Java中以POST的方式发送和接收数据

URL url = null;
String inputLine = null;
HttpURLConnection httpurlconnection = null;
try {
url = new URL(urladdr);
httpurlconnection = (HttpURLConnection) url.openConnection();
httpurlconnection.setRequestProperty("content-type","text/html");
httpurlconnection.setRequestMethod("POST");
httpurlconnection.setDoOutput(true);
httpurlconnection.setDoInput(true);
httpurlconnection.setUseCaches(false);
httpurlconnection.getOutputStream().write(param.getBytes());
httpurlconnection.getOutputStream().flush();
httpurlconnection.getOutputStream().close();
int code = httpurlconnection.getResponseCode();
inputLine = readContents(httpurlconnection);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (httpurlconnection != null)
httpurlconnection.disconnect();
}
return inputLine;

private String readContents(HttpURLConnection httpurlconnection)
throws IOException {
BufferedReader in = null;
try {
in = new BufferedReader(new InputStreamReader(httpurlconnection
.getInputStream()));
StringBuffer temp = new StringBuffer();
String inputLine = in.readLine();
while (inputLine != null) {
temp.append(inputLine);
inputLine = in.readLine();
}
return temp.toString();

} catch (IOException e) {
e.printStackTrace();
} finally {
in.close();
}
return null;
}

response.setContentType("text/html");// 注意加上
java.io.BufferedReader reader = null;
try {
reader = request.getReader();// 获得字符流
StringBuffer content = new StringBuffer();
String line;
while ((line = reader.readLine()) != null) {
content.append(line + "\r\n");
}
result = content.toString();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
reader.close();
reader = null;
} catch (Exception e) {

}
}