java 工具

以下是一个通用的

，可以用于发送

S请求：

 java import java .io.BufferedReader; import java .io.InputStreamReader; import java .net. Http URLConnection; import java .net.URL; import java x.net.ssl. Http sURLConnection; import java x.net.ssl.SSLContext; import java x.net.ssl.TrustManager; import java x.net.ssl.X509TrustManager;  public class Http Utils { / * 发送 HTTP GET请求 * @param url 请求的URL地址 * @return 响应结果 */ public static String send Http Get(String url) throws Exception { URL obj = new URL(url);  Http URLConnection con = ( Http URLConnection) obj.openConnection(); con.setRequestMethod("GET");  int responseCode = con.getResponseCode(); if (responseCode == Http URLConnection. HTTP _OK) { // 成功 BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream())); String inputLine; StringBuffer response = new StringBuffer();  while ((inputLine = in.readLine()) != null) { response.append(inputLine); } in.close(); return response.toString(); } else { throw new Exception(" HTTP请求 失败，返回码：" + responseCode); } }  / * 发送 HTTP S GET请求 * @param url 请求的URL地址 * @return 响应结果 */ public static String send Http sGet(String url) throws Exception { SSLContext sslcontext = SSLContext.getInstance("TLS"); sslcontext.init(null, new TrustManager[] {new X509TrustManager() { public void checkClientTrusted( java .security.cert.X509Certificate[] arg0, String arg1) {} public void checkServerTrusted( java .security.cert.X509Certificate[] arg0, String arg1) {} public java .security.cert.X509Certificate[] getAcceptedIssuers() {return new java .security.cert.X509Certificate[0];} }}, new java .security.SecureRandom());  URL obj = new URL(url);  Http sURLConnection con = ( Http sURLConnection) obj.openConnection(); con.setSSLSocketFactory(sslcontext.getSocketFactory()); con.setRequestMethod("GET");  int responseCode = con.getResponseCode(); if (responseCode == Http sURLConnection. HTTP _OK) { // 成功 BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream())); String inputLine; StringBuffer response = new StringBuffer();  while ((inputLine = in.readLine()) != null) { response.append(inputLine); } in.close(); return response.toString(); } else { throw new Exception(" HTTP S请求失败，返回码：" + responseCode); } } } 

这个

使用了

标准库中的`

URLConnection`和`

sURLConnection`来发送

/

S请求，并且支持GET请求方式。在发送

S请求时，需要先自定义一个`TrustManager`，并且将其设为SSLContext的默认信任管理器，这样才能避免SSL证书验证失败的问题。

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