springBoot集成mybatis+mysql项目搭建
大家都知道，现在Spring框架几乎无处不用，目前最新版本据说是Spring5，现在常用的基本还是Spring4.X，很多公司甚至用的还是Spring3.x，而Spring领域其中最好用的莫过于SpringBoot，这是从SpringMVC衍变出来的，本质还是SpringMVC，但是要比SpringMVC好用的多，因为很好用，所以笔者闲暇之际用SpringBoot从头至尾摸索着搭建了一个案例，分享出来，希望对感兴趣的朋友有所帮助。废话不说了，进入主题，直接分享案例搭建全流程。
本项目使用的环境：
开发工具：Intellij IDEA 2017.1.3
jdk：1.8.0_51
maven:3.5.2
额外功能
mybatis generator 自动生成代码插件
步骤：
1.创建一个springboot项目：
2.创建项目的文件结构以及jdk的版本
3.选择项目所需要的依赖
选择持久化框架的依赖
然后点击finish
5.项目结构如下：
6.查看文件pom.xml：
4.0.0
com.ocean
springboot-mybatis-demo
0.0.1-SNAPSHOT
jar
springboot-mybatis-demo
Demo project for Spring Boot
org.springframework.boot
spring-boot-starter-parent
1.5.10.RELEASE
UTF-8
UTF-8
1.8
org.springframework.boot
spring-boot-starter-jdbc
org.mybatis.spring.boot
mybatis-spring-boot-starter
1.3.1
org.springframework.boot
spring-boot-starter-web
mysql
mysql-connector-java
5.1.6
org.springframework.boot
spring-boot-starter-test
test
org.springframework.boot
spring-boot-maven-plugin
org.mybatis.generator
mybatis-generator-maven-plugin
1.3.1
${basedir}/src/main/resources/generator/generatorConfig.xml
true
true
7.本案例不使用application.properties文件 而使用更加简洁的application.yml文件。将resource文件夹下原有的application.properties文件删除，创建application.yml配置文件（备注：其实SpringBoot底层会把application.yml文件解析为application.properties）， 文件的内容如下(此处只配置最基本的)：
server:
port: 8080
spring:
datasource:
name: test
url: jdbc:mysql://127.0.0.1:3306/chenyun01
username: root
password: root
driver-class-name: com.mysql.jdbc.Driver
mybatis:
mapper-locations: classpath:mapping/*Mapper.xml
type-aliases-package: com.ocean.pojo
8.创建数据库：
在mysql（此处用SQLyog客户端）下创建数据库chenyun01，新建数据表userInfo，插入2条数据，结构如下
9.配置mybatis generator 自动生成代码插件
配置pom.xml中generator 插件所对应的配置文件 ${basedir}/src/main/resources/generator/generatorConfig.xml
自动生成代码：点击run----> Edit Configurations
添加配置
运行
最后生成的项目结构：
10.我们还需要修改有点东西，因为生成的类中的路径写了全路径，所以我们要把前面多余的（main.java.）删掉：
生成的接口文件UserMapper.java
package com.ocean.dao;
import com.ocean.pojo.UserInfo;
import java.util.List;
public interface UserInfoMapper {
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table userinfo
*
* @mbggenerated
*/
int insert(UserInfo record);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table userInfo
*
* @mbggenerated
*/
int insertSelective(com.ocean.pojo.UserInfo record);
//这个方式我自己单独加的方法
List findAllUser();
}
模型(POJO)UserInfo.java
package com.ocean.pojo;
public class UserInfo {
/**
* This field was generated by MyBatis Generator.
* This field corresponds to the database column userinfo.userId
*
* @mbggenerated
*/
private Integer userid;
/**
* This field was generated by MyBatis Generator.
* This field corresponds to the database column userinfo.userName
*
* @mbggenerated
*/
private String username;
/**
* This field was generated by MyBatis Generator.
* This field corresponds to the database column userinfo.phone
*
* @mbggenerated
*/
private String phone;
/**
* This field was generated by MyBatis Generator.
* This field corresponds to the database column userinfo.sex
*
* @mbggenerated
*/
private String sex;
/**
* This method was generated by MyBatis Generator.
* This method returns the value of the database column userinfo.userId
*
* @return the value of userinfo.userId
*
* @mbggenerated
*/
public Integer getUserid() {
return userid;
}
/**
* This method was generated by MyBatis Generator.
