http接口调用

import org.testng.annotations.Test;

public class HttpTest {

String creatOrderUrl="http://xxx.xxx.net/scriptParams/runScripts?ids=2303";

@Test  //可以直接运行了，注意调用http接口，都不能继承别的接口（例如hsf），
public void testCrestOrder() {
    System.out.println("url=="+creatOrderUrl);//
    httpRequest(creatOrderUrl);
    //System.out.println("url2=="+httpRequest(creatOrderUrl));
}

/**get请求*/
public static String httpRequest(String req_url) {
    StringBuffer buffer = new StringBuffer();
    try {
        URL url = new URL(req_url);
        HttpURLConnection httpUrlConn = (HttpURLConnection) url.openConnection();

        httpUrlConn.setDoOutput(false);
        httpUrlConn.setDoInput(true);
        httpUrlConn.setUseCaches(false);

        httpUrlConn.setRequestMethod("GET");
        httpUrlConn.connect();

        // 将返回的输入流转换成字符串
        InputStream inputStream = httpUrlConn.getInputStream();
        InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
        BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

        String str = null;
        while ((str = bufferedReader.readLine()) != null) {
            buffer.append(str);
        }
        bufferedReader.close();
        inputStreamReader.close();
        // 释放资源
        inputStream.close();
        inputStream = null;
        httpUrlConn.disconnect();

    } catch (Exception e) {
        System.out.println(e.getStackTrace());
    }
    return buffer.toString();
}

/**POST 请求
 *
 */
/**
 * 向指定 URL 发送POST方法的请求
 *
 * @param url
 *            发送请求的 URL
 * @param param
 *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
 * @param isproxy
 *               是否使用代理模式
 * @return 所代表远程资源的响应结果
 */
public static String sendPost(String url, String param,boolean isproxy) {
    OutputStreamWriter out = null;
    BufferedReader in = null;
    String result = "";
    try {
        URL realUrl = new URL(url);
        HttpURLConnection conn = null;
        if(isproxy){//使用代理模式
            @SuppressWarnings("static-access")
            Proxy proxy = new Proxy(Proxy.Type.DIRECT.HTTP, new InetSocketAddress(proxyHost, proxyPort));
            conn = (HttpURLConnection) realUrl.openConnection(proxy);
        }else{
            conn = (HttpURLConnection) realUrl.openConnection();
        }
        // 打开和URL之间的连接

        // 发送POST请求必须设置如下两行
        conn.setDoOutput(true);
        conn.setDoInput(true);
        conn.setRequestMethod("POST");    // POST方法


        // 设置通用的请求属性

        conn.setRequestProperty("accept", "*/*");
        conn.setRequestProperty("connection", "Keep-Alive");
        conn.setRequestProperty("user-agent",
                "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
        conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

        conn.connect();

        // 获取URLConnection对象对应的输出流
        out = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");
        // 发送请求参数
        out.write(param);
        // flush输出流的缓冲
        out.flush();
        // 定义BufferedReader输入流来读取URL的响应
        in = new BufferedReader(
                new InputStreamReader(conn.getInputStream()));

        String line;
        while ((line = in.readLine()) != null) {
            result += line;
        }
    } catch (Exception e) {
        System.out.println("发送 POST 请求出现异常！"+e);
        e.printStackTrace();
    }
    //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(IOException ex){
            ex.printStackTrace();
        }
    }
    return result;
}
/**
 * 发送Http post请求
 *
 * @param xmlInfo
 *            json转化成的字符串
 * @param URL
 *            请求url
 * @return 返回信息
 */
public static String doHttpPost(String xmlInfo, String URL) {
    System.out.println("发起的数据:" + xmlInfo);
    byte[] xmlData = xmlInfo.getBytes();
    InputStream instr = null;
    java.io.ByteArrayOutputStream out = null;
    try {
        URL url = new URL(URL);
        URLConnection urlCon = url.openConnection();
        urlCon.setDoOutput(true);
        urlCon.setDoInput(true);
        urlCon.setUseCaches(false);
        urlCon.setRequestProperty("content-Type", "application/json");
        urlCon.setRequestProperty("charset", "utf-8");
        urlCon.setRequestProperty("Content-length",
                String.valueOf(xmlData.length));
        System.out.println(String.valueOf(xmlData.length));
        DataOutputStream printout = new DataOutputStream(
                urlCon.getOutputStream());

        printout.write(xmlData);
        printout.flush();
        printout.close();
        instr = urlCon.getInputStream();
        byte[] bis = IOUtils.toByteArray(instr);
        String ResponseString = new String(bis, "UTF-8");
        if ((ResponseString == null) || ("".equals(ResponseString.trim()))) {
            System.out.println("返回空");
        }
        System.out.println("返回数据为:" + ResponseString);
        return ResponseString;

    } catch (Exception e) {
        e.printStackTrace();
        return "0";
    } finally {
        try {
            out.close();
            instr.close();

        } catch (Exception ex) {
            return "0";
        }
    }
}
方法二：
/**
 * 向指定 URL 发送POST方法的请求
 *
 * @param url
 *            发送请求的 URL
 * @param param
 *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
 * @return 所代表远程资源的响应结果
 */
public static String sendPostNew(String url, String param) {
    PrintWriter out = null;
    BufferedReader in = null;
    String result = "";
    try {
        URL realUrl = new URL(url);
        // 打开和URL之间的连接
        URLConnection conn = realUrl.openConnection();

        // 设置通用的请求属性
        conn.setRequestProperty("accept", "*/*");
        conn.setRequestProperty("connection", "Keep-Alive");
        conn.setRequestProperty("user-agent",
                "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");

        // 发送POST请求必须设置如下两行
        conn.setDoOutput(true);
        conn.setDoInput(true);

        // 获取URLConnection对象对应的输出流
        out = new PrintWriter(conn.getOutputStream());
        // 发送请求参数
        out.print(param);
        // flush输出流的缓冲
        out.flush();
        // 定义BufferedReader输入流来读取URL的响应
        in = new BufferedReader(
                new InputStreamReader(conn.getInputStream()));
        String line;
        while ((line = in.readLine()) != null) {
            result += line;
        }
    } catch (Exception e) {
        System.out.println("发送 POST 请求出现异常！"+e);
        e.printStackTrace();
    }
    //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(IOException ex){
            ex.printStackTrace();
        }
    }
    return result;
}
｝
注意事项：如果调用post接口，返回报错405（连接被拒绝），把post改成GET即可，原因是后台要求是GET请求，发送post请求肯定会被拒绝。