如何在java中使用客户端接口获取远程文件答案

【问题标题】：How to fetch remote file using Client Interface in java如何在java中使用客户端接口获取远程文件
【发布时间】：2016-08-03 07:22:08
【问题描述】：

我有一个远程位于 url 的文件：www.something.com/abc.txt。

我想获取这个远程文件(abc.txt) 并使用“客户端”接口将其存储在InputStream 或String 对象中。

【问题讨论】：

Reading a remote file using Java的可能重复

标签： java string httpclient inputstream

【解决方案1】：

这很简单：

HttpClient client = new HttpClient();
String url = "http://www.example.com/README.txt";
// Create a method instance.
GetMethod method = new GetMethod(url);
// Provide custom retry handler is necessary
method.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,
            new DefaultHttpMethodRetryHandler(3, false));
byte[] responseBody = method.getResponseBody();
String fileContents = new String(responseBody);

Here 也是一个很好的教程，可以帮助你

希望有帮助

【讨论】：

【解决方案2】：

你可以这样做：

import org.apache.commons.io.IOUtils;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import java.io.IOException;

public class HttpClientUtil {

    public static void main(String... args) {

        CloseableHttpClient httpClient = HttpClients.custom().build();
        CloseableHttpResponse response = null;

        try {

            HttpGet httpGet = new HttpGet("http://txt2html.sourceforge.net/sample.txt");
            httpGet.setHeader("Content-Type", "text/plain");
            response = httpClient.execute(httpGet);

            String strValue = EntityUtils.toString(response.getEntity());
            System.out.println(strValue);

        } catch (IOException e) {
            System.out.println(e.getMessage());
        } finally {
            IOUtils.closeQuietly(response);
            IOUtils.closeQuietly(httpClient);
        }

    }
}

这是依赖项。

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.3.2</version>
</dependency>
<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpcore</artifactId>
    <version>4.3.1</version>
</dependency>
<dependency>
    <groupId>commons-logging</groupId>
    <artifactId>commons-logging</artifactId>
    <version>1.2</version>
</dependency>
<dependency>
    <groupId>commons-codec</groupId>
    <artifactId>commons-codec</artifactId>
    <version>1.10</version>
</dependency>
<dependency>
    <groupId>commons-io</groupId>
    <artifactId>commons-io</artifactId>
    <version>2.5</version>
</dependency>

【讨论】：