* This method sets the value of the database column userinfo.userId
*
* @param userid the value for userinfo.userId
*
* @mbggenerated
*/
public void setUserid(Integer userid) {
this.userid = userid;
}
/**
* This method was generated by MyBatis Generator.
* This method returns the value of the database column userinfo.userName
*
* @return the value of userinfo.userName
*
* @mbggenerated
*/
public String getUsername() {
return username;
}
/**
* This method was generated by MyBatis Generator.
* This method sets the value of the database column userinfo.userName
*
* @param username the value for userinfo.userName
*
* @mbggenerated
*/
public void setUsername(String username) {
this.username = username == null ? null : username.trim();
}
/**
* This method was generated by MyBatis Generator.
* This method returns the value of the database column userinfo.phone
*
* @return the value of userinfo.phone
*
* @mbggenerated
*/
public String getPhone() {
return phone;
}
/**
* This method was generated by MyBatis Generator.
* This method sets the value of the database column userinfo.phone
*
* @param phone the value for userinfo.phone
*
* @mbggenerated
*/
public void setPhone(String phone) {
this.phone = phone == null ? null : phone.trim();
}
/**
* This method was generated by MyBatis Generator.
* This method returns the value of the database column userinfo.sex
*
* @return the value of userinfo.sex
*
* @mbggenerated
*/
public String getSex() {
return sex;
}
/**
* This method was generated by MyBatis Generator.
* This method sets the value of the database column userinfo.sex
*
* @param sex the value for userinfo.sex
*
* @mbggenerated
*/
public void setSex(String sex) {
this.sex = sex == null ? null : sex.trim();
}
}
对于映射文件UserInfoMapper.xml,删除多余的“main.java.”字符，配置xml的namespace
如果有的人的xml里的sql语句有黄色的背景，真心看不下去时（解决方案按照下图）：
UserMapper.xml
insert into userinfo (userId, userName, phone,
sex)
values (#{userid,jdbcType=INTEGER}, #{username,jdbcType=VARCHAR}, #{phone,jdbcType=VARCHAR},
#{sex,jdbcType=VARCHAR})
insert into userinfo
userId,
userName,
phone,
sex,
#{userid,jdbcType=INTEGER},
#{username,jdbcType=VARCHAR},
#{phone,jdbcType=VARCHAR},
#{sex,jdbcType=VARCHAR},
11.打开类SpringbootMybatisDemoApplication.java，这个是springboot的启动类。我们需要添加点东西：
package com.ocean.springbootmybatisdemo;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.embedded.EmbeddedServletContainerCustomizer;
import org.springframework.boot.web.servlet.ErrorPage;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.http.HttpStatus;
@SpringBootApplication
@MapperScan("com.ocean.dao")
@ComponentScan(basePackages = {"com.ocean.*"})
public class SpringbootMybatisDemoApplication {
public static void main(String[] args) {
SpringApplication.run(SpringbootMybatisDemoApplication.class, args);
}
}
12.到这里本案例的搭建工作都完成了，接下来就是直接在浏览器上测试：
首先看一下完成之后的文件的结构：
现在把controller，service层的代码都写好(因做演示，此处控制器只写了一个方法)：UserController.java
package com.ocean.controller;
import com.ocean.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
@RestController
@RequestMapping(value = {"/user"})
public class UserController {
@Autowired
private IUserService userService;
@RequestMapping(value = {"/findAll"},produces = {"application/json;charset=UTF-8"},method = RequestMethod.GET)
public List getAllUsers(){
List list = userService.findAllUser();
return list;
}
}IUserService.java
package com.ocean.service;
import java.util.List;
public interface IUserService {
List findAllUser();
}
UserServiceImpl.java
package com.ocean.service.impl;
import com.ocean.dao.UserInfoMapper;
import com.ocean.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service(value = "userService")
public class UserServiceImpl implements IUserService {
@Autowired
private UserInfoMapper userDao;//这里可能会报错，但是并不会影响
@Override
public List findAllUser(){
return userDao.findAllUser();
}
}
如果强迫症看不下去上面那个报错：（解决方法）
直接在浏览器访问，返回的数据确实是表里插入的2条数据，说明项目已经搭建成功了！！
源码地址：https://github.com/guobinhui/javaWeb-project/tree/master/springboot-mybatis-demo
---------------------
作者：guobinhui
来源：CSDN
原文：https://blog.csdn.net/guobinhui/article/details/79289189
版权声明：本文为博主原创文章，转载请附上博文链接！