SSM整合搭建

预备条件

项目结构

建表

create database `BookSale`;
use  `BookSale`;

create table `books`(
    bookID int NOT NULL AUTO_INCREMENT primary key ,
    bookName varchar(20),
    bookCounts int,
    detail text(100)
)engine innodb default charset=utf8;

insert into books (bookName, bookCounts, detail)
values ('Java',1,'从入门到放弃'),
('MySQL',10,'从删库到跑路'),
('Linux',5,'从进门到进牢');

导包

<dependencies>
    <!--junit-->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
        <scope>test</scope>
    </dependency>

    <!--数据库驱动-->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.31</version>
    </dependency>
    <!--数据库连接池：c3p0-->
    <dependency>
        <groupId>com.mchange</groupId>
        <artifactId>c3p0</artifactId>
        <version>0.9.5.2</version>
    </dependency>

    <!--servlet，jsp，jstl-->
    <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>5.2.12.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>5.1.19.RELEASE</version>
    </dependency>

    <!--lombok-->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.12</version>
    </dependency>
</dependencies>

静态资源过滤

<build>
    <resources>
        <resource>
            <directory>src/main/java</directory>
            <includes>
                <include>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
            <filtering>true</filtering>
        </resource>
    </resources>
</build>

Mybatis层

database.properties

driver=com.mysql.jdbc.Driver
# MySQL8.0以上需要添加时区配置：&serverTimezone=Asia/Shanghai
url=jdbc:mysql://localhost:3306/booksale?useUnicode=true&characterEncoding=utf-8
username=root
password=123456

实体类Books.java

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Books {
    private int bookID;
    private String bookName;
    private int bookCounts;
    private String detail;
}

BookMapper.java

public interface BookMapper {
    int addBook(Books books);
    int deleteBookById(@Param("bookId") int id);
    int updateBook(Books books);
    Books queryBookById(@Param("bookId") int id);
    List<Books> queryAllBook();
    List<Books> queryBookByName(String bookName);
}

BookMapper.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.lan5th.dao.BookMapper">
    <insert id="addBook" parameterType="Books">
        insert into `books` (bookName,bookCounts,detail)
        values (#{bookName},#{bookCounts},#{detail});
    </insert>

    <delete id="deleteBookById" parameterType="int">
        delete from `books` where bookID = #{bookId};
    </delete>

    <update id="updateBook" parameterType="Books">
        update `books`
        set bookName=#{bookName},bookCounts=#{bookCounts},detail=#{detail}
        where bookID=#{bookID};
    </update>

    <select id="queryBookById" resultType="Books">
        select * from `books` where bookID=#{bookId};
    </select>

    <select id="queryAllBook" resultType="Books">
        select * from `books`;
    </select>

    <select id="queryBookByName" resultType="Books">
        select * from `books` where bookName like #{bookName};
    </select>
</mapper>

BookService.java

public interface BookService {
    public int addBook(Books books);
    public int deleteBookById(int id);
    public int updateBook(Books books);
    public Books queryBookById(int id);
    public List<Books> queryAllBook();
    public List<Books> queryBookByName(String name);
}

BookServiceImpl.java

@Service("BookServiceImpl")
public class BookServiceImpl implements BookService{
    private BookMapper bookMapper;

    public void setBookMapper(BookMapper bookMapper) {
        this.bookMapper = bookMapper;
    }

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

    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();
    }

    public List<Books> queryBookByName(String name) {
        //添加模糊查询标志
        name = "%" + name + "%";
        return bookMapper.queryBookByName(name);
    }
}

mybatis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>
    <!--日志-->
    <settings>
        <setting name="logImpl" value="STDOUT_LOGGING"/>
    </settings>

    <!--别名-->
    <typeAliases>
        <package name="com.lan5th.pojo"/>
    </typeAliases>

    <mappers>
        <mapper class="com.lan5th.dao.BookMapper"/>
    </mappers>
</configuration>

Spring层

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
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd">

    <!--数据库配置文件-->
    <context:property-placeholder location="classpath:database.properties"/>

