SpringBoot2.0系列教程(一)Springboot框架搭建及整合MyBatis
Hello大家好,本章我们搭建项目基础框架结构和整合mybatis;项目所需环境jdk1.8,maven,mysql数据库;开发工具IDEA。另求各路大神指点,感谢
一:通过idea工具构建基础框架
1. 打开idea,左上角File→New→Project,看到如下图的页面
4. 点击Next,选择工作目录,点击Finish,开始构建
5. 创建完成后,项目目录结构如下
DemoApplicttion.java为项目的启动类
application.properties为项目配置文件
pom.xml主要描述了项目的maven坐标,依赖关系,开发者需要遵循的规则,缺陷管理系统,组织和licenses,以及其他所有的项目相关因素,是项目级别的配置文件(说人话:项目所需jar包的管理)
二:配置数据库信息
在application.properties文件中添加如下数据库配置
spring.datasource.url=jdbc:mysql://localhost:3306/demo?useSSL=false&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&transformedBitIsBoolean=true&autoReconnect=true&failOverReadOnly=false spring.datasource.username=数据库用户名 spring.datasource.password=数据库密码 spring.datasource.driverClassName=com.mysql.jdbc.Driver
三:创建数据库UserInfo表
CREATE TABLE `user_info` ( `id` int(32) NOT NULL AUTO_INCREMENT, `user_name` varchar(255) DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
四:创建项目基本目录结构
Model
package com.example.demo.model; import javax.persistence.Column; import javax.persistence.Id; /** * @author 张瑶 * @Description: * @time 2018/4/18 11:55 */ public class UserInfo { /** * 主键 */ @Id private String id; /** * 用户名 */ @Column(name = "user_name") private String userName; private String password; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } }
Mapper
<?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.example.demo.dao.UserInfoMapper"> <resultMap id="BaseResultMap" type="com.example.demo.model.UserInfo"> <id column="id" jdbcType="INTEGER" property="id"/> <result column="user_name" jdbcType="VARCHAR" property="userName"/> </resultMap> <sql id="Base_Column_List"> id,user_name </sql> <select id="selectById" parameterType="java.lang.Integer" resultMap="BaseResultMap"> select <include refid="Base_Column_List"/> from user_info where id = #{id,jdbcType=VARCHAR} </select> </mapper>
Dao
package com.example.demo.dao; import com.example.demo.model.UserInfo; import org.apache.ibatis.annotations.Param; /** * @author 张瑶 * @Description: * @time 2018/4/18 11:54 */ public interface UserInfoMapper { UserInfo selectById(@Param("id") Integer id); }
Service
package com.example.demo.service; import com.example.demo.model.UserInfo; /** * @author 张瑶 * @Description: * @time 2018/4/18 11:56 */ public interface UserInfoService { UserInfo selectById(Integer id); }
ServiceImpl
package com.example.demo.service.impl; import com.example.demo.dao.UserInfoMapper; import com.example.demo.model.UserInfo; import com.example.demo.service.UserInfoService; import org.springframework.stereotype.Service; import javax.annotation.Resource; /** * @author 张瑶 * @Description: * @time 2018/4/18 11:56 */ @Service public class UserInfoServiceImpl implements UserInfoService{ @Resource private UserInfoMapper userInfoMapper; public UserInfo selectById(Integer id){ return userInfoMapper.selectById(id); } }
Controller
package com.example.demo.controller; import com.example.demo.model.UserInfo; import com.example.demo.service.UserInfoService; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import javax.annotation.Resource; /** * @author 张瑶 * @Description: * @time 2018/4/18 11:39 */ @RestController @RequestMapping("userInfo") public class UserInfoController { @Resource private UserInfoService userInfoService; @PostMapping("/hello") public String hello(){ return "hello SpringBoot"; } @PostMapping("/selectById") public UserInfo selectById(Integer id){ return userInfoService.selectById(id); } }
Controller中@RestController注解的作用:
@RestController是由@Controller和@ResponseBody组成,表示该类是controller和返回的结果为JSON数据,不是页面路径。
重点看一下configurer中的MyBatisConfigurer.java
