Unity3D中读取CSV文件

转自  https://www.cnblogs.com/lyh916/p/8588218.html

参考链接:

https://www.cnblogs.com/lulianqi/p/6385503.html

http://blog.csdn.net/paul342/article/details/22800137

说明:

1.写入一个单元格时,如果含有逗号,则需要将整个字段用双引号括起来;如果里面还有双引号就替换成两个双引号。

2.写入一行时,末尾要加上\r\n作为行分隔符。

3.读取时,也要根据上面的写入规则进行解析。

using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;
using UnityEngine;

public class CSVTool : MonoBehaviour {
    private static char _csvSeparator = ',';
    private static bool _trimColumns = false;
    //获取一个单元格的写入格式
    public static string GetCSVFormat(string str)
    {
        string tempStr = str;
        if (str.Contains(","))
        {
            if (str.Contains("\""))
            {
                tempStr = str.Replace("\"", "\"\"");
            }
            tempStr = "\"" + tempStr + "\"";
        }
        return tempStr;
    }
    //获取一行的写入格式
    public static string GetCSVFormatLine(List<string> strList)
    {
        string tempStr = "";
        for (int i = 0; i < strList.Count - 1; i++)
        {
            string str = strList[i];
            tempStr = tempStr + GetCSVFormat(str) + ",";
        }
        tempStr = tempStr + GetCSVFormat(strList[strList.Count - 1]) + "\r\n";
        return tempStr;
    }
    //解析一行
    public static List<string> ParseLine(string line)
    {
        StringBuilder _columnBuilder = new StringBuilder();
        List<string> Fields = new List<string>();
        bool inColum = false;//是否是在一个列元素里
        bool inQuotes = false;//是否需要转义
        bool isNotEnd = false;//读取完毕未结束转义
        _columnBuilder.Remove(0, _columnBuilder.Length);

        //空行也是一个空元素,一个逗号是2个空元素
        if (line == "")
        {
            Fields.Add("");
        }
        // Iterate through every character in the line  遍历行中的每个字符
        for (int i = 0; i < line.Length; i++)
        {
            char character = line[i];

            //If we are not currently inside a column   如果我们现在不在一列中
            if (!inColum)
            {
                // If the current character is a double quote then the column value is contained within
                //如果当前字符是双引号,则列值包含在内
                // double quotes, otherwise append the next character
                //双引号,否则追加下一个字符
                inColum = true;
                if (character == '"')
                {
                    inQuotes = true;
                    continue;
                }
            }
            // If we are in between double quotes   如果我们处在双引号之间
            if (inQuotes)
            {
                if ((i + 1) == line.Length)//这个字符已经结束了整行
                {
                    if (character == '"')//正常转义结束,且该行已经结束
                    {
                        inQuotes = false;
                        continue;
                    }
                    else//异常结束,转义未收尾
                    {
                        isNotEnd = true;
                    }
                }
                else if (character == '"' && line[i + 1] == _csvSeparator)//结束转义,且后面有可能还有数据
                {
                    inQuotes = false;
                    inColum = false;
                    i++;//跳过下一个字符
                }
                else if (character == '"' && line[i + 1] == '"')//双引号转义
                {
                    i++;//跳过下一个字符
                }
                else if (character == '"')//双引号单独出现(这种情况实际上已经是格式错误,为了兼容暂时不处理)
                {
                    throw new System.Exception("格式错误,错误的双引号转义");
                }
                //其他情况直接跳出,后面正常添加
            }
            else if (character == _csvSeparator)
            {
                inColum = false;
            }
            // If we are no longer in the column clear the builder and add the columns to the list
            ////结束该元素时inColumn置为false,并且不处理当前字符,直接进行Add
            if (!inColum)
            {
                Fields.Add(_trimColumns ? _columnBuilder.ToString().Trim() : _columnBuilder.ToString());
                _columnBuilder.Remove(0, _columnBuilder.Length);
            }
            else//追加当前列
            {
                _columnBuilder.Append(character);
            }
        }

        // If we are still inside a column add a new one (标准格式一行结尾不需要逗号结尾,而上面for是遇到逗号才添加的,为了兼容最后还要添加一次)
        if (inColum)
        {
            if (isNotEnd)
            {
                _columnBuilder.Append("\r\n");
            }
            Fields.Add(_trimColumns ? _columnBuilder.ToString().Trim() : _columnBuilder.ToString());
        }
        else  //如果inColumn为false,说明已经添加,因为最后一个字符为分隔符,所以后面要加上一个空元素
        {
            Fields.Add("");
        }
        return Fields;
    }
    //读取文件
    public static List<List<string>> Read(string filePath, Encoding encoding)
    {
        List<List<string>> result = new List<List<string>>();
        string content = File.ReadAllText(filePath,encoding);
        string[] lines = content.Split(new string[] { "\r\n" }, StringSplitOptions.RemoveEmptyEntries);
        for (int i = 0; i < lines.Length; i++)
        {
            List<string> line = ParseLine(lines[i]);
            result.Add(line);
        }
        return result;
    }
    //写入文件
    public static void Write(string filePath, Encoding encoding, List<List<string>> result)
    {
        StringBuilder builder = new StringBuilder();
        for (int i = 0; i < result.Count; i++)
        {
            List<string> line = result[i];
            builder.Append(GetCSVFormatLine(line));
        }
        File.WriteAllText(filePath, builder.ToString(), encoding);
    }
    //打印
    public static void Debug(List<List<string>> result)
    {
        for (int i = 0; i < result.Count; i++)
        {
            List<string> line = result[i];
            for (int j = 0; j < line.Count; j++)
            {
                UnityEngine.Debug.LogWarning(line[j]);
            }
        }
    }
}

另外

关于路径有4个类型:

Application.dataPath:该路径指向我们Unity编辑器的Asset文件夹

Application.persistentDataPath:该路径指向iOS和Android的沙盒路径

Application.streamingAssetsPath:streamingAsset文件夹路径,在任何平台都可以通过这个路径读取到文件夹里的内容

Application.temporaryCachePath:临时数据文件路径

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转载自www.cnblogs.com/lingLuoChengMi/p/9990488.html