springboot集成knife4j(swagger2)

一、在maven pom.xml文件中添加knife4j依赖

• 方式一、添加knife4j-starter只需要添加一个即可

		<!--knife4j-->
		<dependency>
			<groupId>com.github.xiaoymin</groupId>
			<artifactId>knife4j-spring-boot-starter</artifactId>
			<version>2.0.2</version>
		</dependency>

• 方式二、添加swagger2依赖的话需要添加

		<!--swagger2 start-->
		<dependency>
			<groupId>io.springfox</groupId>
			<artifactId>springfox-swagger2</artifactId>
			<version>2.9.2</version>
		</dependency>
		<dependency>
			<groupId>com.github.xiaoymin</groupId>
			<artifactId>swagger-bootstrap-ui</artifactId>
			<version>${lastVersion}</version>
		</dependency>
		<!--swagger2 end-->

二、添加配置

package com.kangqiao.openapi.config;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.RequestMethod;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.builders.ResponseMessageBuilder;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.Contact;
import springfox.documentation.service.ResponseMessage;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.Arrays;

/**
 * @author liouwb
 */
@Configuration
@EnableSwagger2
public class SwaggerConfig {

    @Bean
    Docket createRestApi() {
        ResponseMessage requestParameterError = new ResponseMessageBuilder().code(400).message("Request Parameter Error").build();
        ResponseMessage notFound = new ResponseMessageBuilder().code(404).message("Not Found").build();
        ResponseMessage internalServerError = new ResponseMessageBuilder().code(500).message("Internal Server Error").build();

        return new Docket(DocumentationType.SWAGGER_2)
                .select()
                .apis(RequestHandlerSelectors.basePackage("com.controller"))
                .paths(PathSelectors.any())
                .build()
                .pathMapping("/")

                // 以字符串代替日期格式显示
                .directModelSubstitute(LocalDate.class, String.class)
                .directModelSubstitute(LocalDateTime.class, String.class)
                .genericModelSubstitutes(ResponseEntity.class)

                // 页面显示信息
                .apiInfo(apiInfo())
                .enable(true)

                // 设置全局自定义异常消息返回
                .useDefaultResponseMessages(false)
                .globalResponseMessage(RequestMethod.GET, Arrays.asList(requestParameterError, notFound, internalServerError))
                .globalResponseMessage(RequestMethod.POST, Arrays.asList(requestParameterError, internalServerError))
                .globalResponseMessage(RequestMethod.PUT, Arrays.asList(requestParameterError, internalServerError))
                .globalResponseMessage(RequestMethod.OPTIONS, Arrays.asList(requestParameterError, internalServerError))
                .globalResponseMessage(RequestMethod.DELETE, Arrays.asList(requestParameterError, internalServerError));
    }


    private ApiInfo apiInfo() {
        return new ApiInfo("swagger2  API",
                "swagger2 API 文档",
                "1.0.0",
                "/",
                new Contact("swagger2 API文档", "/doc.html", ""),
                "",
                "",
                new ArrayList<>());
    }
}

三、在项目中使用swagger注解

• 在controller中和请求、返回实体类上加上swagger注解就可以

/**
 * @author liouwb
 */
@RestController
@RequestMapping(value = "test", produces = MediaType.APPLICATION_PROBLEM_JSON_VALUE)
@Api(tags = "测试swagger")
public class TestController {
    /**
     * 获取access_token
     *
     * @param req
     * @return
     */
    @PostMapping("test")
    @ApiOperation(value = "swagger测试")
    public TestResp test(@RequestBody TestReq req) {
        TestResp resp = new TestResp();
        resp.setResult("hello world");

        return resp;
    }
}

• 请求类添加swagger注解

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;

/**
 * @author liouwb
 */
@ApiModel(value = "测试Swagger请求")
public class TestReq {
    @ApiModelProperty(value = "测试字符串")
    private String testString;


    public String getTestString() {
        return testString;
    }

    public void setTestString(String testString) {
        this.testString = testString;
    }
}

• 返回类添加swagger注解

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;

/**
 * @author liouwb
 */
@ApiModel(value = "测试Swagger请求")
public class TestResp {
    @ApiModelProperty(value = "测试字符串")
    private String result;


    public String getResult() {
        return result;
    }

    public void setResult(String result) {
        this.result = result;
    }
}

• swagger注解类型
  

四、启动项目之后访问路径：http://${host}:${port}/doc.html

• 查看在线文档
  

• 导出离线文档
  

• 在线接口调试