SSM整合

、SSM整合

4.1ContextLoaderListener

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

<listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring.xml</param-value>
    </context-param>

4.2准备工作

1.创建Maven Module

2.导入依赖

<dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.3.8</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>5.3.8</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>5.3.8</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.8</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.3.2</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>5.2.15.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.3.8</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>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.2.4</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.10</version>
        </dependency>

        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>

        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>5.2.0</version>
        </dependency>

        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.2.3</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.1</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.12.3</version>
        </dependency>

        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.3</version>
        </dependency>

        <dependency>
            <groupId>org.thymeleaf</groupId>
            <artifactId>thymeleaf-spring5</artifactId>
            <version>3.0.11.RELEASE</version>
        </dependency>
    </dependencies>

3.创建表

在这里插入图片描述

4.3配置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">


    <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>

    <!--处理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>

    <!--配置前端控制器-->
    <servlet>
        <servlet-name>SpringMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!--配置SpringMVC配置文件自定义的位置和名称-->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:SpringMVC.xml</param-value>
        </init-param>
        <!--将DispatcherServlet的初始化时间提前到服务器启动时-->
        <load-on-startup>1</load-on-startup>
    </servlet>

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

    <!--配置Spring的监听器在服务器启动四加载Spring的配置文件-->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

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

</web-app>

4.4创建SpringMVC的配置文件并配置

1.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: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-4.2.xsd
    http://www.springframework.org/schema/mvc
    http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-4.2.xsd">

    <!--扫描组件-->
    <context:component-scan base-package="com.ssm.Controller"/>

    <!--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>

    <!--配置默认的Servlet处理静态资源-->
    <mvc:annotation-driven/>
    <!--开启mvc的注解驱动-->
    <mvc:default-servlet-handler/>
    <!--配置视图解析器-->
    <mvc:view-controller path="/" view-name="index"></mvc:view-controller>

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

    <!--拦截器-->
    <mvc:interceptors>
        <bean class="com.ssm.Interceptor.FirstInterceptor"/>
    </mvc:interceptors>

    <!--异常解析器-->

    <bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
        <property name="exceptionMappings">
            <props>
    <!--&lt;!&ndash;key设置要处理的异常,value设置出现该异常时需要跳转的页面所对应的逻辑视图&ndash;&gt;-->
                <prop key="java.lang.ArithmeticException">error</prop>
            </props>
        </property>
    <!--&lt;!&ndash;设置共享在请求域中的异常信息的属性名&ndash;&gt;-->
        <property name="exceptionAttribute" value="ex"></property>
    </bean>
</beans>

4.5搭建MyBatis环境

1.创建属性文件jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssm?characterEncoding=utf8
jdbc.username=root
jdbc.password=123456

2.创建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>


    <!--将下划线映射为驼峰-->
    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
    </settings>

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

</configuration>

3创建Mapper接口和映射文件

<?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.ssm.Mapper.EmployeeMapper">

</mapper>
package com.ssm.Mapper;

public interface EmployeeMapper {
    
}

4.创建日志文件log4j.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

    <appender name="STDOUT" class="org.apache.log4j.ConsoleAppender">
        <param name="Encoding" value="UTF-8"/>
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%-5d %d{MM-dd HH:mm:ss,SSS} %m (%F:%L) \n"/>
        </layout>
    </appender>

    <logger name="java.sql">
        <level value="debug"/>
    </logger>
    <logger name="org.apache.ibatis" >
        <level value="info"/>
    </logger>

    <!-- 默认配置,级别为debug 且根据name为log.console和 log.file两个appender输出-->
    <root>
        <level value="debug"/>
        <appender-ref ref="STDOUT"/>
    </root>
</log4j:configuration>

4.6创建Spring的配置文件并配置

<?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-4.2.xsd
    http://www.springframework.org/schema/mvc
    http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-4.2.xsd">


    <!--扫描组件(排除控制层)-->
    <context:component-scan base-package="com.ssm">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <!--引入jdbc.properties-->
    <context:property-placeholder location="classpath:jdbc.properties"></context:property-placeholder>

