spring boot封装HttpClient的示例代码

spring boot封装封装HttpClient的示例代码的示例代码

主要介绍了spring boot封装HttpClient的示例代码，小编觉得挺不错的，现在分享给大家，也给大家做个参考。

一起跟随小编过来看看吧

最近使用到了HttpClient，看了一下官方文档：HttpClient implementations are expected to be thread safe. It is recommended

that the same instance of this class is reused for multiple request executions，翻译过来的意思就是：HttpClient的实现是线

程安全的，可以重用相同的实例来执行多次请求。遇到这种描述的话，我们就应该想到，需要对HttpClient来进行封装了。由

于是使用的spring boot，所以下面来结合spring boot来封装HttpClient。

一、一、Request retry handler(请求重试处理请求重试处理)

import org.apache.http.HttpEntityEnclosingRequest;

import org.apache.http.HttpRequest;

import org.apache.http.NoHttpResponseException;

import org.apache.http.client.HttpRequestRetryHandler;

import org.apache.http.client.protocol.HttpClientContext;

import org.apache.http.conn.ConnectTimeoutException;

import org.apache.http.protocol.HttpContext;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

@Value("${httpclient.config.retryTime}")// 此处建议采用@ConfigurationProperties(prefix="httpclient.config")方式，方便复用

private int retryTime;

@Bean

public HttpRequestRetryHandler httpRequestRetryHandler() {

// 请求重试

final int retryTime = this.retryTime;

return new HttpRequestRetryHandler() {

public boolean retryRequest(IOException exception, int executionCount, HttpContext context) {

return true;

}

// time out 超时重试

if (exception instanceof InterruptedIOException) {

return true;

}

// Unknown host

if (exception instanceof UnknownHostException) {

return false;

}

return false;

}

HttpClientContext clientContext = HttpClientContext.adapt(context);

HttpRequest request = clientContext.getRequest();

if (!(request instanceof HttpEntityEnclosingRequest)) {

return true;

}

return false;

}

};