Java obtains the information instance code of the current operating system

There are several methods for mainstream use, one is to use the following function

publicstaticStringgetProperty(Stringkey)

One is to use the command line to obtain it

 import java.io.BufferedReader;import java.io.InputStream;import java.io.InputStreamReader;import java.net.InputStreamReader;import java.net.IntAddress;import java.net.NetworkInterface;import java.util.ArrayList;import java.util.Formatter;import java.util.List;import java.util.Locale;import java.util.Map;import java.util.Properties;public class test {//Get the computer's configuration information by intercepting cmd flow (bad) public static List<String> getIpAddress() {Process p = null;List<String> address = new ArrayList<String>();try {p = new ProcessBuilder("ipconfig", "/all").start();}catch (Exception e) {return address;}StringBuffer sb = new StringBuffer();//Read the process output value InputStream inputStream = p.getInputStream();BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));String s = "";try {while ((s = br.readLine()) != null) {sb.append(s + "/n");}}catch (Exception e) {e.printStackTrace();} finally {try {inputStream.close();}catch (Exception e) {e.printStackTrace();}}System.out.println(sb); return address;}public static void getIpconfig() {Map<String, String> map = System.getenv();System.out.println(map.get("USERNAME"));//Get username System.out.println(map.get("COMPUTERNAME"));//Get computer name System.out.println(map.get("USERDOMAIN"));//Get computer domain name}//Get computer ip address and mac address public static void getConfig() {try {InetAddress address = InetAddress.getLocalHost();NetworkInterface ni = NetworkInterface.getByInetAddress(address);//ni.getInetAddresses().nextElement().getAddress();byte[] mac = ni.getHardwareAddress();String sIP = address.getHostAddress();String sMAC = "";Formatter formatter = new Formatter();for (int i = 0; i < mac.length; i++) {sMAC = formatter.format(Locale.getDefault(), "%02X%s", mac[i], (i < mac.length - 1) ? "-" : "").toString();}System.out.println("IP:" + sIP);System.out.println("MAC:" + sMAC);}catch (Exception e) {e.printStackTrace();}}//Get the computer's ip, name, operating system name, operating system version public static void Config() {try {InetAddress addr = InetAddress.getLocalHost();String ip = addr.getHostAddress().toString();//Get native ipString hostName = addr.getHostName().toString();//Get the native computer name System.out.println("Native IP:" + ip + "/nNative name:" + hostName);Properties props = System.getProperties();System.out.println("Operating system name:" + props.getProperty("os.name"));System.out.println("Operating system version:" + props.getProperty("os.version"));}catch (Exception e) {e.printStackTrace();}}//Some other things will be used public static void all() {Properties props = System.getProperties();System.out.println("Java's runtime environment version: " + props.getProperty("java.version"));System.out.println("Java's runtime environment vendor: " + props.getProperty("java.vendor"));System.out.println("Java's runtime vendor: " + props.getProperty("java.vendor.url"));System.out.println("Java's installation path: " + props.getProperty("java.home"));System.out.println("Java virtual machine specification version: " + props.getProperty("java.vm.specification.version"));System.out.println("Java virtual machine specification vendor: " + props.getProperty("java.vm.specification.vendor"));System.out.println("Java virtual machine specification name: " + props.getProperty("java.vm.specification.name"));System.out.println("Java virtual machine specification version: " + props.getProperty("java.vm.specification.name"));System.out.println("Java virtual machine implementation version: " + props.getProperty("java.vm.version"));System.out.println("Java virtual machine implementation vendor: " + props.getProperty("java.vm.vendor"));System.out.println("Java virtual machine implementation name: " + props.getProperty("java.vm.name"));System.out.println("Java runtime environment specification version: " + props.getProperty("java.specification.version"));System.out.println("Java runtime environment specification vendor: " + props.getProperty("java.specification.version"));System.out.println("Java runtime environment specification vendor: " + props.getProperty("java.specification.vender"));System.out.println("Java runtime environment specification name: " + props.getProperty("java.specification.name"));System.out.println("Java class format version number: " + props.getProperty("java.class.version"));System.out.println("Java class path: " + props.getProperty("java.class.path"));System.out.println("List of paths searched when loading library: " + props.getProperty("java.library.path"));System.out.println("Default temporary file path: " + props.getProperty("java.io.tmpdir"));System.out.println("Path to one or more extension directories: " + props.getProperty("java.ext.dirs"));System.out.println("Operation system name: " + props.getProperty("os.name"));System.out.println("Operation system architecture: " + props.getProperty("os.arch"));System.out.println("Operation system version:" + props.getProperty("os.version"));System.out.println("file separator: " + props.getProperty("file.separator"));//In unix system it is "/n"System.out.println("path separator: " + props.getProperty("path.separator"));//In unix system it is ":"System.out.println("line separator: " + props.getProperty("line.separator"));//In unix system it is "/n"System.out.println("user's account name: " + props.getProperty("user.name"));System.out.println("User's home directory: " + props.getProperty("user.home"));System.out.println("User's current working directory: " + props.getProperty("user.dir"));}public static void main(String[] args) {getConfig();Config();all();}}

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