[JAVA]使用HttpURLConnection进行POST方式提交
--sunfruit
用HttpURLConnection进行Post方式提交，下面给出一个例子
URL url = null;
HttpURLConnection httpurlconnection = null;
try
{
url = new URL("http://xxxx");
httpurlconnection = (HttpURLConnection) url.openConnection();
httpurlconnection.setDoOutput(true);
httpurlconnection.setRequestMethod("POST");
String username="username=02000001";
httpurlconnection.getOutputStream().write(username.getBytes());
httpurlconnection.getOutputStream().flush();
httpurlconnection.getOutputStream().close();
int code = httpurlconnection.getResponseCode();
System.out.println("code " + code);
}
catch(Exception e)
{
e.printStackTrace();
}
finally
{
if(httpurlconnection!=null)
httpurlconnection.disconnect();
}
其中HttpURLConnection中的addRequestProperty方法，并不是用来添加Parameter 的，而是用来设置请求的头信息，比如：
setRequestProperty("Content-type","text/html");
setRequestProperty("Connection", "close");
setRequestProperty("Content-Length",xxx);
当然如果不设置的话，可以走默认值，上面的例子中就没有进行相关设置，但是也可以正确执行
public class HttpConnectionPostTest {
public static void main(String[] args) throws Exception {
//设置代理，公司用的是代理上网
System.setProperty("proxySet", "true");
System.setProperty("proxyHost", "172.31.1.246");
System.setProperty("proxyPort", "8080");
//读取http://marc.info/?l=ant-dev&r=1&w=2的html输出
URL url = new URL("http://marc.info/");
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setDoOutput(true); // POST方式
con.setRequestMethod("POST");
OutputStream os = con.getOutputStream(); // 输出流，写数据
os.write("l=ant-dev&r=1&w=2".getBytes());
InputStream in = con.getInputStream(); // 读取结果
OutputStream out = new BufferedOutputStream(getOutputStream());
byte[] buf = new byte[2048];
int c = -1;
while ((c = in.read(buf)) != -1) {
out.write(buf, 0, c);
}
out.flush();
out.close();
in.close();
}
private static OutputStream getOutputStream() throws Exception {
return new FileOutputStream(new File("connection.html"));
}
}