Java访问restful接口

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其实java访问restful接口和访问一般的接口一样的，案例如下：

private Map<String,String> getIpMap(Map<String, Object> map, String today) {	    
     //json模板
	String request_tpl = "{\"type-a\" : {\"properties\" : { \"value\" : {\"type\":\"long\"} }}}"; 
	String targetURL = "http://10.10.10.10:9200/myindex/_search";
	Map<String, String> resultmap = WebUtil.doPostJson(request_tpl, targetURL);
	return resultmap ;
}



public static Map<String, String> doPostJson(String json, String url) {
		Map<String, String> resultMap = new HashMap<String, String>();
		int statusCode = -1;
		try {
			URL httpUrl = new URL(url);
			HttpURLConnection conn = null;
			if ("https".equals(httpUrl.getProtocol())) {
				SSLContext ctx = null;
				try {
					ctx = SSLContext.getInstance("TLS");
					ctx.init(new KeyManager[0], new TrustManager[] { new DefaultTrustManager() }, new SecureRandom());
				} catch (Exception e) {
					throw new IOException(e);
				}
				HttpsURLConnection connHttps = (HttpsURLConnection) httpUrl.openConnection();
				connHttps.setSSLSocketFactory(ctx.getSocketFactory());
				connHttps.setHostnameVerifier(new HostnameVerifier() {
					public boolean verify(String hostname, SSLSession session) {
						return true;// 默认都认证通过
					}
				});
				conn = connHttps;
			} else {
				conn = (HttpURLConnection) httpUrl.openConnection();
			}

			conn.setRequestMethod("POST");//PUT,POST,GET
			conn.setDoOutput(true);
			conn.setRequestProperty("Content-Type", "application/json");
			conn.setConnectTimeout(60000);
			conn.setReadTimeout(60000);
			//
			StringBuffer params = new StringBuffer();
			params.append(json);
			byte[] bypes = params.toString().getBytes();
			conn.getOutputStream().write(bypes);//
			//获取响应码失败
			statusCode = conn.getResponseCode();
			System.out.println(statusCode);
			String result = "";
			if (statusCode >= 200 && statusCode <= 299 && conn.getInputStream() != null) {
				result = getStreamAsString(conn.getInputStream(), DEFAULT_CHARSET);
			}
			System.out.println("result=" + result);
			resultMap.put("statuscode", statusCode + "");
			resultMap.put("msg", result);
		} catch (Exception e) {
			resultMap.put("statuscode", statusCode + "");
			resultMap.put("msg", e.getMessage().substring(0,500));
			e.printStackTrace();
		}
		return resultMap;
	}

 

转载于:https://my.oschina.net/weiweiblog/blog/1826817