項目介紹：采用restful api進行接口規范 / 項目框架SpringBoot+mybatis Plus / 采用mysql進行數據存儲 / 采用swaggerUI進行前后端業務分離式開發。

開發環境：JDK1.8+Mysql8.0.12+IDEAL

實現功能：springboot搭建整體框架，MybatisPlus動態生成Dao+Services+Entity+Controller結構

項目介紹：無實際的業務操作，都是測試功能。其中為了區別mybastis和mybatisPlus，特意寫了兩個接口分別采用mapper.xml進行dao層操作和采用Iservice提供的CRUD操作進行數據查詢。

ps:如果對springboot和mybayisPlus已了解，可直接訪問碼云進行demo下載 https://gitee.com/xc199534/SpringBootMybatisPlus/

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1.項目整體結構

其中Config中包括MybatisPlusConfig和SwaggerConfig兩個類，分別用于初始化MybatisPlus和Swagger基礎設置。

數據庫結構，采用navicat進行可視化管理。

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2.配置文件application.properties

也可采用.yml格式進行配置文件設置，本項目是使用.properties。

spring.application.name=spring-boot-config server.port=8080 server.context-path=/#mybatis mapper文件的位置 mybatis.mapper-locations=classpath*:mapper/*.xml #掃描pojo類的位置,在此處指明掃描實體類的包，在mapper中就可以不用寫pojo類的全路徑名了 mybatis.type-aliases-package=com.example.demo #可以通過mybatis.config-location屬性來指定mybatis的配置文件的位置， #mybatis.config-location=classpath:mybatis-config.xml
#數據庫參數設置 jdbc.type=mysql spring.datasource.url=jdbc:mysql://localhost:3306/demo spring.datasource.username=root spring.datasource.password=root spring.datasource.driver-class-name=com.mysql.jdbc.Driver

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3.pom.xml內容（所有不上項目完整pom.xml的demo都是耍流氓）

<dependencies><!-- Springboot--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>org.springframework.data</groupId><artifactId>spring-data-elasticsearch</artifactId></dependency><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><!-- <version>2.1.3</version> --></dependency><dependency><groupId>net.java.dev.jna</groupId><artifactId>jna</artifactId><!-- <version>3.0.9</version> --></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-redis</artifactId><scope>provided</scope></dependency><!-- 阿里巴巴druid數據庫連接池 --><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.1.10</version></dependency><!-- mysql驅動 --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId></dependency><!-- mybatisplus與springboot整合 --><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-boot-starter</artifactId><version>2.3</version></dependency><!-- 模板引擎 --><dependency><groupId>org.apache.velocity</groupId><artifactId>velocity</artifactId><version>1.7</version></dependency><!--swagger--><dependency><groupId>io.springfox</groupId><artifactId>springfox-swagger2</artifactId><version>2.9.2</version></dependency><dependency><groupId>io.springfox</groupId><artifactId>springfox-swagger-ui</artifactId><version>2.9.2</version></dependency></dependencies>

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3.自動生成代碼(Dao/service/Entity)

調用MpGenerator.java的主函數生成定義好MVC層結構(MpGenerator定義了文件位置，文件名稱，依賴關系等屬性)。

Dao層：生成*Dao.java文件和*Dao.xml，后者可理解為Dao層的數據庫映射操作,mybatis支持在.xml文件中寫數據庫CURD語句，但myatisPlus支持使用內置的CRUD操作，避免了復雜的數據庫語句。

Service層 ：生成一個接口文件，一個接口實現類。

Entity層：生成實體類，對應到數據庫的表結構。

SchoolDao.java

package com.example.demo.dao;import com.baomidou.mybatisplus.mapper.BaseMapper; import com.example.demo.entity.School; import org.apache.ibatis.annotations.Param; import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;public interface SchoolDao extends BaseMapper<School> {School getSchoolById(@Param("id") int id); } View Code

SchoolService.java

import com.baomidou.mybatisplus.service.IService; import com.example.demo.entity.School; import org.elasticsearch.index.query.QueryStringQueryBuilder;public interface SchoolService extends IService<School> {public School getSchoolById(int id);// public Iterable<School> searchByES(QueryStringQueryBuilder builder); } View Code

SchoolServiceImpl.java

import com.baomidou.mybatisplus.service.impl.ServiceImpl; import com.example.demo.dao.SchoolDao; import com.example.demo.entity.School; import com.example.demo.services.SchoolService; import org.elasticsearch.index.query.QueryStringQueryBuilder; import org.springframework.stereotype.Service;import java.util.List;@Service public class SchoolServiceImpl extends ServiceImpl<SchoolDao, School> implements SchoolService {@Overridepublic School getSchoolById(int id) {return baseMapper.selectById(id);} } View Code

School.java

import com.baomidou.mybatisplus.annotations.TableField; import com.baomidou.mybatisplus.annotations.TableId; import com.baomidou.mybatisplus.annotations.TableName; import org.springframework.data.elasticsearch.annotations.Document;import java.io.Serializable;@TableName("school") @Document(indexName = "education", type = "school") public class School implements Serializable {@TableId("ID")private int id;@TableField("NAME")private String name;@TableField("RANGE")private int range;@TableField("AGE")private int age;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getRange() { return range; }public void setRange(int range) { this.range = range; }public int getAge() {return age;}public void setAge(int age) {this.age = age;}@Overridepublic String toString() {return "School{" +"id=" + id +", name='" + name +", range=" + range +", age=" + age +'}';} } View Code

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4、Controller層

@RestController @RequestMapping("/") public class SampleController {@Autowiredprivate UserService userService;@Autowiredprivate SchoolService schoolService;@Autowiredprivate testDao testdao;@Autowiredprivate ElasticsearchTemplate elasticsearchTemplate;@ApiOperation(value = "測試")@GetMapping("/home")String home() {return "Hello World!";}@RequestMapping(value = "/getUser", method = RequestMethod.GET)public User helloUser() {User user = userService.getUserById(1);System.out.println(user);return user;}@ApiOperation(value = "采取mybatis方式查詢")@ApiImplicitParam(name = "id", value = "用戶id", paramType = "path", required = true)@GetMapping("/getSchool/maybatis/{id}")public School helloSchool1(@PathVariable("id") int id) {School school = schoolService.getSchoolById(id);System.out.println(school);return school;}@ApiOperation(value = "采取mybatis-plus方式查詢")@ApiImplicitParam(name = "id", value = "用戶id", paramType = "path", required = true)@GetMapping("/getSchool/maybatis-plus/{id}")public School helloSchool2(@PathVariable("id") int id) {School school = schoolService.selectById(id);System.out.println(school);return school;}@ApiOperation(value = "插入數據")@ApiImplicitParam(name = "school", value = "學校信息", paramType = "body", required = true)@PostMapping("/insert/school")public Boolean insertSchool(@RequestBody School school) {Boolean tag = schoolService.insert(school);System.out.println(tag);return tag;} } View Code

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5、調用主程序啟動

@SpringBootApplication @MapperScan("com.example.demo.dao") @ComponentScan(basePackages = {"com.example.demo.config","com.example.demo.controller","com.example.demo.services"}) public class DemoApplication {public static void main(String[] args) {//System.setProperty("es.set.netty.runtime.available.processors", "false");SpringApplication.run(DemoApplication.class, args);} }

?啟動成功后訪問：http://localhost:8080/swagger-ui.html#/，顯示下圖效果即配置成功。

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轉載于:https://www.cnblogs.com/xiongchang95/p/9840164.html

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