时间 -->
        <property name="checkoutTimeout" value="10000"/>
        <!-- 当获取连接失败重试次数 -->
        <property name="acquireRetryAttempts" value="2"/>
    </bean>

    <!-- 3.配置SqlSessionFactory对象 -->
    <bean id="sqlSessionFactory"
          class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入数据库连接池 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- 配置MyBaties全局配置文件:mybatis-config.xml -->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>

    <!-- 4.配置扫描Dao接口包，动态实现Dao接口注入到spring容器中 -->
    <!--解释 ： https://www.cnblogs.com/jpfss/p/7799806.html-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 注入sqlSessionFactory -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!-- 给出需要扫描Dao接口包 -->
        <property name="basePackage" value="com.xj.dao"/>
    </bean>
</beans>

Spring整合service层; spring-service.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"
       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">

    <!-- 扫描service相关的bean -->
    <context:component-scan base-package="com.xj.service" />
    <!--BookServiceImpl注入到IOC容器中-->
    <bean id="bookServiceImpl" class="com.xj.service.BookServiceImpl">
        <property name="bookMapper" ref="bookMapper"/>
    </bean>
    <!-- 配置事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!-- 注入数据库连接池 -->
        <property name="dataSource" ref="dataSource" />
    </bean>
</beans>

Spring层搞定！再次理解一下，Spring就是一个大杂烩，一个容器！对吧！

6、SpringMVC层

添加框架支持

配置web.xml文件

这里需要加载的是总文件applicationContext.xml

<?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">
    <!--DispatcherServlet-->
    <servlet>
        <servlet-name>DispatcherServlet</servlet-name>
        <servletclass>
            org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <!--一定要注意:我们这里加载的是总的配置文件，之前被这里坑了！-->
            <param-value>classpath:applicationContext.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>DispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <!--encodingFilter-->
    <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过期时间-->
    <session-config>
        <session-timeout>15</session-timeout>
    </session-config>
</web-app>

spring-mvc.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: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/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.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.xj.controller" />
</beans>

Spring配置整合文件，applicationContext.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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd">

    <!--导入三部分文件-->
    <import resource="spring-dao.xml"/>
    <import resource="spring-service.xml"/>
    <import resource="spring-mvc.xml"/>
</beans>

配置文件，暂时结束！Controller 和视图层编写

7、Controller 和视图层编写

方法一：查询全部书籍

BookController 类编写

@Controller
@RequestMapping("/book")
public class BookController { 
    // 自动装配
    @Autowired
    @Qualifier("bookServiceImpl")
    private BookService bookService;

    @RequestMapping("/allBook")
    public String list(Model model) { 
        List<Books> list = bookService.queryAllBook();
        model.addAttribute("list", list);
        return "allBook";
    } 
}

编写首页 index.jsp（获取当前路径${pageContext.request.contextPath}）

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


    
        首页
        
    
    
        
            点击进入列表页

数据列表页面allBook.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>

    
        书籍列表
        
        
        
    
    
        
            
                
                    
                        
                            书籍列表 —— 显示所有书籍
                        
                    
                
            
            
                
                    新增
                
            
            
                
                    
                                
                        
                            
                                书籍编号
                                书籍名字
                                书籍数量
                                书籍详情
                                操作
                            
                        
                        
                            
                                    ${ book.getBookID()} 
                                    ${ book.getBookName()} 
                                    ${ book.getBookCounts()} 
                                    ${ book.getDetail()} 
                                    
                                        更改 |
                                        
                                            删除

配置Tomcat并启动测试，并对web导入包，不然出现404

书籍编号	书籍名字	书籍数量	书籍详情	操作
${ book.getBookID()}	${ book.getBookName()}	${ book.getBookCounts()}	${ book.getDetail()}	更改 \| 删除

方法二：添加书籍

BookController 类编写

@RequestMapping("/toAddBook")
public String toAddPaper() { 
    return "addBook";
} 
@RequestMapping("/addBook")
public String addPaper(Books books) { 
    System.out.println(books);
    bookService.addBook(books);
    return "redirect:/book/allBook";
}

添加书籍页面：addBook.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>

    
        新增书籍
        
        
        
    
    
        
            
                
                    
                        
                            新增书籍
                        
                    
                
            
            
                书籍名称：



                书籍数量：



                书籍详情：

方法三：修改书籍

BookController 类编写

@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);
    Books books = bookService.queryBookById(book.getBookID());
    model.addAttribute("books", books);
    return "redirect:/book/allBook";
}

修改书籍页面 updateBook.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>

    
        修改信息
        
        
        
    
    
        
            
                
                    
                        
                            修改信息
                        
                    
                
            
            
