使用httpclient 4.0.1添加用户代理

Question

我需要使用库httpclient 4.0.1

添加用户代理

    HttpClientParams httpparams= new HttpClientParams();
    HttpClient httpclient = new HttpClient(httpparams);
    string userAgent = "my user agent";
    if (userAgent != null && userAgent.length() != 0) {
        httpclient.getParams().setParameter(CoreProtocolPNames.USER_AGENT, userAgent);
    }

我收到此错误消息：

错误：

找不到符号httpclient.getParams（）。setParameter（CoreProtocolPNames.USER_AGENT，userAgent）;

符号：

变量CoreProtocolPNames

Answer 1

import org.apache.http.params.CoreProtocolPNames;