一、認識swagger

swagger是什麼，就不多說了，可以參考部落格：http://blog.csdn.net/wangnan9279/article/details/44541665。它是一款API接口的管理工具，能夠識别具有RestFul風格的接口。配置成功後，如下：

swagger，從認識swagger到配置一、認識swagger二、配置swagger

二、配置swagger

項目是基于Maven管理的SpringMVC工程：

首先，建立一個Maven工程：

swagger，從認識swagger到配置一、認識swagger二、配置swagger

填寫坐标資訊：

swagger，從認識swagger到配置一、認識swagger二、配置swagger

然後建立兩個module，分别作為web程式入口和配置swagger的子產品。

swagger，從認識swagger到配置一、認識swagger二、配置swagger

這時候，就可以删除根目錄下的src檔案夾，最後工程結構為（boot和common是兩個字子產品）：

swagger，從認識swagger到配置一、認識swagger二、配置swagger

現在父pom檔案裡已經指定了這兩個子子產品，子子產品中也指定了父pom：

swagger，從認識swagger到配置一、認識swagger二、配置swagger

既然boot是作為程式入口，是以它的打包方式為war即可。

swagger，從認識swagger到配置一、認識swagger二、配置swagger

父子pom的層級關系已經确定下來，下面就是要指定具體的依賴。因為swagger是基于restful風格的api管理工具，是以項目要是springmvc架構的。增加springmvc的依賴和對swagger的依賴：

父pom檔案：

<?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>

    <groupId>com.test.swagger</groupId>
    <artifactId>swagger-parent</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>

    <modules>
        <module>boot</module>
        <module>common</module>
    </modules>

    <dependencyManagement>
        <dependencies>
            <!--java ee-->
            <dependency>
                <groupId>javax</groupId>
                <artifactId>javaee-api</artifactId>
                <version>7.0</version>
            </dependency>
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>javax.servlet-api</artifactId>
                <version>3.1.0</version>
            </dependency>
            <!--spring-->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
                <version>4.3.6.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-orm</artifactId>
                <version>4.3.6.RELEASE</version>
            </dependency>
            <!--swagger-->
            <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger2</artifactId>
                <version>2.6.1</version>
            </dependency>
            <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger-ui</artifactId>
                <version>2.6.1</version>
            </dependency>
            <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-staticdocs</artifactId>
                <version>2.6.1</version>
            </dependency>
            <!--json-->
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-databind</artifactId>
                <version>2.8.5</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

</project>

boot子子產品的pom檔案：

<?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">
    <parent>
        <artifactId>swagger-parent</artifactId>
        <groupId>com.test.swagger</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <packaging>war</packaging>

    <artifactId>boot</artifactId>

    <dependencies>

        <!--spring-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
        </dependency>
        <!--jackson-->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
        </dependency>
        <!--swagger-->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
        </dependency>
        <!--java ee-->
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <scope>provided</scope>
        </dependency>
        <!--common-->
        <dependency>
            <groupId>${project.parent.groupId}</groupId>
            <artifactId>common</artifactId>
            <version>${project.parent.version}</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-staticdocs</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

</project>

common子子產品的pom檔案：

<?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">
    <parent>
        <artifactId>swagger-parent</artifactId>
        <groupId>com.test.swagger</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>common</artifactId>

    <dependencies>
        <!--spring-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <optional>true</optional>
        </dependency>
        <!--swagger-->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-staticdocs</artifactId>
            <version>2.6.1</version>
            <optional>true</optional>
        </dependency>
        <!--jackson-->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <optional>true</optional>
        </dependency>
        <!--java ee-->
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <optional>true</optional>
        </dependency>

    </dependencies>

</project>

boot作為web程式入口，其WEB_INF/web.xml檔案定義如下：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
         http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         version="3.0">

    <!--Encoding Filter-->
    <filter>
        <filter-name>encodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!--Spring MVC-->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:context-mvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

</web-app>

其中，web.xml檔案指定了springMvc的配置檔案為：類路徑下的context-mvc.xml。 context-mvc.xml配置為：

<?xml version="1.0" encoding="UTF-8"?>
<!--suppress UnparsedCustomBeanInspection -->
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!--配置-->
    <mvc:annotation-driven/>

    <!--元件-->
    <bean class="com.swagger.test.common.RedirectCtr"/>
    <context:component-scan base-package="com.swagger.test.controller"/>

    <!--功能-->
    <import resource="classpath:context/context-swagger.xml"/>

</beans>

其中第一條是指開啟注解功能，第二條注冊了一個bean執行個體，用來指定容器初始化後重定向的頁面資訊；第三條聲明了一個類路徑下的掃描器；第四條用于引入swagger的配置檔案context-swagger.xml。

RedirectCtr類如下：

package com.swagger.test.common;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author tian.lue
 */
@Controller
public class RedirectCtr {

    @RequestMapping("/")
    String redirect() {
        return "redirect:/about.html";
    }

}

它指定了重定向的路徑為about.html

context-swagger.xml檔案如下：

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <bean id="swaggerConfig" class="com.swagger.test.common.SwaggerConfig"/>
    <mvc:resources mapping="swagger-ui.html" location="classpath:/META-INF/resources/"/>
    <mvc:resources mapping="/webjars/**" location="classpath:/META-INF/resources/webjars/"/>
    <mvc:resources mapping="/**" location="/static/"/>

</beans>

首先，它注冊了一個bean，用于配置swagger的基本資訊，然後指定了swagger的頁面（後面幾個不能随意改變）。 SwaggerConfig配置類如下：

package com.swagger.test.common;

import com.google.common.base.Predicate;
import org.springframework.context.annotation.Bean;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

import static com.google.common.base.Predicates.or;
import static springfox.documentation.builders.PathSelectors.regex;

/**
 * @author tian.luye
 */
@EnableSwagger2
public class SwaggerConfig {

    @Bean
    public Docket selfCareApi() {
        return new Docket(DocumentationType.SWAGGER_2)
            .groupName("swagger")
            .apiInfo(selfCareApiInfo())
            .select()
            .paths(selfCareApiPaths())
            .build();
    }

    private ApiInfo selfCareApiInfo() {
        return new ApiInfoBuilder()
            .title("Test Swagger API")
            .version("1.0-SNAPSHOT")
            .build();
    }

    private Predicate<String> selfCareApiPaths() {
        //noinspection unchecked
        return or(
            regex("/test.*")
        );
    }

}

這個配置類描述的非常清楚，隻配置了兩處資訊：一是Swagger的基本描述資訊，二是Swagger的攔截路徑，即加在類上的RequestMapping的path值。

最後，我們需要編寫Controller接口代碼

package com.swagger.test.controller;

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

/**
 * @author tian.lue
 */
@RestController
@RequestMapping(path = "/test")
public class TestSwagger {

    @RequestMapping(path = "/one", method = RequestMethod.POST)
    public Object test() {
        return null;
    }

    @RequestMapping(path = "/getRedis", method = RequestMethod.POST)
    public String getRedis() {
        return "asdasd";
    }

}

運作後可以通過about.html中的超連結通路到配置好的Swagger頁面中：

swagger，從認識swagger到配置一、認識swagger二、配置swagger

swagger，從認識swagger到配置一、認識swagger二、配置swagger

一、認識swagger

二、配置swagger

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