SpringBoot 集成 Swagger
- 前言
- pom.xml 配置文件
- application.yml 配置文件
- config 包
- Swagger2Config
 
- entity 包
- UserEntity
 
- service 包
- impl 包
- SwaggerServiceImpl
 
- SwaggerService
 
- controller 包
- SwaggerController
 
- SwaggerApplication
- 验证
前言
创建项目步骤、及版本选择等,在《SpringBoot【1】集成 Druid》章节中有详细介绍,此处不再重复概述。
当前先说明下,为什么需要集成 Swagger ??
- 如下一个控制层(Controller)代码:
 
若不集成 Swagger,则 在页面进行测试时,将是如下这样:
 
 每次调用测试,都需要在浏览器访问。
 测试多个方法时、甚是繁琐。
 于是乎, 你就开始了“奇思幻想”:有没有一种办法可以不这么繁琐,而又能测试?
- 答案呢,肯定是有的。比如呢? 集成 junit 写单元测试、或者浏览器安装插件等等。此处:我们集成Swagger来解决此问题,注意 此处的版本是Swagger2(第2代)
集成之后,在进行测试,是长这样子的:
 
SpringBoot 集成 Swagger2 完成之后,项目截图如下 :

pom.xml 配置文件
<?xml version="1.0" encoding="UTF-8"?>
<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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.12.RELEASE</version>
        <relativePath />
    </parent>
    <groupId>com.junjiu.springboot.swagger</groupId>
    <artifactId>junjiu-springboot-swagger</artifactId>
    <version>1.0-SNAPSHOT</version>
    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--
            以下 3个依赖是集成 Swagger2 所需
        -->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>3.0.0</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>3.0.0</version>
        </dependency>
        <dependency>
            <groupId>com.github.xiaoymin</groupId>
            <artifactId>knife4j-spring-boot-starter</artifactId>
            <version>3.0.3</version>
        </dependency>
        <!--
            UserEntity 中为了使用 @data 注解,当前添加 lombok
        -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
    </dependencies>
</project>
application.yml 配置文件
server:
  port: 5826
spring:
  application:
    name: Junjiu-Springboot-Swagger
    version: 1.0.0
config 包
Swagger2Config
package com.junjiu.springboot.swagger.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;
/**
 * program: junjiu-springboot-swagger
 * ClassName: Swagger2Config
 * description:
 *
 * @author: 九尊
 * @create: 2024-06-20 23:00
 * @version: 1.0
 **/
@EnableSwagger2
@Configuration
public class Swagger2Config {
    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .select()
                .apis(RequestHandlerSelectors.basePackage("com.junjiu.springboot.swagger"))
                .paths(PathSelectors.any())
                .build();
    }
    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("Swagger2")
                .description("SpringBoot 集成 Swagger2")
                .contact(new Contact("君九", "https://blog.csdn.net/charlesyuangc", "123456@email.com"))
                .termsOfServiceUrl("https://blog.csdn.net/charlesyuangc")
                .version("version 1.0")
                .build();
    }
}
entity 包
UserEntity
package com.junjiu.springboot.swagger.entity;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;
/**
 * program: junjiu-springboot-swagger
 * ClassName: UserEntity
 * description: 实体类. 对接 数据库中的表,例如:tb_user,
 *              此处为了演示 Swagger2 在实体类中的注解使用,暂不再创建表了。
 *
 * @author: 九尊
 * @create: 2024-06-20 23:07
 * @version: 1.0
 **/
@Data
@ApiModel(value = "用户实体类", description = "用户实体类")
public class UserEntity {
    /**
     * 以下 3种 写法均可以的。
     */
    // @ApiModelProperty(value = "用户ID", name = "id", required = true)
    // @ApiModelProperty(value = "用户ID", name = "id")
    @ApiModelProperty(value = "用户ID")
    private Long id;
    @ApiModelProperty(value = "用户名", name = "userName")
    private String userName;
    @ApiModelProperty(value = "昵称", name = "nickName", required = true)
    private String nickName;
}
service 包
impl 包
SwaggerServiceImpl
package com.junjiu.springboot.swagger.service.impl;
import com.junjiu.springboot.swagger.entity.UserEntity;
import com.junjiu.springboot.swagger.service.SwaggerService;
import org.springframework.stereotype.Service;
/**
 * program: junjiu-springboot-swagger
 * ClassName: SwaggerServiceImpl
 * description:
 *
 * @author: 九尊
 * @create: 2024-06-20 22:47
 * @version: 1.0
 **/
@Service
