tomcat注意要把这个配置

client端核心代码：

public static boolean post2(String url) {

File file = new File("D:/psu.jpg");

InputStream in = null;

String responseContent = null;

try {

in = new FileInputStream(file);

} catch (FileNotFoundException e1) {

e1.printStackTrace();

}

try {

if (url == null || url.trim().equals("")) {

throw new Exception("目标url地址无效");

}

URL url2 = new URL(url);

HttpURLConnection hc = (HttpURLConnection) url2.openConnection();

hc.setRequestMethod("POST");

System.setProperty("sun.net.client.defaultConnectTimeout",

String.valueOf(HttpTest.connectTimeOut));// (单位：毫秒)jdk1.4换成这个,连接超时

System.setProperty("sun.net.client.defaultReadTimeout",

String.valueOf(HttpTest.readTimeOut));

hc.setDoOutput(true);

OutputStream os = hc.getOutputStream();

// hc.getInputStream();

byte[] tempbytes = new byte[100];

int byteread = 0;

while ((byteread = in.read(tempbytes)) != -1) {

os.write(tempbytes, 0, byteread);

System.out.println(byteread);

}

os.flush();

os.close();

InputStream input = hc.getInputStream();                                           //严重注意，只有有了客户端的这部分的 读 的代码，才会有 写 的过程

BufferedReader rd = new BufferedReader(new InputStreamReader(input,

"GBK"));

String tempLine = rd.readLine();

StringBuffer tempStr = new StringBuffer();

String crlf = System.getProperty("line.separator");

while (tempLine != null) {

tempStr.append(tempLine);

tempStr.append(crlf);

tempLine = rd.readLine();

}

responseContent = tempStr.toString();

rd.close();

input.close();

hc.disconnect();

} catch (Exception e) {

e.printStackTrace();

return false;

}

try {

in.close();

} catch (IOException e) {

e.printStackTrace();

}

return true;

}

server端核心代码

protected void doPost(HttpServletRequest request,

HttpServletResponse response) throws ServletException, IOException {

String fileName = "D:/copy.jpg";

RandomAccessFile file = null;

ServletInputStream sis = null;

try {

file = new RandomAccessFile(fileName, "rw");

sis = request.getInputStream();

byte[] buf = new byte[1024];

int len = sis.read(buf);

while (len != -1) {

System.out.println(len);

file.write(buf, 0, len);

len = sis.read(buf);

}

} catch (Exception e) {

e.printStackTrace();

} finally {

if (file != null)

file.close();

}

if (sis != null)

sis.close();

}