HttpClient模拟get，post请求并发送请求参数（json等）

package com.citics.crm.customerwidget.utils; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.util.Map; import net.sf.json.JSONArray; import net.sf.json.JSONObject; import net.sf.json.util.JSONTokener; import org.apache.commons.httpclient.DefaultHttpMethodRetryHandler; import org.apache.commons.httpclient.Header; import org.apache.commons.httpclient.HttpClient; import org.apache.commons.httpclient.HttpException; import org.apache.commons.httpclient.HttpMethod; import org.apache.commons.httpclient.HttpStatus; import org.apache.commons.httpclient.methods.GetMethod; import org.apache.commons.httpclient.methods.PostMethod; import org.apache.commons.httpclient.params.HttpMethodParams; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.methods.HttpPost; import org.apache.http.entity.StringEntity; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.util.EntityUtils; /** * HTTP公用类 所需包:Commons-httpclient.jar,commons-codec-1.3.jar 学习参见网址: * https://www.ibm.com/developerworks/cn/opensource/os-cn-crawler/ * */ public class HttpClientUtil2 { public static void main(String arg[]) throws Exception { String url = "http://mds.dev.citicsinfo.com/customer/createIdv.json"; JSONObject params = new JSONObject(); params.put("SRC_STM_CODE", "wsf"); params.put("TENANT_ID", "123"); params.put("NM", "张三"); params.put("BRTH_DT", "1983-01-20"); params.put("GND_CODE", "1"); JSONArray params2 = new JSONArray(); JSONObject param3 = new JSONObject(); param3.put("DOC_TP_CODE", "10100"); param3.put("DOC_NBR", "100200198301202210"); param3.put("DOC_CUST_NM", "test"); params2.add(param3); params.put("DOCS", params2); //doPost(url, null, "utf-8", true); // 测试ok System.out.println(doPost(url, params).toString()); } /** * httpClient的get请求方式 * * @param url * = "https://www.99bill.com/webapp/receiveDrawbackAction.do"; * @param charset * = ="utf-8"; * @return * @throws Exception */ public static String doGet2(String url, String charset) throws Exception { HttpClient client = new HttpClient(); GetMethod method1 = new GetMethod(url); if (null == url || !url.startsWith("http")) { throw new Exception("请求地址格式不对"); } // 设置请求的编码方式 if (null != charset) { method1.addRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=" + charset); } else { method1.addRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=" + "utf-8"); } int statusCode = client.executeMethod(method1); if (statusCode != HttpStatus.SC_OK) {// 打印服务器返回的状态 System.out.println("Method failed: " + method1.getStatusLine()); } // 返回响应消息 byte[] responseBody = method1.getResponseBodyAsString().getBytes( method1.getResponseCharSet()); // 在返回响应消息使用编码(utf-8或gb2312) String response = new String(responseBody, "utf-8"); System.out.println("------------------response:" + response); // 释放连接 method1.releaseConnection(); return response; } /** * httpClient的get请求方式2 * * @param url * = "https://www.99bill.com/webapp/receiveDrawbackAction.do"; * @param charset * = ="utf-8"; * @return * @throws Exception */ public static String doGet(String url, String charset) throws Exception { /* * 使用 GetMethod 来访问一个 URL 对应的网页,实现步骤: 1:生成一个 HttpClinet 对象并设置相应的参数。 * 2:生成一个 GetMethod 对象并设置响应的参数。 3:用 HttpClinet 生成的对象来执行 GetMethod 生成的Get * 方法。 4:处理响应状态码。 5:若响应正常，处理 HTTP 响应内容。 6:释放连接。 */ /* 1 生成 HttpClinet 对象并设置参数 */ HttpClient httpClient = new HttpClient(); // 设置 Http 连接超时为5秒 httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(5000); /* 2 生成 GetMethod 对象并设置参数 */ GetMethod getMethod = new GetMethod(url); // 设置 get 请求超时为 5 秒 getMethod.getParams().setParameter(HttpMethodParams.SO_TIMEOUT, 5000); // 设置请求重试处理，用的是默认的重试处理：请求三次 getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler()); String response = ""; /* 3 执行 HTTP GET 请求 */ try { int statusCode = httpClient.executeMethod(getMethod); /* 4 判断访问的状态码 */ if (statusCode != HttpStatus.SC_OK) { System.err.println("Method failed: " + getMethod.getStatusLine()); } /* 5 处理 HTTP 响应内容 */ // HTTP响应头部信息，这里简单打印 Header[] headers = getMethod.getResponseHeaders(); for (Header h : headers) System.out.println(h.getName() + "------------ " + h.getValue()); // 读取 HTTP 响应内容，这里简单打印网页内容 byte[] responseBody = getMethod.getResponseBody();// 读取为字节数组 response = new String(responseBody, charset); System.out.println("----------response:" + response); // 读取为 InputStream，在网页内容数据量大时候推荐使用 // InputStream response = getMethod.getResponseBodyAsStream(); } catch (HttpException e) { // 发生致命的异常，可能是协议不对或者返回的内容有问题 System.out.println("Please check your provided http address!"); e.printStackTrace(); } catch (IOException e) { // 发生网络异常 e.printStackTrace(); } finally { /* 6 .释放连接 */ getMethod.releaseConnection(); } return response; } /** * 执行一个HTTP POST请求，返回请求响应的HTML * * * @param url * 请求的URL地址 * @param params * 请求的查询参数,可以为null * @param charset * 字符集 * @param pretty * 是否美化 * @return 返回请求响应的HTML */ public static String doPost(String url, Map<String,Object> _params,String charset, boolean pretty) { StringBuffer response = new StringBuffer(); HttpClient client = new HttpClient(); HttpMethod method = new PostMethod(url); // 设置Http Post数据 if (_params != null) { HttpMethodParams p = new HttpMethodParams(); for (Map.Entry<String,Object> entry :_params.entrySet()) { p.setParameter(entry.getKey(), entry.getValue()); } method.setParams(p); } try { client.executeMethod(method); if (method.getStatusCode() == HttpStatus.SC_OK) { // 读取为 InputStream，在网页内容数据量大时候推荐使用 BufferedReader reader = new BufferedReader(new InputStreamReader(method.getResponseBodyAsStream(),charset)); String line; while ((line = reader.readLine()) != null) { if (pretty) response.append(line).append(System.getProperty("line.separator")); else response.append(line); } reader.close(); } } catch (IOException e) { System.out.println("执行HTTP Post请求" + url + "时，发生异常！"); e.printStackTrace(); } finally { method.releaseConnection(); } System.out.println("--------------------" + response.toString()); return response.toString(); } public static JSONObject doPost(String url,JSONObject json){ DefaultHttpClient client = new DefaultHttpClient(); HttpPost post = new HttpPost(url); JSONObject response = null; try { StringEntity s = new StringEntity(json.toString()); s.setContentEncoding("UTF-8"); s.setContentType("application/json"); post.setEntity(s); HttpRes