public class SwaggerServiceImpl implements SwaggerService {
    @Override
    public String setAdd(Integer numA, Integer numB) {
        Integer total = numA + numB;
        return "运行结果是:" + String.valueOf(total);
    }
    @Override
    public UserEntity getUser(Long id) {
        System.out.println("id:" + id);
        // 从数据库中查询到数据后,返回对象。
        UserEntity userEntity = new UserEntity();
        userEntity.setId(id);
        userEntity.setUserName("君九");
        userEntity.setNickName("九皇叔叔");
        return userEntity;
    }
    @Override
    public String setUpdate(UserEntity userEntity) {
        return "用户信息更新成功.";
    }
}
SwaggerService
package com.junjiu.springboot.swagger.service;
import com.junjiu.springboot.swagger.entity.UserEntity;
/**
 * program: junjiu-springboot-swagger
 * ClassName: SwaggerService
 * description:
 *
 * @author: 九尊
 * @create: 2024-06-20 22:46
 * @version: 1.0
 **/
public interface SwaggerService {
    /**
     * 测试接口 | 加法运算.
     * @param numA
     * @param numB
     * @return
     */
    String setAdd(Integer numA, Integer numB);
    /**
     * 根据用户ID编号查询用户信息.
     * @param id
     * @return
     */
    UserEntity getUser(Long id);
    /**
     * 更新用户信息.
     * @param userEntity
     * @return
     */
    String setUpdate(UserEntity userEntity);
}
controller 包
SwaggerController
package com.junjiu.springboot.swagger.controller;
import com.junjiu.springboot.swagger.entity.UserEntity;
import com.junjiu.springboot.swagger.service.SwaggerService;
import io.swagger.annotations.Api;
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.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RestController;
/**
 * program: junjiu-springboot-swagger
 * ClassName: SwaggerController
 * description:
 *
 * @author: 九尊
 * @create: 2024-06-20 22:46
 * @version: 1.0
 **/
@Api(value = "Swagger 示例", tags = "Swagger 示例 Api")
@RestController
public class SwaggerController {
    @Autowired
    private SwaggerService swaggerService;
    /**
     * 测试方法 | 加法运算,需要注意此处有 2个参数
     * @param numA
     * @param numB
     * @return
     */
    @ApiOperation("加法运算方法.")
    @ApiImplicitParams({
            @ApiImplicitParam(name = "numA", value = "第一个参数", required = true, dataType = "Integer", paramType = "path", example = "10"),
            @ApiImplicitParam(name = "numB", value = "第二个参数", required = true, dataType = "Integer", paramType = "path", example = "20")
    })
    @GetMapping("/setAdd/{numA}/{numB}")
    public String setAdd(
            @PathVariable("numA") Integer numA,
            @PathVariable("numB") Integer numB
    ) {
        return swaggerService.setAdd(numA, numB);
    }
    /**
     * 测试方法 | 根据 id编号 查询用户信息,注意:这里只有 1个参数.
     * @param id
     * @return
     */
    @ApiOperation("获取用户信息")
    @ApiImplicitParam(name = "id", value = "用户id", required = true, dataType = "Long", paramType = "path", example = "1")
    @GetMapping("/getUser/{id}")
    public UserEntity getUser(@PathVariable("id") Long id){
        return swaggerService.getUser(id);
    }
    /**
     * 更新用户信息 .
     * @param userEntity
     * @return
     */
    @ApiOperation("更新用户信息")
    @ApiImplicitParam(name = "userEntity", value = "用户实体类", required = true, dataType = "UserEntity", paramType = "body")
    @PutMapping("/setUpdate")
    public String setUpdate(UserEntity userEntity) {
        return swaggerService.setUpdate(userEntity);
    }
}
SwaggerApplication
package com.junjiu.springboot.swagger;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/**
 * program: junjiu-springboot-swagger
 * ClassName: SwaggerApplication
 * description:
 *
 * @author: 九尊
 * @create: 2024-06-20 22:45
 * @version: 1.0
 **/
@SpringBootApplication
public class SwaggerApplication {
    public static void main(String[] args) {
        SpringApplication.run(SwaggerApplication.class, args);
    }
}
验证
启动之后,
 
在浏览器地址栏访问:
 http://localhost:5826/doc.html
 
示例说明
 以 获取用户信息 API 为例:
 
 



















