技术分享 | 数据持久化技术(Java)

本章介绍 Web 后端开发中数据持久化技术 TKMyBatis。 TKMyBatis简介 TKMybatis …

本章介绍 Web 后端开发中数据持久化技术 TKMyBatis。

TKMyBatis简介

TKMybatis 是基于 Mybatis 框架开发的一个工具,内部实现了对单表的基本数据操作,只需要简单继承 TKMybatis 提供的接口,就能够实现无需编写任何 sql 即能完成单表操作。

下面简单介绍下 MyBatis , MyBatis 是一款优秀的持久层框架,它支持自定义 SQL、存储过程以及高级映射。MyBatis 免除了几乎所有的 JDBC 代码以及设置参数和获取结果集的工作。MyBatis 可以通过简单的 XML 或注解来配置和映射原始类型、接口和 Java POJO(Plain Old Java Objects,普通老式 Java 对象)为数据库中的记录。

详细内容请参考 https://mybatis.org/mybatis-3/zh/index.html

TKMyBatis快速开始

在实体类中,常用的注解和意义为:
Table:描述数据库表信息,主要属性有 name(表名)、schema、catalog、uniqueConstraints 等。
Id:指定表主键字段,没有属性值。
Column:描述数据库字段信息,主要属性有 name(字段名)、columnDefinition、insertable、length、nullable(是否可为空)、precision、scale、table、unique、updatable 等。

ColumnType:描述数据库字段类型,可对一些特殊类型作配置,进行特殊处理,主要属性有 jdbcType、column、typeHandler 等。

  • 创建业务 Mapper 公共接口
  • 首先创建一个公共接口,继承 Mapper, MySqlMapper, IdsMapper 三个类,用于后续业务 Mapper 接口直接实现。
  • import tk.mybatis.mapper.common.IdsMapper;
  • import tk.mybatis.mapper.common.Mapper;
  • import tk.mybatis.mapper.common.MySqlMapper;
    public interface MySqlExtensionMapper extends Mapper, MySqlMapper, IdsMapper {
    }

import com.hogwartsmini.demo.common.MySqlExtensionMapper;
import com.hogwartsmini.demo.entity.HogwartsTestUser;
import org.springframework.stereotype.Repository;

@Repository
public interface HogwartsTestUserMapper extends MySqlExtensionMapper {

spring:
application:
name: aitest
#数据库配置信息
datasource:
url: jdbc:mysql://localhost:3306/aitest_mini?allowMultiQueries=true&useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
username: hogwarts
password: db@hogwarts
driver-class-name: com.mysql.cj.jdbc.Driver
mybatis:
mapper-locations: classpath:mapper/*.xml
type-aliases-package: com.hogwartstest.aitestmini.entity
configuration:
mapUnderscoreToCamelCase: true
logging:
level:
com.hogwartstest.aitestmini.dao: debug #打印sql

CREATE TABLE hogwarts_test_user (
id int NOT NULL AUTO_INCREMENT COMMENT ‘主键’,
user_name varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL COMMENT ‘用户名’,
password varchar(32) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL COMMENT ‘密码’,
email varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT NULL COMMENT ‘邮箱’,
auto_create_case_job_name varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT NULL COMMENT ‘自动生成用例job名称 不为空时表示已经创建job’,
start_test_job_name varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT NULL COMMENT ‘执行测试job名称 不为空时表示已经创建job’,
default_jenkins_id int DEFAULT NULL COMMENT ‘默认Jenkins服务器’,
create_time datetime NOT NULL COMMENT ‘创建时间’,
update_time datetime NOT NULL COMMENT ‘更新时间’,
PRIMARY KEY (id) USING BTREE
) ENGINE=InnoDB AUTO_INCREMENT=12 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci ROW_FORMAT=DYNAMIC COMMENT=‘用户表’;

import com.hogwartsmini.demo.entity.HogwartsTestUser;
import com.hogwartsmini.demo.service.HogwartsTestUserService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

