mybatis古今未来
最近无意之中发现了一个非常棒的持久层框架mybatis-flex，迫不及待研究了一下
发现简直就是我的梦中情框，之前写ibatis，后来写mybatis，接着写mybatis-plus，接着研究mybatis-flex
ibatis
ibatis是apache开源的，当时是一款轻量级的数据据持久层的半自动式开发框架
它简化直接用jdbc开发的60%以上的代码量，并且支持将sql写入xml中，使结构变得非常清晰，而且能灵活配置，从此进入了ibatis的时代，受到当时大量的开发人员的喜爱
优点：
- 简化了直接使用jdbc产生的大量代码
- 定义xml映射器，将sql语句与java代码分离，维护更轻松
- 查询能将结果集反映射到java对象中
- 提供了事物管理和连接池管理
- 。。。。
缺点：
- 结果集封装单一，不够灵活
- 增删改查，入参有限制，只有一个
- 配置关系太多
- 不够优化，大量的单表操作仍旧需要手动写增删改查等sql
- 复杂查询逻辑会出现嵌套查询 n+1的情况，造成资源抢占，拥护，卡顿
- 。。。。
mybatis：
它就是千锤百炼锻造出来的，它的前身就是ibatis
优点：
- 前身是ibatis，所以它有ibatis的一切优点
- 借助jdk的泛型和注解特性进一步做了简化
- 实现了接口绑定，自动生成接口的具体实现，简化了ibatis在dao与xml的映射关系需要指定的操作
- 对象关系映射改进，效率更高
- 性能高：提供了缓存机制提高性能，存储过程等
- 。。。。
缺点
- sql编写工作量较大，大量的单表操作仍旧需要写常规的sql语句
- 配置关系仍旧太多
- 复杂的查询操作需要自己编写sql语句
- 缓存使用不当，容易产生脏数据
- 。。。
mybatis-plus
它是mybatis的增强工具，在mybatis的基础上只做增强不做改变
优点：
- 它只是增强mybatis，所以mybatis一切优点它全都继承了过来
- 依赖少，仅仅依赖 Mybatis 以及 Mybatis-Spring 。
- 预防sql注入，内置sql注入剥离器，可以很好的防止sql注入
- 内置多种主键策略
- 单表增删改查等业务可以不用写sql
- 强大的条件构造器可以满足各种使用需求
- 支持Lambda形式调用
- 。。。。
缺点：
- 分页查询无sql解析设计
- 不支持多表查询
- 不支持多主键，复合主键
- 。。。。
MyBatis-Flex
它也是在mybatis上做了增强
- 拥有mybatis所有的优点
- 仅依赖mybatis，体积更小更轻量
- 支持多表查询
- 支持多主键，复合主键
- 。。。。。
我的要求：
- 不用写重复性单表增删改查的业务，
- 能支持分页查询
- 支持多表查询
- 支持rpc远程调用
mybatis-flex满足了我所有的要求，所以我觉得自己很有必要去了解一下
例子截图
代码部分
<?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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>3.1.2</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.zxs</groupId>
<artifactId>springboot-mybatis-flex</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>springboot-mybatis-flex</name>
<description>springboot-mybatis-flex</description>
<properties>
<java.version>17</java.version>
<mybatis-flex.version>1.5.6</mybatis-flex.version>
<fastjson.version>1.2.47</fastjson.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.github.xiaoymin</groupId>
<artifactId>knife4j-dependencies</artifactId>
<version>4.1.0</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.github.xiaoymin</groupId>
<artifactId>knife4j-openapi3-jakarta-spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>com.mysql</groupId>
<artifactId>mysql-connector-j</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>com.mybatis-flex</groupId>
<artifactId>mybatis-flex-spring-boot-starter</artifactId>
<version>${mybatis-flex.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>${fastjson.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>
spring:
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://127.0.0.1:3306/test
username: root
password: zkb.com
type: com.zaxxer.hikari.HikariDataSource
hikari:
connection-timeout: 30000
idle-timeout: 600000
max-lifetime: 1800000
maximum-pool-size: 100
minimum-idle: 10
pool-name: HikaraPool-1
springdoc:
swagger-ui:
path: /swagger-ui.html
tags-sorter: alpha
api-docs:
path: /v3/api-docs
group-configs:
- group: '查询接口'
paths-to-match: '/**'
packages-to-scan: com.zxs.springbootmybatisflex.controller.sys
- group: '增删改接口'
paths-to-match: '/**'
packages-to-scan: com.zxs.springbootmybatisflex.controller.client
default-flat-param-object: true
knife4j:
enable: true
package com.zxs.springbootmybatisflex.config;
