Java执行cmd命令

    //在单独的进程中执行指定的字符串命令。
    public Process exec(String command) throws IOException 
    
    //在指定环境的独立进程中执行指定命令和变量
    public Process exec(String command, String[] envp) throws IOException 
    
    //在单独的进程中执行指定命令和变量
    public Process exec(String cmdarray[]) throws IOException 
    
    //在指定环境的独立进程中执行指定的命令和变量
    public Process exec(String[] cmdarray, String[] envp) throws IOException 

    //在有指定环境和工作目录的独立进程中执行指定的字符串命令
    public Process exec(String command, String[] envp, File dir) throws IOException 
    
    //在指定环境和工作目录的独立进程中执行指定的命令和变量
    public Process exec(String[] cmdarray, String[] envp, File dir)

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

public class CMDTest {
    
    public static void main(String[] args) {
        
        // Java调用 dos命令
        String cmd = "ping www.baidu.com";
        try {
            Process process = Runtime.getRuntime().exec(cmd);
            InputStream is = process.getInputStream();
            InputStreamReader isr = new InputStreamReader(is);
            BufferedReader br = new BufferedReader(isr);
            
            String content = br.readLine();
            while (content != null) {
                System.out.println(content);
                content = br.readLine();
            }
            //杀掉进程
            process.destroy();
        } catch (IOException e) {
            e.printStackTrace();
        }
        
    }

}