http協議上傳文件一般最大是2M,比較適合上傳小於兩M的文件
下面是封裝的一個文件類:
- import java.io.File;
- import java.io.FileInputStream;
- import java.io.FileNotFoundException;
- import java.io.InputStream;
-
- /**
- * 上傳的文件
- */
- public class FormFile {
- /* 上傳文件的數據 */
- private byte[] data;
- private InputStream inStream;
- private File file;
- /* 文件名稱 */
- private String filname;
- /* 請求參數名稱*/
- private String parameterName;
- /* 內容類型 */
- private String contentType = "application/octet-stream";
- /**
- *
- * @param filname 文件名稱
- * @param data 上傳的文件數據
- * @param parameterName 參數
- * @param contentType 內容類型
- */
- public FormFile(String filname, byte[] data, String parameterName, String contentType) {
- this.data = data;
- this.filname = filname;
- this.parameterName = parameterName;
- if(contentType!=null) this.contentType = contentType;
- }
- /**
- *
- * @param filname 文件名
- * @param file 上傳的文件
- * @param parameterName 參數
- * @param contentType 內容內容類型
- */
- public FormFile(String filname, File file, String parameterName, String contentType) {
- this.filname = filname;
- this.parameterName = parameterName;
- this.file = file;
- try {
- this.inStream = new FileInputStream(file);
- } catch (FileNotFoundException e) {
- e.printStackTrace();
- }
- if(contentType!=null) this.contentType = contentType;
- }
-
- public File getFile() {
- return file;
- }
-
- public InputStream getInStream() {
- return inStream;
- }
-
- public byte[] getData() {
- return data;
- }
-
- public String getFilname() {
- return filname;
- }
-
- public void setFilname(String filname) {
- this.filname = filname;
- }
-
- public String getParameterName() {
- return parameterName;
- }
-
- public void setParameterName(String parameterName) {
- this.parameterName = parameterName;
- }
-
- public String getContentType() {
- return contentType;
- }
-
- public void setContentType(String contentType) {
- this.contentType = contentType;
- }
-
- }
下面的方法封裝的http協議上傳數據:
- /**
- * 直接通過HTTP協議提交數據到服務器,實現如下面表單提交功能:
- * <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="imagefile"/>
- <input type="file" name="zip"/>
- </FORM>
- * @param path 上傳路徑(注:避免使用localhost或127.0.0.1這樣的路徑測試,因為它會指向手機模擬器,你可以使用http://www.xxx.cn或http://192.168.1.10:8080這樣的路徑測試)
- * @param params 請求參數 key為參數名,value為參數值
- * @param file 上傳文件
- */
- public static boolean post(String path, Map<String, String> params, FormFile[] files) throws Exception{
- final String BOUNDARY = "---------------------------7da2137580612"; //數據分隔線
- final String endline = "--" + BOUNDARY + "--\r\n";//數據結束標志
-
- int fileDataLength = 0;
- for(FormFile uploadFile : files){//得到文件類型數據的總長度
- StringBuilder fileExplain = new StringBuilder();
- fileExplain.append("--");
- fileExplain.append(BOUNDARY);
- fileExplain.append("\r\n");
- fileExplain.append("Content-Disposition: form-data;name=\""+ uploadFile.getParameterName()+"\";filename=\""+ uploadFile.getFilname() + "\"\r\n");
- fileExplain.append("Content-Type: "+ uploadFile.getContentType()+"\r\n\r\n");
- fileExplain.append("\r\n");
- fileDataLength += fileExplain.length();
- if(uploadFile.getInStream()!=null){
- fileDataLength += uploadFile.getFile().length();
- }else{
- fileDataLength += uploadFile.getData().length;
- }
- }
- StringBuilder textEntity = new StringBuilder();
- for (Map.Entry<String, String> entry : params.entrySet()) {//構造文本類型參數的實體數據
- textEntity.append("--");
- textEntity.append(BOUNDARY);
- textEntity.append("\r\n");
- textEntity.append("Content-Disposition: form-data; name=\""+ entry.getKey() + "\"\r\n\r\n");
- textEntity.append(entry.getValue());
- textEntity.append("\r\n");
- }
- //計算傳輸給服務器的實體數據總長度
- int dataLength = textEntity.toString().getBytes().length + fileDataLength + endline.getBytes().length;
-
- URL url = new URL(path);
- int port = url.getPort()==-1 ? 80 : url.getPort();
- Socket socket = new Socket(InetAddress.getByName(url.getHost()), port);
- OutputStream outStream = socket.getOutputStream();
- //下面完成HTTP請求頭的發送
- String requestmethod = "POST "+ url.getPath()+" HTTP/1.1\r\n";
- outStream.write(requestmethod.getBytes());
- String accept = "Accept: image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*\r\n";
- outStream.write(accept.getBytes());
- String language = "Accept-Language: zh-CN\r\n";
- outStream.write(language.getBytes());
- String contenttype = "Content-Type: multipart/form-data; boundary="+ BOUNDARY+ "\r\n";
- outStream.write(contenttype.getBytes());
- String contentlength = "Content-Length: "+ dataLength + "\r\n";
- outStream.write(contentlength.getBytes());
- String alive = "Connection: Keep-Alive\r\n";
- outStream.write(alive.getBytes());
- String host = "Host: "+ url.getHost() +":"+ port +"\r\n";
- outStream.write(host.getBytes());
- //寫完HTTP請求頭後根據HTTP協議再寫一個回車換行
- outStream.write("\r\n".getBytes());
- //把所有文本類型的實體數據發送出來
- outStream.write(textEntity.toString().getBytes());
- //把所有文件類型的實體數據發送出來
- for(FormFile uploadFile : files){
- StringBuilder fileEntity = new StringBuilder();
- fileEntity.append("--");
- fileEntity.append(BOUNDARY);
- fileEntity.append("\r\n");
- fileEntity.append("Content-Disposition: form-data;name=\""+ uploadFile.getParameterName()+"\";filename=\""+ uploadFile.getFilname() + "\"\r\n");
- fileEntity.append("Content-Type: "+ uploadFile.getContentType()+"\r\n\r\n");
- outStream.write(fileEntity.toString().getBytes());
- if(uploadFile.getInStream()!=null){
- byte[] buffer = new byte[1024];
- int len = 0;
- while((len = uploadFile.getInStream().read(buffer, 0, 1024))!=-1){
- outStream.write(buffer, 0, len);
- }
- uploadFile.getInStream().close();
- }else{
- outStream.write(uploadFile.getData(), 0, uploadFile.getData().length);
- }
- outStream.write("\r\n".getBytes());
- }
- //下面發送數據結束標志,表示數據已經結束
- outStream.write(endline.getBytes());
-
- BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
- if(reader.readLine().indexOf("200")==-1){//讀取web服務器返回的數據,判斷請求碼是否為200,如果不是200,代表請求失敗
- return false;
- }
- outStream.flush();
- outStream.close();
- reader.close();
- socket.close();
- return true;
- }
-
- /**
- * 提交數據到服務器
- * @param path 上傳路徑(注:避免使用localhost或127.0.0.1這樣的路徑測試,因為它會指向手機模擬器,你可以使用http://www.xxx.cn或http://192.168.1.10:8080這樣的路徑測試)
- * @param params 請求參數 key為參數名,value為參數值
- * @param file 上傳文件
- */
- public static boolean post(String path, Map<String, String> params, FormFile file) throws Exception{
- return post(path, params, new FormFile[]{file});
- }