第三方接口需要HTTP请求调用 所以就整理了一下 get、post请求的实现
Get请求
public static String sendGet(String url, String path, String param) {
String result = "";
BufferedReader in = null;
try {
String urlNameString = "http://" + url + path + "" + param;
URL realUrl = new URL(urlNameString);
// 打开和URL之间的连接
URLConnection connection = realUrl.openConnection();
// 设置通用的请求属性
connection.setRequestProperty("accept", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 建立实际的连接
connection.connect();
// 获取所有响应头字段
// Map<String, List<String>> map = connection.getHeaderFields();
// 遍历所有的响应头字段
// for (String key : map.keySet()) {
// System.out.println(key + "--->" + map.get(key));
// }
// 定义 BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("发送GET请求出现异常!" + e);
e.printStackTrace();
}
// 使用finally块来关闭输入流
finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return result;
}
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。
* @return 所代表远程资源的响应结果
*/
public static String sendPost(String url, String path, String data) {
PrintWriter out = null;
BufferedReader in = null;
String result = "";
String URL = "http://" + url + path;
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(data);
// 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(), "UTF-8"));
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;
}
PS: 附上get请求时候的参数处理的工具类
public static String getParamsOrderByKey(String method, Map<String, String> paramValues) {
String params = "";
String beginLetter = "";
//如果为get请求则为URL后面拼加?
if ("get".equals(method)) {
beginLetter = "?";
}
List<String> paramNames = new ArrayList<String>(paramValues.size());
paramNames.addAll(paramValues.keySet());
Collections.sort(paramNames);
for (String paramName : paramNames) {
if (params.equals("")) {
params += beginLetter + paramName + "=" + paramValues.get(paramName);
} else {
params += "&" + paramName + "=" + paramValues.get(paramName);
}
}
return params;
}
调用Demo
Map<String, String> personInfoMap = new HashMap<>();
personInfoMap.put("personNo", personNo);
// 解析传入参数
String personInfoParams = ParamsUtils.getParamsOrderByKey("get", personInfoMap);
// 发送请求 获取人脸照片
String facueResult = HttpRequest.sendGet(platFormIp, faceInfo, personInfoParams);
String face = null;
// 解析返回结果
JSONObject faceData = JSONObject.parseObject(facueResult);
if (!"200".equals(faceData.get("code").toString())) {
System.out.println(faceData.get("msg").toString());
return R.error(faceData.get("msg").toString());
} else {
face = faceData.get("data").toString();
return R.ok().put("data", face);
}