SSM整合篇

KingsLanding
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SSM整合

依赖

<packaging>war</packaging>

<properties>
    <spring.version>5.3.1</spring.version>
</properties>
<dependencies>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-beans</artifactId>
    <version>${spring.version}</version>
</dependency>
<!--springmvc-->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>${spring.version}</version>
</dependency>

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aspects</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-test</artifactId>
    <version>${spring.version}</version>
</dependency>
<!-- Mybatis核心 -->
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>3.5.7</version>
</dependency>
<!--mybatis和spring的整合包-->
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>2.0.6</version>
</dependency>
<!-- 连接池 -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.0.9</version>
</dependency>
<!-- junit测试 -->
<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.12</version>
    <scope>test</scope>
</dependency>
<!-- MySQL驱动 -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.16</version>
</dependency>
<!-- log4j日志 -->
<dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.17</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.github.pagehelper/pagehelper -->
    <dependency>
        <groupId>com.github.pagehelper</groupId>
        <artifactId>pagehelper</artifactId>
        <version>5.2.0</version>
    </dependency>
    <!-- 日志 -->
    <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-classic</artifactId>
        <version>1.2.3</version>
    </dependency>
    <!-- ServletAPI -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>3.1.0</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.12.1</version>
    </dependency>
    <dependency>
        <groupId>commons-fileupload</groupId>
        <artifactId>commons-fileupload</artifactId>
        <version>1.3.1</version>
    </dependency>
    <!-- Spring5和Thymeleaf整合包 -->
    <dependency>
        <groupId>org.thymeleaf</groupId>
        <artifactId>thymeleaf-spring5</artifactId>
        <version>3.0.12.RELEASE</version>
    </dependency>
</dependencies>

为了能先加载spring的配置文件

Spring提供了监听器ContextLoaderListener，实现ServletContextListener接口，可监听 ServletContext的状态，在web服务器的启动，读取Spring的配置文件，创建Spring的IOC容器。web 应用中必须在web.xml中配置

<!--自定义Spring配置文件的位置和名称-->
<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:Spring.xml</param-value>
</context-param>

<listener>
    <!--
    配置Spring的监听器，在服务器启动时加载Spring的配置文件
    -->
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

web端配置或者说SpringMVC配置web.xml

<servlet>
    <servlet-name>SpringMVC</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--自定义springMVC配置文件的位置-->
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:Spring-mvc.xml</param-value>
    </init-param>
    <!--设置DispatcherServlet初始化在服务器启动时创建-->
    <load-on-startup>1</load-on-startup>

</servlet>
<servlet-mapping>
    <servlet-name>SpringMVC</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

<filter>
    <filter-name>CharacterEncodingFilter</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>
    <init-param>
        <param-name>forceEncoding</param-name>
        <param-value>true</param-value>
    </init-param>
</filter>
<filter-mapping>
    <filter-name>CharacterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

<!--设置处理请求方式的过滤器-->
<filter>
    <filter-name>HiddenHttpMethodFilter</filter-name>
    <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>HiddenHttpMethodFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

spring配置文件

  • 配置SqlSessionFactoryBean 可以直接在spring ioc中获取SqlSessionFactoryBean对象
<context:component-scan base-package="com.spring">
    <!--排除controller注解的组件扫描-->
    <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"></context:exclude-filter>
</context:component-scan>

<!--引入druid.properties文件-->
<context:property-placeholder location="classpath:druid.properties"></context:property-placeholder>
<!--配置数据源-->
<bean id="druidDataSource" class="com.alibaba.druid.pool.DruidDataSource">
    <property name="username" value="${jdbc.username}"></property>
    <property name="password" value="${jdbc.password}"></property>
    <property name="driverClassName" value="${jdbc.driverClass}"></property>
    <property name="url" value="${jdbc.url}"></property>
</bean>

<!--配置事务管理器-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="druidDataSource"></property>
</bean>
<!--
开启事务的注解驱动
将使用注解@Transactional表示的方法或类中的所有方法进行事务管理
-->
<tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven>

<!--配置SqlSessionFactoryBean 可以直接在spring ioc中获取SqlSessionFactoryBean对象-->
<bean class="org.mybatis.spring.SqlSessionFactoryBean">
    <!--设置MyBatis的核心配置文件的路径-->
    <property name="configLocation" value="classpath:mybatis-config.xml"></property>
    <!--设置数据源-->
    <property name="dataSource" ref="druidDataSource"></property>
    <!--设置类型别名所对应的包-->
    <property name="typeAliasesPackage" value="com.spring.pojo"></property>
    <!--设置映射文件的路径，只有映射文件的包和mapper接口的包不一致时需要设置-->
    <!--<property name="mapperLocations" value="classpath:mappers/*.xml"></property>-->
</bean>

<!--
    配置mapper接口的扫描，可以将指定包下所有的mapper接口
    通过SqlSession创建代理实现类对象，并将这些对象交给IOC容器管理
-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="com.spring.mapper"></property>
</bean>

springMVC配置文件

<context:component-scan base-package="com.spring.controller"></context:component-scan>

