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准备工作
准备如下一个数据表
CREATE TABLE `student` ( `id` varchar(32) NOT NULL, `gender` varchar(32) DEFAULT NULL, `age` int(12) DEFAULT NULL, `nick_name` varchar(32) DEFAULT NULL, `name` varchar(32) DEFAULT NULL, PRIMARY KEY (`id`)) ENGINE=InnoDB DEFAULT CHARSET=utf8;插入几条测试数据
整合步骤
工程的完整包结构如图所示
导入maven依赖
<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.1.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> <mysql-connector-java.version>8.0.11</mysql-connector-java.version> <commons-lang3.version>3.7</commons-lang3.version> <fastjson.version>1.2.47</fastjson.version> <mybatis-plus-boot-starter.version>3.3.0</mybatis-plus-boot-starter.version> <mybatis-plus-generator.version>3.3.0</mybatis-plus-generator.version> <druid.version>1.1.14</druid.version> <lombok.version>1.18.0</lombok.version> <dubbo-spring-boot-starter.version>2.0.0</dubbo-spring-boot-starter.version> <swagger.version>2.9.2</swagger.version> <swagger-bootstrap-ui.version>1.9.6</swagger-bootstrap-ui.version> </properties> <dependencies> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>3.4</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!--mysql依赖--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql-connector-java.version}</version> </dependency> <!--阿里巴巴fastjosn依赖--> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>${fastjson.version}</version> </dependency> <!--阿里巴巴数据库连接池依赖--> <!-- Druid --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <version>${druid.version}</version> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.1.1</version> </dependency> <!-- MyBatis增强工具--> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>${mybatis-plus-boot-starter.version}</version> </dependency> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-generator</artifactId> <version>${mybatis-plus-generator.version}</version> </dependency> <!-- lombok --> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>${lombok.version}</version> </dependency> <!--swagger-ui--> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger2</artifactId> <version>${swagger.version}</version> </dependency> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger-ui</artifactId> <version>${swagger.version}</version> </dependency> <dependency> <groupId>com.github.xiaoymin</groupId> <artifactId>swagger-bootstrap-ui</artifactId> <version>${swagger-bootstrap-ui.version}</version> </dependency> </dependencies>配置文件 application.yml
server: port: 8083logging: config: classpath:logback-spring.xml #日志spring: datasource: driver-class-name: com.mysql.cj.jdbc.Driver url: jdbc:mysql://IP:3306/school?autoReconnect=true&useUnicode=true&characterEncoding=utf8&serverTimezone=GMT%2B8&useSSL=false username: root password: root druid: max-active: 100 initial-size: 10 max-wait: 60000 min-idle: 5 #设置单个文件最大上传大小 servlet: multipart: max-file-size: 20MBmybatis-plus: mapper-locations: classpath*:mapper@Configuration@EnableSwagger2public class ApiSwagger2 { @Bean public Docket createRestBmbsApi() { return new Docket(DocumentationType.SWAGGER_2) .groupName("users") .apiInfo(apiInfo()) .select() .apis(RequestHandlerSelectors.basePackage("com.congge.controller")) .paths(PathSelectors.any()) .build(); } private ApiInfo apiInfo() { return new ApiInfoBuilder() .title("后端相关API") .version("1.0") .build(); } }实体类
import com.baomidou.mybatisplus.annotation.TableField;import lombok.Data; @Datapublic class Student { @TableField("id") private String id; @TableField("name") private String name; @TableField("gender") private String gender; @TableField("age") private int age; @TableField("nick_name") private String nickName; }dao接口，里面添加一个查询所有数据的方法
import com.baomidou.mybatisplus.core.mapper.BaseMapper;import com.congge.entity.Student;import org.apache.ibatis.annotations.Mapper; import java.util.List; @Mapperpublic interface StudentMapper extends BaseMapper<Student> { List<Student> queryAll(); }mybatis层，写sql的文件
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="com.congge.dao.StudentMapper"> <select id="queryAll" resultType="com.congge.entity.Student">select * from student</select> </mapper>业务实现类
在本次的业务实现中，同时可以使用mybatis的方式以及mybatis-plus的方式进行，具体使用的时候结合自身的需求进行选择；
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;import com.congge.dao.StudentMapper;import com.congge.entity.Student;import com.congge.service.StudentService;import org.springframework.stereotype.Service; import javax.annotation.Resource;import java.util.List; @Servicepublic class StudentServiceImpl implements StudentService { @Resource private StudentMapper studentMapper; @Override public List<Student> queryAllStudent() { QueryWrapper<Student> queryWrapper = new QueryWrapper(); List<Student> students = studentMapper.selectList(queryWrapper); return students; //return studentMapper.queryAll(); } @Override public List<Student> getByName(String name) { QueryWrapper<Student> queryWrapper = new QueryWrapper(); queryWrapper.like("name",name); return studentMapper.selectList(queryWrapper); } public Student getById(String id) { QueryWrapper<Student> queryWrapper = new QueryWrapper(); queryWrapper.like("id",id); return studentMapper.selectOne(queryWrapper); }}添加一个测试接口
@RestControllerpublic class StudentController { @Autowired private StudentService studentService; @GetMapping("/getAll") public List<Student> getAll(){ return studentService.queryAllStudent(); } @GetMapping("/getByName") public List<Student> getByName(@RequestParam String name){ return studentService.getByName(name); } @GetMapping("/getById") public Student getById(@RequestParam String id){ return studentService.getById(id); }}启动类
import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplicationpublic class App { public static void main(String[] args) { SpringApplication.run(App.class,args); } }接下来，将工程运行起来做一下测试吧
启动之后，打开swagger界面
不妨随机测试两个接口吧，测试下获取所有学生的数据接口
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