process.waitFor()返回6怎么解决,在数据库备份时

  arg.append("mysqldump --column-statistics=0 -h"+ip);
        arg.append(" -u"+userName);
        arg.append(" -p"+password);
        arg.append(" "+databaseName);
        arg.append(" --tables "+table_en);
        arg.append(">"+savePath+fileName);
        System.out.println(arg.toString());
        
        Process process = Runtime.getRuntime().exec(arg.toString());
        InputStreamReader inputStreamReader = new InputStreamReader(process.getInputStream(), "utf8");
        bufferedReader = new BufferedReader(inputStreamReader);
        String line;
        while((line = bufferedReader.readLine())!= null){
            printWriter.println(line);
        }
 
        printWriter.flush();
        System.out.println(process.waitFor());
        if(process.waitFor() == 0){//如果进程成功运行
            System.out.println("备份成功！");
        }else {
            System.out.println("备份失败！");
        }

使用Process.getInputStream()将命令的输出自己写入文件

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