SSM集成Thymeleaf

• 创建项目
• Spring+SpringMVC+MyBatis的配置文件
• 数据库内容
• dao层+service层+controller层
• 映射文件
• 前端简单页面
• 配置tomcat，运行显示
• 总体项目架构
• 补充

目前很多后端技术栈采用Spring+SpringMVC+MyBatis的项目,其模板引擎大多使用JSP。基于现在前后端分离趋势，我们使用Thymeleaf这个模板引擎和SSM框架配合。但是Thymeleaf不算是真正意义上的前后端分离。

1. 创建一个maven项目，在例子中，我们创建一个名为SSMAndThymeleaf的项目。

2. 引入全部依赖

   <?xml version="1.0" encoding="UTF-8"?>
   <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/xsd/maven-4.0.0.xsd">
       <modelVersion>4.0.0</modelVersion>
       <groupId>com.wang</groupId>
       <artifactId>SSMAndThymeleaf</artifactId>
       <version>1.0-SNAPSHOT</version>
       <properties>
           <maven.compiler.source>8</maven.compiler.source>
           <maven.compiler.target>8</maven.compiler.target>
       </properties>
       <dependencies>
           <!--导入spring,下面几个为spring和springmvc需要的依赖-->
           <dependency>
               <groupId>org.springframework</groupId>
               <artifactId>spring-context</artifactId>
               <version>5.1.9.RELEASE</version>
           </dependency>
           <dependency>
               <groupId>org.springframework</groupId>
               <artifactId>spring-jdbc</artifactId>
               <version>5.1.9.RELEASE</version>
           </dependency>
           <dependency>
               <groupId>org.springframework</groupId>
               <artifactId>spring-aop</artifactId>
               <version>5.1.9.RELEASE</version>
           </dependency>
           <dependency>
               <groupId>org.springframework</groupId>
               <artifactId>spring-core</artifactId>
               <version>5.1.9.RELEASE</version>
           </dependency>
           <dependency>
               <groupId>org.springframework</groupId>
               <artifactId>spring-tx</artifactId>
               <version>5.1.9.RELEASE</version>
           </dependency>
           <dependency>
               <groupId>org.aspectj</groupId>
               <artifactId>aspectjweaver</artifactId>
               <version>1.9.4</version>
           </dependency>
           <dependency>
               <groupId>org.springframework</groupId>
               <artifactId>spring-beans</artifactId>
               <version>5.1.9.RELEASE</version>
           </dependency>
           <!--导入springmvc-->
           <dependency>
               <groupId>org.springframework</groupId>
               <artifactId>spring-web</artifactId>
               <version>5.1.9.RELEASE</version>
           </dependency>
           <dependency>
               <groupId>org.springframework</groupId>
               <artifactId>spring-webmvc</artifactId>
               <version>5.1.9.RELEASE</version>
           </dependency>
   
           <!--导入mybatis-->
           <dependency>
               <groupId>org.mybatis</groupId>
               <artifactId>mybatis-spring</artifactId>
               <version>1.3.2</version>
           </dependency>
           <dependency>
               <groupId>org.mybatis</groupId>
               <artifactId>mybatis</artifactId>
               <version>3.5.2</version>
           </dependency>
     <!--mysql数据库的依赖-->
           <dependency>
               <groupId>mysql</groupId>
               <artifactId>mysql-connector-java</artifactId>
               <version>8.0.17</version>
           </dependency>
     <!-- 例子中使用的数据库连接池是C3P0,当然，你也可以选择Druid数据库连接池-->
           <dependency>
               <groupId>com.mchange</groupId>
               <artifactId>c3p0</artifactId>
               <version>0.9.5.2</version>
           </dependency>
   
