springBoot+mybatisPlus小demo

SpringBoot 資料庫 · 發表 2018-10-24 13:24:00

摘要：專案介紹：採用restful api進行介面規範 / 專案框架SpringBoot+mybatis Plus / 採用mysql進行資料儲存 / 採用swaggerUI進行前後端業務分離式開發。開發環境：JDK1.8+Mysql8.0.12+IDEAL 實現功能：springboot...

專案介紹：採用restful api進行介面規範 / 專案框架SpringBoot+mybatis Plus / 採用mysql進行資料儲存 / 採用swaggerUI進行前後端業務分離式開發。

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

專案介紹：無實際的業務操作，都是測試功能。其中為了區別mybastis和mybatisPlus，特意寫了兩個介面分別採用mapper.xml進行dao層操作和採用Iservice提供的CRUD操作進行資料查詢。

ps:如果對springboot和mybayisPlus已瞭解，可直接訪問碼雲進行demo下載 https://gitee.com/xc199534/SpringBootMybatisPlus/

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1.專案整體結構

其中Config中包括MybatisPlusConfig和SwaggerConfig兩個類，分別用於初始化MybatisPlus和Swagger基礎設定。

資料庫結構，採用navicat進行視覺化管理。

2.配置檔案application.properties

也可採用.yml格式進行配置檔案設定，本專案是使用.properties。

spring.application.name=spring-boot-config
server.port=8080
server.context-path=/

#mybatis mapper檔案的位置
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的配置檔案的位置，
#mybatis.config-location=classpath:mybatis-config.xml

#資料庫引數設定
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

3.pom.xml內容（所有不上專案完整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資料庫連線池 -->
<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>

3.自動生成程式碼(Dao/service/Entity)

呼叫MpGenerator.java的主函式生成定義好MVC層結構(MpGenerator定義了檔案位置，檔名稱，依賴關係等屬性)。

Dao層：生成*Dao.java檔案和*Dao.xml，後者可理解為Dao層的資料庫對映操作,mybatis支援在.xml檔案中寫資料庫CURD語句，但myatisPlus支援使用內建的CRUD操作，避免了複雜的資料庫語句。

Service層：生成一個介面檔案，一個介面實現類。

Entity層：生成實體類，對應到資料庫的表結構。

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 {
@Override
public 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;
}

@Override
public String toString() {
return "School{" +
"id=" + id +
", name='" + name +
", range=" + range +
", age=" + age +
'}';
}
}

View Code

4、Controller層


@RestController
@RequestMapping("/")
public class SampleController {
@Autowired
private UserService userService;

@Autowired
private SchoolService schoolService;

@Autowired
private testDao testdao;

@Autowired
private 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 = "採取mybatis方式查詢")
@ApiImplicitParam(name = "id", value = "使用者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 = "採取mybatis-plus方式查詢")
@ApiImplicitParam(name = "id", value = "使用者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 = "插入資料")
@ApiImplicitParam(name = "school", value = "學校資訊", 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

5、呼叫主程式啟動

@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);
}
}

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

springBoot+mybatisPlus小demo

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