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  • 论文笔记
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  • SpringBoot2

  • JavaWeb

  • SSM

    • Spring

      • 一、Spring简介
      • 二、IOC
      • 三、AOP
      • 四、声明式事务
      • Srping学习简笔
    • Mybatis

    • SpringMVC

    • SSM整合
      • 4.1、ContextLoaderListener
      • 4.2、准备工作
        • ①创建Maven Module
        • ②导入依赖
        • ③创建表
      • 4.3、配置web.xml
      • 4.4、创建SpringMVC的配置文件并配置
      • 4.5、搭建MyBatis环境
        • ①创建属性文件jdbc.properties
        • ②创建MyBatis的核心配置文件mybatis-config.xml
        • ③创建Mapper接口和映射文件
        • ④创建日志文件log4j.xml
      • 4.6、创建Spring的配置文件并配置
      • 4.7、测试功能
        • ①创建组件
        • ②创建页面
        • ③访问测试分页功能
  • SpringBoot3

  • 技术
  • SSM
yangzhixuan
2023-05-06
目录

SSM整合

# 4.1、ContextLoaderListener

之所以使用监听器而不是过滤器是因为我们的IOC容器只需要在初始化的时候创建一次,不需要在运行的时候多次创建,而过滤器会对每次的请求都做判断,因此这里使用监听器即可;且监听器创建比DispatchServlet初始化要早

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

监听器ContextLoaderListener中有创建IOC容器的代码

<listener>
    <!--
        配置Spring的监听器,在服务器启动时加载Spring的配置文件
        Spring配置文件默认位置和名称:/WEB-INF/applicationContext.xml
        可通过上下文参数自定义Spring配置文件的位置和名称
    -->
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--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>
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# 4.2、准备工作

# ①创建Maven Module

# ②导入依赖

<packaging>war</packaging>
<!--自定义属性,设置spring版本号-->
<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>
    <!--事务管理器在jdbc中-->
    <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> 
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# ③创建表

CREATE TABLE `t_emp` (
    `emp_id` int(11) NOT NULL AUTO_INCREMENT,
    `emp_name` varchar(20) DEFAULT NULL,
    `age` int(11) DEFAULT NULL,
    `sex` char(1) DEFAULT NULL,
    `email` varchar(50) DEFAULT NULL,
    PRIMARY KEY (`emp_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
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# 4.3、配置web.xml

<!-- 配置Spring的编码过滤器 -->
<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>
<!-- 配置处理请求方式PUT和DELETE的过滤器 -->
<filter>
    <filter-name>HiddenHttpMethodFilter</filter-name>
    <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filterclass>
</filter>
<filter-mapping>
    <filter-name>HiddenHttpMethodFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>
<!-- 配置SpringMVC的前端控制器 -->
<servlet>
    <servlet-name>DispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servletclass>
    <!-- 设置SpringMVC的配置文件的位置和名称 -->
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:SpringMVC.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>
<!-- 设置Spring的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>
<!-- 配置Spring的监听器 -->
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
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# 4.4、创建SpringMVC的配置文件并配置

<!--扫描组件-->
<context:component-scan base-package="com.atguigu.ssm.controller">
</context:component-scan>
<!--配置视图解析器-->
<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>
<!-- 配置访问首页的视图控制 -->
<mvc:view-controller path="/" view-name="index"></mvc:view-controller>
<!-- 配置默认的servlet处理静态资源,当DispatchServlet处理不了某些请求时将交给默认Servlet处理-->
<mvc:default-servlet-handler />
<!-- 开启MVC的注解驱动,开启之后将首先使用DispatchServlet处理请求-->
<mvc:annotation-driven />

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

<!--配置拦截器(需要就配置)-->

<!--配置异常解析器(需要就配置)-->

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# 4.5、搭建MyBatis环境

# ①创建属性文件jdbc.properties

jdbc.user=root
jdbc.password=atguigu
jdbc.url=jdbc:mysql://localhost:3306/ssm?serverTimezone=UTC
jdbc.driver=com.mysql.cj.jdbc.Driver
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# ②创建MyBatis的核心配置文件mybatis-config.xml

核心配置文件中的配置都可以交给spring进行管理,即在spring.xml中SqlSessionFactoryBean的属性中进行设置

<?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>
    <settings>
        <!--将下划线映射为驼峰-->
        <setting name="mapUnderscoreToCamelCase" value="true"/>
    </settings>
    <plugins>
        <!--配置分页插件-->
        <plugin interceptor="com.github.pagehelper.PageInterceptor"></plugin>
    </plugins>
</configuration>
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# ③创建Mapper接口和映射文件

public interface EmployeeMapper {
List<Employee> getEmployeeList();
}
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<?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.atguigu.ssm.mapper.EmployeeMapper">
    <select id="getEmployeeList" resultType="Employee">
        select * from t_emp
    </select>
</mapper>
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# 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="%-5p %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>
    <root>
        <level value="debug" />
        <appender-ref ref="STDOUT" />
    </root>
</log4j:configuration>
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# 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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                           http://www.springframework.org/schema/beans/spring-beans.xsd
                           http://www.springframework.org/schema/context
                           https://www.springframework.org/schema/context/spring-context.xsd">
    <!--扫描组件-->
    <context:component-scan base-package="com.atguigu.ssm">
        <!--通过注解的方式进行排除,会将带有该注解的所有类进行排除-->
        <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Druid数据源 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"></property>
        <property name="url" value="${jdbc.url}"></property>
        <property name="username" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>
    <!-- 配置用于创建SqlSessionFactory的工厂bean,可以直接在Spring的IOC中获取SqlSessionFactory-->
    