           <!--导入Thymeleaf模板引擎 -->
           <dependency>
               <groupId>org.thymeleaf</groupId>
               <artifactId>thymeleaf-spring5</artifactId>
               <version>3.0.9.RELEASE</version>
           </dependency>
           <!-- servlet api-->
           <dependency>
               <groupId>javax.servlet</groupId>
               <artifactId>javax.servlet-api</artifactId>
               <version>4.0.0</version>
               <scope>provided</scope>
           </dependency>
           <dependency>
               <groupId>org.thymeleaf</groupId>
               <artifactId>thymeleaf</artifactId>
               <version>3.0.11.RELEASE</version>
           </dependency>
   
           <!--导入jackson注解-->
           <dependency>
               <groupId>com.fasterxml.jackson.core</groupId>
               <artifactId>jackson-core</artifactId>
               <version>2.9.8</version>
           </dependency>
           <dependency>
               <groupId>com.fasterxml.jackson.core</groupId>
               <artifactId>jackson-databind</artifactId>
               <version>2.9.8</version>
           </dependency>
           <dependency>
               <groupId>com.fasterxml.jackson.core</groupId>
               <artifactId>jackson-annotations</artifactId>
               <version>2.9.8</version>
           </dependency>
       </dependencies>
   </project>
   

3. 为项目添加web框架支持。

1. Spring的配置文件

   主要是扫描数据持久层和业务层，然后数据库的相关配置。

   <?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:aop="http://www.springframework.org/schema/aop"
          xmlns:tx="http://www.springframework.org/schema/tx"
          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/aop
           http://www.springframework.org/schema/aop/spring-aop.xsd
           http://www.springframework.org/schema/tx
           http://www.springframework.org/schema/tx/spring-tx.xsd">
   
       <!--扫描dao层-->
       <context:component-scan base-package="com.wang.dao"/>
       <context:component-scan base-package="com.wang.service"/>
   
       <!--加载properties文件,这里的properties文件是数据源配置需要的内容-->
       <context:property-placeholder location="classpath:properties/db.properties"/>
   
       <!--配置数据源-->
       <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}"/>
           <!-- 初始连接池大小 -->
           <property name="initialPoolSize" value="10"/>
           <!-- 连接池中连接最小个数 -->
           <property name="minPoolSize" value="5"/>
           <property name="maxPoolSize" value="20"/>
       </bean>
   
       <!--配置SqlSession工厂对象,MyBatis配置SqlSessionFactory,Spring中将它封装成了一个Bean-->
       <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
           <property name="dataSource" ref="dataSource"/>
           <!--MyBatis配置文件的位置-->
           <property name="configLocation" value="classpath:mybatis/mybatis-SqlMapConfig.xml"/>
           <!--MyBatis映射文件的位置-->
           <property name="mapperLocations" value="classpath*:mapper/*Dao.xml"/>
       </bean>
   
       <!--加载dao的接口对象,这一配置是为了让他能通过反射创建mapper对象-->
       <bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
           <property name="basePackage" value="com.wang.dao"/>
           <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
       </bean>
   </beans>
   

2. SpringMVC的配置文件

   <?xml version="1.0" encoding="UTF-8"?>
   <beans xmlns="http://www.springframework.org/schema/beans"
          xmlns:mvc="http://www.springframework.org/schema/mvc"
          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/mvc
           https://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
   
       <!--扫描controller层注解-->
       <context:component-scan base-package="com.wang"/>
    
       <!--配置模板引擎-->
       <bean id="springResourceTemplateResolver" class="org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver">
           <property name="prefix" value="/WEB-INF/templates/"/>
           <property name="suffix" value=".html"/>
           <!--解决页面的中文乱码-->
           <property name="characterEncoding" value="UTF-8"/>
           <property name="order" value="1"/>
           <property name="templateMode" value="HTML5"/>
           <property name="cacheable" value="false"/>
       </bean>
       <bean id="springTemplateEngine" class="org.thymeleaf.spring5.SpringTemplateEngine">
           <property name="templateResolver" ref="springResourceTemplateResolver"/>
       </bean>
       