                
                书籍名称：
                书籍数量：
                书籍详情：

方法四：删除书籍

BookController 类编写

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

方法五：实现查询书籍功能

前端页面增加一个输入框和查询按钮
```
    
        
        
    
```

编写查询的Controller

@RequestMapping("/queryBook")
public String queryBook(String queryBookName,Model model){ 
    System.out.println("要查询的书籍:"+queryBookName);
    //业务逻辑还没有写
    return "allBook";
}

由于底层没有实现，所以我们要将底层代码先搞定(根据书名查询的功能)

BookMapper接口

//根据id查询,返回一个Book
Books queryBookByName(String bookName);

BookMapper.xml

<!--根据书名查询,返回一个Book-->
<select id="queryBookByName" resultType="Books">
    select * from ssmbuild.books
    where bookName = #{ bookName} 
</select>

Service接口

//根据id查询,返回一个Book
Books queryBookByName(String bookName);

Service实现类

public Books queryBookByName(String bookName) { 
    return bookMapper.queryBookByName(bookName);
}

完善Controller

@RequestMapping("/queryBook")
public String queryBook(String queryBookName,Model model){ 
    System.out.println("要查询的书籍:"+queryBookName);
    Books books = bookService.queryBookByName(queryBookName);
    List<Books> list = new ArrayList<Books>();
    list.add(books);
    model.addAttribute("list", list);
    return "allBook";
}

进行优化！我们发现查询的东西不存在的时候，查出来的页面是空的，我们可以提高一下用户的体验性！

在前端添加一个展示全部书籍的按钮

并在后台增加一些判断性的代码！

@RequestMapping("/queryBook")
public String queryBook(String queryBookName,Model model){ 
    System.out.println("要查询的书籍:"+queryBookName);
    //如果查询的数据存在空格，则优化
    Books books =
        bookService.queryBookByName(queryBookName.trim());
    List<Books> list = new ArrayList<Books>();
    list.add(books);
    //如果没有查出来书籍，则返回全部书籍列表
    if (books==null){ 
        list = bookService.queryAllBook();
        model.addAttribute("error", "没有找到本书！");
    } 
    model.addAttribute("list", list);
    return "allBook";
}

将错误信息展示在前台页面！完整的查询栏代码

<form class="form-inline" action="${ pageContext.request.contextPath} /book/queryBook" method="post"
      style="float: right">
    <span style="color:red;font-weight: bold">${ error} </span>
    <input type="text" name="queryBookName" class="form-control"
           placeholder="输入查询书名" required>
    <input type="submit" value="查询" class="btn btn-primary">
</form>

到目前为止，这个SSM项目整合已经完全的OK了，可以直接运行进行测试！这个练习十分的重要，大家
需要保证，不看任何东西，自己也可以完整的实现出来！

项目结构图:

报错：

无法在web.xml或使用此应用程序部署的jar文件中解析绝对uri：[http://java.sun.com/jsp/jstl/core]

解决方法：

修改D:\TomCat\apache-tomcat-8.5.53\conf的catalina.properties文件,可能是jstl包被跳过了

tomcat.util.scan.StandardJarScanFilter.jarsToSkip=\
taglibs-standard-compat-1.2.5.jar,\
taglibs-standard-impl-1.2.5.jar,\
taglibs-standard-jstlel-1.2.5.jar,\
taglibs-standard-spec-1.2.5,jar,\

如果不行在导入其他依赖

<!--jstl-->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>
<!--下面两个standard，试试哪个可以吧-->
<dependency>
    <groupId>taglibs</groupId>
    <artifactId>standard</artifactId>
    <version>1.1.2</version>
</dependency>
<dependency>
    <groupId>org.apache.taglibs</groupId>
    <artifactId>taglibs-standard-impl</artifactId>
    <version>1.2.5</version>
</dependency>

MySQL8的错误

修改url

jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?serverTimezone=GMT&createDatabaseIfNotExist=true&useUnicode=true&characterEncoding=utf-8&autoReconnect=true

修改导入的依赖

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.11</version>
</dependency>

谢谢光临~

本文作者：晓江
本文链接：https://lxjblog.gitee.io/2020/08/02/ssm/
版权声明：本博客所有文章除特别声明外，均默认采用许可协议。

整合SSM

1、使用的环境

2、数据库环境

3、基本环境搭建

4、Mybatis层编写

5、Spring层

6、SpringMVC层

7、Controller 和 视图层编写

方法一：查询全部书籍

点击进入列表页

书籍列表 —— 显示所有书籍

方法二：添加书籍

新增书籍

方法三：修改书籍

修改信息

方法四：删除书籍

方法五：实现查询书籍功能

报错：

7、Controller 和视图层编写