# SpringBoot2 整合 Swagger2
**SpringBoot整合三板斧**
### 第一步、引入pom
```pom
```
**`swagger-spring-boot-starter`该项目主要利用Spring Boot的自动化配置特性来实现快速的将swagger2引入spring boot应用来生成API文档，简化原生使用swagger2的整合代码。**
**`swagger-bootstrap-ui`是`springfox-swagger`的增强UI实现，为Java开发者在使用Swagger的时候，能拥有一份简洁、强大的接口文档体验**
**`swagger-annotations`,`swagger-models`是因为`springfox-swagger2`包里有`swagger-models-1.5.20.jar`报错。所以替换成1.5.22版本**
```java
java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Long.parseLong(Long.java:601)
at java.lang.Long.valueOf(Long.java:803)
at io.swagger.models.parameters.AbstractSerializableParameter.getExample(AbstractSerializableParameter.java:412)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at......
```
**看下1.5.20版本里AbstractSerializableParameter.java源码：**
```java
public Object getExample() {
if (this.example == null) {
return null;
} else {
try {
if ("integer".equals(this.type)) {
return Long.valueOf(this.example);
}
if ("number".equals(this.type)) {
return Double.valueOf(this.example);
}
if ("boolean".equals(this.type) && ("true".equalsIgnoreCase(this.example) || "false".equalsIgnoreCase(this.defaultValue))) {
return Boolean.valueOf(this.example);
}
} catch (NumberFormatException var2) {
LOGGER.warn(String.format("Illegal DefaultValue %s for parameter type %s", this.defaultValue, this.type), var2);
}
return this.example;
}
}
```
**这里只判断了this.example == null才返回null，其余会去进行转换，而空字符串也会进行转换，导致格式抛出格式化转换异常.再来看下1.5.22版本里AbstractSerializableParameter.java源码：**
```java
public Object getExample() {
if (this.example != null && !this.example.isEmpty()) {
try {
if ("integer".equals(this.type)) {
return Long.valueOf(this.example);
}
if ("number".equals(this.type)) {
return Double.valueOf(this.example);
}
if ("boolean".equals(this.type) && ("true".equalsIgnoreCase(this.example) || "false".equalsIgnoreCase(this.defaultValue))) {
return Boolean.valueOf(this.example);
}
} catch (NumberFormatException var2) {
LOGGER.warn(String.format("Illegal DefaultValue %s for parameter type %s", this.defaultValue, this.type), var2);
}
return this.example;
} else {
return this.example;
}
}
```
**对example同时进行了null和空值的判断，官方也发现了自己的这个问题，我们进行相应的替换即可**
### 第二部、配置
**`swagger-spring-boot-starter`相关配置信息可参考如下地址:**
- 源码地址
- GitHub：https://github.comhttps://img.qb5200.com/download-x/dyc87112/spring-boot-starter-swagger
- 码云：https://gitee.comhttps://img.qb5200.com/download-x/didispace/spring-boot-starter-swagger
- 使用样例：https://github.comhttps://img.qb5200.com/download-x/dyc87112/swagger-starter-demo
- 博客：[http://blog.didispace.com](http://blog.didispace.com/)
- 社区：[http://www.spring4all.com](http://www.spring4all.com/)
**`swagger-bootstrap-ui`相关配置信息可参考如下地址:**
官方地址：https:/https://img.qb5200.com/download-x/doc.xiaominfo.com/guide/
> `swagger-bootstrap-ui`目前已改名了`knife4j-spring-boot-starter`
>
> 项目正式更名为**knife4j**,取名knife4j是希望她能像一把匕首一样小巧,轻量,并且功能强悍,更名也是希望把她做成一个为Swagger接口文档服务的通用性解决方案,不仅仅只是专注于前端Ui前端.
>
> swagger-bootstrap-ui的所有特性都会集中在`knife4j-spring-ui`包中,并且后续也会满足开发者更多的个性化需求.
```yaml
swagger:
version: 1.0v # 版本号
authorization: # 全局参数
name: Authorization # 鉴权策略ID，对应 SecurityReferences ID
type: ApiKey # 鉴权策略，可选 ApiKey | BasicAuth | None，默认ApiKey
key-name: X-Token # 鉴权传递的Header参数
# auth-regex: ^.*$ # 需要开启鉴权URL的正则, 默认^.*$匹配所有URL
ui-config: # 排序规则
operations-sorter: method # 按方法定义顺序排序
tags-sorter: alpha # 按字母表排序
docket: # 分组配置
common:
base-package: com.xxxx.a
description: API接口文档
title: xxx接口
contact:
name: xxx
url: https://cn.bing.com/
hq:
base-package: com.xxxx.b
description: API接口文档
title: xxx接口
contact:
name: xxx
url: https://zc.happyloves.cn:4443/wordpress/
shop:
base-package: com.xxxx.c
description: API接口文档
title: xxx接口
contact:
name: xxx
url: https://zc.happyloves.cn
```
### 第三步、注解
```java
@EnableSwagger2Doc // 启用Swagger2
@EnableSwaggerBootstrapUI //启用swagger-bootstrap-ui
@SpringBootApplication
public class WebApplication {
public static void main(String[] args) {
SpringApplication.run(WebApplication.class, args);
}
}
```
**编写代码**
```java
@Api(value = "DemoOne-DemoOne服务~~~~~~~~", tags = {"1-DemoOne-DemoOne服务"})
@Slf4j
@Validated
@RestController
@RequestMapping("/common/DemoOne")
public class DemoOneController {
private final DemoOneService service;
@Autowired
public DemoOneController(DemoOneService service) {
this.service = service;
}
//=====================================================================================DELETE=====================================================================================
@ApiOperation(value = "根据主键ID删除", notes = "根据主键ID删除~~~~~~~~~~~~~")
@DeleteMapping("/{id}")
public ApiMessage deleteById(@PathVariable @Min(1) int id) throws Exception {
return service.deleteById(id);
}
//=====================================================================================GET========================================================================================
@ApiOperation(value = "获取所有数据", notes = "获取所有数据~~~~~~~~~~~~~")
@GetMapping("/")
public ApiMessage