import com.github.xiaoymin.knife4j.spring.annotations.EnableKnife4j;
import io.swagger.v3.oas.models.OpenAPI;
import io.swagger.v3.oas.models.info.Info;
import io.swagger.v3.oas.models.info.License;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
@EnableKnife4j
public class SwaggerConfig {
// 设置 openapi 基础参数
@Bean
public OpenAPI customOpenAPI() {
return new OpenAPI()
.info(new Info()
.title("zxs API 管理")
.version("1.0")
.description("探索mybatis-flex demo")
.license(new License().name("Apache 2.0")));
}
}
package com.zxs.springbootmybatisflex.controller.client;
import com.mybatisflex.core.query.QueryCondition;
import com.mybatisflex.core.query.QueryWrapper;
import com.zxs.springbootmybatisflex.entity.User;
import com.zxs.springbootmybatisflex.service.UserService;
import com.zxs.springbootmybatisflex.uitl.DataResult;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.tags.Tag;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import static com.zxs.springbootmybatisflex.entity.table.UserTableDef.USER;
@RestController
@Tag(name="用户增删改")
@RequestMapping("/suser")
public class SuserController {
@Autowired
UserService userService;
@Operation(summary = "根据id删除用户",description = "方式一")
@GetMapping("/deleteUser/{id}")
public DataResult<User> deleteUser(@PathVariable(value = "id") Long id){
DataResult<User> result = DataResult.success();
userService.deleteUser(id);
return result;
}
@Operation(summary = "根据id删除用户",description = "方式二")
@GetMapping("/deleteUser2/{id}")
public DataResult<User> deleteUser2(@PathVariable(value = "id") Long id){
DataResult<User> result = DataResult.success();
userService.removeById(id);
return result;
}
@Operation(summary = "根据id删除用户",description = "方式三")
@GetMapping("/deleteUser3/{id}")
public DataResult<User> deleteUser3(@PathVariable(value = "id") Long id){
DataResult<User> result = DataResult.success();
userService.deleteUser3(id);
return result;
}
@Operation(summary = "根据id删除用户",description = "方式四")
@GetMapping("/deleteUser4/{id}")
public DataResult<User> deleteUser4(@PathVariable(value = "id") Long id){
DataResult<User> result = DataResult.success();
QueryCondition queryCondition =USER.ID.eq(id);
userService.remove(queryCondition);
return result;
}
@Operation(summary = "增加用户",description = "方式一")
@PostMapping("/addUser1")
public DataResult<User> addUser1(@RequestBody User user){
DataResult<User> result = DataResult.success();
userService.save(user);
return result;
}
@Operation(summary = "修改用户",description = "方式一")
@PostMapping("/updateUser1")
public DataResult<User> updateUser1(@RequestBody User user){
DataResult<User> result = DataResult.success();
QueryWrapper queryWrapper = QueryWrapper.create().
where(USER.USERNAME.eq(user.getUsername())).
and(USER.PASSWORD.eq(user.getPassword()));
userService.update(user,queryWrapper);
return result;
}
@Operation(summary = "修改用户",description = "方式二")
@PostMapping("/updateUser2")
public DataResult<User> updateUser2(@RequestBody User user){
DataResult<User> result = DataResult.success();
QueryWrapper queryWrapper = QueryWrapper.create().
