package main.java;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.text.SimpleDateFormat;
import java.util.Date;

public class GenerateCsvTest {
	private static StringBuilder st = new StringBuilder();

	public static void main(String[] args) throws Exception {
		String filePath = getExportPath("Test", false);
		OutputStreamWriter osw = null;
		File exportFile = null;
		try {
			exportFile = getFile(filePath, "Test");
			osw = new OutputStreamWriter(new FileOutputStream(exportFile.getAbsoluteFile()), "UTF-8");
			writeFile(osw, "Test");
		} catch (Exception e) {
			System.out.println("Export failed exception");
			e.getStackTrace();
		} finally {
			osw.close();
			exportFile.setReadable(true, false);
		}
	}

	public static void writeFile(OutputStreamWriter osw, String fileName) throws IOException {
		osw.write('\uFEFF');
		osw.append("NO1,NO2,NO3,NO4,NO5\n");
		osw.append("1,2,3,4,5\n");
		System.out.println("写入完成！");
		System.out.println("文件名：" + getFullFileName(fileName));
	}

	// Return full Name for name
	public static String getFullFileName(String fileName) {
		String exportPath = getExportPath(fileName, false);
		return exportPath.substring(exportPath.lastIndexOf(File.separatorChar) + 1, exportPath.lastIndexOf(".")).trim();
	}

	public static String addZeroForNum(String str, int strLength) {
		int strLen = str.length();
		if (strLen < strLength) {
			while (strLen < strLength) {
				StringBuffer sb = new StringBuffer();
				sb.append("0").append(str);// 左补0
				// sb.append(str).append("0");//右补0
				str = sb.toString();
				strLen = str.length();
			}
		}
		return str;
	}

	public static String getExportPath(String fileName, boolean isRename) {
		Date date = new Date();
		String yyyy = new SimpleDateFormat("yyyy").format(date);
		String mm = new SimpleDateFormat("MM").format(date);
		String dd = new SimpleDateFormat("dd").format(date);
		String yyyyMMdd = new SimpleDateFormat("yyyyMMdd").format(date);

		if (isRename == false) {
			return yyyy + File.separatorChar + mm + File.separatorChar + dd + File.separatorChar + fileName + "_[" + yyyyMMdd + "].csv";

		} else {
			return yyyy + File.separatorChar + mm + File.separatorChar + dd + File.separatorChar + fileName + "_[" + yyyyMMdd + "]" + date.getTime()
					+ ".csv";
		}

	}

	public static File getFile(String filePath, String fileName) throws Exception {
		File file = new File(filePath.substring(0, filePath.lastIndexOf(File.separatorChar)).trim());
		if (!file.exists()) {
			file.mkdirs();
			System.out.println("路径不存在，创建中........");
		}
		File exportFile = new File(filePath);
		if (exportFile.exists()) {
			exportFile.renameTo(new File(getExportPath(fileName, true)));
			System.out.println("文件存在，更名中....");
		}
		exportFile.createNewFile();

		System.out.println("新文件创建中");
		return exportFile;
	}
}