java如何运行shell命令呢?

java代码运行shell命令

使用ProcessBuilder或Runtime.getRuntime().exec
    即可运行shell命令

ProcessBuilder

ProcessBuilder processBuilder = new ProcessBuilder();
 
	// -- Linux --
	// Run a shell command
	processBuilder.command("bash", "-c", "ls /home/java265/");
 
	// Run a shell script
	//processBuilder.command("path/to/hello.sh");
 
	// -- Windows --
 
	// Run a command
	//processBuilder.command("cmd.exe", "/c", "dir C:\\Users\\java265");
 
	// Run a bat file
	//processBuilder.command("C:\\Users\\java265\\hello.bat");
 
	try {
 
		Process process = processBuilder.start();
 
		StringBuilder output = new StringBuilder();
 
		BufferedReader reader = new BufferedReader(
				new InputStreamReader(process.getInputStream()));
 
		String line;
		while ((line = reader.readLine()) != null) {
			output.append(line + "\n");
		}
 
		int exitVal = process.waitFor();
		if (exitVal == 0) {
			System.out.println("Success!");
			System.out.println(output);
			System.exit(0);
		} else {
			//abnormal...
		}
 
	} catch (IOException e) {
		e.printStackTrace();
	} catch (InterruptedException e) {
		e.printStackTrace();
	}

Runtime.getRuntime().exec()

 
try { 
		// -- Linux --
		
		// Run a shell command
		// Process process = Runtime.getRuntime().exec("ls /home/java265/");
 
		// Run a shell script
		// Process process = Runtime.getRuntime().exec("path/to/hello.sh");
 
		// -- Windows --
		
		// Run a command
		//Process process = Runtime.getRuntime().exec("cmd /c dir C:\\Users\\java265");
 
		//Run a bat file
		Process process = Runtime.getRuntime().exec(
				"cmd /c hello.bat", null, new File("C:\\Users\\java265\\"));
 
		StringBuilder output = new StringBuilder();
 
		BufferedReader reader = new BufferedReader(
				new InputStreamReader(process.getInputStream()));
 
		String line;
		while ((line = reader.readLine()) != null) {
			output.append(line + "\n");
		}
 
		int exitVal = process.waitFor();
		if (exitVal == 0) {
			System.out.println("Success!");
			System.out.println(output);
			System.exit(0);
		} else {
			//abnormal...
		}
 
	} catch (IOException e) {
		e.printStackTrace();
	} catch (InterruptedException e) {
		e.printStackTrace();
	}
}

PING

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
 
public class ProcessBuilderExample1 {
 
    public static void main(String[] args) {
 
        ProcessBuilder processBuilder = new ProcessBuilder();
        // Windows
        processBuilder.command("cmd.exe", "/c", "ping -n 3 google.com");
 
        try {
            Process process = processBuilder.start();
            BufferedReader reader =
                    new BufferedReader(new InputStreamReader(process.getInputStream()));
 
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }
 
            int exitCode = process.waitFor();
            System.out.println("\nExited with error code : " + exitCode);
 
        } catch (IOException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
 
}

host获取主机名

host -ta java265.com

package com.java265.shell;
 
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Arraylist;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
public class ExecuteShellComand {
 
	private static final String IPADDRESS_PATTERN = "([01]?\\d\\d?|2[0-4]\\d|25[0-5])" 
		+ "\\.([01]?\\d\\d?|2[0-4]\\d|25[0-5])" 
		+ "\\.([01]?\\d\\d?|2[0-4]\\d|25[0-5])" 
		+ "\\.([01]?\\d\\d?|2[0-4]\\d|25[0-5])";
 
	private static Pattern pattern = Pattern.compile(IPADDRESS_PATTERN);
	private static Matcher matcher;
 
	public static void main(String[] args) {
		ExecuteShellComand obj = new ExecuteShellComand();
		String domainName = "java265.com";
		String command = "host -t a " + domainName;
		String output = obj.executeCommand(command);
 
		//System.out.println(output);
		
		List<string> list = obj.getIpAddress(output);
 
		if (list.size() > 0) {
			System.out.printf("%s has address : %n", domainName);
			for (String ip : list) {
				System.out.println(ip);
			}
		} else {
			System.out.printf("%s has NO address. %n", domainName);
		}
 
	}
 
	private String executeCommand(String command) {
		StringBuffer output = new StringBuffer();
		Process p;
		try {
			p = Runtime.getRuntime().exec(command);
			p.waitFor();
			BufferedReader reader = 
                           new BufferedReader(new InputStreamReader(p.getInputStream()));
 
			String line = "";			
			while ((line = reader.readLine())!= null) {
				output.append(line + "\n");
			}
 
		} catch (Exception e) {
			e.printStackTrace();
		}
		return output.toString();
	}
 
	public List<string> getIpAddress(String msg) {
		List<string> ipList = new ArrayList<string>();
		if (msg == null || msg.equals(""))
			return ipList;
 
		matcher = pattern.matcher(msg);
		while (matcher.find()) {
			ipList.add(matcher.group(0));
		}
		return ipList;
	}
}