http請求工具

 

代碼  1
 import java.io.ByteArrayOutputStream;
 import java.io.DataOutputStream;
 import java.io.InputStream;
 import java.net.HttpURLConnection;
 import java.net.URL;
 import java.net.URLEncoder;
 import java.util.Map;
 import android.util.Log;

 public class NetUtil {

     private static final String TAG = "NetUtil";
     private static final int RESPONSE_OK = 200;

     public static InputStream sendPostRequest(String urlPath,
             Map<String, String> params, String encoding) throws Exception {
         // String param = "method=save&id=24&name="
         // + URLEncoder.encode("大圓", "UTF-8");
         StringBuilder sb = new StringBuilder();
         for (Map.Entry<String, String> entry : params.entrySet()) {
             sb.append(entry.getKey()).append("=")
                     .append(URLEncoder.encode(entry.getValue(), encoding))
                     .append("&");
         }
         sb.deleteCharAt(sb.lastIndexOf("&"));
         byte[] data = sb.toString().getBytes();
         URL url = new URL(urlPath);
         HttpURLConnection conn = (HttpURLConnection) url.openConnection();
         conn.setRequestMethod("POST");
         conn.setReadTimeout(5 * 1000);
         conn.setDoOutput(true); // 發送POST請求， 必須設置容許輸出
         conn.setUseCaches(false);
         conn.setRequestProperty("Connection", "Keep-Alive"); // 維持長連接
         conn.setRequestProperty("Charset", "UTF-8");
         // 設置輸入參數的大小，把參數轉化爲字節數組
         conn.setRequestProperty("Content-Length", String.valueOf(data.length));
         // 設置數據類型
         conn.setRequestProperty("Content-Type",
                 "application/x-www-form-urlencoded");

         DataOutputStream outStream = new DataOutputStream(
                 conn.getOutputStream());
         outStream.write(data);
         outStream.flush();
         outStream.close();
         if (conn.getResponseCode() == RESPONSE_OK) {
             return conn.getInputStream();
         }
         return null;
     }

     /*
      * 獲得http返回的輸入流，而且轉化成String
      */
     public static String getTextContent(String urlPath, String encoding)
             throws Exception {
         URL url = new URL(urlPath);
         HttpURLConnection conn = (HttpURLConnection) url.openConnection();
         conn.setRequestMethod("GET");
         conn.setReadTimeout(5 * 1000);
         if (conn.getResponseCode() == RESPONSE_OK) {
             InputStream inStream = conn.getInputStream();
             byte[] data = readStream(inStream);
             System.out.println(new String(data, encoding));
             return new String(data, encoding);
         }
         return null;
     }

     // 讀取數據
     public static byte[] readStream(InputStream inStream) throws Exception {
         ByteArrayOutputStream outStream = new ByteArrayOutputStream();
         byte[] buffer = new byte[2048];
         int length = -1;
         while ((length = (inStream.read(buffer))) != -1) {
             outStream.write(buffer, 0, length);
         }
         outStream.close();
         return outStream.toByteArray();
     }

     // 直接返回http獲得的輸入流
     public static InputStream getStreamContent(String urlPath, String encoding)
             throws Exception {
         InputStream inStream = null;
         URL url = new URL(urlPath);
         HttpURLConnection conn = (HttpURLConnection) url.openConnection();
         conn.setRequestMethod("GET");
         conn.setReadTimeout(5 * 1000);
         if (conn.getResponseCode() == RESPONSE_OK) {
             inStream = conn.getInputStream();
         }
         return inStream;
     }

     public static void print(String tag, String msg) {
         Log.d(tag, msg);
     }
 }

 

代碼 1 public class FormFile {
     // 上傳文件的數據
     private byte[] data;

     private InputStream inStream;

     // 文件名稱
     private String filename;
     // 表單名稱
     private String formname;
     // 內容類型
     private String contentType = "application/octet-stream";

     public FormFile(String filename, byte[] data, String formname,
             String contentType) {
         this.data = data;
         this.filename = filename;
         this.formname = formname;
         if (contentType != null) {
             this.contentType = contentType;
         }
     }

     public FormFile(String filename, InputStream inStream, String formname,
             String contentType) {
         this.filename = filename;
         this.formname = formname;
         this.inStream = inStream;
         if (contentType != null) {
             this.contentType = contentType;
         }
     }

     public byte[] getData() {
         return data;
     }

     public void setData(byte[] data) {
         this.data = data;
     }

     public InputStream getInStream() {
         return inStream;
     }

     public void setInStream(InputStream inStream) {
         this.inStream = inStream;
     }

     public String getFilename() {
         return filename;
     }

     public void setFilename(String filename) {
         this.filename = filename;
     }

     public String getFormname() {
         return formname;
     }

     public void setFormname(String formname) {
         this.formname = formname;
     }

