Http封装请求工具类

import java.io.BufferedReader;import java.io.File;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.io.PrintWriter;import java.io.UnsupportedEncodingException;import java.net.HttpURLConnection;import java.net.URL;import java.net.URLConnection;import java.util.Map;import java.util.Set;import org.apache.commons.io.IOUtils;import org.apache.commons.lang.StringUtils;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.HttpClient;import org.apache.http.client.methods.HttpPost;import org.apache.http.entity.mime.MultipartEntity;import org.apache.http.entity.mime.content.FileBody;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.log4j.Logger;public class HttpUtil {private static Logger logger = Logger.getLogger(HttpUtil.class);private static String ENCODING_UTF_8 = "UTF-8";/** * <p class="detail"> * 功能：发送post请求 * </p> * @param hostUrl请求链接，不带参数 * @param data请求参数，不带？，多个参数用&分隔 * @return */public static String post(String hostUrl, String data){StringBuffer Result = new StringBuffer();int code = 0;HttpURLConnection httpConn = null;try{URL url = new URL(hostUrl);httpConn = (HttpURLConnection) url.openConnection();httpConn.setConnectTimeout(4000);httpConn.setReadTimeout(2000);httpConn.setDoOutput(true);httpConn.setRequestMethod("POST");httpConn.addRequestProperty("Content-Type", "application/x-www-form-urlencoded");httpConn.setRequestProperty("User-Agent", "127.0.0.1");OutputStreamWriter osw = new OutputStreamWriter(httpConn.getOutputStream(), "utf-8");  osw.write(data);  osw.flush();  osw.close(); code = httpConn.getResponseCode();if(code==200){BufferedReader reader = new BufferedReader(new InputStreamReader(httpConn.getInputStream(),"UTF-8"));String line = null;while((line=reader.readLine())!=null){Result.append( line +"\n" );}reader.close();}else{Result.append("Error:"+code);}    }catch(Exception e){    e.printStackTrace();    }finally{    if(httpConn!=null){    httpConn.disconnect();    }    }return Result.toString();}/** * 向指定URL发送GET方法的请求 *  * @param url 发送请求的URL * @param parameterMap 请求参数 * @return 所代表远程资源的响应结果 */public static String sendGet(String urlStr, Map<String, Object> parameterMap) {String result = "";String encoding = "";InputStream is = null;BufferedReader in = null;try {String params = assembleUrl(parameterMap);// 建立连接URL realUrl = new URL(urlStr + (StringUtils.isBlank(params)?"":params));logger.info(realUrl.toString());// 打开和URL之间的连接URLConnection connection = realUrl.openConnection();// 设置通用的请求属性connection.setRequestProperty("accept", "*/*");connection.setRequestProperty("connection", "Keep-Alive");connection.setRequestProperty("user-agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");// 建立实际的连接connection.connect();is = connection.getInputStream();encoding = connection.getContentEncoding();result = IOUtils.toString(is, encoding);} catch (Exception e) {System.out.println("发送GET请求出现异常！" + e);e.printStackTrace();} finally {try {if (in != null) {in.close();}} catch (Exception e2) {e2.printStackTrace();}}return result;}/** * <p class="detail"> * 功能：以表单形式发送POST请求 * </p> * @param urlStr 不带参数的url * @param parameterMap 参数列表 * @return */public static String sendPostWithForm(String urlStr, Map<String, Object> parameterMap) {BufferedReader responseReader = null;try {String params = assembleUrl(parameterMap);// 建立连接URL url = new URL(urlStr + (StringUtils.isBlank(params)?"":params));HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();// //设置连接属性httpConn.setDoOutput(true);// 使用 URL 连接进行输出httpConn.setDoInput(true);// 使用 URL 连接进行输入httpConn.setUseCaches(false);// 忽略缓存httpConn.setRequestMethod("POST");// 设置URL请求方法// 设置请求属性// 获得数据字节数据，请求数据流的编码，必须和下面服务器端处理请求流的编码一致httpConn.setRequestProperty("Content-Type", "application/octet-stream");httpConn.setRequestProperty("Connection", "Keep-Alive");// 维持长连接httpConn.setRequestProperty("Charset", "UTF-8");// 获得响应状态int responseCode = httpConn.getResponseCode();if (HttpURLConnection.HTTP_OK == responseCode) {// 连接成功// 当正确响应时处理数据StringBuffer buffer = new StringBuffer();String readLine;// 处理响应流，必须与服务器响应流输出的编码一致responseReader = new BufferedReader(new InputStreamReader(httpConn.getInputStream(), ENCODING_UTF_8));while ((readLine = responseReader.readLine()) != null) {buffer.append(readLine).append("\n");}responseReader.close();return buffer.toString();}} catch (Exception ex) {ex.printStackTrace();} finally {try {if(responseReader!