Http请求类

最新推荐文章于 2023-03-17 18:10:13 发布

转载最新推荐文章于 2023-03-17 18:10:13 发布 · 594 阅读

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本文介绍了一个Java类，用于发送HTTP GET和POST请求，并处理响应。该类支持设置连接超时时间，自定义请求参数及编码。

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;

public class HttpRequest {

public static String addUrl(String head, String tail) {
  if (head.endsWith("/")) {
   if (tail.startsWith("/")) {
    return head.substring(0, head.length() - 1) + tail;
   } else {
    return head + tail;
   }
  } else {
   if (tail.startsWith("/")) {
    return head + tail;
   } else {
    return head + "/" + tail;
   }
  }
}

public synchronized static String getData(String urlAndParams, String codePage) throws Exception {
  final HttpClient httpClient = new HttpClient();
  httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(10 * 1000);
  httpClient.getHttpConnectionManager().getParams().setSoTimeout(10 * 1000);


  final GetMethod method = new GetMethod(urlAndParams);
  String result = "";
  try {
   httpClient.executeMethod(method);
   result = new String(method.getResponseBody(), codePage);
  } catch (final Exception e) {
   throw e;
  } finally {
   method.releaseConnection();
  }
  return result;

}

public synchronized static String postData(String url, Map<String, String> params, String codePage) throws Exception {

  final HttpClient httpClient = new HttpClient();
  httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(10 * 1000);
  httpClient.getHttpConnectionManager().getParams().setSoTimeout(10 * 1000);

  final PostMethod method = new PostMethod(url);
  if (params != null) {
   method.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET, codePage);
   method.setRequestBody(assembleRequestParams(params));
  }
  String result = "";
  try {
   httpClient.executeMethod(method);
   result = new String(method.getResponseBody(), codePage);
  } catch (final Exception e) {
   throw e;
  } finally {
   method.releaseConnection();
  }
  return result;
}

public synchronized static String postData(String url, String codePage) throws Exception {
  final HttpClient httpClient = new HttpClient();
  httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(10 * 1000);
  httpClient.getHttpConnectionManager().getParams().setSoTimeout(10 * 1000);

  final GetMethod method = new GetMethod(url);
  String result = "";
  try {
   httpClient.executeMethod(method);
   result = new String(method.getResponseBody(), codePage);
  } catch (final Exception e) {
   throw e;
  } finally {
   method.releaseConnection();
  }
  return result;
}

/**
* 组装http请求参数
*
* @param params
* @param menthod
* @return
*/
private synchronized static NameValuePair[] assembleRequestParams(Map<String, String> data) {
final List<NameValuePair> nameValueList = new ArrayList<NameValuePair>();

  Iterator<Map.Entry<String, String>> it = data.entrySet().iterator();
  while (it.hasNext()) {
   Map.Entry<String, String> entry = (Map.Entry<String, String>) it.next();
   nameValueList.add(new NameValuePair((String) entry.getKey(), (String) entry.getValue()));
  }

return nameValueList.toArray(new NameValuePair[nameValueList.size()]);
}

}