     public String getContentType() {
         return contentType;
     }

     public void setContentType(String contentType) {
         this.contentType = contentType;
     }
 }
 代碼  1 public class HttpUploadRequester {
     /**
      * 直接經過HTTP協議提交數據到服務器,實現以下面表單提交功能: <FORM METHOD=POST
      * ACTION="http://192.168.0.200:8080/ssi/fileload/test.do"
      * enctype="multipart/form-data"> <INPUT TYPE="text" NAME="name"> <INPUT
      * TYPE="text" NAME="id"> <input type="file" name="p_w_picpathfile"/> <input
      * type="file" name="zip"/> </FORM>
      *
      * @param actionUrl
      *            上傳路徑(注：避免使用localhost或127.0.0.1這樣的路徑測試，由於它會指向手機模擬器，
      *            你能夠使用http://192.168.1.10:8080這樣的路徑測試)
      * @param params
      *            請求參數 key爲參數名,value爲參數值
      * @param file
      *            上傳文件
      */
     // http協議中分割符，隨便定義
     private static final String HTTP_BOUNDARY = "---------9dx5a2d578c2";
     private static final String MULTIPART_FORM_DATA = "multipart/form-data";
     private static final String LINE_ENTER = "\r\n"; // 換行 回車
     private static final int RESPONSE_OK = 200;

     public static String post(String urlPath, Map<String, String> params,
             FormFile[] formFiles) {
         try {
             URL url = new URL(urlPath);
             HttpURLConnection conn = (HttpURLConnection) url.openConnection();
             conn.setRequestMethod("POST");
             conn.setReadTimeout(5 * 1000);
             conn.setDoOutput(true); // 發送POST請求， 必須設置容許輸出
             conn.setUseCaches(false);
             conn.setRequestProperty("Connection", "Keep-Alive"); // 維持長連接
             conn.setRequestProperty("Charset", "UTF-8");
             conn.setRequestProperty("Content-Type", MULTIPART_FORM_DATA
                     + "; boundary=" + HTTP_BOUNDARY);

             StringBuilder formItemData = new StringBuilder();
             // 構建 表單字段內容
             for (Map.Entry<String, String> entry : params.entrySet()) {
                 formItemData.append("--");
                 formItemData.append(HTTP_BOUNDARY);
                 formItemData.append(LINE_ENTER);
                 formItemData.append("Content-Disposition: form-data; name=\""
                         + entry.getKey() + "\"\r\n\r\n");
                 formItemData.append(entry.getValue());
                 formItemData.append(LINE_ENTER);
             }
             DataOutputStream outStream = new DataOutputStream(
                     conn.getOutputStream());
             // 發送表單字段內容到服務器
             outStream.write(formItemData.toString().getBytes());

             // 發送上傳文件數據
             for (FormFile fileData : formFiles) {
                 StringBuilder fileSplit = new StringBuilder();
                 fileSplit.append("--");
                 fileSplit.append(HTTP_BOUNDARY);
                 fileSplit.append(LINE_ENTER);
                 fileSplit.append("Content-Disposition: form-data;name=\""
                         + fileData.getFormname() + "\";filename=\""
                         + fileData.getFilename() + "\"\r\n");
                 fileSplit.append("Content-Type:" + fileData.getContentType()
                         + LINE_ENTER + LINE_ENTER);
                 outStream.write(fileSplit.toString().getBytes());

                 if (fileData.getInStream() != null) {
                     byte[] buffer = new byte[1024];
                     int length = 0;
                     while ((length = fileData.getInStream().read()) != -1) {
                         outStream.write(buffer, 0, length);
                     }
                     fileData.getInStream().close();
                 } else {
                     outStream.write(fileData.getData(), 0,
                             fileData.getData().length);
                 }
                 outStream.write(LINE_ENTER.getBytes());
             }
             // 數據結束標誌
             byte[] endData = ("--" + HTTP_BOUNDARY + "--" + LINE_ENTER)
                     .getBytes();
             outStream.write(endData);
             outStream.flush();
             outStream.close();
             int responseCode = conn.getResponseCode();
             if (responseCode != RESPONSE_OK) {
                 throw new RuntimeException("請求url失敗");
             }
             InputStream is = conn.getInputStream();
             int ch;
             StringBuilder b = new StringBuilder();
             while ((ch = is.read()) != -1) {
                 b.append((char) ch);
             }
             Log.i("HttpPost", b.toString());
             conn.disconnect();
             return b.toString();
         } catch (Exception e) {
             throw new RuntimeException();
         }
     }

     // 上傳單個文件
     public static String post(String urlPath, Map<String, String> params,
             FormFile formFiles) {
         return post(urlPath, params, new FormFile[] { formFiles });
     }
 }
 代碼 1   // 以表單方式發送請求

          public static void sendDataToServerByForm() throws Exception {

                    Map<String, String> params = new HashMap<String, String>();

                    params.put("method", "sendDataByForm");

                    params.put("strData", "字符串數據");

                    // 獲取SDCard中的good.jpg

                    File file = new File(Environment.getExternalStorageDirectory(),

                                      "app_Goog_Android_w.png");

                    FormFile fileData = new FormFile("app_Goog_Android_w.png", new FileInputStream(file),

                                      "fileData", "application/octet-stream");

                    HttpUploadRequester.post(

                                      "http://192.168.0.2:8080/AndroidWebServer/server.do", params,

                                      fileData);

          }