Http的POST方式提交给服务器

最新推荐文章于 2025-06-11 13:06:20 发布

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最新推荐文章于 2025-06-11 13:06:20 发布

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分类专栏： android

本文链接：https://blog.youkuaiyun.com/a79412906/article/details/9020939

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本文介绍了一个简单的HTTP请求工具类的实现，该工具类通过Java的HttpURLConnection发送POST请求，并处理了请求参数的编码和响应结果的读取过程。

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public class HttpUtil {

	private static String PATAH="http://112.83.242.73/http/HttpServlet";
	private static URL url;
	static {
		try {
			url=new URL(PATAH);
		} catch (MalformedURLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	public static String sendPost(Map<String,String> params,String encode){
		StringBuffer buffer=new StringBuffer();
		try{
			if(params!=null && !params.isEmpty()){
				//拼接StringBuffer
				for(Map.Entry<String, String> entry: params.entrySet()){
					buffer.append(entry.getKey())
					.append("=")
					.append(URLEncoder.encode(entry.getValue(),encode))
					.append("&");
					
				}
			}
			buffer.deleteCharAt(buffer.length()-1);
			HttpURLConnection urlConnection=(HttpURLConnection)url.openConnection();
			urlConnection.setConnectTimeout(3000);
			urlConnection.setDoInput(true);
			urlConnection.setDoOutput(true);
			//获得上传的信息的字节大小,将StringBuffer变成字符串
			
			byte[] mydata=buffer.toString().getBytes();
			urlConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
			urlConnection.setRequestProperty("Content-Length", String.valueOf(mydata.length));
			//获得输出流，向服务输出数据
			OutputStream outputStream=urlConnection.getOutputStream();
			outputStream.write(mydata);
			//状态码
			int responseCode=urlConnection.getResponseCode();
			if(responseCode==200){
				return changInputStream(urlConnection.getInputStream(),encode);
			}
		}catch(Exception e){
			e.printStackTrace();
		}
		
		return "";
		
	}
	private static String changInputStream(InputStream inputStream,String encode) {
	
		//将输入流变成字符串
		ByteArrayOutputStream byteArrayOutputStream=new ByteArrayOutputStream();
		byte[] data=new byte[1024];
		int len=0;
		String result="";
		try{
		if(inputStream!=null){
			while((len=inputStream.read(data))!=-1){
				byteArrayOutputStream.write(data,0,len);
				
			}
		}
		result=new String(byteArrayOutputStream.toByteArray(),encode);
		}catch(Exception e){
			
		}
		
		return result;
	}

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Map<String, String>map=new HashMap<String, String>();
		map.put("username", "rrr");
		System.out.println(sendPost(map,"utf-8"));
	}

}