Java Fluent Mybatis 项目工程化与常规操作详解

Java中常用的ORM框架主要是mybatis, hibernate, JPA等框架。国内又以Mybatis用的多，基于mybatis上的增强框架，又有mybatis plus和TK mybatis等。今天我们介绍一个新的mybatis增强框架 fluent mybatis

接着上一篇，上篇已经测试通过，成功添加了数据。那么这篇主要是继续上一个项目，将项目进行工程化包装，增加一些必要配置，并且生成增删改查接口。

GitHub代码仓库: GitHub仓库

Maven依赖

增加了druid 数据库连接池，所以之前的配置文件也需要调整，下面会发出来。

<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
<version>5.5.2</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.2.3</version>
</dependency>
<dependency>
<groupId>com.github.xiaoymin</groupId>
<artifactId>knife4j-spring-boot-starter</artifactId>
<version>3.0.2</version>
</dependency>

配置文件调整

原来的application.properties就不用了，换成yml，看得清楚一点。

server:
port: 8080
spring:
application:
name: fluent
datasource:
druid:
db-type: mysql
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://192.168.0.108:3306/test?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=false&verifyServerCertificate=false&allowMultiQueries=true&serverTimezone=GMT%2b8
username: root
password: 123456
# 使用druid数据源
# 下面为连接池的补充设置，应用到上面所有数据源中
# 初始化大小，最小，最大
initialSize: 10
minIdle: 10
maxActive: 200
# 配置获取连接等待超时的时间
maxWait: 6000
# 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
timeBetweenEvictionRunsMillis: 60000
# 配置一个连接在池中最小生存的时间，单位是毫秒
minEvictableIdleTimeMillis: 100000
validationQuery: SELECT 1 FROM DUAL
testWhileIdle: true
testOnBorrow: false
testOnReturn: false
# 打开PSCache，并且指定每个连接上PSCache的大小
poolPreparedStatements: true
maxPoolPreparedStatementPerConnectionSize: 20
# 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
filters: stat,wall,slf4j
# 通过connectProperties属性来打开mergeSql功能；慢SQL记录
connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
# 合并多个DruidDataSource的监控数据
#useGlobalDataSourceStat: true

Knife4j配置

这部分配置主要是为了后面调试接口方便。

import com.github.xiaoymin.knife4j.spring.annotations.EnableKnife4j;
import com.hy.fmp.dto.Result;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.web.ServerProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import springfox.bean.validators.configuration.BeanValidatorPluginsConfiguration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.oas.annotations.EnableOpenApi;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.Contact;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger.web.UiConfiguration;
import springfox.documentation.swagger.web.UiConfigurationBuilder;

import java.util.HashMap;

@EnableOpenApi
@Configuration
@EnableKnife4j
@Import(BeanValidatorPluginsConfiguration.class)
public class SwaggerConfig {

@Value("${knife4j.enable:true}")
private boolean enable;

@Bean
UiConfiguration uiConfig() {
return UiConfigurationBuilder.builder().build();
}

@Bean
public Docket nlpRestApi(ServerProperties serverProperties) {
return new Docket(DocumentationType.OAS_30)
.enable(enable)
.apiInfo(apiInfo("FluentMybatis测试服务接口"))
.pathMapping(serverProperties.getServlet().getContextPath())
.groupName("FluentMybatis测试")
.select()
.apis(RequestHandlerSelectors.basePackage("com.hy.fmp.ctrl"))
.paths(PathSelectors.any())
.build();
}

private ApiInfo apiInfo(String title) {
return new ApiInfoBuilder()
// 标题
.title(title)
// 描述
.description("所有的接口响应在现有接口定义外包装了一层标准结构:" + Result.ok(new HashMap<>(1)))
// 作者信息
.contact(new Contact("剑客阿良ALiang", "", "[email protected]"))
// 版本号
.version("1.0.0")
.build();
}
}