    <!-- 配置thymeleaf视图解析器 -->
       <bean id="thymeleafViewResolver" class="org.thymeleaf.spring5.view.ThymeleafViewResolver">
           <property name="templateEngine" ref="springTemplateEngine"/>
           <property name="characterEncoding" value="UTF-8"/>
       </bean>
   
    <!--开启注解驱动-->
       <mvc:annotation-driven />
   </beans>
   

3. MyBatis的配置文件

   其实MyBatis的配置在Spring中都已经配置完，即使我们使用事务，也是使用Spring的事务处理，所以这里只需要配置一点点东西。

   <?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>
       <!--扫描pojo对象,起个别名-->
       <typeAliases>
           <package name="com.wang.model"/>
       </typeAliases>
   </configuration>
   

1. 创建一个实体类(Country)

   package com.wang.model;
   
   /**
    * @author wya
    * @version 1.0
    * @school hhu
    * @date 2022/3/21 19:10
    */
   public class Country {
       private Integer id;
       
       private String countryName;
       
       private String countryCode;
       
       public Integer getId() {
           return id;
       }
   
       public void setId(Integer id) {
           this.id = id;
       }
   
       public String getCountryName() {
           return countryName;
       }
   
       public void setCountryName(String countryName) {
           this.countryName = countryName;
       }
   
       public String getCountryCode() {
           return countryCode;
       }
   
       public void setCountryCode(String countryCode) {
           this.countryCode = countryCode;
       }
   
   }
   

2. 创建dao接口

   import com.wang.model.Country;
   import org.apache.ibatis.annotations.Param;
   import org.springframework.stereotype.Repository;
   
   /**
    * @author wya
    * @version 1.0
    * @school hhu
    * @date 2022/3/21 19:11
    */
   @Repository
   public interface CountryDao {
       
       Country selectACountry(@Param("countryId")int id);
   
   }
   

3. 创建service接口

   package com.wang.service;
   
   import com.wang.model.Country;
   
   /**
    * @author wya
    * @version 1.0
    * @school hhu
    * @date 2022/3/21 19:11
    */
   public interface CountryService {
   
       Country getCountryById(int id);
   
   }
   

4. 实现service接口

   package com.wang.service.impl;
   
   import com.wang.dao.CountryDao;
   import com.wang.model.Country;
   import com.wang.service.CountryService;
   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.stereotype.Service;
   
   /**
    * @author wya
    * @version 1.0
    * @school hhu
    * @date 2022/3/21 19:11
    */
   @Service
   public class CountryServiceImpl implements CountryService {
   
       @Autowired
       CountryDao countryDao;
   
       @Override
       public Country getCountryById(int id) {
           /**
            * 这里是业务层的操作，我们这里省略
            */
           return countryDao.selectACountry(id);
       }
   }
   
   

5. 创建controller

   package com.wang.controller;
   
   import com.wang.model.Country;
   import com.wang.service.CountryService;
   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.stereotype.Controller;
   import org.springframework.ui.Model;
   import org.springframework.web.bind.annotation.RequestMapping;
   
   /**
    * @author wya
    * @version 1.0
    * @school hhu
    * @date 2022/3/21 19:09
    */
   @Controller
   public class CountryController {
   
       @Autowired
       CountryService countryService;
   
       @RequestMapping("hello")
       public String test(Model model) {
           Country country = countryService.getCountryById(1);
           model.addAttribute("country",country);
           return "hello";
       }
   
   }
   

<?xml version="1.0" encoding="UTF8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<!--定义为当前的命名空间-->
<mapper namespace="com.wang.dao.CountryDao">
    <select id="selectACountry" resultType="com.wang.model.Country">
        select * from country where id = #{countryId};
    </select>

</mapper>

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<center><h1>显示成功!!!</h1>
国家名字: <p th:text="${country.countryName}"></p>
国家ID:  <p th:text="${country.countryCode}"></p>
</body>
</html>

后续需要其他依赖的再加入即可，像文件的上传下载依赖等。

有问题请联系我。