http连接池
来源：互联网 发布：赣州教育软件代理 编辑：程序博客网 时间：2024/05/01 06:36
<!-- 开始：http连接池PoolingClientConnectionManager配置 --> <beans:bean id="connManager" class="org.apache.http.impl.conn.PoolingClientConnectionManager"> <beans:property name="maxTotal" value="50"/> <beans:property name="defaultMaxPerRoute" value="35"/> </beans:bean> <beans:bean id="httpclient" class="org.apache.http.impl.client.DefaultHttpClient"> <beans:constructor-arg> <beans:ref bean="connManager"/> </beans:constructor-arg> </beans:bean> <beans:bean id="httpClientUtil" class="com.api.pms.util.dilian.HttpClientUtil" init-method="initClient" destroy-method="destroyClient"> <beans:property name="httpclient" ref="httpclient"/> </beans:bean> <!-- 结束： http连接池PoolingClientConnectionManager配置 -->HttpClientUtil源码：
package com.api.pms.util.dilian;import java.io.IOException;import java.util.ArrayList;import java.util.Iterator;import java.util.List;import java.util.Map;import java.util.Set;import org.apache.http.Header;import org.apache.http.HeaderElement;import org.apache.http.HttpEntity;import org.apache.http.HttpRequest;import org.apache.http.HttpRequestInterceptor;import org.apache.http.HttpResponse;import org.apache.http.HttpResponseInterceptor;import org.apache.http.HttpStatus;import org.apache.http.NameValuePair;import org.apache.http.ParseException;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.entity.GzipDecompressingEntity;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.HttpDelete;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpPost;import org.apache.http.client.methods.HttpPut;import org.apache.http.entity.ContentType;import org.apache.http.entity.StringEntity;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.impl.client.DefaultHttpRequestRetryHandler;import org.apache.http.message.BasicNameValuePair;import org.apache.http.params.CoreConnectionPNames;import org.apache.http.protocol.HttpContext;import org.apache.http.util.EntityUtils;import org.apache.log4j.Logger;/*import org.apache.http.entity.mime.MultipartEntity;import org.apache.http.entity.mime.content.ByteArrayBody;import org.apache.http.entity.mime.content.ContentBody;*//** * http请求工具类 get,post * * */public class HttpClientUtil { private static Logger logger = Logger.getLogger(HttpClientUtil.class.getName()); //private static Logger logger = LoggerFactory.getLogger(HttpClientUtil.class); private static final String HEADER_ACCEPT_ENCODING = "Accept-Encoding"; private static final String ENCODING_GZIP = "gzip"; private DefaultHttpClient httpclient; public void setHttpclient(DefaultHttpClient httpclient) { this.httpclient = httpclient; } /** * 通过post提交方式获取url指定的资源和数据 * * @param url * @return * @throws DajieHttpRequestException */ public String postData(String url) throws Exception { return postData(url, null); } /** * 通过post提交方式获取url指定的资源和数据 * * @param url * @param nameValuePairs * 请求参数 * @return * @throws DajieHttpRequestException */ public String postData(String url, Map<String, String> params) throws Exception { return postData(url, params, null); } /** * 通过post提交方式获取url指定的资源和数据 * * @param url * @param nameValuePairs * 请求参数 * @param headers * 请求header参数 * @return * @throws DajieHttpRequestException */ public String postData(String url,Map<String, String> params, Map<String, String> headers) { long start = System.currentTimeMillis(); logger.info("postData url:"+url); String info=""; HttpPost httpPost = new HttpPost(url); try { if (headers != null && headers.size() > 0) { Set<Map.Entry<String, String>> set = headers.entrySet(); for (Iterator<Map.Entry<String, String>> it = set.iterator(); it .hasNext();) { Map.Entry<String, String> header = it.next(); if (header != null) { httpPost.setHeader(header.getKey(), header.getValue()); } } } List<NameValuePair> nameValuePairs=null; if(params!