/**

* @param url:请求url

* @param content: 请求体(参数)

* @return errorStr:错误信息;status:状态码，response：返回数据

*/

public Map request(String url, String content) {

Map result = new HashMap();

String errorStr = "";

String status = "";

String response = "";

PrintWriter out = null;

BufferedReader in = null;

try {

URL realUrl = new URL(url);

// 打开和URL之间的连接

URLConnection conn = realUrl.openConnection();

HttpURLConnection httpUrlConnection = (HttpURLConnection) conn;

// 设置请求属性

httpUrlConnection.setRequestProperty("Content-Type", "application/json");

// 发送POST请求必须设置如下两行

httpUrlConnection.setDoOutput(true);

httpUrlConnection.setDoInput(true);

// 获取URLConnection对象对应的输出流

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

// 发送请求参数

out.write(content);

// flush输出流的缓冲

out.flush();

httpUrlConnection.connect();

// 定义BufferedReader输入流来读取URL的响应

in = new BufferedReader(new InputStreamReader(httpUrlConnection.getInputStream()));

String line;

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

response += line;

}

status = new Integer(httpUrlConnection.getResponseCode()).toString();

} catch (Exception e) {

System.out.println("发送 POST 请求出现异常！" + e);

errorStr = e.getMessage();

}

// 使用finally块来关闭输出流、输入流

finally {

try {

if (out != null) { out.close();}

if (in != null) {in.close();}

} catch (Exception ex) {

ex.printStackTrace();

}

}

result.put("errorStr", errorStr);

result.put("response", response);

result.put("status", status);

return result;

}