package com.example.demo.core.configurer; import org.apache.ibatis.session.SqlSessionFactory; import org.mybatis.spring.SqlSessionFactoryBean; import org.mybatis.spring.mapper.MapperScannerConfigurer; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.core.io.support.PathMatchingResourcePatternResolver; import org.springframework.core.io.support.ResourcePatternResolver; import javax.sql.DataSource; /** * @ClassName: MybatisConfigurer * @Description: Mybatis配置 * @author 张瑶 * @date 2018年1月20日 下午4:03:46 * */ @Configuration public class MybatisConfigurer { @Bean public SqlSessionFactory sqlSessionFactoryBean(DataSource dataSource) throws Exception { SqlSessionFactoryBean factory = new SqlSessionFactoryBean(); factory.setDataSource(dataSource); factory.setTypeAliasesPackage("com.example.demo.model"); // 添加XML目录 ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(); factory.setMapperLocations(resolver.getResources("classpath:mapper/*.xml")); return factory.getObject(); } @Bean public MapperScannerConfigurer mapperScannerConfigurer() { MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer(); mapperScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactoryBean"); mapperScannerConfigurer.setBasePackage("com.example.demo.dao"); return mapperScannerConfigurer; } }
@Configuration表示该文件是一个配置文件
@Bean表示该方法是一个传统xml配置文件中的<Bean id=""></Bean>
其中factory.setTypeAliasesPackage("com.example.demo.model")表示项目中model的存储路径;
factory.setMapperLocations(resolver.getResources("classpath:mapper/*.xml"));表示mapper.xml存储路径;
mapperScannerConfigurer.setBasePackage("com.example.demo.dao");表示dao层的存储路径
五:运行项目
找到DemoApplication,右键,选择run DemoApplication
控制台打印如下信息即为启动成功
六:测试接口
打开postman(Google浏览器插件,可以去应用商店下载),输入
注意修改自己的ip;出现以下结构数据即访问成功
{ "id": 1, "userName": "1" }
项目地址
码云地址: https://gitee.com/beany/mySpringBoot
GitHub地址: https://github.com/MyBeany/mySpringBoot
写文章不易,如对您有帮助,请帮忙点下star
结尾
框架搭建,整合mybatis已完成,后续功能接下来陆续更新,另求各路大神指点,感谢大家。
@[TOC](SpringBoot2.0系列教程(一)Springboot框架搭建及整合MyBatis)
# 本章内容
Hello大家好,本章我们搭建项目基础框架结构和整合mybatis;项目所需环境jdk1.8,maven,mysql数据库;开发工具IDEA。另求各路大佬指点,感谢
### 一:通过idea工具构建基础框架
- 打开idea,左上角File→New→Project,看到如下图的页面:![在这里插入图片描述](https://img-blog.csdnimg.cn/2019040314411022.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDg3MDkxOQ==,size_16,color_FFFFFF,t_70)
- 点击Next,配置如下图![在这里插入图片描述](https://img-blog.csdnimg.cn/20190403144144612.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDg3MDkxOQ==,size_16,color_FFFFFF,t_70) - 点击Next,配置如下图,这里我们选择数据库MySQL和持久层框架MyBatis![在这里插入图片描述](https://img-blog.csdnimg.cn/20190403144230327.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDg3MDkxOQ==,size_16,color_FFFFFF,t_70) - 点击Next,选择工作目录,点击Finish,开始构建 - 创建完成后,项目目录结构如下 ![在这里插入图片描述](https://img-blog.csdnimg.cn/20190403144257796.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDg3MDkxOQ==,size_16,color_FFFFFF,t_70)
- DemoApplicttion.java为项目的启动类。 - application.properties为项目配置文件 - pom.xml主要描述了项目的maven坐标,依赖关系,开发者需要遵循的规则,缺陷管理系统,组织和licenses,以及其他所有的项目相关因素,是项目级别的配置文件(说人话:项目所需jar包的管理)
### 二:配置数据库信息在application.properties文件中添加如下数据库配置
```spring.datasource.url=jdbc:mysql://localhost:3306/demo?useSSL=false&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&transformedBitIsBoolean=true&autoReconnect=true&failOverReadOnly=falsespring.datasource.username=数据库用户名spring.datasource.password=数据库密码spring.datasource.driverClassName=com.mysql.jdbc.Driver```### 三:创建数据库UserInfo表
```CREATE TABLE `user_info` ( `id` int(32) NOT NULL AUTO_INCREMENT, `user_name` varchar(255) DEFAULT NULL, PRIMARY KEY (`id`)) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8; ```### 四: 创建项目基本目录结构![在这里插入图片描述](https://img-blog.csdnimg.cn/20190403144555114.png)Model``` package com.example.demo.model; import javax.persistence.Column; import javax.persistence.Id; /** * @author 张瑶 * @Description: * @time 2018/4/18 11:55 */ public class UserInfo { /** * 主键 */ @Id private String id; /** * 用户名 */ @Column(name = "user_name") private String userName; private String password; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } }```
mapper
```<?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.example.demo.dao.UserInfoMapper"> <resultMap id="BaseResultMap" type="com.example.demo.model.UserInfo"> <id column="id" jdbcType="INTEGER" property="id"/> <result column="user_name" jdbcType="VARCHAR" property="userName"/> </resultMap>
<sql id="Base_Column_List"> id,user_name </sql>
<select id="selectById" parameterType="java.lang.Integer" resultMap="BaseResultMap"> select <include refid="Base_Column_List"/> from user_info where id = #{id,jdbcType=VARCHAR} </select>