=null){ nameValuePairs = new ArrayList <NameValuePair>(); Set<String> keySet = params.keySet(); for(String key : keySet) { nameValuePairs.add(new BasicNameValuePair(key, params.get(key))); } } if (nameValuePairs != null && nameValuePairs.size() > 0) { httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs,"UTF-8")); } //请求超时 httpclient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT,50000); //读取超时 httpclient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT,50000); HttpResponse response = httpclient.execute(httpPost); if(HttpStatus.SC_OK==response.getStatusLine().getStatusCode()){ HttpEntity entity = response.getEntity(); if(entity == null){ return null; } info = EntityUtils.toString(entity, "UTF-8"); }else{ info="请求目标服务器链接失败,http状态码:"+response.getStatusLine().getStatusCode(); } return info; }catch(ClientProtocolException e){ info="协议错误"; // LogUtil.getLogger().error("该异常通常是协议错误导致,比如构造HttpGet对象时传入的协议不对(将'http'写成'htp')或者服务器端返回的内容不符合HTTP协议要求等,堆栈信息如下", e); }catch(ParseException e){ info=e.getMessage(); // LogUtil.getLogger().error(e.getMessage(), e); }catch(IOException e){ info="网络异常"; // LogUtil.getLogger().error("该异常通常是网络原因引起的,如HTTP服务器未启动等,堆栈信息如下", e); } finally { httpPost.releaseConnection(); long interval = System.currentTimeMillis() - start; logger.debug("{} 请求耗时：{} "+url+interval); } return info; } /** * 通过ContentType 为json的格式进行http传输 * @param url 远程url * @param content 传输内容 * @return * @throws DajieHttpRequestException */ public String postJSONData(String url, String content) throws Exception { long start = System.currentTimeMillis(); HttpPost httpPost = new HttpPost(url); try { if (content != null && content.length() > 0) { httpPost.setEntity(new StringEntity(content,ContentType.APPLICATION_JSON)); } HttpResponse response = httpclient.execute(httpPost); HttpEntity entity = response.getEntity(); if(entity == null){ return null; } String info = EntityUtils.toString(entity, "UTF-8"); return info; } catch (Exception e) { logger.debug("postData Exception url: {}"+url); throw new Exception(url + "dajie postDataByJson exception：", e); } finally { httpPost.releaseConnection(); long interval = System.currentTimeMillis() - start; logger.debug("{} 请求耗时：{} "+url+interval); } } /** * 通过get方法获取url资源的数据 * * @param url * 服务器地址 * @return 返回响应的文本，如果请求发生异常，抛出DajieHttpRequestException * @throws DajieHttpRequestException */ public String getData(String url) throws Exception { return getData(url, null); } public static void main(String[] args) throws Exception { HttpClientUtil hcu=new HttpClientUtil(); String r=hcu.getData("http://www.baidu.com"); System.out.println(r); } /** * 带header的get请求 * * @param url * 服务器地址 * @param headers * 添加的请求header信息 * @return 返回服务器响应的文本，出错抛出DajieHttpRequestException异常 * @throws DajieHttpRequestException */ public String getData(String url, Map<String, String> headers) { long start = System.currentTimeMillis(); logger.info("getData url:"+url); System.out.println("url:"+url); HttpGet httpGet = new HttpGet(url); if (headers != null && headers.size() > 0) { Set<Map.Entry<String, String>> set = headers.entrySet(); for (Iterator<Map.Entry<String, String>> it = set.iterator(); it .hasNext();) { Map.Entry<String, String> header = it.next(); if (header != null) { httpGet.setHeader(header.getKey(), header.getValue()); } } } String info=""; try { httpclient.getParams().setBooleanParameter(CoreConnectionPNames.STALE_CONNECTION_CHECK, true); //请求超时 httpclient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT,50000); //读取超时 httpclient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT,50000); //在提交请求之前 测试连接是否可用 //HttpClient.setHttpRequestRetryHandler(new DefaultHttpRequestRetryHandler(0, false)); HttpResponse response = httpclient.execute(httpGet); if(HttpStatus.SC_OK==response.getStatusLine().getStatusCode()){ HttpEntity entity = response.getEntity(); if(entity == null){ return null; } info = EntityUtils.toString(entity, "UTF-8"); }else{ info="请求目标服务器链接失败,http状态码:"+response.getStatusLine().getStatusCode(); } return info; }catch(ClientProtocolException e){ info="协议错误"; // LogUtil.getLogger().error("该异常通常是协议错误导致,比如构造HttpGet对象时传入的协议不对(将'http'写成'htp')或者服务器端返回的内容不符合HTTP协议要求等,堆栈信息如下", e); }catch(ParseException e){ info=e.getMessage(); // LogUtil.getLogger().error(e.getMessage(), e); }catch(IOException e){ info="网络异常"; // LogUtil.getLogger().error("该异常通常是网络原因引起的,如HTTP服务器未启动等,堆栈信息如下", e); }finally { httpGet.releaseConnection(); long interval = System.currentTimeMillis() - start; logger.debug("{} 请求耗时：{} "+url+interval); } return info; } /** * 对httpclient 做压缩处理和解压缩处理 * * @param httpclient */ public void initClient() { ((DefaultHttpClient)httpclient).addRequestInterceptor(new HttpRequestInterceptor() { @Override public void process(HttpRequest request, HttpContext context) { if (!request.containsHeader(HEADER_ACCEPT_ENCODING)) { request.addHeader(HEADER_ACCEPT_ENCODING, ENCODING_GZIP); } } }); ((DefaultHttpClient)httpclient).addResponseInterceptor(new HttpResponseInterceptor() { @Override public void process(HttpResponse response, HttpContext context) { final HttpEntity entity = response.getEntity(); if(entity == null){ return; } final Header encoding = entity.getContentEncoding(); if (encoding != null) { for (HeaderElement element : encoding.getElements()) { if (element.getName().equalsIgnoreCase(ENCODING_GZIP)) { response.setEntity(new GzipDecompressingEntity( response.getEntity())); break; } } } } }); //设置重试3次 httpclient.setHttpRequestRetryHandler(new DefaultHttpRequestRetryHandler(0, true)); httpclient.getParams().setBooleanParameter(CoreConnectionPNames.STALE_CONNECTION_CHECK, true); } /** * 关闭客户端 */ public void destroyClient(){ httpclient.getConnectionManager().shutdown(); } /** * post方式处理文件和图片上传 * * @param url * 服务器地址 * @param data * byte数组数据 * @param fileName * 文件名 * @return 返回服务器响应信息，否则抛出DajieHttpRequestException异常 * @throws DajieHttpRequestException */ /*public String postMultipartData(String url, byte[] data, String fileName) throws Exception { long start = System.currentTimeMillis(); HttpPost httpPost = new HttpPost(url); try { if (data != null && data.length > 0) { MultipartEntity reqEntity = new MultipartEntity(); ContentBody contentBody = new ByteArrayBody(data, fileName); reqEntity.addPart("file", contentBody); httpPost.setEntity(reqEntity); } HttpResponse response = httpclient.execute(httpPost); HttpEntity entity = response.getEntity(); String info = EntityUtils.toString(entity, "UTF-8"); return info; } catch (Exception e) { logger.debug("postMultipartData Exception url: {}", url, e); throw new Exception(url + "dajie postMultipartData exception：", e); } finally { httpPost.releaseConnection(); long interval = System.currentTimeMillis() - start; logger.debug("{} 请求耗时：{} ", url, interval); } }*/ /** * put 方式提交数据 * * @param url * ：服务器地址 * @param nameValuePairs * ：参数 * @return 返回 服务器返回的文本信息，报错会抛出异常 * @throws DajieHttpRequestException */ public String putData(String url, List<NameValuePair> nameValuePairs) throws Exception { long start = System.currentTimeMillis(); HttpPut httpPut = new HttpPut(url); try { if (nameValuePairs != null && nameValuePairs.size() > 0) { httpPut.setEntity(new UrlEncodedFormEntity(nameValuePairs, "UTF-8")); } HttpResponse response = httpclient.execute(httpPut); HttpEntity entity = response.getEntity(); if(entity == null){ return null; } String info = EntityUtils.toString(entity, "UTF-8"); return info; } catch (Exception e) { logger.debug("putData Exception url {} "+url); throw new Exception(url + "dajie putData exception：", e); } finally { httpPut.releaseConnection(); long interval = System.currentTimeMillis() - start; logger.debug("{} 请求耗时：{} "+url+interval); } } /** * delete 方式提交数据 * * @param url * 服务器地址 * @return 返回 服务器返回的文本信息，报错会抛出异常 * @throws DajieHttpRequestException */ public String deleteData(String url) throws Exception { return deleteData(url, null); } /** * delete 方式提交数据 * * @param url * 服务器地址 * @return 返回 服务器返回的文本信息，报错会抛出异常 */ public String deleteData(String url, Map<String, String> headers) throws Exception { long start = System.currentTimeMillis(); HttpDelete httpDelete = new HttpDelete(url); if (headers != null && headers.size() > 0) { Set<Map.Entry<String, String>> set = headers.entrySet(); for (Iterator<Map.Entry<String, String>> it = set.iterator(); it .hasNext();) { Map.Entry<String, String> header = it.next(); if (header != null) { httpDelete.setHeader(header.getKey(), header.getValue()); } } } try { HttpResponse response = httpclient.execute(httpDelete); HttpEntity entity = response.getEntity(); String info = EntityUtils.toString(entity, "UTF-8"); return info; } catch (Exception e) { logger.debug("putData Exception url {} "+url); throw new Exception(url + "dajie deleteDate exception：", e); } finally { httpDelete.releaseConnection(); long interval = System.currentTimeMillis() - start; logger.debug("{} 请求耗时：{} "+url+interval); } } /** * 下载媒体资源 * @param url * @return * @throws DajieHttpRequestException */ public byte[] getMultipartData(String url) throws Exception{ long start = System.currentTimeMillis(); HttpGet httpGet = new HttpGet(url); try { HttpResponse response = httpclient.execute(httpGet); byte[] result = EntityUtils.toByteArray(response.getEntity()); return result; }catch(Exception e){ logger.debug("putData Exception url {} "+url); throw new Exception(url+ "dajie getMultipartData exception：", e); }finally{ httpGet.releaseConnection(); long interval = System.currentTimeMillis() - start; logger.debug("{} 请求耗时：{} "+url+interval); } }} 0 0
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