• SSM集成Thymeleaf


    SSM整合Thymeleaf

    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。

    创建项目

    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。

    Spring+SpringMVC+MyBatis的配置文件

    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>
      

    数据库内容

    数据库内容
    数据库内容

    dao层+service层+controller层

    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";
          }
      
      }
      

    映射文件

    <?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>
    

    前端简单页面

    <!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>
    

    配置tomcat,运行显示

    总体项目架构

    补充

    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。

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  • 原文地址:https://www.cnblogs.com/chixinwang/p/16036294.html