http协议上传文件一般最大是2M，比较适合上传小于两M的文件
[代码] [Java]代码
001import java.io.File;
002import java.io.FileInputStream;
003import java.io.FileNotFoundException;
004import java.io.InputStream;
005
006/**
007* 上传的文件
008*/
009public class FormFile {
010/** 上传文件的数据 */
011private byte[] data;
012private InputStream inStream;
013private File file;
014/** 文件名称 */
015private String filname;
016/** 请求参数名称*/
017private String parameterName;
018/** 内容类型 */
019private String contentType = "application/octet-stream";
020/**
021*
022* @param filname 文件名称
023* @param data 上传的文件数据
024* @param parameterName 参数
025* @param contentType 内容类型
026*/
027public FormFile(String filname, byte[] data, String parameterName, String contentType) {
028this.data = data;
029this.filname = filname;
030this.parameterName = parameterName;
031if(contentType!=null) this.contentType = contentType;
032}
033/**
034*
035* @param filname 文件名
036* @param file 上传的文件
037* @param parameterName 参数
038* @param contentType 内容内容类型
039*/
040public FormFile(String filname, File file, String parameterName, String contentType) {
041this.filname = filname;
042this.parameterName = parameterName;
043this.file = file;
044try {
045this.inStream = new FileInputStream(file);
046} catch (FileNotFoundException e) {
047e.printStackTrace();
048}
049if(contentType!=null) this.contentType = contentType;
050}
051
052public File getFile() {
053return file;
054}
055
056public InputStream getInStream() {
057return inStream;
058}
059
060public byte[] getData() {
061return data;
062}
063
064public String getFilname() {
065return filname;
066}
067
068public void setFilname(String filname) {
069this.filname = filname;
070}
071
072public String getParameterName() {
073return parameterName;
074}
075
076public void setParameterName(String parameterName) {
077this.parameterName = parameterName;
078}
079
080public String getContentType() {
081return contentType;
082}
083
084public void setContentType(String contentType) {
085this.contentType = contentType;
086}
087
088}
089
090/**
091* 直接通过HTTP协议提交数据到服务器,实现如下面表单提交功能:
092* <FORM METHOD=POST ACTION="http://192.168.0.200:8080/ssi/fileload/test.do" enctype="multipart/form-data">
093<INPUT TYPE="text" NAME="name">
094<INPUT TYPE="text" NAME="id">
095<input type="file" name="imagefile"/>
096<input type="file" name="zip"/>
097</FORM>
098* @param path 上传路径(注：避免使用localhost或127.0.0.1这样的路径测试，因为它会指向手机模拟器，你可以使用http://www.xxx.cn或http://192.168.1.10:8080这样的路径测试)
099* @param params 请求参数 key为参数名,value为参数值
100* @param file 上传文件
101*/
102public static boolean post(String path, Map<String, String> params, FormFile[] files) throws Exception{
103final String BOUNDARY = "---------------------------7da2137580612"; //数据分隔线
104final String endline = "--" + BOUNDARY + "--\r\n";//数据结束标志
105
106int fileDataLength = 0;
107for(FormFile uploadFile : files){//得到文件类型数据的总长度
108StringBuilder fileExplain = new StringBuilder();
109fileExplain.append("--");
110fileExplain.append(BOUNDARY);
111fileExplain.append("\r\n");
112fileExplain.append("Content-Disposition: form-data;name=\""+ uploadFile.getParameterName()+"\";filename=\""+ uploadFile.getFilname() + "\"\r\n");
113fileExplain.append("Content-Type: "+ uploadFile.getContentType()+"\r\n\r\n");
114fileExplain.append("\r\n");
115fileDataLength += fileExplain.length();
116if(uploadFile.getInStream()!=null){
117fileDataLength += uploadFile.getFile().length();
118}else{
119fileDataLength += uploadFile.getData().length;
120}
121}
122StringBuilder textEntity = new StringBuilder();
123for (Map.Entry<String, String> entry : params.entrySet()) {//构造文本类型参数的实体数据
124textEntity.append("--");
125textEntity.append(BOUNDARY);
126textEntity.append("\r\n");
127textEntity.append("Content-Disposition: form-data; name=\""+ entry.getKey() + "\"\r\n\r\n");
128textEntity.append(entry.getValue());
129textEntity.append("\r\n");
130}
131//计算传输给服务器的实体数据总长度
132int dataLength = textEntity.toString().getBytes().length + fileDataLength + endline.getBytes().length;
133
134URL url = new URL(path);
135int port = url.getPort()==-1 ? 80 : url.getPort();
136Socket socket = new Socket(InetAddress.getByName(url.getHost()), port);
137OutputStream outStream = socket.getOutputStream();
138//下面完成HTTP请求头的发送
139String requestmethod = "POST "+ url.getPath()+" HTTP/1.1\r\n";
140outStream.write(requestmethod.getBytes());
141String 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";
142outStream.write(accept.getBytes());
143String language = "Accept-Language: zh-CN\r\n";
144outStream.write(language.getBytes());
145String contenttype = "Content-Type: multipart/form-data; boundary="+ BOUNDARY+ "\r\n";
146outStream.write(contenttype.getBytes());
147String contentlength = "Content-Length: "+ dataLength + "\r\n";
148outStream.write(contentlength.getBytes());
149String alive = "Connection: Keep-Alive\r\n";
150outStream.write(alive.getBytes());
151String host = "Host: "+ url.getHost() +":"+ port +"\r\n";
152outStream.write(host.getBytes());
153//写完HTTP请求头后根据HTTP协议再写一个回车换行
154outStream.write("\r\n".getBytes());
155//把所有文本类型的实体数据发送出来
156outStream.write(textEntity.toString().getBytes());
157//把所有文件类型的实体数据发送出来
158for(FormFile uploadFile : files){
159StringBuilder fileEntity = new StringBuilder();
160fileEntity.append("--");
161fileEntity.append(BOUNDARY);
162fileEntity.append("\r\n");
163fileEntity.append("Content-Disposition: form-data;name=\""+ uploadFile.getParameterName()+"\";filename=\""+ uploadFile.getFilname() + "\"\r\n");
164fileEntity.append("Content-Type: "+ uploadFile.getContentType()+"\r\n\r\n");
165outStream.write(fileEntity.toString().getBytes());
166if(uploadFile.getInStream()!=null){
167byte[] buffer = new byte[1024];
168int len = 0;
169while((len = uploadFile.getInStream().read(buffer, 0,1024))!=-1){
170outStream.write(buffer, 0, len);
171}
172uploadFile.getInStream().close();
173}else{
174outStream.write(uploadFile.getData(), 0, uploadFile.getData().length);
175}
176outStream.write("\r\n".getBytes());
177}
178//下面发送数据结束标志，表示数据已经结束
179outStream.write(endline.getBytes());
180
181BufferedReader reader = new BufferedReader(newInputStreamReader(socket.getInputStream()));
182if(reader.readLine().indexOf("200")==-1){//读取web服务器返回的数据，判断请求码是否为200，如果不是200，代表请求失败
183return false;
184}
185outStream.flush();
186outStream.close();
187reader.close();
188socket.close();
189return true;
190}
191
192/**
193* 提交数据到服务器
194* @param path 上传路径(注：避免使用localhost或127.0.0.1这样的路径测试，因为它会指向手机模拟器，你可以使用http://www.xxx.cn或http://192.168.1.10:8080这样的路径测试)
195* @param params 请求参数 key为参数名,value为参数值
196* @param file 上传文件
197*/
198public static boolean post(String path, Map<String, String> params, FormFile file) throws Exception{
199return post(path, params, new FormFile[]{file});
200}