HttpClient調用RestFul接口（post和get方式）

/**
 * @version V1.0
 * @Description 調用http接口工具類
 * @Author pc
 * @Date 2018/3/2 11:03
 */
public class HttpServiceUtil {
    /**
     * 接口調用(post請求) 數據處理
     *
     * @param url
     *            請求路徑 例如：http://127.0.0.1:8080/test/test
     * @param param
     *            請求參數 例如：{ "userName":"Lily", "password":"123456" }
     * @return 響應數據 例如：{ "resultId":"1" "resultMsg":"操作成功" }
     */
    public static String insureResponsePost(String url, String param) {
        PrintWriter out = null;
        InputStream is = null;
        BufferedReader br = null;
        String result = "";
        HttpURLConnection conn = null;
        StringBuffer strBuffer = new StringBuffer();
        try {
            URL realUrl = new URL(url);
            conn = (HttpURLConnection) realUrl.openConnection();
            // 設置通用的請求屬性
            conn.setRequestMethod( "POST");
            conn.setConnectTimeout(20000);
            conn.setReadTimeout(300000);
            conn.setRequestProperty("Charset", "UTF-8");
　　　　　　　// 傳輸數據為json，如果為其他格式可以進行修改
            conn.setRequestProperty( "Content-Type", "application/json");
            conn.setRequestProperty( "Content-Encoding", "utf-8");
            // 發送POST請求必須設置如下兩行
            conn.setDoOutput( true);
            conn.setDoInput( true);
            conn.setUseCaches( false);
            // 獲取URLConnection對象對應的輸出流
            out = new PrintWriter(conn.getOutputStream());
            // 發送請求參數
            out.print(param);
            // flush輸出流的緩沖
            out.flush();
            is = conn.getInputStream();
            br = new BufferedReader( new InputStreamReader(is));
            String line = null;
            while ((line=br.readLine())!= null) {
                strBuffer.append(line);
            }
            result = strBuffer.toString();
        } catch (Exception e) {
            System. out.println( "發送 POST 請求出現異常！" + e);
            e.printStackTrace();
        }
        // 使用finally塊來關閉輸出流、輸入流
        finally {
            try {
                if (out != null) {
                    out.close();
                }
                if (br != null) {
                    br.close();
                }
                if (conn!= null) {
                    conn.disconnect();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return result;
    }

    /**
     * Http接口調用(get請求) 數據處理
     * @param url     請求地址  例如：http://127.0.0.1:8080/test/test?username=zhangsan$username=123456

     * @return
     */

 public static String insureResponseBlockGet(String url) {
 PrintWriter out = null;
 String result = "";
 HttpURLConnection conn = null;
 InputStream is = null;
 BufferedReader br = null;
 StringBuffer strBuffer = new StringBuffer();
 try {
 URL realUrl = new URL(url);
 // 打開和URL之間的連接
 conn = (HttpURLConnection) realUrl.openConnection();
 // 設置通用的請求屬性
 conn.setRequestMethod("GET");
 conn.setConnectTimeout(20000);
 conn.setReadTimeout(300000);
　　　　　　 // 傳輸數據為json，如果為其他格式可以進行修改
 conn.setRequestProperty("Content-Type", "application/json");
 is = conn.getInputStream();
 br = new BufferedReader( new InputStreamReader(is));
 String line = null;
 while ((line=br.readLine())!= null) {
 strBuffer.append(line);
 }
 result = strBuffer.toString();
 } catch (Exception e) {
 System.out.println( "發送 GET請求出現異常！" + e);
 e.printStackTrace();
 }
 // 使用finally塊來關閉輸出流、輸入流
 finally {
 try {
 if (out != null) {
 out.close();
 }
 if (br != null) {
 br.close();
 }
 if (conn != null) {
 conn.disconnect();
 }
 } catch (IOException ex) {
 ex.printStackTrace();
 }
 }
 return result;
 }
}