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  • SpringMVC、SpringFox和Swagger整合项目实例

    目标

    在做项目的时候,有时候需要提供其它平台(如业务平台)相关的HTTP接口,业务平台则通过开放的HTTP接口获取相关的内容,并完成自身业务~

    提供对外开放HTTP API接口,比较常用的是采用Spring MVC来完成。

    本文的目标是先搭建一个简单的Spring MVC应用,然后为Spring MVC整合SpringFox-Swagger以及SpringFox-Swagger-UI,最终,达到Spring MVC对外开放接口API文档化。

    如下图所示:

    搭建SpringMVC工程

    新建Maven工程

    Eclipse中,File --> New --> Maven Project, 

    点击“Next”按钮, 然后选择 “maven-archetype-webapp”,

    继续点击“Next”按钮,然后指定

    点击“Finish” 按钮结束~ 就这样,一个简单的Web工程就建好了~

    但是,

    默认是使用J2SE-1.5, 配置一下Build Path,使用本地机器上安装的JDK

    (本文中使用的是JDK 1.7),工程默认字体是GBK,将其改成UTF-8

    完成后,Maven工程的结构如下图所示:

    引入Spring依赖包

    在本示例中,因为简单,所以只要引入如下几个jar包就好了~

    <dependencies>
            <!--引入Spring依赖包 -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-core</artifactId>
                <version>${spring.framework.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>${spring.framework.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
                <version>${spring.framework.version}</version>
            </dependency>
        </dependencies>

    完整的pom.xml文件内容如下:

    <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/maven-v4_0_0.xsd">
        <modelVersion>4.0.0</modelVersion>
        <groupId>com.xxx.tutorial</groupId>
        <artifactId>springfox-swagger-demo</artifactId>
        <packaging>war</packaging>
        <version>0.0.1-SNAPSHOT</version>
        <name>springfox-swagger-demo Maven Webapp</name>
        <url>http://maven.apache.org</url>
    
        <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <spring.framework.version>4.3.6.RELEASE</spring.framework.version>
        </properties>
    
        <dependencies>
            <!--引入Spring依赖包 -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-core</artifactId>
                <version>${spring.framework.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>${spring.framework.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
                <version>${spring.framework.version}</version>
            </dependency>
        </dependencies>
        
        <build>
            <finalName>springfox-swagger-demo</finalName>
        </build>
    </project>

    编写spring-mvc.xml文件

    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
        xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:p="http://www.springframework.org/schema/p"
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
            http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
    
        <!-- 默认的注解映射的支持 ,它会自动注册DefaultAnnotationHandlerMapping 与AnnotationMethodHandlerAdapter -->
        <mvc:annotation-driven />
    
        <!-- 设置使用注解的类所在的jar包 -->
        <context:component-scan base-package="com.htjf.controller" />  <!--这个是我的项目包结构-->
        
    </beans>

    配置applicationContext.xml

    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
        xmlns:p="http://www.springframework.org/schema/p"
        xmlns:context="http://www.springframework.org/schema/context"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context-4.3.xsd">
            
            <!-- 启用注解扫描,并定义组件查找规则 ,除了@controller,扫描所有的Bean -->
            <context:component-scan base-package="com.htjf"/>
            
             <!-- 启动SpringMVC的注解功能,完成请求和注解POJO的映射 -->
            <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />
    
            <!-- enable autowire 向容器自动注册 -->
            <context:annotation-config />           
    </beans>
     

    配置web.xml

    <?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
             version="3.1">
      <display-name>Archetype Created Web Application</display-name>
    
        <!-- 利用Spring提供的ContextLoaderListener监听器去监听ServletContext对象的创建,并初始化WebApplicationContext对象 -->
        <listener>
            <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
        </listener>
        <!-- Context Configuration locations for Spring XML files(默认查找/WEB-INF/applicationContext.xml) -->
        <context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:applicationContext.xml</param-value>
        </context-param>
     
    <!-- 配置Spring MVC的前端控制器:DispatchcerServlet -->
      <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:spring-mvc.xml</param-value>
        </init-param>
    