    <!-- 配置Thymeleaf视图解析器 -->
    <bean id="viewResolver"
          class="org.thymeleaf.spring5.view.ThymeleafViewResolver">
        <property name="order" value="1"/>
        <property name="characterEncoding" value="UTF-8"/>
        <property name="templateEngine">
            <bean class="org.thymeleaf.spring5.SpringTemplateEngine">
                <property name="templateResolver">
                    <bean
                            class="org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver">
                        <!-- 视图前缀 -->
                        <property name="prefix" value="/WEB-INF/templates/"/>
                        <!-- 视图后缀 -->
                        <property name="suffix" value=".html"/>
                        <property name="templateMode" value="HTML5"/>
                        <property name="characterEncoding" value="UTF-8" />
                    </bean>
                </property>
            </bean>
        </property>
    </bean>

    <!--注解驱动-->
    <mvc:annotation-driven/>

    <!--由默认servlet处理静态资源-->
    <mvc:default-servlet-handler/>

    <!--设置初始页面-->
    <mvc:view-controller path="/" view-name="index"></mvc:view-controller>

    <!--文件上传解析器 id固定-->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"></bean>

Mybaties配置文件

  • 大量的配置交给了spring管理
<!--
    MyBatis核心配置文件中，标签的顺序：(不按标签顺序写会报错）
    properties?,settings?,typeAliases?,typeHandlers?,
    objectFactory?,objectWrapperFactory?,reflectorFactory?,
    plugins?,environments?,databaseIdProvider?,mappers?
 -->
<settings>
    <!--将下划线映射为驼峰原则；将字段名中的下划线自动转换为驼峰命名的属性名-->
    <setting name="mapUnderscoreToCamelCase" value="true"/>
</settings>

<!--配置分页插件-->
<plugins>
<plugin interceptor="com.github.pagehelper.PageInterceptor"></plugin>
</plugins>

分页功能

接口

MassageMapper

/**
 * Created by KingsLanding on 2022/8/8 14:33
 */
public interface MassageMapper {
    /**
     * 获取所有信息
     * @return
     */
    List<Massage> getAllMassage();

}

Mybaties映射文件MassageMapper.xml

<?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接口的全类名和映射文件的命名空间（namespace）保持一致-->
<mapper namespace="com.spring.mapper.MassageMapper">

    <!--List<Massage> getAllMassage();-->
    <select id="getAllMassage" resultType="Massage">
        <!--分页的时候要注意，因为分页插件会自动在语句后面拼接limt ？语句所以不能加;-->
        select * from massage
    </select>

</mapper>

MassageService

/**
 * Created by KingsLanding on 2022/8/8 17:07
 */
public interface MassageService {

    PageInfo<Massage> getAllMassageData(Integer pageNum);
}

MassageServiceImpl

/**
 * Created by KingsLanding on 2022/8/8 14:16
 */
@Service
public class MassageServiceImpl implements MassageService{

    @Autowired
    private MassageMapper massageMapper;
    @Override
    public PageInfo<Massage> getAllMassageData(Integer pageNum){
        PageHelper.startPage(pageNum,4);
        List<Massage> massageList = massageMapper.getAllMassage();
        PageInfo<Massage> pageInfo = new PageInfo<>(massageList, 5);
        return pageInfo;
    }
}

MassageController

/**
 * Created by KingsLanding on 2022/8/8 14:15
 */
@Controller
public class MassageController {

    @Autowired
    private MassageService massageService;

    @RequestMapping(
            value = "/query/{page}",
            method = RequestMethod.GET
    )
    public String getAllMassage(Model model, @PathVariable("page") Integer page){
        PageInfo<Massage> pageInfo = massageService.getAllMassageData(page);
        model.addAttribute("pageInfo",pageInfo);
        return "success";
    }
}

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" th:href="@{/static/css/index_work.css}">
</head>
<body>
<table>
    <tr>
        <th colspan="5">Employee Info</th>
    </tr>
    <tr>
        <th>id</th>
        <th>name</th>
        <th>age</th>
        <th>phone</th>
        <th>操作</th>
    </tr>
    <tr th:each="massage : ${pageInfo.list}">
        <td th:text="${massage.id}"></td>
        <td th:text="${massage.name}"></td>
        <td th:text="${massage.age}"></td>
        <td th:text="${massage.phone}"></td>

        <td>
            <a href="">delete</a>
            <a href="">update</a>
        </td>
    </tr>
</table>

<div style="text-align: center;">
    <a th:if="${pageInfo.hasPreviousPage}" th:href="@{/query/1}">首页</a>
    <a th:if="${pageInfo.hasPreviousPage}" th:href="@{'/query/'+${pageInfo.prePage}}">上一页</a>
    <span th:each="num : ${pageInfo.navigatepageNums}">
        <a th:if="${pageInfo.pageNum == num}" style="color: red;" th:href="@{'/query/'+${num}}" th:text="'['+${num}+']'"></a>
        <a th:if="${pageInfo.pageNum != num}" th:href="@{'/query/'+${num}}" th:text="${num}"></a>
    </span>
    <a th:if="${pageInfo.hasNextPage}" th:href="@{'/query/'+${pageInfo.nextPage}}">下一页</a>
    <a th:if="${pageInfo.hasNextPage}" th:href="@{'/query/'+${pageInfo.pages}}">末页</a>
</div>
</body>
</html>
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