package com.zky.pub;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.fileupload.DiskFileUpload;
import org.apache.commons.fileupload.FileItem;
import org.apache.log4j.Logger;

/**
 * @author dy
 *
 */
public class FileImport {
	private Logger log = Logger.getLogger(FileImport.class);

	private String[] column;

	private String split = "\t";//默认以制表符（TAB键）间隔

	public FileImport() {
		column = new String[0];
	}

	public FileImport(String[] column) {
		this.column = column;
	}

	public FileImport(String column) {
		this.column = new String[] { column };
	}

	public FileImport(String[] column, String split) {
		this.column = column;
		this.split = split;
	}

	/**
	 * 将上传文件内容读入到一个List中 并将其他表单信息写入传入的Map中 key格式为form.xxx
	 * @param request
	 * @param p_otherParamList
	 * @return
	 * @throws Exception
	 */
	public List importSingleFileAsList(HttpServletRequest request,
		Map p_otherParamMap) throws Exception {
		List result = new ArrayList();
		String path = request.getRealPath("/temp/");
		DiskFileUpload fu = new DiskFileUpload();
		//设置允许用户上传文件大小,单位:字节
		fu.setSizeMax(10000000);
		//设置最多只允许在内存中存储的数据,单位:字节
		fu.setSizeThreshold(4096);
		//设置一旦文件大小超过getSizeThreshold()的值时数据存放在硬盘的目录
		fu.setRepositoryPath(path);
		//得到所有的文件
		List fileItems = fu.parseRequest(request);
		Iterator i = fileItems.iterator();
		while (i.hasNext()) {
			FileItem fi = (FileItem) i.next();
			//忽略其他不是文件域的所有表单信息
			if (!fi.isFormField()) {
				//获得文件名，这个文件名包括路径
				String fileName = fi.getName();
				log.debug("# upload file:" + fileName);
				if (fileName != null) {
					InputStream stream = fi.getInputStream();
					BufferedReader in = new BufferedReader(
						new InputStreamReader(stream));
					String line = "";
					while ((line = in.readLine()) != null) {
						line = line.trim();
						if (line.length() == 0) { //忽略空行
							continue;
						}
						result.add(line);
					}
				}
			} else {
				if (p_otherParamMap != null) {
					p_otherParamMap.put("form." + fi.getFieldName(), fi
						.getString());
				}
			}
		}
		if (result.size() == 0) {
			result = null;
		}
		return result;
	}

	public HashFmlBuf importSingleFile(HttpServletRequest request)
		throws Exception {
		if (column == null || column.length == 0) {
			return null;
		}
		HashFmlBuf buf = new HashFmlBuf();
		String path = request.getRealPath("/temp/");
		DiskFileUpload fu = new DiskFileUpload();
		//设置允许用户上传文件大小,单位:字节
		fu.setSizeMax(10000000);
		//设置最多只允许在内存中存储的数据,单位:字节
		fu.setSizeThreshold(4096);
		//设置一旦文件大小超过getSizeThreshold()的值时数据存放在硬盘的目录
		fu.setRepositoryPath(path);
		//得到所有的文件
		List fileItems = fu.parseRequest(request);
		Iterator i = fileItems.iterator();
		//处理文件
		while (i.hasNext()) {
			FileItem fi = (FileItem) i.next();
			//忽略其他不是文件域的所有表单信息
			if (!fi.isFormField()) {
				//获得文件名，这个文件名包括路径
				String fileName = fi.getName();
				log.debug("# upload file:" + fileName);
				if (fileName != null) {
					InputStream stream = fi.getInputStream();

					BufferedReader in = new BufferedReader(
						new InputStreamReader(stream));
					String line = "";
					String[] values = null;
					int j = 0;
					while ((line = in.readLine()) != null) {
						line = line.trim();
						if (line.length() == 0) { //忽略空行
							continue;
						}
						if (column.length > 1) {
							values = line.split(split);
							for (int k = 0; k < values.length; k++) {
								buf.fchg(column[k], j, values[k]);
							}
						} else {
							buf.fchg(column[0], j, line);
						}
						j++;
					}
					buf.fchg("rowcount", 0, Integer.toString(j));
					buf.setRowCount(j);
				}
			} else {
				buf.fchg("form." + fi.getFieldName(), 0, fi.getString());
			}
		}
		return buf;
	}

	/**
	 * @param column The column to set.
	 */
	public void setColumn(String[] column) {
		this.column = column;
	}

	/**
	 * @param split The split to set.
	 */
	public void setSplit(String split) {
		this.split = split;
	}

}