</mapper>```dao
```package com.example.demo.dao;
import com.example.demo.model.UserInfo;import org.apache.ibatis.annotations.Param;
/** * @author 张瑶 * @Description: * @time 2018/4/18 11:54 */public interface UserInfoMapper {
UserInfo selectById(@Param("id") Integer id);}```Service
```package com.example.demo.service;
import com.example.demo.model.UserInfo;
/** * @author 张瑶 * @Description: * @time 2018/4/18 11:56 */public interface UserInfoService {
UserInfo selectById(Integer id);
}```ServiceImpl
```package com.example.demo.service.impl;
import com.example.demo.dao.UserInfoMapper;import com.example.demo.model.UserInfo;import com.example.demo.service.UserInfoService;import org.springframework.stereotype.Service;
import javax.annotation.Resource;
/** * @author 张瑶 * @Description: * @time 2018/4/18 11:56 */@Servicepublic class UserInfoServiceImpl implements UserInfoService{
@Resource private UserInfoMapper userInfoMapper;
public UserInfo selectById(Integer id){ return userInfoMapper.selectById(id); }}```Controller
```package com.example.demo.controller;
import com.example.demo.model.UserInfo;import com.example.demo.service.UserInfoService;import org.springframework.web.bind.annotation.PostMapping;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;
import javax.annotation.Resource;
/** * @author 张瑶 * @Description: * @time 2018/4/18 11:39 */@RestController@RequestMapping("userInfo")public class UserInfoController {
@Resource private UserInfoService userInfoService;
@PostMapping("/hello") public String hello(){ return "hello SpringBoot"; }
@PostMapping("/selectById") public UserInfo selectById(Integer id){ return userInfoService.selectById(id); }}```Controller中@RestController注解的作用:@RestController是由@Controller和@ResponseBody组成,表示该类是controller和返回的结果为JSON数据,不是页面路径。
重点看一下configurer中的MyBatisConfigurer.java
```package com.example.demo.core.configurer;
import org.apache.ibatis.session.SqlSessionFactory;import org.mybatis.spring.SqlSessionFactoryBean;import org.mybatis.spring.mapper.MapperScannerConfigurer;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import org.springframework.core.io.support.PathMatchingResourcePatternResolver;import org.springframework.core.io.support.ResourcePatternResolver;
import javax.sql.DataSource;
/** * @ClassName: MybatisConfigurer * @Description: Mybatis配置 * @author 张瑶 * @date 2018年1月20日 下午4:03:46 * */@Configurationpublic class MybatisConfigurer {
@Bean public SqlSessionFactory sqlSessionFactoryBean(DataSource dataSource) throws Exception { SqlSessionFactoryBean factory = new SqlSessionFactoryBean(); factory.setDataSource(dataSource); factory.setTypeAliasesPackage("com.example.demo.model"); // 添加XML目录 ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(); factory.setMapperLocations(resolver.getResources("classpath:mapper/*.xml")); return factory.getObject(); }
@Bean public MapperScannerConfigurer mapperScannerConfigurer() { MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer(); mapperScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactoryBean"); mapperScannerConfigurer.setBasePackage("com.example.demo.dao"); return mapperScannerConfigurer; }}
```
- @Configuration表示该文件是一个配置文件 - @Bean表示该方法是一个传统xml配置文件中的<Bean id=""></Bean> - 其中factory.setTypeAliasesPackage("com.example.demo.model")表示项目中model的存储路径; - factory.setMapperLocations(resolver.getResources("classpath:mapper/*.xml"));表示mapper.xml存储路径; - mapperScannerConfigurer.setBasePackage("com.example.demo.dao");表示dao层的存储路径
### 五:运行项目找到DemoApplication,右键,选择run DemoApplication
控制台打印如下信息即为启动成功![在这里插入图片描述](https://img-blog.csdnimg.cn/20190403145059546.png)### 六:接口测试打开postman(Google浏览器插件,可以去应用商店下载),输入![在这里插入图片描述](https://img-blog.csdnimg.cn/20190403145212198.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDg3MDkxOQ==,size_16,color_FFFFFF,t_70)注意修改自己的ip;出现以下结构数据即访问成功
```{ "id": 1, "userName": "1"}```
## 项目地址码云地址: https://gitee.com/beany/mySpringBoot
GitHub地址: https://github.com/MyBeany/mySpringBoot
**写文章不易,如对您有帮助,请帮忙点下star**
## 结尾框架搭建,整合mybatis已完成,后续功能接下来陆续更新。另求各路大神指点,感谢大家。