springBoot+mybatisPlus小demo
阿新 • • 發佈：2018-12-17
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/
----------------------------------------------------------分割線---------------------------------------------
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。
