基于HttpClient4.5.1实现Http访问工具类
本工具类基于httpclient4.5.1实现
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.1</version>
</dependency>
import java.io.IOException; import java.io.UnsupportedEncodingException; import java.net.URISyntaxException; import java.util.ArrayList; import java.util.Map; import org.apache.http.HttpEntity; import org.apache.http.NameValuePair; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.CloseableHttpResponse; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.client.methods.HttpRequestBase; import org.apache.http.client.utils.URIBuilder; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.impl.conn.PoolingHttpClientConnectionManager; import org.apache.http.message.BasicNameValuePair; import org.apache.http.util.EntityUtils; /** * * @author Nan 2015-11 */ public class HttpClientUtil { private static PoolingHttpClientConnectionManager cm; private static String EMPTY_STR = ""; private static String UTF_8 = "UTF-8"; private static void init() { if (cm == null) { cm = new PoolingHttpClientConnectionManager(); cm.setMaxTotal(50);// 整个连接池最大连接数 cm.setDefaultMaxPerRoute(5);// 每路由最大连接数，默认值是2 } } /** * 通过连接池获取HttpClient * * @return */ private static CloseableHttpClient getHttpClient() { init(); return HttpClients.custom().setConnectionManager(cm).build(); } /** * * @param url * @return */ public static String httpGetRequest(String url) { HttpGet httpGet = new HttpGet(url); return getResult(httpGet); } public static String httpGetRequest(String url, Map<String, Object> params) throws URISyntaxException { URIBuilder ub = new URIBuilder(); ub.setPath(url); ArrayList<NameValuePair> pairs = covertParams2NVPS(params); ub.setParameters(pairs); HttpGet httpGet = new HttpGet(ub.build()); return getResult(httpGet); } public static String httpGetRequest(String url, Map<String, Object> headers, Map<String, Object> params) throws URISyntaxException { URIBuilder ub = new URIBuilder(); ub.setPath(url); ArrayList<NameValuePair> pairs = covertParams2NVPS(params); ub.setParameters(pairs); HttpGet httpGet = new HttpGet(ub.build()); for (Map.Entry<String, Object> param : headers.entrySet()) { httpGet.addHeader(param.getKey(), String.valueOf(param.getValue())); } return getResult(httpGet); } public static String httpPostRequest(String url) { HttpPost httpPost = new HttpPost(url); return getResult(httpPost); } public static String httpPostRequest(String url, Map<String, Object> params) throws UnsupportedEncodingException { HttpPost httpPost = new HttpPost(url); ArrayList<NameValuePair> pairs = covertParams2NVPS(params); httpPost.setEntity(new UrlEncodedFormEntity(pairs, UTF_8)); return getResult(httpPost); } public static String httpPostRequest(String url, Map<String, Object> headers, Map<String, Object> params) throws UnsupportedEncodingException { HttpPost httpPost = new HttpPost(url); for (Map.Entry<String, Object> param : headers.entrySet()) { httpPost.addHeader(param.getKey(), String.valueOf(param.getValue())); } ArrayList<NameValuePair> pairs = covertParams2NVPS(params); httpPost.setEntity(new UrlEncodedFormEntity(pairs, UTF_8)); return getResult(httpPost); } private static ArrayList<NameValuePair> covertParams2NVPS(Map<String, Object> params) { ArrayList<NameValuePair> pairs = new ArrayList<NameValuePair>(); for (Map.Entry<String, Object> param : params.entrySet()) { pairs.add(new BasicNameValuePair(param.getKey(), String.valueOf(param.getValue()))); } return pairs; } /** * 处理Http请求 * * @param request * @return */ private static String getResult(HttpRequestBase request) { // CloseableHttpClient httpClient = HttpClients.createDefault(); CloseableHttpClient httpClient = getHttpClient(); try { CloseableHttpResponse response = httpClient.execute(request); // response.getStatusLine().getStatusCode(); HttpEntity entity = response.getEntity(); if (entity != null) { // long len = entity.getContentLength();// -1 表示长度未知 String result = EntityUtils.toString(entity); response.close(); // httpClient.close(); return result; } } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { } return EMPTY_STR; } }
Json版本
import net.sf.json.JSONObject; import org.apache.commons.httpclient.HttpStatus; import org.apache.http.HttpResponse; import org.apache.http.client.methods.HttpGet; 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; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.IOException; import java.net.URLDecoder; public class HttpRequestUtils { private static Logger logger = LoggerFactory.getLogger(HttpRequestUtils.class); //日志记录 /** * httpPost * @param url 路径 * @param jsonParam 参数 * @return */ public static JSONObject httpPost(String url,JSONObject jsonParam){ return httpPost(url, jsonParam, false); } /** * post请求 * @param url url地址 * @param jsonParam 参数 * @param noNeedResponse 不需要返回结果 * @return */ public static JSONObject httpPost(String url,JSONObject jsonParam, boolean noNeedResponse){ //post请求返回结果 DefaultHttpClient httpClient = new DefaultHttpClient(); JSONObject jsonResult = null; HttpPost method = new HttpPost(url); try { if (null != jsonParam) { //解决中文乱码问题 StringEntity entity = new StringEntity(jsonParam.toString(), "utf-8"); entity.setContentEncoding("UTF-8"); entity.setContentType("application/json"); method.setEntity(entity); } HttpResponse result = httpClient.execute(method); url = URLDecoder.decode(url, "UTF-8"); /**请求发送成功，并得到响应**/ if (result.getStatusLine().getStatusCode() == 200) { String str = ""; try { /**读取服务器返回过来的json字符串数据**/ str = EntityUtils.toString(result.getEntity()); if (noNeedResponse) { return null; } /**把json字符串转换成json对象**/ jsonResult = JSONObject.fromObject(str); } catch (Exception e) { logger.error("post请求提交失败:" + url, e); } } } catch (IOException e) { logger.error("post请求提交失败:" + url, e); } return jsonResult; } /** * 发送get请求 * @param url 路径 * @return */ public static JSONObject httpGet(String url){ //get请求返回结果 JSONObject jsonResult = null; try { DefaultHttpClient client = new DefaultHttpClient(); //发送get请求 HttpGet request = new HttpGet(url); HttpResponse response = client.execute(request); /**请求发送成功，并得到响应**/ if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { /**读取服务器返回过来的json字符串数据**/ String strResult = EntityUtils.toString(response.getEntity()); /**把json字符串转换成json对象**/ jsonResult = JSONObject.fromObject(strResult); url = URLDecoder.decode(url, "UTF-8"); } else { logger.error("get请求提交失败:" + url); } } catch (IOException e) { logger.error("get请求提交失败:" + url, e); } return jsonResult; } }