        <load-on-startup>1</load-on-startup>
        <async-supported>true</async-supported>
      </servlet>
    
      <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
      </servlet-mapping>
    
      <!--字符编码过滤器-->
      <filter>
        <filter-name>encoding</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>
        <init-param>
          <param-name>forceEncoding</param-name>
          <param-value>true</param-value>
        </init-param>
      </filter>
    
      <filter-mapping>
        <filter-name>encoding</filter-name>
        <url-pattern>/*</url-pattern>
      </filter-mapping>
    
    </web-app>

    编写Controller并测试

    配置好spring-mvc.xml、applicationContext.xml以及web.xml文件之后,咱们继续往下走~

    因为,本文Spring MVC示例的作用主要用来暴露对外HTTP API接口,先写一个简单的ProductController,其包含一个按照id查询的方法。

    Product.java和ProductController.java的内容如下:

    Product.java

    package com.xxx.tutorial.model;
    
    import java.io.Serializable;
    
    /**
     * 
     * @author wangmengjun
     *
     */
    public class Product implements Serializable {
    
        private static final long serialVersionUID = 1L;
    
        /**ID*/
        private Long id;
    
        /**产品名称*/
        private String name;
    
        /**产品型号*/
        private String productClass;
    
        /**产品ID*/
        private String productId;
    
        /**
         * @return the id
         */
        public Long getId() {
            return id;
        }
    
        /**
         * @param id
         *            the id to set
         */
        public void setId(Long id) {
            this.id = id;
        }
    
        /**
         * @return the name
         */
        public String getName() {
            return name;
        }
    
        /**
         * @param name
         *            the name to set
         */
        public void setName(String name) {
            this.name = name;
        }
    
        /**
         * @return the productClass
         */
        public String getProductClass() {
            return productClass;
        }
    
        /**
         * @param productClass
         *            the productClass to set
         */
        public void setProductClass(String productClass) {
            this.productClass = productClass;
        }
    
        /**
         * @return the productId
         */
        public String getProductId() {
            return productId;
        }
    
        /**
         * @param productId
         *            the productId to set
         */
        public void setProductId(String productId) {
            this.productId = productId;
        }
    
        /*
         * (non-Javadoc)
         * 
         * @see java.lang.Object#toString()
         */
        @Override
        public String toString() {
            return "Product [id=" + id + ", name=" + name + ", productClass=" + productClass + ", productId=" + productId
                    + "]";
        }
    
    }

    ProductController.java

    package com.xxx.tutorial.controller;
    
    import org.springframework.http.ResponseEntity;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    import org.springframework.web.bind.annotation.RestController;
    
    import com.xxx.tutorial.model.Product;
    
    @RestController
    @RequestMapping(value = { "/api/product/"})
    public class ProductController {
    
        @RequestMapping(value = "/{id}", method = RequestMethod.GET)
        public ResponseEntity<Product> get(@PathVariable Long id) {
            Product product = new Product();
            product.setName("七级滤芯净水器");
            product.setId(1L);
            product.setProductClass("seven_filters");
            product.setProductId("T12345");
            return ResponseEntity.ok(product);
        }
    }

    注:

    鉴于是一个demo示例,所以没有写ProductService以及相关DAO, 直接在方法中返回固定的Product信息~

    验证Spring MVC是否ok

    完成Controller的代码,运行Spring MVC项目,然后,看一下Spring MVC是否运行ok,访问URL地址

    http://localhost:8888/springfox-swagger-demo/api/product/1

    • 出现错误

    详细的错误信息如下:

    五月 23, 2017 3:00:55 下午 org.apache.catalina.core.StandardWrapperValve invoke
    严重: Servlet.service() for servlet [spring-mvc] in context with path [/springfox-swagger-demo] threw exception [Request processing failed; nested exception is java.lang.IllegalArgumentException: No converter found for return value of type: class com.xxx.tutorial.model.Product] with root cause
    java.lang.IllegalArgumentException: No converter found for return value of type: class com.xxx.tutorial.model.Product
    	at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:187)
    	at org.springframework.web.servlet.mvc.method.annotation.HttpEntityMethodProcessor.handleReturnValue(HttpEntityMethodProcessor.java:203)
    	at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:81)
    	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:132)
    	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
    	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
    	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
    	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
    	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
    	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
    	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:624)
    	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
    	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
    	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
    	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:957)
    	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
    	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
    	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620)
    	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
    	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    	at java.lang.Thread.run(Unknown Source)
    
    

    解决方法,添加jackson-databind依赖包即可~

    <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-databind</artifactId>
                <version>2.6.6</version>
            </dependency>
     

    重新启动,运行一下,成功返回信息~

    为了看的更加清楚,可以使用postman来完成~, 如~

    至此,一个简单的基于SpringMVC的Web项目已经创建,并能对外提供API接口~ 

    接下来,我们要整合SpringFox和SwaggerUI到该SpringMVC项目中去,使其对外接口文档化

    整合SpringFox-Swagger

    SpringFox【SpringFox链接】已经可以代替Swagger-SpringMVC, 目前SpringFox同时支持Swagger 1.2 和 2.0.

    在SpringMVC项目中整合SpringFox-Swagger只要如下几步即可~

    • 添加SpringFox-Swagger依赖
    • 添加SwaggerConfig

    添加依赖

    <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger2</artifactId>
                <version>2.7.0</version>
            </dependency>

    添加SwaggerConfig

    package com.htjf.config;
    
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.ComponentScan;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.servlet.config.annotation.EnableWebMvc;
    
    import springfox.documentation.builders.ApiInfoBuilder;
    import springfox.documentation.builders.RequestHandlerSelectors;
    import springfox.documentation.service.ApiInfo;
    import springfox.documentation.spi.DocumentationType;
    import springfox.documentation.spring.web.plugins.Docket;
    import springfox.documentation.swagger2.annotations.EnableSwagger2;
    
    @Configuration
    @EnableSwagger2
    @ComponentScan(basePackages= {"com.htjf.controller"})
    @EnableWebMvc
    public class SwaggerConfig {
    
        @Bean
        public Docket api() {
            return new Docket(DocumentationType.SWAGGER_2)
                    .select()
                    .apis(RequestHandlerSelectors.any())
                    .build()
                    .apiInfo(apiInfo());
        }
        
        private ApiInfo apiInfo() {
            return new ApiInfoBuilder()
                    .title("对外开放接口API 文档")               //大标题 title
                    .description("HTTP对外开放接口")             //小标题
                    .version("1.0.0")                           //版本
                    .termsOfServiceUrl("http://xxx.xxx.com")    //终端服务程序
                    .license("LICENSE")                         //链接显示文字
                    .licenseUrl("http://xxx.xxx.com")           //网站链接
                    .build();
        }
    }

    整合SpringFox-Swagger-UI

    在SpringMVC项目中整合SpringFox-Swagger-UI也只要如下两个步骤即可~

    • 添加SpringFox-Swagger-UI依赖
    • 添加配置

    添加依赖

    <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger-ui</artifactId>
                <version>2.7.0</version>
            </dependency>
     

    添加配置

    在添加配置之前,一起来看一下swagger-ui中使用的静态资源文件(如 swagger-ui.html )放在那里~

    spingfox-swagger-ui-2.7.0.jar中的/META-INF/resources/下~ 如下图所示:

    为了访问swagger-ui.html,我们配置对这些静态资源的访问~ 如:

    package com.xxx.tutorial.config;
    
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.servlet.config.annotation.EnableWebMvc;
    import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
    import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
    
    @Configuration
    @EnableWebMvc
    public class WebAppConfig extends WebMvcConfigurerAdapter {
    
        @Override 
        public void addResourceHandlers(ResourceHandlerRegistry registry) {
            registry.addResourceHandler("swagger-ui.html").addResourceLocations("classpath:/META-INF/resources/");
            registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
        }
    
