简易记事本后端-SSM项目框架搭建

SSM框架简介

SSM框架是指Spring、Spring MVC和MyBatis这三个开源框架的整合使用，主要用于Java
Web应用程序的开发。
标准的SSM框架有四层，分别为dao层（mapper）、service层、controller层和view层
其中Spring主要实现业务对象管理，SpringMVC主要负责请求的转发和视图管理，MyBatis主要负责数据持久化

基础环境准备

MySQL 8.0
JDK 17
Tomcat 10.1.28
Maven 3.8.1
开发工具：IDEA

项目搭建

1. 新建maven项目，并选择webapp模版

2. 项目结构

4.pom文件

xml 复制代码

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.jyh</groupId>
  <artifactId>lifeDrips365</artifactId>
  <packaging>war</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>lifeDrips365 Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <properties>
    <maven.compiler.source>17</maven.compiler.source>
    <maven.compiler.target>17</maven.compiler.target>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
    <!-- mybatis -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.5.16</version>
    </dependency>
    <!-- mysql -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.33</version>
    </dependency>
    <!-- springMVC -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>6.1.12</version>
    </dependency>
    <!-- mybatis-spring -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>3.0.3</version>
    </dependency>
    <!-- spring-jdbc -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>6.1.12</version>
    </dependency>
    <!-- lombok -->
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.18.34</version>
    </dependency>
    <!-- jackson -->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.17.2</version>
    </dependency>
    <!-- pagehelper -->
    <dependency>
      <groupId>com.github.pagehelper</groupId>
      <artifactId>pagehelper</artifactId>
      <version>6.1.0</version>
    </dependency>
    <!-- druid -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.2.23</version>
    </dependency>
    <!-- validation -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-validation</artifactId>
      <version>3.3.0</version>
    </dependency>
     <!-- Jakarta Servlet -->
    <dependency>
      <groupId>jakarta.servlet</groupId>
      <artifactId>jakarta.servlet-api</artifactId>
      <version>6.0.0</version>
      <scope>provided</scope>
    </dependency>
  </dependencies>

  <build>
    <finalName>lifeDrips365</finalName>
  </build>

</project>

3.配置文件

db.properties

db.properties 文件用于存储数据库连接配置，如URL、用户名和密码，以实现配置的集中管理、环境隔离和安全性提升

bash 复制代码

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/demo6?characterEncoding=UTF-8&serverTimezone=Asia/Shanghai&useSSL=false&allowPublicKeyRetrieval=true
jdbc.username=root
jdbc.password=123456

springmvc.xml

xml 复制代码

<?xml version="1.0" encoding="UTF-8" ?>
<!-- 定义Spring IoC容器的配置文件 -->
<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/context http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
        ">
    <!-- 扫描指定的基础包，自动检测包中的@Component、@Service、@Repository和@Controller注解 -->
    <context:component-scan base-package="com.jyh"/>
    <!-- 启用Spring MVC的注解驱动，自动配置数据绑定、JSON转换等功能 -->
    <mvc:annotation-driven/>

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <mvc:default-servlet-handler/>

</beans>

spring-mybatis.xml

xml 复制代码

<?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/context http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
        ">
    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="location" value="classpath:db.properties"/>
    </bean>
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" destroy-method="close">
        <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>
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="mapperLocations" value="classpath:mapper/*.xml"/>
        <property name="typeAliasesPackage" value="com.jyh.domain.entity"/>
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.jyh.mapper"/>
    </bean>

</beans>

mybatis-config.xml

xml 复制代码

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "https://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <settings>
        <setting name="logImpl" value="STDOUT_LOGGING"/>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
        <setting name="useGeneratedKeys" value="true"/>
        <setting name="autoMappingBehavior" value="FULL"/>
    </settings>
    <plugins>
        <plugin interceptor="com.github.pagehelper.PageInterceptor">
            <property name="helperDialect" value="mysql"/>
        </plugin>

    </plugins>
</configuration>

web.xml

java 复制代码

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee">


  <display-name>Archetype Created Web Application</display-name>

  <servlet>
    <servlet-name>ssm</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springmvc.xml, classpath:spring-mybatis.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>

    <multipart-config>
      <max-file-size>10485760</max-file-size>
      <max-request-size>10485760</max-request-size>
      <file-size-threshold>0</file-size-threshold>
    </multipart-config>
  </servlet>
  <servlet-mapping>
    <servlet-name>ssm</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

</web-app>