SpringCloud基于Feign的可编程式接口调用实现

<!-- feign -->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>

@EnableFeignClients
@SpringBootApplication
public class OrderApplication {

    public static void main(String[] args) {
        SpringApplication.run(OrderApplication.class, args);
    }
}

package com.cxstar.client;

import com.alibaba.fastjson.JSONObject;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

@FeignClient("bookschina-service")
@RequestMapping("/bookschina")
public interface BookschinaClient {

    @GetMapping("/spiderBookList/{searchkey}/{pageno}")
    JSONObject searchBookschina(
            @PathVariable("searchkey") String searchKey,
            @PathVariable("pageno") Integer pageNo
    );

}

package com.cxstar;

import com.alibaba.fastjson.JSONObject;
import com.cxstar.client.BookschinaClient;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;


@Slf4j
@SpringBootTest
class OrderApplicationTests {

    @Autowired
    private BookschinaClient bookschinaClient;

    void booksChinaTest() {
    
		// 参数
        String searchKey = "东野圭吾";
        Integer pageNo = 1;
		// 调用
        JSONObject booksJB = bookschinaClient.searchBookschina(searchKey, pageNo);
        log.info(booksJB.toString());

    }

}

feign:
  client:
    config:
      default:                      # default 全局配置，局部配置的话可以换成请求的服务名称
        loggerLevel: NONE			# 日志级别 NONE BASIC HEADERS FULL

<!-- feign 连接池 -->
<dependency>
    <groupId>io.github.openfeign</groupId>
    <artifactId>feign-httpclient</artifactId>
</dependency>

feign:
  httpclient:
    enabled: true                   # 开启feign对 httpclient 的支持
    max-connections: 200            # 最大连接数
    max-connections-per-route: 50   # 每个请求接口的最大连接数