    }

    该配置代码的效果和如下代码等价~

    <mvc:resources mapping="swagger-ui.html" location="classpath:/META-INF/resources/" />
        <mvc:resources mapping="/webjars/**"
            location="classpath:/META-INF/resources/webjars/" />
     

    在本文中,可以将其配置在spring-mvc.xml中,

    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
        xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:p="http://www.springframework.org/schema/p"
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
            http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
    
        <!-- 默认的注解映射的支持 ,它会自动注册DefaultAnnotationHandlerMapping 与AnnotationMethodHandlerAdapter -->
        <mvc:annotation-driven />
    
        <!-- 设置使用注解的类所在的jar包 -->
        <context:component-scan base-package="com.htjf.controller" />
        
        <mvc:resources location="classpath:/META-INF/resources/" mapping="swagger-ui.html"/>
        <mvc:resources location="classpath:/META-INF/resources/webjars/" mapping="/webjars/**"/>
    </beans>
     

    API接口说明代码添加并测试

    经过上述几个步骤之后,之前写的ProductController的接口,就可以实现文档化了,如本文通过如下的访问地址访问:

    http://localhost:8888/springfox-swagger-demo/swagger-ui.html

    这个接口API雏形出来了,但是还缺少点东西,比如:接口方法的描述等都没有~

    修改一下,ProductController.java内容,如:

    package com.xxx.tutorial.controller;
    
    import org.springframework.http.ResponseEntity;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    import org.springframework.web.bind.annotation.RestController;
    
    import com.xxx.tutorial.model.Product;
    
    import io.swagger.annotations.Api;
    import io.swagger.annotations.ApiOperation;
    
    @RestController
    @RequestMapping(value = { "/api/product/" })
    @Api(value = "/product", tags = "Product接口")
    public class ProductController {
    
        @RequestMapping(value = "/{id}", method = RequestMethod.GET)
        @ApiOperation(value = "根据id获取产品信息", notes = "根据id获取产品信息", httpMethod = "GET", response = Product.class)
        public ResponseEntity<Product> get(@PathVariable Long id) {
            Product product = new Product();
            product.setName("七级滤芯净水器");
            product.setId(1L);
            product.setProductClass("seven_filters");
            product.setProductId("T12345");
            return ResponseEntity.ok(product);
        }
    }

    重新访问,接口已经出现多个我们指定的描述信息~

     

    在参数id栏中输入1,然后点击“try it out”按钮~ 可以查看接口调用结果~

    至此一个简单的示例就完成了~

    稍微增加几个接口

    修改ProductController

    package com.xxx.tutorial.controller;
    
        import java.util.Arrays;
        import java.util.List;
    
        import org.springframework.http.ResponseEntity;
        import org.springframework.web.bind.annotation.PathVariable;
        import org.springframework.web.bind.annotation.RequestMapping;
        import org.springframework.web.bind.annotation.RequestMethod;
        import org.springframework.web.bind.annotation.RestController;
    
        import com.xxx.tutorial.model.Product;
    
        import io.swagger.annotations.Api;
        import io.swagger.annotations.ApiOperation;
        import io.swagger.annotations.ApiResponse;
        import io.swagger.annotations.ApiResponses;
    
        @RestController
        @RequestMapping(value = { "/api/product/" })
        @Api(value = "/product", tags = "Product接口")
        public class ProductController {
    
            @RequestMapping(value = "/{id}", method = RequestMethod.GET)
            @ApiResponses(value= {
                    @ApiResponse(code = 400,message="参数错误"),
                    @ApiResponse(code = 401,message="要求用户的身份认证"),
                    @ApiResponse(code = 403,message="拒绝执行此请求"),
                    @ApiResponse(code = 404,message="系统资源未发现"),
                    @ApiResponse(code = 500,message="系统错误"),
                    @ApiResponse(code = 200,message="成功,其它为错误,返回格式:{code:0,data[{}]},data中的属性参照下方Model",response=Product.class)})
            @ApiOperation(value = "根据id获取产品信息", notes = "根据id获取产品信息", httpMethod = "GET")
            public ResponseEntity<Product> get(@PathVariable Long id) {
                Product product = new Product();
                product.setName("七级滤芯净水器");
                product.setId(1L);
                product.setProductClass("seven_filters");
                product.setProductId("T12345");
                return ResponseEntity.ok(product);
            }
    
