使用java实现cmd操作

使用java实现编写一个bat脚本，并运行该脚本。该脚本实现自动编译并运行java文件

import java.io.BufferedWriter; import java.io.File; import java.io.FileOutputStream; import java.io.OutputStreamWriter; /**  *  * @author  */ public class CmdTest {          public static void main(String[] args) {         Runtime rt = Runtime.getRuntime();         try {             File file = new File("D:\\2017\\test\\Test.bat");             if(file.exists()){                 file.delete();             }             file.createNewFile();             BufferedWriter bw = new BufferedWriter(                 new OutputStreamWriter(                 new FileOutputStream(file), "UTF-8"));             bw.write("D:");             bw.newLine();             bw.write("cd ./2017/Test");             bw.newLine();             bw.write("javac Test.java");             bw.newLine();             bw.write("timeout 3");             bw.newLine();             bw.write("java Test");             bw.newLine();             bw.write("pause");             bw.close();                          rt.exec("cmd /c start D:\\2017\\Test\\Test.bat");//实现打开cmd执行脚本             //System.out.println("结果："+rt.exec("cmd D:\\2017\\Test\\Test.bat").toString());         } catch (Exception e){          System.out.println("错误："+e);         }     } }