feign动态设置数据源（https请求）

1、背景

在使用

springboot-feign/spingcloud-feign时，需要在启动springboot的时候，注入的方式将feigncofing配置好，也就是说项目启动以后只能有一个数据源，且不能修改，在网上找了很多资料没有找到解决方案（网上应该有，只是我没有找到），后面只能是硬着头皮看源码，问题解决 2、代码

其实在这里用的原生的feign，并不是springboot/springcloud封装的feign，废话不说，上代码

public final class HttpsUtil { public static <T> T getRemote(Class<T> apiType, String url, String apiCert, String certPassWord) { // apiCert 是p12文件读了以后的数据，可以把p12文件放在本地，我这里是伪代码了 feign.Client.Default client = FeignClient(apiCert, certPassWord); Decoder decoder = (response, type) -> { final String result = IOUtils.toString(response.body().asInputStream(), StandardCharsets.UTF_8); if (String.class.getName() == type.getTypeName()) { return result; } try { return JSON.parseObject(result, type); } catch (Exception e) { log.error(“json parse exception”); } return result; }; ErrorDecoder errorDecoder = (methodKey, response) -> { try { final String result = IOUtils.toString(response.body().asInputStream(), StandardCharsets.UTF_8); log.info(“feign client decoder response body : {}”, result); throw new SysStatusException(response.status(), result); } catch (IOException e) { log.info(“feign client decoder response error {}”, e); } throw new BizStatusException(response.status(), BizCommMessage.ERROR_MSG); }; T remote = Feign.builder() .decoder(decoder) .errorDecoder(errorDecoder) .client(url) .target(apiType, client); return remote; } public static Client getFeignClient(String apiCert, String certPassWord) { final SSLSocketFactory sslSocketFactory = getSSLSocketFactory(apiCert, certPassWord); feign.Client.Default aDefault = new Client.Default(sslSocketFactory, new NoopHostnameVerifier()); return aDefault; } public static SSLSocketFactory getSSLSocketFactory(String apiCert, String certPassWord) { byte[] bytes = apiCert.getBytes(); try (ByteArrayInputStream inputStream = new ByteArrayInputStream(bytes)) { KeyStore keyStore = KeyStore.getInstance(KEY_STORE_TYPE); keyStore.load(inputStream, certPassWord.toCharArray()); SSLContext sslContext = SSLContexts.custom() // 忽略掉对服务器端证书的校验,特别重要，被这行代码坑过 .loadTrustMaterial((TrustStrategy) (chain, authType) -> true) .loadKeyMaterial(keyStore, certPassWord.toCharArray()) .build(); return sslContext.getSocketFactory(); } catch (IOException e) { log.error(“=======init feign client throw IOException======={}”, e); } catch (KeyStoreException e) { log.error(“=======init feign client throw KeyStoreException======={}”, e); } catch (UnrecoverableKeyException e) { log.error(“=======init feign client throw UnrecoverableKeyException======={}”, e); } catch (CertificateException e) { log.error(“=======init feign client throw CertificateException======={}”, e); } catch (NoSuchAlgorithmException e) { log.error(“=======init feign client throw NoSuchAlgorithmException======={}”, e); } catch (KeyManagementException e) { log.error(“=======init feign client throw KeyManagementException======={}”, e); } return null; } }2.2、 编写请求方法public interface TestRemote { @Override @RequestLine(“POST /apis/{test}/query”) @Headers({“Content-Type: application/json”,“Accept: application/json”}) @Body(“{body}”) String query(@Param(“test”) String test, @Param(“body”) String body); }2.3、发送请求public static void main(String[] args) { TestRemote testRemote = HttpsUtil.getRemote(TestRemote.class,String url, String apiCert, String certPassWord); testRemote.query(“test”,“{\”id\”:1}”); }总结：

这样就可以根据前端传来的参数，切换不同的客户端