where(USER.USERNAME.eq(user.getUsername())).
and(USER.PASSWORD.eq(user.getPassword()));
userService.update(user,queryWrapper);
return result;
}
}
package com.zxs.springbootmybatisflex.controller.sys;
import com.zxs.springbootmybatisflex.entity.User;
import com.zxs.springbootmybatisflex.service.UserService;
import com.zxs.springbootmybatisflex.uitl.DataResult;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.tags.Tag;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
@RestController
@Tag(name="用户查询")
@RequestMapping("/user")
public class UserController {
@Autowired
UserService userService;
@Operation(summary = "获取全部用户",description="获取全部用户")
@GetMapping("/selectUsers")
public DataResult<List<User>> selectUsers(){
DataResult<List<User>> result = DataResult.success();
List<User> list = userService.list();
result.setData(list);
return result;
}
@Operation(summary = "根据id获取用户",description = "方式一")
@GetMapping("/selectUser/{id}")
public DataResult<User> selectUser(@PathVariable(value = "id") Long id){
DataResult<User> result = DataResult.success();
User user = userService.selectUserById(id);
result.setData(user);
return result;
}
@Operation(summary = "根据id获取用户",description = "方式二")
@GetMapping("/selectUser2/{id}")
public DataResult<User> selectUser2(@PathVariable(value = "id") Long id){
DataResult<User> result = DataResult.success();
User user = userService.getById(id);
result.setData(user);
return result;
}
@Operation(summary = "根据id获取用户",description = "方式三")
@GetMapping("/selectUser3/{id}")
public DataResult<User> selectUser3(@PathVariable(value = "id") Long id){
DataResult<User> result = DataResult.success();
User user = userService.selectUserById2(id);
result.setData(user);
return result;
}
}
package com.zxs.springbootmybatisflex.entity;
import com.fasterxml.jackson.annotation.JsonFormat;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import com.mybatisflex.annotation.Column;
import com.mybatisflex.annotation.Id;
import com.mybatisflex.annotation.KeyType;
import com.mybatisflex.annotation.Table;
//import io.swagger.annotations.ApiModel;
//import io.swagger.annotations.ApiModelProperty;
import io.swagger.v3.oas.annotations.media.Schema;
import io.swagger.v3.oas.annotations.tags.Tag;
import lombok.Data;
import lombok.EqualsAndHashCode;
import java.util.Date;
@Data
@EqualsAndHashCode(callSuper = false)
@Tag(name = "用户", description = "用户实体类")
@Table("user")
public class User{
@Schema(description="用户id")
@JsonSerialize(using = ToStringSerializer.class)
@Id(keyType = KeyType.Auto)
private Long id;
/**
* 用户名
*/
@Schema(description="用户名")
private String username;
/**
* 密码
*/
@Schema(description="密码")
private String password;
/**
* 名称
*/
@Schema(description="名称")
private String name;
/**
* 邮箱
*/
@Schema(description="邮箱")
private String email;
/**
* 联系方式
*/
@Schema(description="手机号")
private String phone;
/**
* 用户状态：1有效; 2删除
*/
@Schema(description="状态")
private Integer status;
/**
* 创建时间
*/
@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
@Column("createTime")
private Date createTime;
/**
* 用户类型
*/
@Schema(description="登录次数")
private Integer logins;
}
package com.zxs.springbootmybatisflex.exception.code;
public enum BaseResponseCode implements ResponseCodeInterface {
/**
* 这个要和前段约定好
* 引导用户去登录界面的
* code=401001 引导用户重新登录
* code=401002 token 过期刷新token
* code=401008 无权限访问
*/
SUCCESS(200,"操作成功"),
SYSTEM_BUSY(500001, "系统繁忙，请稍候再试"),
OPERATION_ERRO(500002,"操作失败"),
METHODARGUMENTNOTVALIDEXCEPTION(500003, "方法参数校验异常"),
;
/**
* 错误码
*/
private final int code;
