createcsvfile.java

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package org.xk.util;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class CreateCSVFile {

	private static CreateCSVFile _createCSVFile = null;
	private FileOutputStream _fos = null;
	private StringBuffer _sBuffer = null;
	private String _path = "";

	public static final String DEL_CHAR = ",";
	public static final String AV_CHAR = "\"";

	public CreateCSVFile() {
		_path = "D:\\\\StudentScore.csv";
		this.init(_path);
	}

	/**
	 * 
	 * @param path
	 *            create csv file's path
	 */
	public void init(String path) {
		String method = "createCSVFile_init";

		if (path == null || path.trim().equals("")) {
			_path = "D:\\\\StudentScore.csv";
		} else {
			_path = path;
		}
		try {
			_fos = new FileOutputStream(_path, false);
			_sBuffer = new StringBuffer();
			System.out.println("create csv file sccuessful");
		} catch (FileNotFoundException e) {
			e.printStackTrace();
			System.out.println("not found exception of create csv file");
		}
	}

	/**
	 * this method is append date in csv file
	 * 
	 * @param data
	 */
	public void setData(Object data) {
		_sBuffer.append(AV_CHAR);
		_sBuffer.append(data);
		_sBuffer.append(AV_CHAR);
		_sBuffer.append(DEL_CHAR);
	}

	public void writeLine() {
		if (_sBuffer.charAt(_sBuffer.length() - 1) == ',')
			_sBuffer.delete(_sBuffer.length() - 1, _sBuffer.length());
		_sBuffer.append("\r\n");
	}

	/**
	 * this method is close fileoutputstream
	 */
	public void close() {
		String method = "close";
		try {
			if (_sBuffer != null) {
				_fos.write(_sBuffer.toString().getBytes());
				System.out.println("close fileOutputStream successful");
			} else {
				System.out.println("null point exception");
			}
		} catch (IOException e) {
			System.out.println("close fileOutputStream failure");
		} finally {
			try {
				if (_fos != null) {
					_fos.close();
					_fos = null;
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
}