HttpClient httpclient = new HttpClient() 报错

根据提供的引用内容，可以得知在`HttpClient client = new HttpClient()`这行代码中，`HttpClient`是一个类的实例化对象，但是没有提供类的具体信息，所以很可能是缺少了相关的依赖库。
根据引用，正确的实例化`HttpClient`的方式应该是`HttpClient client = HttpClients.createDefault()`，这里使用了`HttpClients`类中的静态方法`createDefault()`来获取一个默认的`HttpClient`实例。
因此，如果在你的代码中出现`HttpClient client = new HttpClient()`报错，很可能是由于缺少了相关的依赖库。
根据引用，可以看到正确的依赖库配置应该是：

<dependency>
  <groupId>org.apache.httpcomponents</groupId>
  <artifactId>httpclient</artifactId>
  <version>4.5.13</version>
</dependency>

所以，你可以尝试添加上述的依赖库到你的项目中，然后再次编译和运行代码，这样就能够正确地实例化`HttpClient`对象了。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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