HttpClient使用详解

<!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient -->
<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.3</version>
</dependency>

public void get(String url) {
    CloseableHttpClient httpClient = HttpClientBuilder.create().build();
    CloseableHttpResponse response = null;
    try {
        // 创建Get请求
        HttpGet httpGet = new HttpGet(url);
        // 由客户端执行(发送)Get请求
        response = httpClient.execute(httpGet);
        // 从响应模型中获取响应实体
        HttpEntity responseEntity = response.getEntity();
        System.out.println("响应状态为:" + response.getStatusLine());
        if (responseEntity != null) {
            System.out.println("响应内容长度为:" + responseEntity.getContentLength());
            System.out.println("响应内容为:" + EntityUtils.toString(responseEntity));
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            // 释放资源
            if (httpClient != null) {
                httpClient.close();
            }
            if (response != null) {
                response.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}