    <!--配置事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

    <!--
        开启事务的注解驱动
        将使用注解@Transactional标识的方法或类中的所有的方法进行事务管理
    -->
    <tx:annotation-driven transaction-manager="transactionManager"/>
    
    <bean class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 设置MyBatis配置文件的路径(可以不设置) -->
        <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.atguigu.ssm.pojo">
        </property>
        <!--
            设置映射文件的路径
            若映射文件所在路径和mapper接口所在路径一致,则不需要设置
        -->
        <!--
            <property name="mapperLocations" value="classpath:mapper/*.xml">
            </property>
        -->
    </bean>
    <!--
        配置mapper接口的扫描配置
        由mybatis-spring提供,可以将指定包下所有的mapper接口创建动态代理
        并将这些动态代理作为IOC容器的bean管理
		配置了这个的话会同时根据设置的包名查找mapper接口和mapper映射文件
    -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.atguigu.ssm.mapper"></property>
    </bean>
</beans>
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# 4.7、测试功能

# ①创建组件

实体类Employee

public class Employee {
    private Integer empId;
    private String empName;
    private Integer age;
    private String sex;
    private String email;
    public Employee() {
    }
    public Employee(Integer empId, String empName, Integer age, String sex,
                    String email) {
        this.empId = empId;
        this.empName = empName;
        this.age = age;
        this.sex = sex;
        this.email = email;
    }
    public Integer getEmpId() {
        return empId;
    }
    public void setEmpId(Integer empId) {
        this.empId = empId;
    }
    public String getEmpName() {
        return empName;
    }
    public void setEmpName(String empName) {
        this.empName = empName;
    }
    public Integer getAge() {
        return age;
    }
    public void setAge(Integer age) {
        this.age = age;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
}
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创建控制层组件EmployeeController

@Controller
public class EmployeeController {
    @Autowired
    private EmployeeService employeeService;
    @RequestMapping(value = "/employee/page/{pageNum}", method = RequestMethod.GET)
    public String getEmployeeList(Model model, @PathVariable("pageNum") Integer pageNum){
        PageInfo<Employee> page = employeeService.getEmployeeList(pageNum);
        model.addAttribute("page", page);
        return "employee_list";
    }
}
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创建接口EmployeeService

public interface EmployeeService {
	PageInfo<Employee> getEmployeeList(Integer pageNum);
}
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创建实现类EmployeeServiceImpl

@Service
public class EmployeeServiceImpl implements EmployeeService {
    @Autowired
    private EmployeeMapper employeeMapper;
    @Override
    public PageInfo<Employee> getEmployeeList(Integer pageNum) {
        PageHelper.startPage(pageNum, 4);
        List<Employee> list = employeeMapper.getEmployeeList();
        PageInfo<Employee> page = new PageInfo<>(list, 5);
        return page;
    }
}
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# ②创建页面

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
    <head>
        <meta charset="UTF-8">
        <title>Employee Info</title>
        <link rel="stylesheet" th:href="@{/static/css/index_work.css}">
    </head>
    <body>
        <table>
            <tr>
                <th colspan="6">Employee Info</th>
            </tr>
            <tr>
                <th>emp_id</th>
                <th>emp_name</th>
                <th>age</th>
                <th>sex</th>
                <th>email</th>
                <th>options</th>
            </tr>
            <tr th:each="employee : ${page.list}">
                <td th:text="${employee.empId}"></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 href="">delete</a>
                    <a href="">update</a>
                </td>
            </tr>
            <tr>
                <td colspan="6">
                    <span th:if="${page.hasPreviousPage}">
                        <a th:href="@{/employee/page/1}">首页</a>
                        <a th:href="@{'/employee/page/'+${page.prePage}}">上一页</a>
                    </span>
                    <span th:each="num : ${page.navigatepageNums}">
                        <a th:if="${page.pageNum==num}"
                           th:href="@{'/employee/page/'+${num}}" th:text="'['+${num}+']'" style="color:red;"></a>
                        <a th:if="${page.pageNum!=num}"
                           th:href="@{'/employee/page/'+${num}}" th:text="${num} "></a>
                    </span>
                    <span th:if="${page.hasNextPage}">
                        <a th:href="@{'/employee/page/'+${page.nextPage}}">下一页</a>
                        <a th:href="@{'/employee/page/'+${page.pages}}">末页</a>
                    </span>
                </td>
            </tr>
        </table>
    </body>
</html>
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# ③访问测试分页功能

**url:**localhost:8080/employee/page/1

controller方法:

@RequestMapping(value = "/employee", method = RequestMethod.GET)
public String getAllEmployee(Model model) {
    List<Employee> list = employeeService.getAllEmployee();
    model.addAttribute("list", list);
    return "employee_list";
}
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service方法:

public PageInfo<Employee> getEmployeePage(Integer pageNum) {
    //开启分页功能
    PageHelper.startPage(pageNum, 4);
    //查询所有数据,这里实际上并没有查询所有数据,因为分页插件是一个拦截器,它会帮助我们加上limit,从而获取相应的部分数据
    List<Employee> list = employeeMapper.getAllEmployee();
    //获取分页相关数据,这里的5代表分页栏显示几条页码
    PageInfo<Employee> page = new PageInfo<Employee>(list, 5);
    return page;
}
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编辑 (opens new window)
上次更新: 2024/05/30, 07:49:34
其他知识点
一、SpringBoot3快速入门

← 其他知识点 一、SpringBoot3快速入门→

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