=null)responseReader.close();} catch (IOException e) {e.printStackTrace();}}return null;}public static String sendPostWithRaw(String urlStr, String data) {BufferedReader responseReader = null;PrintWriter out = null;try {// 建立连接URL url = new URL(urlStr);HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();// //设置连接属性httpConn.setDoOutput(true);// 使用 URL 连接进行输出httpConn.setDoInput(true);// 使用 URL 连接进行输入httpConn.setUseCaches(false);// 忽略缓存httpConn.setRequestMethod("POST");// 设置URL请求方法// 设置请求属性// 获得数据字节数据，请求数据流的编码，必须和下面服务器端处理请求流的编码一致httpConn.setRequestProperty("Content-Type", "text/plain");httpConn.setRequestProperty("Connection", "Keep-Alive");// 维持长连接httpConn.setRequestProperty("Charset", "UTF-8");// 获取URLConnection对象对应的输出流            out = new PrintWriter(httpConn.getOutputStream());            // 发送请求参数            out.write(data);            // flush输出流的缓冲            out.flush();// 获得响应状态int responseCode = httpConn.getResponseCode();if (HttpURLConnection.HTTP_OK == responseCode) {// 连接成功// 当正确响应时处理数据StringBuffer buffer = new StringBuffer();String readLine;// 处理响应流，必须与服务器响应流输出的编码一致responseReader = new BufferedReader(new InputStreamReader(httpConn.getInputStream(), ENCODING_UTF_8));while ((readLine = responseReader.readLine()) != null) {buffer.append(readLine).append("\n");}return buffer.toString();}} catch (Exception ex) {ex.printStackTrace();} finally {try {if(out!=null)out.close();if(responseReader!=null)responseReader.close();} catch (IOException e) {e.printStackTrace();}}return null;}/** * <p class="detail"> * 功能：发送post请求，可上传文件 * </p> * @param urlStr 不带参数的url * @param parameterMap 参数列表 * @param formName上传文件的表单名，如<input type="file" name="img"/> * @param filePath文件的绝对路径 * @return */public static String sendPostWithFile(String urlStr, Map<String, Object> parameterMap, String formName, String filePath) {String paramsUrl = assembleUrl(parameterMap);HttpClient httpClient = new DefaultHttpClient();// 实例化http客户端HttpPost postMan = new HttpPost(urlStr + (StringUtils.isBlank(paramsUrl)?"":paramsUrl));// 实例化post提交方式postMan.addHeader("Charset", "UTF-8");try {MultipartEntity params = new MultipartEntity();// 实例化参数对象if(!StringUtils.isBlank(formName) && !StringUtils.isBlank(filePath)){File file = new File(filePath);// 设置上传文件if(file.exists()){//商品图片文件存在FileBody fileBody = new FileBody(file);params.addPart(formName, fileBody);// 添加文件参数postMan.setEntity(params);// 将参数加入post请求体中}}HttpResponse resp = httpClient.execute(postMan);//执行请求HttpEntity entity = resp.getEntity();// 解析返回请求结果InputStream is = entity.getContent();BufferedReader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));StringBuffer buffer = new StringBuffer();String temp;while ((temp = reader.readLine()) != null) {buffer.append(temp).append("\n");}return buffer.toString();} catch (UnsupportedEncodingException e) {e.printStackTrace();} catch (ClientProtocolException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} catch (IllegalStateException e) {e.printStackTrace();}return null;}/** * <p class="detail"> * 功能：组装请求链接 * </p> * @param urlStr 不带参数的url * @param parameterMap 请求参数 * @return */public static String assembleUrl(Map<String, Object> parameterMap) {if(parameterMap == null || parameterMap.size() == 0) return "";StringBuilder urlBuilder = new StringBuilder();Set<String> keySet = parameterMap.keySet();for (String key : keySet) {if (urlBuilder.length() != 0)urlBuilder.append("&");urlBuilder.append(key);urlBuilder.append("=");urlBuilder.append(parameterMap.get(key));}return urlBuilder.toString();}}