    <!--连接池
        dbcp:半自动化，不能自动连接
        c3p0:自动化的加载配置文件，可以自动设置到对象中
        druid:整合Springboot使用
        hikari:Springboot默认使用
    -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <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私有属性-->
        <property name="maxPoolSize" value="30"/>
        <property name="minPoolSize" value="10"/>
        <!--关闭链结构不自动commit-->
        <property name="autoCommitOnClose" value="false"/>
        <!--获取链接超时时间-->
        <property name="checkoutTimeout" value="10000"/>
        <!--获取链接失败重试次数-->
        <property name="acquireRetryAttempts" value="2"/>
    </bean>

    <!--sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>

    <!--配置dao接口扫描包，动态实现dao接口注入-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--注意ByName是value而不是ref-->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <property name="basePackage" value="com.lan5th.dao"/>
    </bean>
</beans>

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
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd">

    <!--扫描包-->
    <context:component-scan base-package="com.lan5th.service"/>

    <!--业务类注入，可以使用配置或注解实现，这里使用配置-->
    <bean id="bookServiceImpl" class="com.lan5th.service.BookServiceImpl">
        <property name="bookMapper" ref="bookMapper"/>
    </bean>

    <!--声明式事务配置-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--aop事务支持-->
</beans>

SpringMVC层

web.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">

    <servlet>
        <servlet-name>springmvc</servlet-name>\
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!--需要绑定spring配置文件-->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <!--
    /:匹配所有请求，不包括jsp
    /*:匹配所有请求，包括jsp-->
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!--乱码过滤-->
    <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-->
    <session-config>
        <session-timeout>155</session-timeout>
    </session-config>
</web-app>

springmvc.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:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://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
        https://www.springframework.org/schema/context/spring-context.xsd">

    <!--1.注解驱动-->
    <mvc:annotation-driven/>
    <!--2.静态资源过滤-->
    <mvc:default-servlet-handler/>
    <!--3.扫描包：controller-->
    <context:component-scan base-package="com.lan5th.controller"/>
    <!--4.视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

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
        https://www.springframework.org/schema/beans/spring-beans.xsd">

    <import resource="classpath:spring-dao.xml"/>
    <import resource="classpath:spring-service.xml"/>
    <import resource="springmvc.xml"/>
</beans>

业务实现

BookController.java

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

    //...业务方法
}

查询功能

//查询全部书籍
@RequestMapping("/allBookP")
public String allBook(Model model){
    List<Books> books = bookService.queryAllBook();
    model.addAttribute("books",books);
    return "allBook";
}

全部书籍页面allBook.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>全部书籍</title>
    <!--BootStrap美化界面-->
    <link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
    <div class="row clearfix">
        <div class="col-md-12 column">
            <div class="page-header">
                <h1>
                    <small>书籍列表</small>
                </h1>
            </div>
        </div>
        <div class="col-md-4 column">
            <!--新增书籍-->
            <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/addBookP">新增书籍</a>
        </div>
        <div class="col-md-4 column">
            <span style="color: red">${error}</span>
        </div>
        <div class="col-md-4 column form-inline">
            <!--查询书籍-->
            <form action="${pageContext.request.contextPath}/book/queryBookName" method="post" style="float: right">
                <input type="text" name="bookName" class="form-control" placeholder="请输入查询的书籍名称">
                <input type="submit" value="查询" class="btn btn-primary">
            </form>
        </div>
    </div>
    <div class="row clearfix">
        <div class="col-md-12 column">
            <table class="table table-hover table-striped">
                <thead>
                    <tr>
                        <th>书籍编号</th>
                        <th>书籍名称</th>
                        <th>书籍数量</th>
                        <th>书记详情</th>
                        <th>操作</th>
                    </tr>
                </thead>
                <tbody>
                    <c:forEach var="book" items="${books}">
                        <tr>
                            <td>${book.bookID}</td>
                            <td>${book.bookName}</td>
                            <td>${book.bookCounts}</td>
                            <td>${book.detail}</td>
                            <td>
                                <a href="${pageContext.request.contextPath}/book/updateBookP?id=${book.bookID}" >修改</a>
                                  |  
                                <!--delete方法以RestFul风格编写-->
                                <a href="${pageContext.request.contextPath}/book/deleteBook/${book.bookID}">删除</a>
                            </td>
                        </tr>
                    </c:forEach>
                </tbody>
            </table>
        </div>
    </div>
</div>
</body>
</html>