添加必要实体

增加control层接口返回实体以及错误码枚举类。

package com.hy.fmp.dto;

import cn.hutool.json.JSONUtil;
import lombok.AccessLevel;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@NoArgsConstructor(access = AccessLevel.PRIVATE)
public class Result<T> {
private String code = "0";
private String message = "请求成功";
private boolean success = true;
private T data;

public Result(String code, String message, boolean success) {
this.code = code;
this.message = message;
this.success = success;
}

public Result(String code, String message, boolean success, T data) {
this.code = code;
this.message = message;
this.success = success;
this.data = data;
}

public Result(T data) {
this.data = data;
}

/**
* 针对异常返回响应体
*
* @param success 是否成功
* @param code 错误码
* @param message 错误信息
*/
public Result(boolean success, String code, String message) {
this.success = success;
this.code = code;
this.message = message;
}

public static <T> Result<T> ok(T obj) {
return new Result<>(obj);
}

public static <T> Result<T> ok() {
return new Result<>();
}

public static <T> Result<T> error(String code, String message) {
return new Result<>(code, message, false);
}

public static <T> Result<T> error(String code, String message, T data) {
return new Result<>(code, message, false, data);
}

public Result<T> setMsg(String message) {
this.message = message;
return this;
}

@Override
public String toString() {
return JSONUtil.toJsonStr(this);
}
}

错误码枚举

package com.hy.fmp.enm;

/** @Author huyi @Date 2021/10/20 17:19 @Description: 报错code */
public enum ErrorCode {
/** 错误code */
BASE_ERROR_CODE("10001"),
;

private final String code;

ErrorCode(String code) {
this.code = code;
}

public String getCode() {
return code;
}
}

现在开始增加和修改表接口编写，一般来说，新增和修改的方法都定义为同一个。逻辑为如果传递数据主键，则为改，如果不传递，则为增。

package com.hy.fmp.service;

import com.hy.fmp.fluent.entity.TestFluentMybatisEntity;

/** @Author huyi @Date 2021/10/20 17:10 @Description: 基础操作接口 */
public interface IBaseService {
/**
* 新增/修改接口
*
* @param param 表实体
* @return 表实体
*/
TestFluentMybatisEntity insertOrUpdate(TestFluentMybatisEntity param);
}

接口实现类

package com.hy.fmp.service.Impl;

import com.hy.fmp.fluent.dao.intf.TestFluentMybatisDao;
import com.hy.fmp.fluent.entity.TestFluentMybatisEntity;
import com.hy.fmp.service.IBaseService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/** @Author huyi @Date 2021/10/20 17:10 @Description: 基础操作接口实现 */
@Slf4j
@Service
public class BaseServiceImpl implements IBaseService {

@Autowired private TestFluentMybatisDao testFluentMybatisDao;

@Override
public TestFluentMybatisEntity insertOrUpdate(TestFluentMybatisEntity param) {
testFluentMybatisDao.saveOrUpdate(param);
return param;
}
}

编写control层

package com.hy.fmp.ctrl;

import com.hy.fmp.dto.Result;
import com.hy.fmp.enm.ErrorCode;
import com.hy.fmp.fluent.entity.TestFluentMybatisEntity;
import com.hy.fmp.service.IBaseService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

/** @Author huyi @Date 2021/10/20 17:04 @Description: 基础操作 */
@Slf4j
@RestController
@RequestMapping("/base")
@Api(tags = "基础操作")
public class BaseController {
@Autowired private IBaseService baseService;

@ApiOperation(value = "插入/更新数据", notes = "插入/更新数据")
@RequestMapping(value = "/insertOrUpdate", method = RequestMethod.POST)
@ResponseBody
public Result<TestFluentMybatisEntity> insertOrUpdate(@RequestBody TestFluentMybatisEntity param) {
try {
return Result.ok(baseService.insertOrUpdate(param));
} catch (Exception exception) {
return Result.error(ErrorCode.BASE_ERROR_CODE.getCode(), exception.getMessage(), null);
}
}
}