            @RequestMapping(method = RequestMethod.POST)
            @ApiOperation(value = "添加一个新的产品")
            @ApiResponses(value = { 
                    @ApiResponse(code = 201,message="已创建。成功请求并创建了新的资源"),
                    @ApiResponse(code = 401,message="要求用户的身份认证"),
                    @ApiResponse(code = 403,message="拒绝执行此请求"),
                    @ApiResponse(code = 404,message="系统资源未发现"),
                    @ApiResponse(code = 405, message = "参数错误"), 
                    @ApiResponse(code = 200,message="成功,其它为错误,返回格式:{code:0,data[{}]},data中的属性参照下方Model",response=String.class)})
            public ResponseEntity<String> add(Product product) {
                return ResponseEntity.ok("SUCCESS");
            }
    
            @RequestMapping(method = RequestMethod.PUT)
            @ApiOperation(value = "更新一个产品")
            @ApiResponses(value = { 
                    @ApiResponse(code = 200,message="成功,其它为错误,返回格式:{code:0,data[{}]},data中的属性参照下方Model",response=String.class),
                    @ApiResponse(code = 201,message="已创建。成功请求并创建了新的资源"),
                    @ApiResponse(code = 400, message = "参数错误"),
                    @ApiResponse(code = 401,message="要求用户的身份认证"),
                    @ApiResponse(code = 403,message="拒绝执行此请求"),
                    @ApiResponse(code = 404,message="系统资源未发现")})
            public ResponseEntity<String> update(Product product) {
                return ResponseEntity.ok("SUCCESS");
            }
    
            @RequestMapping(method = RequestMethod.GET)
            @ApiOperation(value = "获取所有产品信息", notes = "获取所有产品信息", httpMethod = "GET", response = Product.class, responseContainer = "List")
            public ResponseEntity<List<Product>> getAllProducts() {
                Product product = new Product();
                product.setName("七级滤芯净水器");
                product.setId(1L);
                product.setProductClass("seven_filters");
                product.setProductId("T12345");
                return ResponseEntity.ok(Arrays.asList(product, product));
            }
        }
    
        @RequestMapping(method=RequestMethod.DELETE)
        @ApiOperation(value="删除某个产品信息",notes="删除某个产品信息")
    /*    @ApiImplicitParams(@ApiImplicitParam(name="carOwnerName",value="产品id",dataType="Long"))*/
        @ApiResponses(value= {
                @ApiResponse(code = 204,message="无内容。服务器成功处理,但未返回内容!"),
                @ApiResponse(code = 400,message="参数错误"),
                @ApiResponse(code = 401,message="要求用户的身份认证"),
                @ApiResponse(code = 403,message="拒绝执行此请求"),
                @ApiResponse(code = 500,message="系统错误"),
                @ApiResponse(code = 200,message="成功,其它为错误,返回格式:{code:0,data[{}]},data中的属性参照下方Model",response=String.class)})
        public ResponseEntity<String> delete(@PathVariable Long id){
            if(carOwnerName==null) {
                return new ResponseEntity<String>(HttpStatus.NO_CONTENT);
            }else {
                return ResponseEntity.ok("SUCCESS");
            }
    }
     

    swagger-ui展示

    由上图可以看出,不同的method(GET / PUT / POST等)都会以不同的颜色展示出来~

    Swagger-ui的添加,可以帮助他人查看接口信息,并在页面上进行输入参数来调用接口~

    Maven工程的目录如下:

    本文只是一个简单的整合示例,大家只要操作一下就能出来结果。

    接下来讲解Swagger 常用注解使用

    --@Api()用于类;

    表示这个类是一个swagger的资源。它有两个属性,分别是:

