Csv文件操作接口

import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;

import com.csvreader.CsvReader;
import com.wer.factories.PrintFactory;

/**
 * CSV文件处理API
 * 
 */
public class CsvParser {

	private char Seperator = ','; // CSV格式分隔符
	private String CsvPath = ""; // CSV文件路径
	private CsvReader reader;

	public CsvParser() {
		initial();
	}

	public CsvParser(String path) {
		this.CsvPath = path;
		initial();
	}

	public CsvParser(String path, char sepr) {
		this.CsvPath = path;
		this.Seperator = sepr;
		initial();
	}

	private void initial() {
		try {
			reader = new CsvReader(CsvPath, Seperator, Charset.forName("GBK"));
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	public boolean ifValid()
	{
		if(reader==null)
			return false;
		return true;
	}

	/**
	 * 获取CSV文件列头名称数组
	 * 
	 * @return String[]
	 * @throws IOException
	 **/
	public String[] getHeaders(){
		boolean result = false;
		if (reader == null)
			return null;
		try {
			result = reader.readHeaders();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			PrintFactory.getInstance().err(e.getMessage());
		}

		if(result)
			try {
				return reader.getHeaders();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				PrintFactory.getInstance().err(e.getMessage());
			}
		return null;
	}

	/**
	 * 获取CSV文件所有值列表
	 * 
	 * @return List
	 * @throws IOException
	 */
	public List getValuesList() throws IOException {
		if (reader == null)
			return null;
		List list = new ArrayList();
		while (reader.readRecord()) {
			list.add(reader.getValues());
		}

		return list;
	}

	/**
	 * 获取CSV文件所有值数组
	 * 
	 * @return String[][]
	 * @throws IOException
	 */
	public String[][] getValuesArray() throws IOException {
//		List list = getValuesList();
		try {
			List list = getValuesList();
			int size = list.size();
			if (size <= 0)
				return null;
			Object[][] data = new String[size][];
			Object[] tmp = list.get(0);
			int colsize = tmp.length;
			
			if (colsize <= 0)
				return null;
			String[][] values = new String[list.size()][colsize];
			for (int i = 0; i < list.size(); i++) {
				data[i] = list.get(i);
				
				for (int m = 0; m < colsize; m++) {
					try {
						values[i][m] = String.valueOf(data[i][m]);
					} catch (NullPointerException e) {
						// TODO: handle exception
						e.printStackTrace();
					}
				}
			}
			return values;
		} catch (IOException e) {
			// TODO: handle exception
		}
		return null;
	}

	/**
	 * 获取指定行数组
	 * 
	 * @param row
	 * @return String[]
	 * @throws IOException
	 */
	public String[] getRowData(int row) throws IOException {
		List list = getValuesList();
		if (list == null)
			return null;
		Object[] objs = list.get(row);
		if (objs == null)
			return null;
		String[] datas = new String[objs.length];
		for (int i = 0; i < objs.length; i++)
			datas[i] = objs[i].toString();

		return datas;
	}

	/**
	 * 获取指定行、列的CSV数据
	 * 
	 * @param row
	 *            从0开始
	 * @param col
	 * @return
	 * @throws IOException
	 */
	public String getCellData(int row, int col) throws IOException {
		List list = getValuesList();
		if (list == null)
			return null;
		Object[] objs = list.get(row);
		if (objs == null)
			return null;
		Object data = objs[col];
		if (data == null)
			return null;

		return data.toString();
	}
	
	/**
	 * 获取CSV列长度
	 * 
	 * @return int
	 */
	public int getColumnLength()
	{
		if (reader == null)
			return -1;
		try {
			List v = getValuesList();
			if(v.size()==0)
				return 0;
			return v.get(0).length;
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return -1;
	}

	public int getCLength() {
		if (reader == null)
			return -1;
		return reader.getColumnCount();
	}

	/**
	 * 获取数据长度
	 * 
	 * @return int
	 * @throws IOException
	 */
	public int getDataLength() throws IOException {
		List list;
		if (reader == null)
			return -1;
		if ((list = getValuesList()) != null)
			return list.size();
		return -1;
	}

	/**
	 * 根据列头名获取列索引号
	 * 
	 * @param head
	 * @return
	 * @throws IOException
	 */
	public int getColByName(String head) throws IOException {
		String[] heads = getHeaders();
		for (int i = 0; i < heads.length; i++) {
			if (heads[i].equalsIgnoreCase(head))
				return i;
		}
		return -1;
	}

	/**
	 * 获取指定序号的列头名称
	 * 
	 * @param colIndex
	 * @return String
	 * @throws IOException
	 */
	public String getHeadName(int colIndex) throws IOException {
		String[] heads = getHeaders();
		if (heads == null)
			return null;
		if (heads.length < colIndex)
			return null;
		return heads[colIndex];
	}

}