How SpringBoot builds API documentation based on Swagger2

1. Add dependencies

<!--SpringBoot使用Swagger2构建API文档的依赖-->
    <dependency>
      <groupid>io.springfox</groupid>
      <artifactid>springfox-swagger2</artifactid>
      <version>2.7.0</version>
    </dependency>

    <dependency>
      <groupid>io.springfox</groupid>
      <artifactid>springfox-swagger-ui</artifactid>
      <version>2.7.0</version>
    </dependency>

2. Create Swagger2 configuration class

package com.offcn.config;

import org.springframework.context.annotation.Configuration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

@Configuration//表示该类为一个配置类，相当于spring中的xml配置文件
@EnableSwagger2 //开启在线文档
public class SwaggerConfig {

  //1.声明 api 文档的属性
  private ApiInfo apiInfo() {
    return new ApiInfoBuilder()
        .title("Spring Boot中使用Swagger2构建RESTful APIs")
        .description("优就业")
        .termsOfServiceUrl("http://www.ujiuye.com/")
        .contact("小刘同学")
        .version("1.0")
        .build();
  }

  //配置核心配置信息
  public Docket createRestApi() {
    return new Docket(DocumentationType.SWAGGER_2)
        .apiInfo(apiInfo())
        .select()
        .apis(RequestHandlerSelectors.basePackage("com.offcn.controller"))
        .paths(PathSelectors.any())
        .build();
  }
}

3. Modify the Controller and add documentation comments

Add descriptions to the API through the @ApiOperation annotation

Add descriptions to the parameters through the @ApiImplicitParams@ApiImplicitParam annotation

package com.offcn.controller;

import com.offcn.dao.UserDao;
import com.offcn.entity.User;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiImplicitParams;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RequestMapping("/rest")
@RestController
public class RestFulController {

  @Autowired
  private UserDao userDao;

  @GetMapping("/getUserById")
  @ApiOperation(value="查找指定id用户信息", notes="根据id查找用户信息")
  @ApiImplicitParams({
      @ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Integer"),
  })
  public User getUserById(Integer id){
    User user = userDao.getOne(id);
    return user;
  }

  @DeleteMapping("/del")
  @ApiOperation(value="删除指定id用户信息", notes="根据id删除用户信息")
  @ApiImplicitParams({
      @ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Integer"),
  })
  public String delUserById(Integer id){
    userDao.deleteById(id);
    return "success";
  }
}

4. View Swagger2 documentation

Restart the project

Visit:

http://localhost :8080/swagger-ui.html

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