HttpGet 发送请求
public static void main(String[] args) throws IOException { HttpClient httpclienta=null; // 注意 Defaulthttpclient 已过时 // 1. 创建HttpClient CloseableHttpClient httpclient = HttpClientBuilder.create().build(); // 2. 发送get请求 HttpGet httpget = new HttpGet("http://localhost:8080/restws/crm/customer/1122"); // 3. 发送请求 HttpResponse response= httpclient.execute(httpget); // 4. 得到返回信息 HttpEntity entity = response.getEntity(); // 5. 响应参数是否为200 if(response.getStatusLine().getStatusCode()==HttpStatus.SC_OK){ String result = EntityUtils.toString(entity, "UTF-8"); System.out.println(result); }else{ System.out.println("err:" + response.getStatusLine());; } // 6.清楚返回信息 EntityUtils.consume(entity); // 7.关闭流 httpclient.close(); }
附上HttpStatus状态码
public static final int SC_CONTINUE = 100; public static final int SC_SWITCHING_PROTOCOLS = 101; public static final int SC_PROCESSING = 102; public static final int SC_OK = 200; public static final int SC_CREATED = 201; public static final int SC_ACCEPTED = 202; public static final int SC_NON_AUTHORITATIVE_INFORMATION = 203; public static final int SC_NO_CONTENT = 204; public static final int SC_RESET_CONTENT = 205; public static final int SC_PARTIAL_CONTENT = 206; public static final int SC_MULTI_STATUS = 207; public static final int SC_MULTIPLE_CHOICES = 300; public static final int SC_MOVED_PERMANENTLY = 301; public static final int SC_MOVED_TEMPORARILY = 302; public static final int SC_SEE_OTHER = 303; public static final int SC_NOT_MODIFIED = 304; public static final int SC_USE_PROXY = 305; public static final int SC_TEMPORARY_REDIRECT = 307; public static final int SC_BAD_REQUEST = 400; public static final int SC_UNAUTHORIZED = 401; public static final int SC_PAYMENT_REQUIRED = 402; public static final int SC_FORBIDDEN = 403; public static final int SC_NOT_FOUND = 404; public static final int SC_METHOD_NOT_ALLOWED = 405; public static final int SC_NOT_ACCEPTABLE = 406; public static final int SC_PROXY_AUTHENTICATION_REQUIRED = 407; public static final int SC_REQUEST_TIMEOUT = 408; public static final int SC_CONFLICT = 409; public static final int SC_GONE = 410; public static final int SC_LENGTH_REQUIRED = 411; public static final int SC_PRECONDITION_FAILED = 412; public static final int SC_REQUEST_TOO_LONG = 413; public static final int SC_REQUEST_URI_TOO_LONG = 414; public static final int SC_UNSUPPORTED_MEDIA_TYPE = 415; public static final int SC_REQUESTED_RANGE_NOT_SATISFIABLE = 416; public static final int SC_EXPECTATION_FAILED = 417; public static final int SC_INSUFFICIENT_SPACE_ON_RESOURCE = 419; public static final int SC_METHOD_FAILURE = 420; public static final int SC_UNPROCESSABLE_ENTITY = 422; public static final int SC_LOCKED = 423; public static final int SC_FAILED_DEPENDENCY = 424; public static final int SC_INTERNAL_SERVER_ERROR = 500; public static final int SC_NOT_IMPLEMENTED = 501; public static final int SC_BAD_GATEWAY = 502; public static final int SC_SERVICE_UNAVAILABLE = 503; public static final int SC_GATEWAY_TIMEOUT = 504; public static final int SC_HTTP_VERSION_NOT_SUPPORTED = 505; public static final int SC_INSUFFICIENT_STORAGE = 507;
HttpPost 发送请求 需要设置请求信息
HttpPost httpost = new HttpPost("你的URl"); // 设置响应头信息 httpost.addHeader("Connection", "keep-alive"); httpost.addHeader("Accept", "*/*"); httpost.addHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8"); httpost.addHeader("Host", "api.mch.weixin.qq.com"); httpost.addHeader("X-Requested-With", "XMLHttpRequest"); httpost.addHeader("Cache-Control", "max-age=0"); httpost.addHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0) "); httpost.setEntity(new StringEntity(data, "UTF-8")); CloseableHttpResponse response = httpclient.execute(httpost);
HttpEntity entity = response.getEntity();
EntityUtils.consume(entity); httpclient.close();
