java代码发送JSON格式的httpPOST请求

转载：http://www.2cto.com/kf/201206/136879.html

package study;


import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import net.sf.json.JSONObject;


public class JSONJavaHttpDemo {


public static final String ADD_URL = "http://www.2cto.com";


public static void appadd() {


try {
// 创建连接
URL url = new URL(ADD_URL);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setRequestMethod("POST");
connection.setUseCaches(false);
connection.setInstanceFollowRedirects(true);
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");


connection.connect();


// POST请求
DataOutputStream out = new DataOutputStream(connection.getOutputStream());
JSONObject obj = new JSONObject();
obj.element("app_name", "asdf");
obj.element("app_ip", "10.21.243.234");
obj.element("app_port", 8080);
obj.element("app_type", "001");
obj.element("app_area", "asd");


out.writeBytes(obj.toString());
out.flush();
out.close();


// 读取响应
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String lines;
StringBuffer sb = new StringBuffer("");
while ((lines = reader.readLine()) != null) {
lines = new String(lines.getBytes(), "utf-8");
sb.append(lines);
}
System.out.println(sb);
reader.close();
// 断开连接
connection.disconnect();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}


}


public static void main(String[] args) {
appadd();
}


}