    <!--配置数据源-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>


    <!--配置SqlSessionFactoryBean,可以i直接在Spring的IOC中获取SqlSessionFactory-->
    <bean class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--设置MyBatis的核心配置文件-->
        <property name="configLocation" value="classpath:mybatis-config.xml"></property>
        <!--设置数据源-->
        <property name="dataSource" ref="dataSource"></property>
        <!--设置类型别名所对应的包-->
        <property name="typeAliasesPackage" value="com.ssm.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:com.ssm.Mapper/*.xml"></property>

        <!--配置分页插件-->
        <!--<property name="plugins">-->
            <!--<array>-->
                <!--<bean class="com.github.pagehelper.PageInterceptor"></bean>-->
            <!--</array>-->
        <!--</property>-->


    </bean>

    <!--配置mapper接口的扫描,可以将指定报下所有的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.ssm.Mapper"></property>
    </bean>

</beans>

4.7测试功能

1.创建组件

/*
    查询所有的员工信息--->/employee--->get
    根据id查询员工信息-->/employee/1-->get
    跳转到添加页面--->/to/add--->get
    添加员工信息--->/employee--->post
    修改员工信息--->/employee--->put
    删除员工信息--->/employee/1-->delete
 */
@Service
@Transactional
public class EmployeeServiceIml implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    public List<Employee> getAllEmployee() {
        return employeeMapper.getAllEmployee();
    }

    public void deleteIdEmployee(Integer empId) {
        employeeMapper.deleteIdEmployee(empId);
    }

    public PageInfo<Employee> getEmployeePage(Integer pageNum) {
        //开启分页功能
        PageHelper.startPage(pageNum,4);
        //查询所有员工信息
        List<Employee> list=employeeMapper.getAllEmployee();
        //获取分页相关数据
        PageInfo<Employee> pageInfo=new PageInfo<Employee>(list,5);
        return pageInfo;
    }
}

2.创建页面

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>员工分页列表</title>
</head>
<body>

<table id="dataTable" border="1" cellspacing="0" cellpadding="0" style="text-align: center;">
    <tr>
        <th colspan="6">员工列表</th>
    </tr>
    <tr>
        <th>流水号</th>
        <th>员工姓名</th>
        <th>年龄</th>
        <th>性别</th>
        <th>邮箱</th>
        <th>操作</th>
    </tr>
    <tr th:each="employee,status:${page.list}">
        <td th:text="${status.count}"></td>
        <td th:text="${employee.empName}"></td>
        <td th:text="${employee.age}"></td>
        <td th:text="${employee.sex}"></td>
        <td th:text="${employee.email}"></td>
        <td>
            <a th:href="@{'/employee/'+${employee.empId}}">删除</a>
            <a th:href="@{'/employee/'+${employee.empId}}">修改</a>
        </td>
    </tr>
</table>


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

</body>
</html>

3.访问测试分页功能

@Controller
public class EmployeeController {


    @Autowired
    private EmployeeService employeeService;

    //查询所有员工信息
    @RequestMapping(value = "/employee",method = RequestMethod.GET)
    public String getAllEmployee(Model model){
        List<Employee> list=employeeService.getAllEmployee();
        model.addAttribute("list",list);
        return "employee_list";
    }

    //根据id删除员工信息
    @RequestMapping(value = "/employee/{empId}",method = RequestMethod.DELETE)
    public  String deleteEmployee(@PathVariable("empId")Integer empId){
        employeeService.deleteIdEmployee(empId);
        return "redirect:/employee";
    }
//分页查询
    @RequestMapping(value = "/employee/page/{pageNum}",method = RequestMethod.GET)
    public String getEmployeePage(@PathVariable("pageNum") Integer pageNum,Model model){
        PageInfo<Employee> pageInfo=employeeService.getEmployeePage(pageNum);
        //将分页数据共享在请求域中共享
        model.addAttribute("page",pageInfo);
        return "/employee_pageInfo";
    }
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