封装一个类搞定90%安卓客户端与服务器端交互

http://blog.csdn.net/lk_blog/article/details/7706348

package com.tgb.lk.demo.util;import java.io.BufferedReader;import java.io.DataOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import java.net.URLEncoder;import java.util.ArrayList;import java.util.List;import java.util.Map;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.NameValuePair;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.HttpPost;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.message.BasicNameValuePair;import android.os.Environment;/** * NetTool:封装一个类搞定90%安卓客户端与服务器端交互 *  * @author 李坤 五期信息技术提高班 */public class NetTool {private static final int TIMEOUT = 10000;// 10秒/** * 传送文本,例如Json,xml等 */public static String sendTxt(String urlPath, String txt, String encoding)throws Exception {byte[] sendData = txt.getBytes();URL url = new URL(urlPath);HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setRequestMethod("POST");conn.setConnectTimeout(TIMEOUT);// 如果通过post提交数据，必须设置允许对外输出数据conn.setDoOutput(true);conn.setRequestProperty("Content-Type", "text/xml");conn.setRequestProperty("Charset", encoding);conn.setRequestProperty("Content-Length", String.valueOf(sendData.length));OutputStream outStream = conn.getOutputStream();outStream.write(sendData);outStream.flush();outStream.close();if (conn.getResponseCode() == 200) {// 获得服务器响应的数据BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), encoding));// 数据String retData = null;String responseData = "";while ((retData = in.readLine()) != null) {responseData += retData;}in.close();return responseData;}return "sendText error!";}/** * 上传文件 */public static String sendFile(String urlPath, String filePath,String newName) throws Exception {String end = "\r\n";String twoHyphens = "--";String boundary = "*****";URL url = new URL(urlPath);HttpURLConnection con = (HttpURLConnection) url.openConnection();/* 允许Input、Output，不使用Cache */con.setDoInput(true);con.setDoOutput(true);con.setUseCaches(false);/* 设置传送的method=POST */con.setRequestMethod("POST");/* setRequestProperty */con.setRequestProperty("Connection", "Keep-Alive");con.setRequestProperty("Charset", "UTF-8");con.setRequestProperty("Content-Type", "multipart/form-data;boundary="+ boundary);/* 设置DataOutputStream */DataOutputStream ds = new DataOutputStream(con.getOutputStream());ds.writeBytes(twoHyphens + boundary + end);ds.writeBytes("Content-Disposition: form-data; "+ "name=\"file1\";filename=\"" + newName + "\"" + end);ds.writeBytes(end);/* 取得文件的FileInputStream */FileInputStream fStream = new FileInputStream(filePath);/* 设置每次写入1024bytes */int bufferSize = 1024;byte[] buffer = new byte[bufferSize];int length = -1;/* 从文件读取数据至缓冲区 */while ((length = fStream.read(buffer)) != -1) {/* 将资料写入DataOutputStream中 */ds.write(buffer, 0, length);}ds.writeBytes(end);ds.writeBytes(twoHyphens + boundary + twoHyphens + end);/* close streams */fStream.close();ds.flush();/* 取得Response内容 */InputStream is = con.getInputStream();int ch;StringBuffer b = new StringBuffer();while ((ch = is.read()) != -1) {b.append((char) ch);}/* 关闭DataOutputStream */ds.close();return b.toString();}/** * 通过get方式提交参数给服务器 */public static String sendGetRequest(String urlPath,Map<String, String> params, String encoding) throws Exception {// 使用StringBuilder对象StringBuilder sb = new StringBuilder(urlPath);sb.append('?');// 迭代Mapfor (Map.Entry<String, String> entry : params.entrySet()) {sb.append(entry.getKey()).append('=').append(URLEncoder.encode(entry.getValue(), encoding)).append('&');}sb.deleteCharAt(sb.length() - 1);// 打开链接URL url = new URL(sb.toString());HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setRequestMethod("GET");conn.setRequestProperty("Content-Type", "text/xml");conn.setRequestProperty("Charset", encoding);conn.setConnectTimeout(TIMEOUT);// 如果请求响应码是200，则表示成功if (conn.getResponseCode() == 200) {// 获得服务器响应的数据BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), encoding));// 数据String retData = null;String responseData = "";while ((retData = in.readLine()) != null) {responseData += retData;}in.close();return responseData;}return "sendGetRequest error!";}/** * 通过Post方式提交参数给服务器,也可以用来传送json或xml文件 */public static String sendPostRequest(String urlPath,Map<String, String> params, String encoding) throws Exception {StringBuilder sb = new StringBuilder();// 如果参数不为空if (params != null && !params.isEmpty()) {for (Map.Entry<String, String> entry : params.entrySet()) {// Post方式提交参数的话，不能省略内容类型与长度sb.append(entry.getKey()).append('=').append(URLEncoder.encode(entry.getValue(), encoding)).append('&');}sb.deleteCharAt(sb.length() - 1);}// 得到实体的二进制数据byte[] entitydata = sb.toString().getBytes();URL url = new URL(urlPath);HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setRequestMethod("POST");conn.setConnectTimeout(TIMEOUT);// 如果通过post提交数据，必须设置允许对外输出数据conn.setDoOutput(true);// 这里只设置内容类型与内容长度的头字段conn.setRequestProperty("Content-Type","application/x-www-form-urlencoded");// conn.setRequestProperty("Content-Type", "text/xml");conn.setRequestProperty("Charset", encoding);conn.setRequestProperty("Content-Length", String.valueOf(entitydata.length));OutputStream outStream = conn.getOutputStream();// 把实体数据写入是输出流outStream.write(entitydata);// 内存中的数据刷入outStream.flush();outStream.close();// 如果请求响应码是200，则表示成功if (conn.getResponseCode() == 200) {// 获得服务器响应的数据BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), encoding));// 数据String retData = null;String responseData = "";while ((retData = in.readLine()) != null) {responseData += retData;}in.close();return responseData;}return "sendText error!";}/** * 在遇上HTTPS安全模式或者操作cookie的时候使用HTTPclient会方便很多 使用HTTPClient（开源项目）向服务器提交参数 */public static String sendHttpClientPost(String urlPath,Map<String, String> params, String encoding) throws Exception {// 需要把参数放到NameValuePairList<NameValuePair> paramPairs = new ArrayList<NameValuePair>();if (params != null && !params.isEmpty()) {for (Map.Entry<String, String> entry : params.entrySet()) {paramPairs.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));}}// 对请求参数进行编码，得到实体数据UrlEncodedFormEntity entitydata = new UrlEncodedFormEntity(paramPairs,encoding);// 构造一个请求路径HttpPost post = new HttpPost(urlPath);// 设置请求实体post.setEntity(entitydata);// 浏览器对象DefaultHttpClient client = new DefaultHttpClient();// 执行post请求HttpResponse response = client.execute(post);// 从状态行中获取状态码，判断响应码是否符合要求if (response.getStatusLine().getStatusCode() == 200) {HttpEntity entity = response.getEntity();InputStream inputStream = entity.getContent();InputStreamReader inputStreamReader = new InputStreamReader(inputStream, encoding);BufferedReader reader = new BufferedReader(inputStreamReader);// 读字符串用的。String s;String responseData = "";while (((s = reader.readLine()) != null)) {responseData += s;}reader.close();// 关闭输入流return responseData;}return "sendHttpClientPost error!";}/** * 根据URL直接读文件内容，前提是这个文件当中的内容是文本，函数的返回值就是文件当中的内容 */public static String readTxtFile(String urlStr, String encoding)throws Exception {StringBuffer sb = new StringBuffer();String line = null;BufferedReader buffer = null;try {// 创建一个URL对象URL url = new URL(urlStr);// 创建一个Http连接HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();// 使用IO流读取数据buffer = new BufferedReader(new InputStreamReader(urlConn.getInputStream(), encoding));while ((line = buffer.readLine()) != null) {sb.append(line);}} catch (Exception e) {throw e;} finally {try {buffer.close();} catch (Exception e) {e.printStackTrace();}}return sb.toString();}/** * 该函数返回整形 -1：代表下载文件出错 0：代表下载文件成功 1：代表文件已经存在 */public static int downloadFile(String urlStr, String path, String fileName)throws Exception {InputStream inputStream = null;try {inputStream = getInputStreamFromUrl(urlStr);File resultFile = write2SDFromInput(path, fileName, inputStream);if (resultFile == null) {return -1;}} catch (Exception e) {return -1;} finally {try {inputStream.close();} catch (Exception e) {throw e;}}return 0;}/** * 根据URL得到输入流 *  * @param urlStr * @return * @throws MalformedURLException * @throws IOException */public static InputStream getInputStreamFromUrl(String urlStr)throws MalformedURLException, IOException {URL url = new URL(urlStr);HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();InputStream inputStream = urlConn.getInputStream();return inputStream;}/** * 将一个InputStream里面的数据写入到SD卡中 */private static File write2SDFromInput(String directory, String fileName,InputStream input) {File file = null;String SDPATH = Environment.getExternalStorageDirectory().toString();FileOutputStream output = null;File dir = new File(SDPATH + directory);if (!dir.exists()) {dir.mkdir();}try {file = new File(dir + File.separator + fileName);file.createNewFile();output = new FileOutputStream(file);byte buffer[] = new byte[1024];while ((input.read(buffer)) != -1) {output.write(buffer);}output.flush();} catch (IOException e) {e.printStackTrace();} finally {try {output.close();} catch (IOException e) {e.printStackTrace();}}return file;}}