java原生http请求post,需要的朋友可以参考下。

import java.io.BufferedReader;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.net.HttpURLConnection;

import java.net.URL;

public class HttpUtils {

public static String sendPost(String uri, String charset) {

String result = null;

InputStream in = null;

try {

URL url = new URL(uri);

HttpURLConnection urlcon = (HttpURLConnection) url.openConnection();

urlcon.setRequestMethod("POST");

urlcon.connect();// 获取连接

in = urlcon.getInputStream();

BufferedReader buffer = new BufferedReader(new InputStreamReader(

in, charset));

StringBuffer bs = new StringBuffer();

String line = null;

while ((line = buffer.readLine()) != null) {

bs.append(line);

}

result = bs.toString();

} catch (Exception e) {

System.out.println("[请求异常][地址：" + uri + "][错误信息：" + e.getMessage()

+ "]");

} finally {

try {

if (null != in)

in.close();

} catch (Exception e2) {

System.out.println("[关闭流异常][错误信息：" + e2.getMessage() + "]");

}

}

return result;

}

/**

*

* @param uri

* @param param

* 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。

* @param charset

* @return

*/

public static String sendPost(String uri, String param, String charset) {

String result = null;

PrintWriter out = null;

InputStream in = null;

try {

URL url = new URL(uri);

HttpURLConnection urlcon = (HttpURLConnection) url.openConnection();

urlcon.setDoInput(true);

urlcon.setDoOutput(true);

urlcon.setUseCaches(false);

urlcon.setRequestMethod("POST");

urlcon.connect();// 获取连接

out = new PrintWriter(urlcon.getOutputStream());

out.print(param);

out.flush();

in = urlcon.getInputStream();

BufferedReader buffer = new BufferedReader(new InputStreamReader(

in, charset));

StringBuffer bs = new StringBuffer();

String line = null;

while ((line = buffer.readLine()) != null) {

bs.append(line);

}

result = bs.toString();

} catch (Exception e) {

System.out.println("[请求异常][地址：" + uri + "][参数：" + param + "][错误信息："

+ e.getMessage() + "]");

} finally {

try {

if (null != in)

in.close();

if (null != out)

out.close();

} catch (Exception e2) {

System.out.println("[关闭流异常][错误信息：" + e2.getMessage() + "]");

}

}

return result;

}

}