/**
* 错误消息
*/
private final String msg;
BaseResponseCode(int code, String msg) {
this.code = code;
this.msg = msg;
}
@Override
public int getCode() {
return code;
}
@Override
public String getMsg() {
return msg;
}
}
package com.zxs.springbootmybatisflex.exception.code;
public interface ResponseCodeInterface {
int getCode();
String getMsg();
}
package com.zxs.springbootmybatisflex.exception.handler;
import com.zxs.springbootmybatisflex.exception.BusinessException;
import com.zxs.springbootmybatisflex.exception.code.BaseResponseCode;
import com.zxs.springbootmybatisflex.uitl.DataResult;
import lombok.extern.slf4j.Slf4j;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import java.util.List;
@RestControllerAdvice
@Slf4j
public class RestExceptionHandler {
@ExceptionHandler(Exception.class)
public <T> DataResult<T> handleException(Exception e){
log.error("Exception,exception:{}", e);
return DataResult.getResult(BaseResponseCode.SYSTEM_BUSY);
}
@ExceptionHandler(value = BusinessException.class)
<T> DataResult<T> businessExceptionHandler(BusinessException e) {
log.error("BusinessException,exception:{}", e);
return new DataResult<>(e.getMessageCode(),e.getDetailMessage());
}
@ExceptionHandler(MethodArgumentNotValidException.class)
<T> DataResult<T> methodArgumentNotValidExceptionHandler(MethodArgumentNotValidException e) {
log.error("methodArgumentNotValidExceptionHandler bindingResult.allErrors():{},exception:{}", e.getBindingResult().getAllErrors(), e);
List<ObjectError> errors = e.getBindingResult().getAllErrors();
return createValidExceptionResp(errors);
}
private <T> DataResult<T> createValidExceptionResp(List<ObjectError> errors) {
String[] msgs = new String[errors.size()];
int i = 0;
for (ObjectError error : errors) {
msgs[i] = error.getDefaultMessage();
log.info("msg={}",msgs[i]);
i++;
}
return DataResult.getResult(BaseResponseCode.METHODARGUMENTNOTVALIDEXCEPTION.getCode(), msgs[0]);
}
}
package com.zxs.springbootmybatisflex.exception;
import com.zxs.springbootmybatisflex.exception.code.ResponseCodeInterface;
public class BusinessException extends RuntimeException{
/**
* 异常编号
*/
private final int messageCode;
/**
* 对messageCode 异常信息进行补充说明
*/
private final String detailMessage;
public BusinessException(int messageCode,String message) {
super(message);
this.messageCode = messageCode;
this.detailMessage = message;
}
/**
* 构造函数
* @param code 异常码
*/
public BusinessException(ResponseCodeInterface code) {
this(code.getCode(), code.getMsg());
}
public int getMessageCode() {
return messageCode;
}
public String getDetailMessage() {
return detailMessage;
}
}
package com.zxs.springbootmybatisflex.exception;
import com.zxs.springbootmybatisflex.exception.code.ResponseCodeInterface;
public class RoleSaveException extends RuntimeException{
/**
* 异常编号
*/
private final int messageCode;
/**
* 对messageCode 异常信息进行补充说明
*/
private final String detailMessage;
public RoleSaveException(int messageCode, String message) {
super(message);
this.messageCode = messageCode;
this.detailMessage = message;
}
/**
* 构造函数
* @param code 异常码
*/
public RoleSaveException(ResponseCodeInterface code) {
this(code.getCode(), code.getMsg());
}
public int getMessageCode() {
return messageCode;
}
public String getDetailMessage() {
return detailMessage;
}
}
package com.zxs.springbootmybatisflex.mapper;
import com.mybatisflex.core.BaseMapper;
import com.zxs.springbootmybatisflex.entity.User;
import org.apache.ibatis.annotations.Mapper;
@Mapper
public interface UserMapper extends BaseMapper<User> {
