httpclient简单发送http request

最新推荐文章于 2025-06-17 20:26:07 发布

LyuZheng

最新推荐文章于 2025-06-17 20:26:07 发布

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分类专栏： java

本文链接：https://blog.youkuaiyun.com/Georgee1992/article/details/80615659

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本文介绍了一种使用Java中的HttpClient库向指定URL发送JSON格式数据的方法，并详细解释了如何设置请求头信息、处理响应以及设置超时配置。

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public void send(String data){
        StringEntity content = new StringEntity(data, ContentType.create("application/json","UTF-8"));

        HttpPost httpPost = new HttpPost("http://...");
        httpPost.setEntity(content);
        httpPost.addHeader("connection","keep-alive");
        httpPost.addHeader("content-type","application/json");

        CloseableHttpResponse response = this.httpClient.execute(httpPost);

        logger.debug("sent:\n"+data);
        try{
            StringBuilder sb = new StringBuilder("response:\n");
            HeaderIterator it = response.headerIterator();
            while(it.hasNext()){
                sb.append(it.next()+"\n");
            }
            String responseBody = EntityUtils.toString(response.getEntity());
            sb.append(responseBody);
            logger.debug(sb.toString());
        }finally{
            response.close();
        }
}

注意点：默认HttpClient.execute如对方不响应，会无限等待，需要设置timeout，比如：

        RequestConfig defaultRequestConfig = RequestConfig.custom()
                .setSocketTimeout(5000)
                .setConnectTimeout(5000)
                .setConnectionRequestTimeout(5000)
                .build();
        this.httpClient = HttpClients.custom()
                .setDefaultRequestConfig(defaultRequestConfig)
                .build();

另外具体request，比如HttpPost也可以覆盖这个设置