HTTP GET/POST PARAM

Java实现HTTP请求

import org.apache.commons.lang3.StringUtils;

import java.io.*;
import java.net.*;

public class HTTPUtil {

    public static String HTTPGet(String url, String param) {
        InputStream inputStream = null;
        BufferedReader bufferedReader = null;
        HttpURLConnection connection = null;
        StringBuffer stringBuffer = null;
        try {
            String urlNameString = url + (StringUtils.isBlank(param) ? "" : ("?" + param));
            //创建连接
            URL realUrl = new URL(urlNameString);
            //            URL url = new URL("http://192.168.31.179:19303/entity-area/queryAreaList");

            //通过远程url连接对象打开一个连接，强转成httpURLConnection类
            connection = (HttpURLConnection) realUrl.openConnection();

            // 设置通用的请求属性
            connection.setRequestProperty("accept", "**");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
//       URL连接可以用于输入和/或输出。如果想使用URL连接作为输入，设置DoInput *标志为true，如果不是假的。默认为true
            connection.setDoOutput(true);
            connection.setDoInput(true);
// 获取URLConnection对象对应的输出流
            PrintWriter out = new PrintWriter(connection.getOutputStream());
            // 发送请求参数
            out.print(param);
            // flush输出流的缓冲
            out.flush();
//发送请求
            connection.connect();
            inputStream = connection.getInputStream();
            inputStreamReader = new InputStreamReader(inputStream, "UTF-8");
            bufferedReader = new BufferedReader(inputStreamReader);
            stringBuffer = new StringBuffer();
            String temp = null;
            while ((temp = bufferedReader.readLine()) != null) {
                stringBuffer.append(temp);
                stringBuffer.append("rn");
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (null != inputStream) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (null != inputStreamReader) {
                try {
                    inputStreamReader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (null != bufferedReader) {
                try {
                    bufferedReader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (null != connection) {
                //关闭远程连接
                connection.disconnect();
            }
        }
        return stringBuffer.toString();
    }


  

}