IOUtils.java

package xyz.yhsj.yhutils.io;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

import android.content.Context;

/**
 * IO流 工具类<br>
 * 很简单,仅支持文本操作
 * 
 */
public class IOUtils {

	/**
	 * 文本的写入操作
	 * 
	 * @param filePath
	 *            文件路径。一定要加上文件名字 <br>
	 *            例如：../a/a.txt
	 * @param content
	 *            写入内容
	 * @param append
	 *            是否追加
	 */
	public static void write(String filePath, String content, boolean append) {
		BufferedWriter bufw = null;
		try {
			bufw = new BufferedWriter(new OutputStreamWriter(
					new FileOutputStream(filePath, append)));
			bufw.write(content);

		} catch (Exception e1) {
			e1.printStackTrace();
		} finally {
			if (bufw != null) {
				try {
					bufw.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
	}

	/**
	 * 文本的读取操作
	 * 
	 * @param path
	 *            文件路径,一定要加上文件名字<br>
	 *            例如：../a/a.txt
	 * @return
	 */
	public static String read(String path) {
		BufferedReader bufr = null;
		try {
			bufr = new BufferedReader(new InputStreamReader(
					new FileInputStream(path)));
			StringBuffer sb = new StringBuffer();
			String str = null;
			while ((str = bufr.readLine()) != null) {
				sb.append(str);
			}
			return sb.toString();
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (bufr != null) {
				try {
					bufr.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return null;
	}

	/**
	 * 文本的读取操作
	 * 
	 * @param is 输入流
	 * @return
	 */
	public static String read(InputStream is) {
		BufferedReader bufr = null;
		try {
			bufr = new BufferedReader(new InputStreamReader(is));
			StringBuffer sb = new StringBuffer();
			String str = null;
			while ((str = bufr.readLine()) != null) {
				sb.append(str);
			}
			return sb.toString();
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (bufr != null) {
				try {
					bufr.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return null;
	}

	
	/**
	 * @param context 上下文
	 * @param fileName 文件名
	 * @return 字节数组
	 */
	public static byte[] readBytes(Context context, String fileName) {
		FileInputStream fin = null;
		byte[] buffer = null;
		try {
			fin = context.openFileInput(fileName);
			int length = fin.available();
			buffer = new byte[length];
			fin.read(buffer);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				if (fin != null) {
					fin.close();
					fin = null;
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return buffer;
	}
	
	/**
	 * 快速读取程序应用包下的文件内容
	 * 
	 * @param context
	 *            上下文
	 * @param filename
	 *            文件名称
	 * @return 文件内容
	 * @throws IOException
	 */
	public static String read(Context context, String filename)
			throws IOException {
		FileInputStream inStream = context.openFileInput(filename);
		ByteArrayOutputStream outStream = new ByteArrayOutputStream();
		byte[] buffer = new byte[1024];
		int len = 0;
		while ((len = inStream.read(buffer)) != -1) {
			outStream.write(buffer, 0, len);
		}
		byte[] data = outStream.toByteArray();
		return new String(data);
	}

	
}