spring boot 整合Swagger2 构建API文档

1.pom.xml中引入依赖

<dependency>
           <groupId>io.springfox</groupId>
           <artifactId>springfox-swagger2</artifactId>
           <version>2.2.2</version>
        </dependency>
        <dependency>
           <groupId>io.springfox</groupId>
           <artifactId>springfox-swagger-ui</artifactId>
           <version>2.2.2</version>
        </dependency>   

2.创建Swagger2配置类

@Configuration
@EnableSwagger2
public class SwaggerConfig {
    @Bean
    public Docket apiDoc() {
        return docket();
    }

    private Docket docket() {
        return new Docket(DocumentationType.SWAGGER_2).select()
                .apis(RequestHandlerSelectors.withClassAnnotation(RestController.class))//这里采用包含注解的方式来确定要显示的接口
                //.apis(RequestHandlerSelectors.basePackage("com.fz.hr.modules.system.controller"))    //这里采用包扫描的方式来确定要显示的接口
                .build().ignoredParameterTypes(Errors.class).apiInfo(apiInfo());
        
    }

    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("springboot利用swagger构建api文档")
                .description("简单优雅的restfun风格")
                .version("1.0")
                .build();
    }
}

3.给接口添加注解

@RestController
public class UserController {

	// 创建线程安全的Map
	static Map<Integer, User> users = Collections.synchronizedMap(new HashMap<Integer, User>());

	/**
	 * 根据ID查询用户
	 * @param id
	 * @return
	 */
	@ApiOperation(value="获取用户详细信息", notes="根据url的id来获取用户详细信息")
	@ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Integer", paramType = "path")
	@RequestMapping(value = "user/{id}", method = RequestMethod.GET)
	public ResponseEntity<JsonResult> getUserById (@PathVariable(value = "id") Integer id){
		JsonResult r = new JsonResult();
		try {
			User user = users.get(id);
			r.setResult(user);
			r.setStatus("ok");
		} catch (Exception e) {
			r.setResult(e.getClass().getName() + ":" + e.getMessage());
			r.setStatus("error");
			e.printStackTrace();
		}
		return ResponseEntity.ok(r);
	}

	/**
	 * 查询用户列表
	 * @return
	 */
	@ApiOperation(value="获取用户列表", notes="获取用户列表")
	@RequestMapping(value = "users", method = RequestMethod.GET)
	public ResponseEntity<JsonResult> getUserList (){
		JsonResult r = new JsonResult();
		try {
			List<User> userList = new ArrayList<User>(users.values());
			r.setResult(userList);
			r.setStatus("ok");
		} catch (Exception e) {
			r.setResult(e.getClass().getName() + ":" + e.getMessage());
			r.setStatus("error");
			e.printStackTrace();
		}
		return ResponseEntity.ok(r);
	}

	/**
	 * 添加用户
	 * @param user
	 * @return
	 */
	@ApiOperation(value="创建用户", notes="根据User对象创建用户")
	@ApiImplicitParam(name = "user", value = "用户详细实体user", required = true, dataType = "User")
	@RequestMapping(value = "user", method = RequestMethod.POST)
	public ResponseEntity<JsonResult> add (@RequestBody User user){
		JsonResult r = new JsonResult();
		try {
			users.put(user.getId(), user);
			r.setResult(user.getId());
			r.setStatus("ok");
		} catch (Exception e) {
			r.setResult(e.getClass().getName() + ":" + e.getMessage());
			r.setStatus("error");

			e.printStackTrace();
		}
		return ResponseEntity.ok(r);
	}

	/**
	 * 根据id删除用户
	 * @param id
	 * @return
	 */
	@ApiOperation(value="删除用户", notes="根据url的id来指定删除用户")
	@ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Long", paramType = "path")
	@RequestMapping(value = "user/{id}", method = RequestMethod.DELETE)
	public ResponseEntity<JsonResult> delete (@PathVariable(value = "id") Integer id){
		JsonResult r = new JsonResult();
		try {
			users.remove(id);
			r.setResult(id);
			r.setStatus("ok");
		} catch (Exception e) {
			r.setResult(e.getClass().getName() + ":" + e.getMessage());
			r.setStatus("error");

			e.printStackTrace();
		}
		return ResponseEntity.ok(r);
	}

	/**
	 * 根据id修改用户信息
	 * @param user
	 * @return
	 */
	@ApiOperation(value="更新信息", notes="根据url的id来指定更新用户信息")
	@ApiImplicitParams({
			@ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Long",paramType = "path"),
			@ApiImplicitParam(name = "user", value = "用户实体user", required = true, dataType = "User")
	})
	@RequestMapping(value = "user/{id}", method = RequestMethod.PUT)
	public ResponseEntity<JsonResult> update (@PathVariable("id") Integer id, @RequestBody User user){
		JsonResult r = new JsonResult();
		try {
			User u = users.get(id);
			u.setUsername(user.getUsername());
			u.setAge(user.getAge());
			users.put(id, u);
			r.setResult(u);
			r.setStatus("ok");
		} catch (Exception e) {
			r.setResult(e.getClass().getName() + ":" + e.getMessage());
			r.setStatus("error");

			e.printStackTrace();
		}
		return ResponseEntity.ok(r);
	}

	@ApiIgnore//使用该注解忽略这个API
	@RequestMapping(value = "/hi", method = RequestMethod.GET)
	public String  jsonTest() {
		return " hi you!";
	}
}
Json格式输出类 JsonResult.class

package cn.saytime.bean;

public class JsonResult {

	private String status = null;

	private Object result = null;

	// Getter Setter
}
实体User.class

package cn.saytime.bean;

import java.util.Date;

/**
 * @author zh
 * @ClassName cn.saytime.bean.User
 * @Description
 */
public class User {

	private int id;
	private String username;
	private int age;
	private Date ctm;

	// Getter Setter
}

4. 启动SpringBoot项目，访问  http://localhost:8080/swagger-ui.html