添加功能

//跳转添加书籍页面
@RequestMapping("/addBookP")
public String addBookPage(Model model){
    return "addBook";
}

//添加书籍业务
@RequestMapping("/addBook")
public String addBook(Books books){
    bookService.addBook(books);
    return "redirect:/book/allBookP";
}

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" %>
<html>
<head>
    <title>修改书籍</title>
    <!--BootStrap美化界面-->
    <link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
    <div class="row clearfix">
        <div class="col-md-12 column">
            <div class="page-header">
                <h1>
                    <small>修改书籍</small>
                </h1>
            </div>
        </div>
    </div>
    <form action="${pageContext.request.contextPath}/book/updateBook" method="post">
        <!--前端需要隐式传递id，否则Controller无法执行updateBook方法-->
        <input type="hidden" name="bookID" value="${book.bookID}">
        <div class="form-group">
            <label for="bkname">书籍名称：</label>
            <input type="text" name="bookName" class="form-control" id="bkname" value="${book.bookName}" required>
        </div>
        <div class="form-group">
            <label for="bkcount">书籍数量：</label>
            <input type="text" name="bookCounts" class="form-control" id="bkcount" value="${book.bookCounts}" required>
        </div>
        <div class="form-group">
            <label for="bkdetail">书籍描述：</label>
            <input type="text" name="detail" class="form-control" id="bkdetail" value="${book.detail}" required>
        </div>
        <div class="form-group">
            <input type="submit" class="form-control" value="修改">
        </div>
    </form>
</div>
</body>
</html>

修改/删除功能

//跳转更新书籍页面
@RequestMapping("/updateBookP")
public String updateBookPage(int id, Model model){
    Books books = bookService.queryBookById(id);
    //给前端传递书原本的属性，以方便修改
    model.addAttribute("book",books);
    return "updateBook";
}

//更新书籍业务
@RequestMapping("/updateBook")
public String updateBook(Books books, Model model){
    bookService.updateBook(books);
    return "redirect:/book/allBookP";
}

//delete方法以RestFul风格编写
@RequestMapping("/deleteBook/{bookId}")
public String deleteBook(@PathVariable("bookId") int id){
    bookService.deleteBookById(id);
    return "redirect:/book/allBookP";
}

更新书籍页面updateBook.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>修改书籍</title>
    <!--BootStrap美化界面-->
    <link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
    <div class="row clearfix">
        <div class="col-md-12 column">
            <div class="page-header">
                <h1>
                    <small>修改书籍</small>
                </h1>
            </div>
        </div>
    </div>
    <form action="${pageContext.request.contextPath}/book/updateBook" method="post">
        <!--前端需要隐式传递id，否则Controller无法执行updateBook方法-->
        <input type="hidden" name="bookID" value="${book.bookID}">
        <div class="form-group">
            <label for="bkname">书籍名称：</label>
            <input type="text" name="bookName" class="form-control" id="bkname" value="${book.bookName}" required>
        </div>
        <div class="form-group">
            <label for="bkcount">书籍数量：</label>
            <input type="text" name="bookCounts" class="form-control" id="bkcount" value="${book.bookCounts}" required>
        </div>
        <div class="form-group">
            <label for="bkdetail">书籍描述：</label>
            <input type="text" name="detail" class="form-control" id="bkdetail" value="${book.detail}" required>
        </div>
        <div class="form-group">
            <input type="submit" class="form-control" value="修改">
        </div>
    </form>
</div>
</body>
</html>

搜索查询功能实现

//按名搜索查询功能实现
@RequestMapping("/queryBookName")
public String queryBookName(String bookName, Model model){
    List<Books> books = null;
    //模糊查询，空字符串查询全部内容
    books = bookService.queryBookByName(bookName);
    //判断列表是否为空，给前端传递错误信息
    if (books.isEmpty()){
        model.addAttribute("error","未查到指定书名!");
    } else {
        model.addAttribute("books",books);
    }
    return "allBook";
}

页面效果展示

首页

全部书籍页面

新增书籍页面

修改书籍页面

查询失败页面

实际排错思路