spingboot整合Mybatis的web案例

还是再来了解一些springboot

spring boot自述 spring boot
是用来简化spring应用的搭建到开发过程，应用开箱即用，只要通过“just-jar"或tomcat或maven插件run或shell脚本，就可以启动项目。二者，spring boot只要很少的spring配置文件，因为”习惯优于配置"原则，是的spring boot 在开发应用和微服务架构实践中得到广泛应用。

数据库准备

CREATE DATABASE springbootdb;

创建表

DROP TABLE IF EXISTS  `city`;
CREATE TABLE `city` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT COMMENT '城市编号',
  `province_id` int(10) unsigned  NOT NULL COMMENT '省份编号',
  `city_name` varchar(25) DEFAULT NULL COMMENT '城市名称',
  `description` varchar(25) DEFAULT NULL COMMENT '描述',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;

项目结构介绍

org.spring.springboot.controller - Controller 层
org.spring.springboot.dao - 数据操作层 DAO
org.spring.springboot.domain - 实体类
org.spring.springboot.service - 业务逻辑层
Application - 应用启动类
application.properties - 应用配置文件，应用启动会自动读取配置（数据库配置文件）

具体实现代码

controller

@Controller
public class CityController {

    @Autowired
    private CityService cityService;

    @RequestMapping(value = "/api/city/{id}", method = RequestMethod.GET)
        public String findOneCity(Model model, @PathVariable("id") Long id) {
        model.addAttribute("city", cityService.findCityById(id));
        return "city";
    }

    @RequestMapping(value = "/api/city", method = RequestMethod.GET)
    public String findAllCity(Model model) {
        List<City> cityList = cityService.findAllCity();
        model.addAttribute("cityList",cityList);
        return "cityList";
    }
}

dao层

@Repository
public interface CityDao {

    /**
     * 获取城市信息列表
     *
     * @return
     */
    List<City> findAllCity();

    /**
     * 根据城市 ID，获取城市信息
     *
     * @param id
     * @return
     */
    City findById(@Param("id") Long id);

    Long saveCity(City city);

    Long updateCity(City city);

    Long deleteCity(Long id);
}

实体类

public class City {

    /**
     * 城市编号
     */
    private Long id;

    /**
     * 省份编号
     */
    private Long provinceId;

    /**
     * 城市名称
     */
    private String cityName;

    /**
     * 描述
     */
    private String description;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public Long getProvinceId() {
        return provinceId;
    }

    public void setProvinceId(Long provinceId) {
        this.provinceId = provinceId;
    }

    public String getCityName() {
        return cityName;
    }

    public void setCityName(String cityName) {
        this.cityName = cityName;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }
}

service业务逻辑层
业务接口

public interface CityService {

    /**
     * 获取城市信息列表
     *
     * @return
     */
    List<City> findAllCity();

    /**
     * 根据城市 ID,查询城市信息
     *
     * @param id
     * @return
     */
    City findCityById(Long id);

    /**
     * 新增城市信息
     *
     * @param city
     * @return
     */
    Long saveCity(City city);

    /**
     * 更新城市信息
     *
     * @param city
     * @return
     */
    Long updateCity(City city);

    /**
     * 根据城市 ID,删除城市信息
     *
     * @param id
     * @return
     */
    Long deleteCity(Long id);
}

业务实现

@Service
public class CityServiceImpl implements CityService {

    @Autowired
    private CityDao cityDao;
    @Override
    public List<City> findAllCity(){
        return cityDao.findAllCity();
    }

    @Override
    public City findCityById(Long id) {
        return cityDao.findById(id);
    }

    @Override
    public Long saveCity(City city) {
        return cityDao.saveCity(city);
    }

    @Override
    public Long updateCity(City city) {
        return cityDao.updateCity(city);
    }

    @Override
    public Long deleteCity(Long id) {
        return cityDao.deleteCity(id);
    }

}

pom文件

<!-- Spring Boot 启动父依赖 -->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.1.RELEASE</version>
    </parent>

    <properties>
        <mybatis-spring-boot>1.2.0</mybatis-spring-boot>
        <mysql-connector>5.1.39</mysql-connector>
    </properties>

    <dependencies>
        <!-- Spring Boot Freemarker 依赖 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-freemarker</artifactId>
        </dependency>

        <!-- Spring Boot Web 依赖 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- Spring Boot Test 依赖 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!-- Spring Boot Mybatis 依赖 -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>${mybatis-spring-boot}</version>
        </dependency>

        <!-- MySQL 连接驱动依赖 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql-connector}</version>
        </dependency>



        <!-- Junit -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>

    </dependencies>

application.properties

## 数据源配置
spring.datasource.url=jdbc:mysql://localhost:3306/springbootdb?useUnicode=true&characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.jpa.properties.hibernate.hbm2ddl.auto=create-drop
## Mybatis 配置
mybatis.typeAliasesPackage=org.spring.springboot.domain
mybatis.mapperLocations=classpath:mapper/*.xml
#
### Freemarker 配置
### 文件配置路径
spring.freemarker.template-loader-path=classpath:/web/
spring.freemarker.cache=false
spring.freemarker.charset=UTF-8
spring.freemarker.check-template-location=true
spring.freemarker.content-type=text/html
spring.freemarker.expose-request-attributes=true
spring.freemarker.expose-session-attributes=true
spring.freemarker.request-context-attribute=request
spring.freemarker.suffix=.ftl

页面效果

具体的页面可以结合前端框架