命令行工具类

作者:追风剑情 发布于:2016-8-19 13:00 分类:C#

CommandLine类用来解析命令行字符串,通过扩展子类来实现不同命令的功能。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;

namespace CommandLineTool
{
    class Program
    {
        static void Main(string[] args)
        {
            //测试命令
            CommandLine cmdLine = new CommandLine("jar -cvf xxx.jar *");
            CommandLine cmdLine1 = new CommandLine("copy \"C:\\Program Files\\text.txt\" \"D:\\dir1\\text.txt\"");
            Console.WriteLine(cmdLine.ToString());
            Console.WriteLine(cmdLine1.ToString());

            CommandLine cmdLine2 = CommandLine.Create("copy \"C:\\Program Files\\text.txt\" \"D:\\dir1\\text.txt\"");
            Console.WriteLine(cmdLine2.ToString());
            if (null != cmdLine2)
                cmdLine2.Execute();

            Console.Read();
        }
    }

    public class CommandLine
    {
        private string _origin;
        private string _cmd;
        private string[] _params;

        public string cmd { get { return _cmd; } }
        public string[] cparams { get { return _params; } }

        public static CommandLine Create(string origin)
        {
            string cmd = ParseCmdType(origin);
            char[] cmdChars = cmd.ToCharArray();
            //首字母转成大写
            if (cmdChars[0] >= 97)
                cmdChars[0] = (char)((byte)cmdChars[0] - 32);
            string className = new string(cmdChars) + "Command";
            Type type = Type.GetType("CommandLineTool."+className);
            CommandLine cmdLine = null;
            if (null != type)
            {
                cmdLine = (CommandLine)Activator.CreateInstance(type);
                cmdLine.SetOrigin(origin);
            }
            return cmdLine;
        }

        private static string ParseCmdType(string s)
        {
            string cmd;
            int index = s.IndexOf(" ");
            if (-1 == index)
                cmd = s;
            else
                cmd = s.Substring(0, index);
            return cmd;
        }

        public CommandLine()
        {

        }

        public CommandLine(string origin)
        {
            SetOrigin(origin);
        }

        public void SetOrigin(string origin)
        {
            if (string.IsNullOrWhiteSpace(origin))
                throw new Exception("命令行不能为空");
            _origin = origin.Trim();
            ParseCmd(_origin);
        }

        private void ParseCmd(string s)
        {
            int index = s.IndexOf(" ");
            if (-1 == index)
            {
                _cmd = s;
            }
            else
            {
                _cmd = s.Substring(0, index);
                string p = s.Substring(index).Trim();
                ParseParams(p);
            }
        }

        private void ParseParams(string s)
        {
            List<int> spaceIndexs = new List<int>();

            for (int i = 0; i < s.Length; i++)
            {
                //发现前引号
                if (s[i] == '"')
                {
                    i = IndexOfquo(s, i);
                }
                else if (s[i] == ' ')//发现参数分隔符
                {
                    i = IndexOfSpace(s, i);
                    spaceIndexs.Add(i);
                }
            }

            _params = new string[spaceIndexs.Count + 1];

            spaceIndexs.Insert(0, 0);
            spaceIndexs.Add(s.Length);

            for (int i = 0; i+1 < spaceIndexs.Count; i++)
            {
                int start = spaceIndexs[i];
                int end = spaceIndexs[i+1];
                _params[i] = TrimQuo(Substring(s, start, end).Trim());
            }
        }

        //搜索连续空格中的最后一个空格索引号
        private int IndexOfSpace(string s, int start)
        {
            int index = start;
            for (index = start + 1; index < s.Length; index++)
            {
                if (s[index] != ' ')
                {
                    index--;
                    break;
                }
            }
            return index;
        }

        //搜索后引号
        private int IndexOfquo(string s, int start)
        {
            int index;
            for (index = start + 1; index < s.Length; index++)
            {
                if (s[index] == '"' && s[index - 1] != '\\')
                {
                    break;
                }
            }
            return index;
        }

        private string Substring(string s, int start, int end)
        {
            s = s.Substring(start, end - start);
            return s;
        }

        //去除字符串前后引号
        private string TrimQuo(string s)
        {
            if (s[0] == '"' && s[s.Length - 1] == '"')
            {
                s = s.Substring(1, s.Length - 2);
            }
            return s;
        }

        public override string ToString()
        {
            StringBuilder sb = new StringBuilder();
            if (null != _params)
            {
                for (int i = 0; i < _params.Length; i++)
                    sb.AppendFormat("{0} ,", _params[i]);
            }
            string s = string.Format("cmd={0}; params={1}", cmd, sb.ToString());
            return s;
        }

        /// <summary>
        /// 执行具体功能,此方法由子类实现。
        /// </summary>
        public virtual void Execute() { }
    }

    //Copy命令
    public class CopyCommand : CommandLine
    {
        public override void Execute()
        {
            Console.WriteLine("执行CopyCommand");
        }
    }
}

 

运行测试

1111111111.png

 

标签: C#

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