java原生http请求post

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;
}
}