springboot整合mybatis

一、项目结构展示

二、开始整合

1、引入pom依赖

进入Maven中央仓库选择自己所需要的依赖，maven仓库地址：Maven Central

完整Maven依赖如下：

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.mgx</groupId><artifactId>springboot-mgx</artifactId><version>0.0.1-SNAPSHOT</version><name>springboot-mgx</name><description>springboot项目整合</description><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.1.4.RELEASE</version></parent><properties><java.version>1.8</java.version><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding></properties><dependencies><!-- springboot web --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!--lombok--><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency><!--mysql相关--><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.27</version></dependency><!--mybatis相关--><dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>1.3.2</version></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><version>2.1.4.RELEASE</version></plugin></plugins></build></project>

2、添加application 或 bootstrap 配置

server:# 端口号port: 8080spring:# 配置数据源datasource:username: rootpassword: 123456url: jdbc:mysql://localhost:3306/mgx_test?useUnicode=true&characterEncoding=utf-8&useSSL=true&serverTimezone=UTCdriver-class-name: com.mysql.cj.jdbc.Driver# 配置mybatis
mybatis:#指定位置扫描Mapper接口对应的XML文件 classpath:xml文件位置mapper-locations: classpath:mapper/*.xml#指定扫描包位置让mybatis自动扫描到指定义的entity包下type-aliases-package: com.mgx.entity

3、创建表

CREATE TABLE `t_info_user` (`id` bigint(11) NOT NULL AUTO_INCREMENT COMMENT '自增主键',`name` varchar(64) NOT NULL COMMENT '姓名',`phone` varchar(11) NOT NULL COMMENT '手机号',`age` int(3) NOT NULL COMMENT '年龄',`sex` int(1) NOT NULL COMMENT '性别  0-女 1-男 2-其他',`address` varchar(255) NOT NULL COMMENT '家庭地址',`income` decimal(19,2) DEFAULT NULL COMMENT '年收入',PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='用户基础信息表';

4、项目结构

5、类内容

UserController

package com.mgx.controller;import com.mgx.entity.InfoUser;
import com.mgx.service.UserService;
import org.apache.ibatis.annotations.Param;
import org.springframework.web.bind.annotation.*;import javax.annotation.Resource;/*** @author mgx* @date 2023/9/15 3:25 PM*/
@RestController
@RequestMapping("/user")
public class UserController {@Resourceprivate UserService userService;@PostMapping("/addUserInfo")public String addUserInfo(@RequestBody InfoUser infoUser) {boolean flag = userService.addUserInfo(infoUser);if (flag){return "添加成功!";} else {return "添加失败!";}}@GetMapping("/getUserInfo")public InfoUser getUserInfo(@Param("id") Long id) {return userService.getUserInfo(id);}@DeleteMapping("/deleteUserInfo")public String deleteUserInfo(@Param(value = "id") Long id){boolean flag = userService.deleteUserInfo(id);if (flag){return "删除成功!";} else {return "删除失败!";}}@PutMapping("/updateUserInfo")public String updateUserInfo(@RequestBody InfoUser infoUser){boolean flag = userService.updateUserInfo(infoUser);if (flag){return "更新成功!";} else {return "更新失败!";}}}

UserService

package com.mgx.service;import com.mgx.entity.InfoUser;/*** @author mgx* @date 2023/9/15 3:38 PM*/
public interface UserService {boolean addUserInfo(InfoUser infoUser);InfoUser getUserInfo(Long id);boolean deleteUserInfo(Long id);boolean updateUserInfo(InfoUser infoUser);
}

UserServiceImpl

package com.mgx.service.impl;import com.mgx.entity.InfoUser;
import com.mgx.mapper.InfoUserMapper;
import com.mgx.service.UserService;
import org.springframework.stereotype.Service;import javax.annotation.Resource;/*** @author mgx* @date 2023/9/15 3:38 PM*/
@Service
public class UserServiceImpl implements UserService {@Resourceprivate InfoUserMapper infoUserMapper;@Overridepublic boolean addUserInfo(InfoUser infoUser) {int addRow = infoUserMapper.insert(infoUser);return addRow == 1;}@Overridepublic InfoUser getUserInfo(Long id) {return infoUserMapper.selectByPrimaryKey(id);}@Overridepublic boolean deleteUserInfo(Long id) {int deleteRow = infoUserMapper.deleteByPrimaryKey(id);return deleteRow == 1;}@Overridepublic boolean updateUserInfo(InfoUser infoUser) {int updateRow = infoUserMapper.updateByPrimaryKeySelective(infoUser);return updateRow == 1;}}

InfoUser

package com.mgx.entity;import java.math.BigDecimal;/*** 用户基础信息表* @author mgx*/
public class InfoUser {/*** 自增主键*/private Long id;/*** 姓名*/private String name;/*** 手机号*/private String phone;/*** 年龄*/private Integer age;/*** 性别  0-女 1-男 2-其他*/private Integer sex;/*** 家庭地址*/private String address;/*** 年收入*/private BigDecimal income;public Long getId() {return id;}public void setId(Long id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getPhone() {return phone;}public void setPhone(String phone) {this.phone = phone;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}public Integer getSex() {return sex;}public void setSex(Integer sex) {this.sex = sex;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}public BigDecimal getIncome() {return income;}public void setIncome(BigDecimal income) {this.income = income;}
}

