package db.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.util.List;

public class CMDUtil {

	public static String runCMD(String cmd) throws IOException {
        // ProcessBuilder是一个用于创建操作系统进程的类，它的start()方法用于启动一个进行
        ProcessBuilder processBuilder = new ProcessBuilder(cmd);
        // 启动进程
        Process process = processBuilder.start();
        // 解析输出
        String result = convertStreamToStr(process.getInputStream());
//        System.out.println(result);
        return result;
    }
	public static String runCMD(List<String> commandList) throws IOException {
        // 创建命令集合
        // ProcessBuilder是一个用于创建操作系统进程的类，它的start()方法用于启动一个进行
        ProcessBuilder processBuilder = new ProcessBuilder(commandList);
        // 启动进程
        Process process = processBuilder.start();
        // 解析输出
        String result = convertStreamToStr(process.getInputStream());
//        System.out.println(result);
        return result;
    }
    public static String convertStreamToStr(InputStream is) throws IOException {
        if (is != null) {
            Writer writer = new StringWriter();
            char[] buffer = new char[1024];
            try {
                Reader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
                int n;
                while ((n = reader.read(buffer)) != -1) {
                    writer.write(buffer, 0, n);
                }
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                is.close();
            }
            return writer.toString();
        } else {
            return "";
        }
    }
}