Commons-httpclient的使用技巧，更方便的模拟http请求！

最新推荐文章于 2024-10-24 11:33:37 发布

转载最新推荐文章于 2024-10-24 11:33:37 发布 · 1.1k 阅读

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#string #url #null #iterator #jar

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本文介绍了如何使用 HttpClient 库实现 HTTP GET 和 POST 请求，并详细解释了如何设置编码以防止乱码问题。

本文来自：http://lavasoft.blog.51cto.com/62575/168276/

另外一个好文章：

http://www.blogjava.net/willpower88/archive/2008/04/14/192679.html

需要jar包：

common-codec

common.httpclient

public static void main(String[] args) { //请求地址 String url = "http://localhost:8080/moneyManager/game"; doGet(url); Map<String,String> params = new HashMap<String,String>(); params.put("gameName", "仙剑奇侠传5"); params.put("clickCount", "4"); //String str = doPost(url,params); //System.out.println(str); } public static void doGet(String url){ String queryString = ""; String response = null; HttpClient client = new HttpClient(); //防止乱码 client.getParams().setParameter( HttpMethodParams.HTTP_CONTENT_CHARSET, "UTF-8"); //设置编码的三种方式 //postMethod.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET, "UTF-8"); //postMethod.addRequestHeader("Content-Type","text/html;charset=UTF-8"); //postMethod.setRequestHeader("Content-Type", "text/html;charset=UTF-8"); HttpMethod method = new GetMethod(url); try { if (queryString!=null&&!"".equals(queryString)) method.setQueryString(URIUtil.encodeQuery(queryString)); //method.set client.executeMethod(method); if (method.getStatusCode() == HttpStatus.SC_OK) { response = method.getResponseBodyAsString(); } } catch (URIException e) { // log.error("执行HTTP Get请求时，编码查询字符串“" + queryString + "”发生异常！", e); } catch (IOException e) { //log.error("执行HTTP Get请求" + url + "时，发生异常！", e); } finally { method.releaseConnection(); } System.out.println(response); } public static String doPost(String url, Map<String, String> params) { String response = null; HttpClient client = new HttpClient(); HttpMethod method = new PostMethod(url); for (Iterator it = params.entrySet().iterator(); it.hasNext();) { } //设置Http Post数据 if (params != null) { HttpMethodParams p = new HttpMethodParams(); for (Map.Entry<String, String> entry : params.entrySet()) { p.setParameter(entry.getKey(), entry.getValue()); } method.setParams(p); } try { client.executeMethod(method); if (method.getStatusCode() == HttpStatus.SC_OK) { response = method.getResponseBodyAsString(); } } catch (IOException e) { //log.error("执行HTTP Post请求" + url + "时，发生异常！", e); System.out.println("执行HTTP Post请求" + url + "时，发生异常！"); } finally { method.releaseConnection(); } return response; }

注意代码中设置编码，防止出现乱码