InfoUserMapper

package com.mgx.mapper;import com.mgx.entity.InfoUser;/*** @author  mgx* @date  2023/9/15 3:29 PM*/
public interface InfoUserMapper {int deleteByPrimaryKey(Long id);int insert(InfoUser record);int insertSelective(InfoUser record);InfoUser selectByPrimaryKey(Long id);int updateByPrimaryKeySelective(InfoUser record);int updateByPrimaryKey(InfoUser record);}

InfoUserMapper.xml

<?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.mgx.mapper.InfoUserMapper"><resultMap id="BaseResultMap" type="com.mgx.entity.InfoUser"><!--@mbg.generated--><!--@Table t_info_user--><id column="id" jdbcType="BIGINT" property="id" /><result column="name" jdbcType="VARCHAR" property="name" /><result column="phone" jdbcType="VARCHAR" property="phone" /><result column="age" jdbcType="INTEGER" property="age" /><result column="sex" jdbcType="INTEGER" property="sex" /><result column="address" jdbcType="VARCHAR" property="address" /><result column="income" jdbcType="DECIMAL" property="income" /></resultMap><sql id="Base_Column_List"><!--@mbg.generated-->id, `name`, phone, age, sex, address, income</sql><select id="selectByPrimaryKey" parameterType="java.lang.Long" resultMap="BaseResultMap"><!--@mbg.generated-->select <include refid="Base_Column_List" />from t_info_userwhere id = #{id,jdbcType=BIGINT}</select><delete id="deleteByPrimaryKey" parameterType="java.lang.Long"><!--@mbg.generated-->delete from t_info_userwhere id = #{id,jdbcType=BIGINT}</delete><insert id="insert" keyColumn="id" keyProperty="id" parameterType="com.mgx.entity.InfoUser" useGeneratedKeys="true"><!--@mbg.generated-->insert into t_info_user (`name`, phone, age, sex, address, income)values (#{name,jdbcType=VARCHAR}, #{phone,jdbcType=VARCHAR}, #{age,jdbcType=INTEGER}, #{sex,jdbcType=INTEGER}, #{address,jdbcType=VARCHAR}, #{income,jdbcType=DECIMAL})</insert><insert id="insertSelective" keyColumn="id" keyProperty="id" parameterType="com.mgx.entity.InfoUser" useGeneratedKeys="true"><!--@mbg.generated-->insert into t_info_user<trim prefix="(" suffix=")" suffixOverrides=","><if test="name != null">`name`,</if><if test="phone != null">phone,</if><if test="age != null">age,</if><if test="sex != null">sex,</if><if test="address != null">address,</if><if test="income != null">income,</if></trim><trim prefix="values (" suffix=")" suffixOverrides=","><if test="name != null">#{name,jdbcType=VARCHAR},</if><if test="phone != null">#{phone,jdbcType=VARCHAR},</if><if test="age != null">#{age,jdbcType=INTEGER},</if><if test="sex != null">#{sex,jdbcType=INTEGER},</if><if test="address != null">#{address,jdbcType=VARCHAR},</if><if test="income != null">#{income,jdbcType=DECIMAL},</if></trim></insert><update id="updateByPrimaryKeySelective" parameterType="com.mgx.entity.InfoUser"><!--@mbg.generated-->update t_info_user<set><if test="name != null">`name` = #{name,jdbcType=VARCHAR},</if><if test="phone != null">phone = #{phone,jdbcType=VARCHAR},</if><if test="age != null">age = #{age,jdbcType=INTEGER},</if><if test="sex != null">sex = #{sex,jdbcType=INTEGER},</if><if test="address != null">address = #{address,jdbcType=VARCHAR},</if><if test="income != null">income = #{income,jdbcType=DECIMAL},</if></set>where id = #{id,jdbcType=BIGINT}</update><update id="updateByPrimaryKey" parameterType="com.mgx.entity.InfoUser"><!--@mbg.generated-->update t_info_userset `name` = #{name,jdbcType=VARCHAR},phone = #{phone,jdbcType=VARCHAR},age = #{age,jdbcType=INTEGER},sex = #{sex,jdbcType=INTEGER},address = #{address,jdbcType=VARCHAR},income = #{income,jdbcType=DECIMAL}where id = #{id,jdbcType=BIGINT}</update>
</mapper>

SpringbootMgxApplication

package com.mgx;import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;/*** @author mgx*/
@MapperScan("com.mgx.mapper")
@SpringBootApplication
public class SpringbootMgxApplication {public static void main(String[] args) {System.out.println("开始启动");SpringApplication.run(SpringbootMgxApplication.class, args);System.out.println("启动成功");}}