}
package com.zxs.springbootmybatisflex.service.impl;
import com.mybatisflex.core.query.QueryWrapper;
import com.mybatisflex.spring.service.impl.ServiceImpl;
import com.zxs.springbootmybatisflex.entity.User;
import com.zxs.springbootmybatisflex.mapper.UserMapper;
import com.zxs.springbootmybatisflex.service.UserService;
import org.springframework.stereotype.Service;
import static com.zxs.springbootmybatisflex.entity.table.UserTableDef.USER;
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {
@Override
public User selectUserById(Long id) {
return getById(id);
}
@Override
public User selectUserById2(Long id) {
QueryWrapper queryWrapper = QueryWrapper.create().where(USER.ID.eq(id));
return getOne(queryWrapper);
}
@Override
public void deleteUser(Long id) {
removeById(id);
}
@Override
public void deleteUser3(Long id) {
QueryWrapper queryWrapper = QueryWrapper.create().where(USER.ID.eq(id));
remove(queryWrapper);
}
}
package com.zxs.springbootmybatisflex.service;
import com.mybatisflex.core.service.IService;
import com.zxs.springbootmybatisflex.entity.User;
public interface UserService extends IService<User> {
User selectUserById(Long id);
User selectUserById2(Long id);
void deleteUser(Long id);
void deleteUser3(Long id);
}
package com.zxs.springbootmybatisflex.uitl;
import com.zxs.springbootmybatisflex.exception.code.BaseResponseCode;
import com.zxs.springbootmybatisflex.exception.code.ResponseCodeInterface;
import lombok.Data;
@Data
public class DataResult<T>{
/**
* 请求响应code，0为成功 其他为失败
*/
private int code;
/**
* 响应异常码详细信息
*/
private String msg;
/**
* 响应内容 ， code 0 时为 返回 数据
*/
private T data;
public DataResult(int code, T data) {
this.code = code;
this.data = data;
this.msg=null;
}
public DataResult(int code, String msg, T data) {
this.code = code;
this.msg = msg;
this.data = data;
}
public DataResult(int code, String msg) {
this.code = code;
this.msg = msg;
this.data=null;
}
public DataResult() {
this.code= BaseResponseCode.SUCCESS.getCode();
this.msg=BaseResponseCode.SUCCESS.getMsg();
this.data=null;
}
public DataResult(T data) {
this.data = data;
this.code=BaseResponseCode.SUCCESS.getCode();
this.msg=BaseResponseCode.SUCCESS.getMsg();
}
public DataResult(ResponseCodeInterface responseCodeInterface) {
this.data = null;
this.code = responseCodeInterface.getCode();
this.msg = responseCodeInterface.getMsg();
}
public DataResult(ResponseCodeInterface responseCodeInterface, T data) {
this.data = data;
this.code = responseCodeInterface.getCode();
this.msg = responseCodeInterface.getMsg();
}
public static <T>DataResult success(){
return new <T>DataResult();
}
public static <T>DataResult success(T data){
return new <T>DataResult(data);
}
public static <T>DataResult getResult(int code,String msg,T data){
return new <T>DataResult(code,msg,data);
}
public static <T>DataResult getResult(int code,String msg){
return new <T>DataResult(code,msg);
}
public static <T>DataResult getResult(BaseResponseCode responseCode){
return new <T>DataResult(responseCode);
}
public static <T>DataResult getResult(BaseResponseCode responseCode,T data){
return new <T>DataResult(responseCode,data);
}
}
package com.zxs.springbootmybatisflex;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
@MapperScan("com.zxs.springbootmybatisflex.mapper")
public class SpringbootMybatisFlexApplication {
public static void main(String[] args) {
SpringApplication.run(SpringbootMybatisFlexApplication.class, args);
}
}
![Vue [Day6]](https://img-blog.csdnimg.cn/c4ec03e6d0a2450890eb83fc51539d91.png)
