公众号： java乐园
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;@SpringBootApplicationpublic 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@EnableSwagger2public 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",// "happyhuangjinjin@sina.com")) .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")@Controllerpublic 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;@ApiModelpublic 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
方式二：访问地址
http://127.0.0.1:9092/swagger-ui.html
或者访问http://localhost:9092/v2/api-docs
7、在界面http://127.0.0.1:9092/swagger-ui.html点击【user-controller】可以看到所有的接口，同时也可以在界面上进行接口调用调试