【开发环境】Java 文件生成 Windows 系统 .bat 批处理文件并自动执行 ( 输出 GB2312 格式处理中文乱码 | \r\n换行 | Runtime 执行 Cmd 命令 )

import java.io.*;
public class Main {
    public static void main(String[] args) throws Exception {
        File bat = new File("cmd.bat");
        OutputStreamWriter osw =new OutputStreamWriter(
                (new FileOutputStream("cmd.bat")),"gb2312");
        osw.write("echo 生成 BAT 脚本\r\n");
        osw.write("echo 执行命令\r\n");
        osw.close();
        String ret = excuteCmdCommand("cmd.bat");
        System.out.println(ret);
    }
    /**
     * 执行 cmd 命令
     * @param cmdCommand
     * @return
     */
    public static String excuteCmdCommand(String cmdCommand)
    {
        StringBuilder stringBuilder = new StringBuilder();
        Process process = null;
        try {
            process = Runtime.getRuntime().exec(cmdCommand);
            BufferedReader bufferedReader = new BufferedReader(
                    new InputStreamReader(process.getInputStream(), "GBK"));
            String line = null;
            while((line=bufferedReader.readLine()) != null)
            {
                stringBuilder.append(line+"\n");
            }
            return stringBuilder.toString();
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
}