话不多数，直接开始撸代码…
工程结构图
开始之前先放张工程结构图
1、maven 依赖：
org.springframework.boot
spring-boot-starter-web
org.mybatis.spring.boot
mybatis-spring-boot-starter
1.3.2
com.github.pagehelper
pagehelper-spring-boot-starter
1.2.9
com.alibaba
druid-spring-boot-starter
1.1.9
org.projectlombok
lombok
mysql
mysql-connector-java
runtime
org.springframework.boot
spring-boot-starter-test
test
2、yml 配置文件：
spring:
application:
name: mybatis-curd
datasource:
username: root
password: root
url: jdbc:mysql://localhost:3306/test?zeroDateTimeBehavior=convertToNull&useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC&autoReconnect=true
continue-on-error: true
sql-script-encoding: UTF-8
driver-class-name: com.mysql.jdbc.Driver
type: com.alibaba.druid.pool.DruidDataSource
druid:
initial-size: 5
min-idle: 5
max-active: 20
max-wait: 60000
# 间隔多久进行一次检测，检测需要关闭的空闲连接
time-between-eviction-runs-millis: 60000
# 一个连接在池中最小生存的时间
min-evictable-idle-time-millis: 300000
validation-query: SELECT 1 FROM DUAL
test-while-idle: true
test-on-borrow: false
test-on-return: false
pool-prepared-statements: true
max-pool-prepared-statement-per-connection-size: 20
connect-properties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
use-global-data-source-stat: true
filters: stat,wall,log4j2
mybatis:
type-aliases-package: com.fxbin.mybaits.*
configuration:
map-underscore-to-camel-case: true
# 打印sql, 方便调试
log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
use-generated-keys: true
default-statement-timeout: 60
default-fetch-size: 100
3、核心代码：
User.java
package com.fxbin.mybatis.bean;
import lombok.Data;
import java.util.Date;
/**
* created with IntelliJ IDEA.
* author: fxbin
* date: 2018/10/21
* time: 5:59
* version: 1.0
* description:
*/
@Data
public class User {
/**
* 主键ID
*/
private Integer id;
/**
* 用户名
*/
private String username;
/**
* 密码
*/
private String password;
/**
* 创建时间
*/
private Date gmtCreate;
/**
* 修改时间
*/
private Date gmtModified;
}
MyBatisConfig.java
package com.fxbin.mybatis.config;
import com.github.pagehelper.PageHelper;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.util.Properties;
/**
* created with IntelliJ IDEA.
* author: fxbin
* date: 2018/10/21
* time: 11:33
* version: 1.0
* description: MyBatis 分页插件配置
*/
@Configuration
public class MyBatisConfig {
@Bean
public PageHelper pageHelper(){
PageHelper pageHelper = new PageHelper();
Properties p = new Properties();
// 设置为true时，会将RowBounds第一个参数offset当成pageNum页码使用
p.setProperty("offsetAsPageNum","true");
//设置为true时，使用RowBounds分页会进行count查询
p.setProperty("rowBoundsWithCount","true");
p.setProperty("reasonable","true");
pageHelper.setProperties(p);
return pageHelper;
}
}
UserController.java
package com.fxbin.mybatis.controller;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fxbin.mybatis.bean.User;
import com.fxbin.mybatis.service.UserService;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import javax.annotation.Resource;
/**
* created with IntelliJ IDEA.
* author: fxbin
* date: 2018/10/21
* time: 5:53
* version: 1.0
* description:
*/
@RestController
public class UserController {
@Resource
private UserService userService;
/**
* 查询全部
* @param page
* @param size
* @return
*/
@RequestMapping("/listAll")
public Object listAll(@RequestParam(value = "page",defaultValue = "1")int page,
@RequestParam(value = "size",defaultValue = "10")int size){
return userService.listAll(page, size);
}
/**
* 添加数据
* @param user
* @return
*/
@RequestMapping("/insert")
public int insert (User user){
return userService.insert(user);
}
/**
* 删除
* @param userId
* @return
*/
@RequestMapping("/remove")
public int remove(Integer userId){
return userService.remove(userId);
}
/**
* 修改
* @param user
* @return
*/
@RequestMapping("/update")
public int update(User user){
return userService.update(user);
}
}
UserService.java
package com.fxbin.mybatis.service;
import com.fxbin.mybatis.bean.User;
import java.util.List;
/**
* created with IntelliJ IDEA.
* author: fxbin
* date: 2018/10/21
* time: 5:54
* version: 1.0
* description:
*/
public interface UserService {
Object listAll(int page, int size);
int insert(User user);
int remove(Integer userId);
int update(User user);
}
UserServiceImpl.java
package com.fxbin.mybatis.service.impl;
import com.fxbin.mybatis.bean.User;
import com.fxbin.mybatis.mapper.UserMapper;
import com.fxbin.mybatis.service.UserService;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
import java.util.List;
/**
* created with IntelliJ IDEA.
* author: fxbin
* date: 2018/10/21
* time: 5:54
* version: 1.0
* description:
*/
@Service
public class UserServiceImpl implements UserService {
@Resource
private UserMapper userMapper;
@Override
public Object listAll(int page, int size) {
PageHelper.startPage(page, size);
List userList = userMapper.listAll();
PageInfo pageInfo = new PageInfo<>(userList);
return pageInfo;
}
@Override
public int insert(User user) {
return userMapper.insert(user);
}
@Override
public int remove(Integer userId) {
return userMapper.remove(userId);
}
@Override
public int update(User user) {
return userMapper.update(user);
}
}
UserMapper.java
package com.fxbin.mybatis.mapper;
import com.fxbin.mybatis.bean.User;
import org.apache.ibatis.annotations.*;
import java.util.List;
/**
* created with IntelliJ IDEA.
* author: fxbin
* date: 2018/10/21
* time: 5:55
* version: 1.0
* description:
*/
@Mapper
public interface UserMapper {
@Select({
"select * from user"
})
List listAll();
@Insert({
"insert into user(`username`, `password`) values(#{username}, #{password})"
})
int insert(User user);
@Delete({
"delete from user where id = #{userId}"
})
int remove(Integer userId);
@Update({
"update user set username = #{username}, password = #{password} where id = #{id}"
})
int update(User user);
}
4、测试
1)查询
2)添加
查看数据库记录，进一步验证，确实已经新增了一条记录
3)移除
查看数据库，id 为1 的记录已经成功移除
4)修改
我们修改之前新增的id为13 的记录，username 修改为 “修改”，password 修改为 “222”
查看数据库修改记录，已成功
总结：
以上就是有关 SpringBoot2.X 整合 Mysql + Mybatis 的 CURD 的简单案例，这里我没有对返回结果进行封装，各位可根据自行需要，进行返回结果的封装…
— end —
如有问题，请及时联系，谢谢
