不推荐使用Java HttpClient - 它有多难？ [英] Deprecated Java HttpClient - How hard can it be?

问题描述

我要做的就是下载一些JSON并将其反序列化为一个对象。我还没有下载JSON。

All I'm trying to do is download some JSON and deserialize it into an object. I haven't got as far as downloading the JSON yet.

几乎我能找到的每个HttpClient示例，包括apache站点上的那些看起来像...... / p>

Almost every single HttpClient example I can find, including those on the apache site looks something like...

import org.apache.http.client.HttpClient;
import org.apache.http.impl.client.DefaultHttpClient;

public void blah() {
    HttpClient client = new DefaultHttpClient();
    ...
}

然而，Netbeans告诉我 DefaultHttpClient 已弃用。我已经尝试使用谷歌搜索 DefaultHttpClient已弃用以及我能想到的许多其他变体，但找不到任何有用的结果，所以我显然遗漏了一些东西。

However, Netbeans tells me that DefaultHttpClient is deprecated. I've tried googling for DefaultHttpClient deprecated and as many other variations as I can think of and can't find any useful results, so I'm obviously missing something.

下载网页内容的正确Java7方式是什么？作为语言的一部分，真的没有像样的Http Client吗？我觉得很难相信。

What is the correct Java7 way to download the contents of a webpage? Is there really no decent Http Client as part of the language? I find that hard to believe.

My Maven对此的依赖是......

My Maven dependency for this is...

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>LATEST</version>
    <type>jar</type>
</dependency>

推荐答案

相关进口商品：

import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import java.io.IOException;

用法：

HttpClient httpClient = HttpClientBuilder.create().build();

编辑（在Jules的建议之后）：

EDIT (after Jules' suggestion):

当 build（）方法返回 CloseableHttpClient 其中是-a AutoClosable ，您可以将声明放在try-with-resources语句中（Java 7 +）：

As the build() method returns a CloseableHttpClient which is-a AutoClosable, you can place the declaration in a try-with-resources statement (Java 7+):

try (CloseableHttpClient httpClient = HttpClientBuilder.create().build()) {

    // use httpClient (no need to close it explicitly)

} catch (IOException e) {

    // handle

}

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