16、springcloud整合Swagger2构建Restful服务的APIs

Spring Cloud将服务注册到了Eureka上，可以从Eureka的UI界面中，看到有哪些服务已经注册到了Eureka Server上；但是如果想查看当前服务提供了哪些RESTful接口方法的话，就无法从Eureka Server获取了，而传统的方法是梳理一个接口文档来供开发人员之间来进行交流。这种情况下经常会造成文档和代码的不一致性，比如说代码改了，但是接口文档还没来得及修改等问题，而Swagger2则给我们提供了一套完美的解决方案，下面来看看Swagger2是如何来解决这个问题的。

1、新建项目sc-swagger2，对应的pom.xml文件

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

<modelVersion>4.0.0</modelVersion>

 

<groupId>spring-cloud</groupId>

<artifactId>sc-swagger2</artifactId>

<version>0.0.1-SNAPSHOT</version>

<packaging>jar</packaging>

 

<name>sc-swagger2</name>

<url>http://maven.apache.org</url>

 

<parent>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-parent</artifactId>

<version>2.0.4.RELEASE</version>

</parent>

 

<dependencyManagement>

<dependencies>

<dependency>

<groupId>org.springframework.cloud</groupId>

<artifactId>spring-cloud-dependencies</artifactId>

<version>Finchley.RELEASE</version>

<type>pom</type>

<scope>import</scope>

</dependency>

 

</dependencies>

</dependencyManagement>

 

<properties>

<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

<maven.compiler.source>1.8</maven.compiler.source>

<maven.compiler.target>1.8</maven.compiler.target>

</properties>

 

<dependencies>

 

<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>

 

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-web</artifactId>

</dependency>

</dependencies>

</project>

2、新建springboot启动类

package sc.swagger2;

 

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

 

@SpringBootApplication

public class Swagger2Application {

 

public static void main(String[] args) {

SpringApplication.run(Swagger2Application.class, args);

}

 

}

3、新建Swagger2配置类

package sc.swagger2.config;

 

import org.springframework.context.annotation.Bean;

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.service.Contact;

import springfox.documentation.spi.DocumentationType;

import springfox.documentation.spring.web.plugins.Docket;

import springfox.documentation.swagger2.annotations.EnableSwagger2;

 

@Configuration

@EnableSwagger2

public class Swagger2Config {

 

@Bean

    public Docket createRestApi() {

        return new Docket(DocumentationType.SWAGGER_2)

                .apiInfo(apiInfo())

                .select()

                .apis(RequestHandlerSelectors.basePackage("sc.swagger2"))

                .paths(PathSelectors.any())

                .build();

    }

 

    private ApiInfo apiInfo() {

        return new ApiInfoBuilder()

                .title("Spring Boot中使用Swagger2构建RESTful APIs")

                .description("更多Spring Boot相关文章请关注: JAVA乐园  公众号")

                .termsOfServiceUrl("https://edu.csdn.net/lecturer/995")

                .contact(new Contact("huangjinjin", //

                 "https://edu.csdn.net/lecturer/995",//

                 ""))

                .version("1.0")

                .build();

    }

 

 

}

4、新建一个模拟的Controller

package sc.swagger2.controller;

 

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

 

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.DeleteMapping;

import org.springframework.web.bind.annotation.GetMapping;

import org.springframework.web.bind.annotation.PathVariable;

import org.springframework.web.bind.annotation.PostMapping;

import org.springframework.web.bind.annotation.PutMapping;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.ResponseBody;

 

import io.swagger.annotations.Api;

import io.swagger.annotations.ApiImplicitParam;

import io.swagger.annotations.ApiImplicitParams;

import io.swagger.annotations.ApiOperation;

import io.swagger.annotations.ApiResponse;

import io.swagger.annotations.ApiResponses;

import sc.swagger2.model.User;

 

@Api(value="用户管理")

@Controller

public class UserController {

 

@ApiResponses({ @ApiResponse(code = 000000, message = "操作成功"),

@ApiResponse(code = 000001, message = "服务器内部异常") })

@GetMapping(value = "/feign/user/getUser/{id}")

@ResponseBody

@ApiOperation(value = "获取根据Id用户信息",response = User.class)

@ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Long",example="100")

public Map<String, Object> getUser(@PathVariable Long id) {

Map<String, Object> result = new HashMap<String, Object>();

result.put("code", "000000");

result.put("msg", "success");