    String value();---也是说明,可以使用tags替代 

    String[] tags();---是一个数组,表示说明,tags如果有多个值,会生成多个list;

    例如:

    @Api(value="用户controller",tags={"用户操作接口"})
    @RestController
    public class UserController {
    
    }
     

    ui效果图:

    --@ApiOperation()用于方法;

    表示一个http请求的操作 ,它有4个常用属性:

    String value();--用于方法描述;

    String notes();--用于提示内容 

    String[] tags();--可以重新分组(视情况而用)

    String httpMethod(); --请求方法类型,例如:httpMethod=“GET”;

    --@ApiParam() 用于方法,参数,字段说明;表示对参数的添加元数据(说明或是否必填等) ,它有几个常用参数:

    String name();--参数名

    String value();--参数说明 

    boolean required();--是否必填

    boolean allowEmptyValue();--是否允许有空值

    例如:

    @Api(value="用户controller",tags={"用户操作接口"})
    @RestController
    public class UserController {
         @ApiOperation(value="获取用户信息",tags={"获取用户信息copy"},notes="注意问题点")
         @GetMapping("/getUserInfo")
         public User getUserInfo(@ApiParam(name="id",value="用户id",required=true) Long id,@ApiParam(name="username",value="用户名") String username) {
         // userService可忽略,是业务逻辑
          User user = userService.getUserInfo();
          return user;
      }
    }
     

    ui效果图:

    --@ApiModel()用于类 ;表示对类进行说明,用于参数用实体类接收 
    value–表示对象名 
    description–描述 
    都可省略 
    --@ApiModelProperty()用于方法,字段; 表示对model属性的说明或者数据操作更改 
    value–字段说明 
    name–重写属性名字 
    dataType–重写属性类型 
    required–是否必填 
    example–举例说明 
    hidden–隐藏

    例如:

    @ApiModel(value="user对象",description="用户对象user")
    public class User implements Serializable{
        private static final long serialVersionUID = 1L;
         @ApiModelProperty(value="用户名",name="username",example="xingguo")
         private String username;
         @ApiModelProperty(value="状态",name="state",required=true)
          private Integer state;
          private String password;
          private String nickName;
          private Integer isDeleted;
     
          @ApiModelProperty(value="id数组",hidden=true)
          private String[] ids;
          private List<String> idList;
         //省略get/set
    }
    @ApiOperation("更改用户信息")
      @PostMapping("/updateUserInfo")
      public int updateUserInfo(@RequestBody @ApiParam(name="用户对象",value="传入json格式",required=true) User user){  
        
         //注意,一定要添加@RequestBody注解
    
         int num = userService.updateUserInfo(user);
         return num;
      }
    
    
     

    ui效果图:

    --@ApiIgnore()用于类或者方法上,可以不被swagger显示在页面上 
    比较简单, 这里不做举例

    --@ApiImplicitParam() 用于方法 
    表示单独的请求参数 
    @ApiImplicitParams() 用于方法,包含多个 @ApiImplicitParam 
    name–参数ming 
    value–参数说明 
    dataType–数据类型 
    paramType–参数类型 
    example–举例说明

    *****在controller层使用@RequestParam的时候,发现这个参数是必须要输入值的,但是我们有时候必须查询的时候允许参数为空,使用这个注解就不行了。但是使用@ApiImplicitParam这个注解可以解决这个问题。

    例如:

    @ApiOperation("查询测试")
      @GetMapping("select")
      //@ApiImplicitParam(name="name",value="用户名",dataType="String", paramType = "query")
      @ApiImplicitParams({
      @ApiImplicitParam(name="name",value="用户名",dataType="string", paramType = "query",example="xingguo"),
      @ApiImplicitParam(name="id",value="用户id",dataType="long", paramType = "query")})
      public void select(){
    
      }
     

    ui效果图:

    更加详细的文档,有兴趣的小伙伴可以访问swagger-ui的官网查看~

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  • 原文地址:https://www.cnblogs.com/zoro-zero/p/11492143.html
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