/**

  • @Author tlibn
    • @Date 2020/7/16 17:14
  • **/
  • @Api(tags = “霍格沃兹测试学院-用户管理模块”)
  • @RestController
  • @RequestMapping(“hogwartsUser”)
  • public class HogwartsTestUserDbController {
    @Autowired
    private HogwartsTestUserService hogwartsTestUserService;
    @ApiOperation(“用户注册”)
    @PostMapping(“register”)
    public HogwartsTestUser register(
    @RequestBody HogwartsTestUser hogwartsTestUser){
    return hogwartsTestUserService.save(hogwartsTestUser);
    }
    @ApiOperation(“用户信息修改接口”)
    @PutMapping()
    public HogwartsTestUser updateUserInfo(
    @RequestBody HogwartsTestUser hogwartsTestUser){
    return hogwartsTestUserService.update(hogwartsTestUser);
    }
    @ApiOperation(“根据用户id删除用户信息”)
    @DeleteMapping(“{userId}”)
    public Integer delete(@PathVariable(“userId”) Integer userId){
    return hogwartsTestUserService.delete(userId);
    }
    @ApiOperation(“根据用户名查询”)
    @GetMapping(“byName”)
    public List getByName(
    @RequestParam(“userName”) String userName){
    HogwartsTestUser hogwartsTestUser = new HogwartsTestUser();
    hogwartsTestUser.setUserName(userName);
    return hogwartsTestUserService.getByName(hogwartsTestUser);
    }

import com.hogwartsmini.demo.entity.HogwartsTestUser;

import java.util.List;

public interface HogwartsTestUserService {

import com.hogwartsmini.demo.dao.HogwartsTestUserMapper;
import com.hogwartsmini.demo.entity.HogwartsTestUser;
import com.hogwartsmini.demo.service.HogwartsTestUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Date;
import java.util.List;

/**

  • @Author tlibn
    • @Date 2020/7/17 11:03
  • **/
  • @Service
  • public class HogwartsTestUserServiceImpl implements HogwartsTestUserService {
    @Autowired
    private HogwartsTestUserMapper hogwartsTestUserMapper;
    /**
    * 保存
    * *
    * * @param hogwartsTestUser
    * * @return
    * /
    * @Override
    * public HogwartsTestUser save(HogwartsTestUser hogwartsTestUser) {
    * hogwartsTestUser.setCreateTime(new Date());
    * hogwartsTestUser.setUpdateTime(new Date());
    * hogwartsTestUserMapper.insertUseGeneratedKeys(hogwartsTestUser);
    * return hogwartsTestUser;
    * }
    /
    *
    * 更新
    * *
    * * @param hogwartsTestUser
    * * @return
    * /
    * @Override
    * public HogwartsTestUser update(HogwartsTestUser hogwartsTestUser) {
    * hogwartsTestUser.setCreateTime(new Date());
    * hogwartsTestUser.setUpdateTime(new Date());
    * hogwartsTestUserMapper.updateByPrimaryKeySelective(hogwartsTestUser);
    * return hogwartsTestUser;
    * }
    /
    *
    * 根据用户名查询
    * *
    * * @param hogwartsTestUser
    * * @return
    * /
    * @Override
    * public List getByName(HogwartsTestUser hogwartsTestUser) {
    * List hogwartsTestUserList = hogwartsTestUserMapper.select(hogwartsTestUser);
    * return hogwartsTestUserList;
    * }
    /
    *
    * 根据用户id删除用户信息
    * *
    * * @param userId
    * * @return
    * */
    * @Override
    * public Integer delete(Integer userId) {
    * HogwartsTestUser hogwartsTestUser = new HogwartsTestUser();
    * hogwartsTestUser.setId(userId);
    * hogwartsTestUserMapper.delete(hogwartsTestUser);
    * return userId;
    * }
    * }

响应参数

  • 查询
  • GET http://127.0.0.1:8081/hogwartsUser/byName?userName=霍格沃兹test123
  • 请求参数

响应参数

  • 修改
  • PUT http://127.0.0.1:8081/hogwartsUser
  • 请求参数
  • {
  • “id”: 15,
  • “userName”: “霍格沃兹test12345”,
  • “password”: “test123”
  • }

{
“id”: 15,
“userName”: “霍格沃兹test12345”,
“password”: “test123”,
“email”: null,
“autoCreateCaseJobName”: null,
“startTestJobName”: null,
“defaultJenkinsId”: null,
“createTime”: “2021-04-14T09:43:45.018+00:00”,
“updateTime”: “2021-04-14T09:43:45.018+00:00”
}

见请求地址中15

本文来自网络,不代表软粉网立场,转载请注明出处:https://www.rfff.net/p/8465.html

作者: HUI

发表评论

您的电子邮箱地址不会被公开。

返回顶部