一:通過idea工具構建基礎框架
1. 打開idea箱叁,左上角File→New→Project,看到如下圖的頁面
2. 點擊Next仲翎,配置如下圖
3. 點擊Next甘磨,配置如下圖,這里我們選擇數(shù)據(jù)庫MySQL和持久層框架MyBatis
4. 點擊Next患整,選擇工作目錄拜效,點擊Finish喷众,開始構建
5. 創(chuàng)建完成后,項目目錄結構如下
DemoApplicttion.java為項目的啟動類
application.properties為項目配置文件
pom.xml主要描述了項目的maven坐標紧憾,依賴關系到千,開發(fā)者需要遵循的規(guī)則,缺陷管理系統(tǒng)赴穗,組織和licenses憔四,以及其他所有的項目相關因素,是項目級別的配置文件(說人話:項目所需jar包的管理)
二:配置數(shù)據(jù)庫信息
在application.properties文件中添加如下數(shù)據(jù)庫配置
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=數(shù)據(jù)庫用戶名
spring.datasource.password=數(shù)據(jù)庫密碼
spring.datasource.driverClassName=com.mysql.jdbc.Driver
三:創(chuàng)建數(shù)據(jù)庫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:創(chuàng)建項目基本目錄結構
Model
package com.example.demo.model;
import javax.persistence.Column;
import javax.persistence.Id;
/**
* @author 張瑤
* @Description:
* @time 2018/4/18 11:55
*/
public class UserInfo {
/**
* 主鍵
*/
private String id;
/**
* 用戶名
*/
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
id,user_name
select
from user_info
where id = #{id,jdbcType=VARCHAR}
Dao
package com.example.demo.dao;
import com.example.demo.model.UserInfo;
import org.apache.ibatis.annotations.Param;
/**
* @author 張瑤
* @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 張瑤
* @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 張瑤
* @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 張瑤
* @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組成般眉,表示該類是controller和返回的結果為JSON數(shù)據(jù)了赵,不是頁面路徑。
重點看一下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 張瑤
* @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目錄
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表示該文件是一個配置文件
@Bean表示該方法是一個傳統(tǒng)xml配置文件中的<Bean id=""></Bean>
其中factory.setTypeAliasesPackage("com.example.demo.model")表示項目中model的存儲路徑甸赃;
factory.setMapperLocations(resolver.getResources("classpath:mapper/*.xml"));表示mapper.xml存儲路徑柿汛;
mapperScannerConfigurer.setBasePackage("com.example.demo.dao");表示dao層的存儲路徑
五:運行項目
找到DemoApplication,右鍵埠对,選擇run DemoApplication
控制臺打印如下信息即為啟動成功
六:測試接口
打開postman(Google瀏覽器插件络断,可以去應用商店下載),輸入
注意修改自己的ip鸠窗;出現(xiàn)以下結構數(shù)據(jù)即訪問成功
{
"id": 1,
"userName": "1"
}
結尾
框架搭建妓羊,整合mybatis已完成,后續(xù)功能接下來陸續(xù)更新稍计,另求各路大神指點躁绸,感謝大家。