Hi，大家好，我是编程小6，很荣幸遇见你，我把这些年在开发过程中遇到的问题或想法写出来，今天说一说
java 网络_java适配器模式,希望能够帮助你!!!。

Don’t say much, just go to the code.

package org.bood.shimmer.common.utils; import org.springframework.util.MultiValueMap; import org.springframework.web.util.UriComponentsBuilder; import javax.net.ssl.HttpsURLConnection; import javax.servlet.http.HttpServletRequest; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.*; /** * 网络工具包 * * @author bood * @since 2020/9/25 */ public class NetUtils { 
    private NetUtils() { 
    } /** * <p> * 获取请求中的 IP * </p> * * @param request: * @return：java.lang.String * @author：bood * @date：2020/9/25 */ public static String getIpAddress(HttpServletRequest request) { 
    String[] ipHeaders = { 
   "x-forwarded-for", "Proxy-Client-IP", "WL-Proxy-Client-IP", "HTTP_CLIENT_IP", "HTTP_X_FORWARDED_FOR"}; String[] localhostIp = { 
   "127.0.0.1", "0:0:0:0:0:0:0:1"}; String ip = request.getRemoteAddr(); for (String header : ipHeaders) { 
    if (ip != null && ip.length() != 0 && !"unknown".equalsIgnoreCase(ip)) { 
    break; } ip = request.getHeader(header); } for (String local : localhostIp) { 
    if (ip != null && ip.equals(local)) { 
    try { 
    ip = InetAddress.getLocalHost().getHostAddress(); } catch (UnknownHostException ignored) { 
    } break; } } if (ip != null && ip.length() > 15 && ip.contains(",")) { 
    ip = ip.substring(0, ip.indexOf(',')); } return ip; } /** * <p> * IP 转 Integer * </p> * * @param ip: IP 地址 * @return：java.lang.Integer * @author：bood * @date：2020/9/25 */ public static Integer ipToInteger(String ip) { 
    String[] ips = ip.split("\\."); int ipFour = 0; for (String ip4 : ips) { 
    Integer ip4a = Integer.parseInt(ip4); ipFour = (ipFour << 8) | ip4a; } return ipFour; } /** * <p> * Integer 转 IP * </p> * * @param ip: IP 地址 * @return：java.lang.String * @author：bood * @date：2020/9/25 */ public static String IntegerToIp(Integer ip) { 
    StringBuilder sb = new StringBuilder(); for (int i = 3; i >= 0; i--) { 
    int ipa = (ip >> (8 * i)) & (0xff); sb.append(ipa + "."); } sb.delete(sb.length() - 1, sb.length()); return sb.toString(); } /** * <p> * IP 地址是否可达 * </p> * * @param ip: IP 地址 * @return：boolean * @author：bood * @date：2020/9/25 */ public static boolean isReachable(String ip) { 
    InetAddress address; try { 
    address = InetAddress.getByName(ip); if (address.isReachable(5000)) { 
    return true; } } catch (IOException e) { 
    e.printStackTrace(); } return false; } /** * <p> * 根据 url 和请求参数获取 URI * </p> * * @param url: 请求地址 * @param params: 请求参数 * @return：java.net.URI * @author：bood * @date：2020/9/25 */ public static URI getURIwithParams(String url, MultiValueMap<String, String> params) { 
    UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(url).queryParams(params); return builder.build().encode().toUri(); } /** * <p> * 判断网址是否有效 * 对于404页面，如果被电信或者联通劫持了，也会返回200的状态，这个是不准确的 * </p> * * @param url: 请求地址 * @return：boolean * @author：bood * @date：2020/9/25 */ public static boolean isReachable(URL url) { 
    boolean reachable = false; HttpURLConnection httpconn = null; HttpsURLConnection httpsconn = null; int code = 0; try { 
    if ("https".equals(url.getProtocol())) { 
    httpsconn = (HttpsURLConnection) url.openConnection(); code = httpsconn.getResponseCode(); } else { 
    httpconn = (HttpURLConnection) url.openConnection(); code = httpconn.getResponseCode(); } if (code == 200) { 
    reachable = true; } } catch (Exception e) { 
    reachable = false; } return reachable; } /** * <p> * 实现 Ping 命令 * Ping 的字符串换行使用 java 的换行符"\n"，如果 ping 不同返回 null * </p> * * @param ip: IP 地址 * @return：java.lang.String * @author：bood * @date：2020/9/25 */ public static String ping(String ip) { 
    String res = ""; String line = null; try { 
    Process pro = Runtime.getRuntime().exec("ping " + ip); BufferedReader buf = new BufferedReader(new InputStreamReader(pro.getInputStream(), "GBK")); while ((line = buf.readLine()) != null) { 
    if (!"".equals(line)) { 
    res += line + "\n"; } } } catch (Exception e) { 
    res = null; } return res; } } 

今天的分享到此就结束了，感谢您的阅读，如果确实帮到您，您可以动动手指转发给其他人。