Method exec

JavaSecurity/Java Basic/Java 回显技术/fdEcho.java:8–23

(String cmd)

public class fdEcho {
    public static String exec(String cmd) {
        try {
            Process process = Runtime.getRuntime().exec(cmd);
            InputStream fis = process.getInputStream();
            InputStreamReader isr = new InputStreamReader(fis);
            BufferedReader br = new BufferedReader(isr);
            String line = null;
            StringBuilder builder = new StringBuilder();
            while ((line = br.readLine()) != null) {
                builder.append(line);
            }
            return builder.toString();
        } catch (Exception ignore) {
        }
        return "";
    }

    public static String ipToHex(String ip) {
        StringBuilder sb = new StringBuilder();