User u = new User();

u.setId(1L);

u.setAge(23);

u.setUserName("huangjinjin");

u.setPosition("cto");

result.put("body", u);

return result;

}

 

@ApiResponses({ @ApiResponse(code = 000000, message = "操作成功"),

@ApiResponse(code = 000001, message = "服务器内部异常") })

@RequestMapping(value = "/feign/user/listUser", method = RequestMethod.GET)

@ResponseBody

@ApiOperation(value = "获取用户列表")

public Map<String, Object> listUser() {

Map<String, Object> result = new HashMap<String, Object>();

result.put("code", "000000");

result.put("msg", "success");

User u = new User();

u.setId(1L);

u.setAge(23);

u.setUserName("huangjinjin");

u.setPosition("cto");

List<User> list = new ArrayList<User>();

list.add(u);

result.put("body", list);

return result;

}

 

@ApiResponses({ @ApiResponse(code = 000000, message = "操作成功"),

@ApiResponse(code = 000001, message = "服务器内部异常") })

@PostMapping(value = "/feign/user/addUser")

@ResponseBody

@ApiOperation(value = "添加用户", notes = "根据User对象创建用户")

@ApiImplicitParams({ @ApiImplicitParam(name = "userName", value = "用户名", required = true, dataType = "String"),

@ApiImplicitParam(name = "age", value = "年龄", required = true, dataType = "String"),

@ApiImplicitParam(name = "position", value = "职位", required = true, dataType = "String"),

@ApiImplicitParam(name = "id", value = "用户ID", required = false, dataType = "Long",example="100")})

public Map<String, Object> addUser(User user) {

Map<String, Object> result = new HashMap<String, Object>();

result.put("code", "000000");

result.put("msg", "success");

result.put("body", 1);

return result;

}

 

@ApiResponses({ @ApiResponse(code = 000000, message = "操作成功"),

@ApiResponse(code = 000001, message = "服务器内部异常") })

@ApiOperation(value = "更新用户")

@PutMapping(value = "/feign/user/updateUser")

@ResponseBody

@ApiImplicitParams({ @ApiImplicitParam(name = "userName", value = "用户名", required = true, dataType = "String"),

@ApiImplicitParam(name = "age", value = "年龄", required = true, dataType = "String"),

@ApiImplicitParam(name = "position", value = "职位", required = true, dataType = "String"),

@ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Long", example="100")})

public Map<String, Object> updateUser(User user) {

Map<String, Object> result = new HashMap<String, Object>();

result.put("code", "000000");

result.put("msg", "success");

result.put("body", 1);

return result;

}

 

@ApiResponses({ @ApiResponse(code = 000000, message = "操作成功"),

@ApiResponse(code = 000001, message = "服务器内部异常") })

@DeleteMapping(value = "/feign/user/deleteUser/{id}")

@ResponseBody

@ApiOperation(value = "删除用户")

@ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Long",example="100")

public Map<String, Object> deleteUser(@PathVariable Long id) {

Map<String, Object> result = new HashMap<String, Object>();

result.put("code", "000000");

result.put("msg", "success");

result.put("body", 1);

return result;

}

 

}

5、新建User模型类

package sc.swagger2.model;

 

import java.io.Serializable;

 

import io.swagger.annotations.ApiModel;

import io.swagger.annotations.ApiModelProperty;

 

@ApiModel

public class User implements Serializable {

 

private static final long serialVersionUID = 4639927446947303736L;

 

@ApiModelProperty(name="id", dataType="Long", value="主键ID")

private Long id;

 

@ApiModelProperty(name="userName", dataType="String", value="姓名", required=true)

private String userName;

 

@ApiModelProperty(name="age", dataType="String", value="年龄", required=true)

private Integer age;

 

@ApiModelProperty(name="position", dataType="String", value="职位")

private String position;

 

public String getUserName() {

return userName;

}

 

public void setUserName(String userName) {

this.userName = userName;

}

 

public Integer getAge() {

return age;

}

 

public void setAge(Integer age) {

this.age = age;

}

 

public String getPosition() {

return position;

}

 

public void setPosition(String position) {

this.position = position;

}

 

public Long getId() {

return id;

}

 

public void setId(Long id) {

this.id = id;

}

 

}

6、启动sc-swagger2项目，并验证是否启动成功

方式一：查看日志

16、springcloud整合Swagger2构建Restful服务的APIs