提供 IO 操作的工具类

package com.wen;

import java.io.*;

/**
 * 提供 IO 操作的工具类
 * @version 1.0
 * @author explorer
 */
public final class StreamUtil {
  /**
   * 将输入流复制到输出流
   * @param is
   * @param os
   * @throws IOException
   */
  public final static void write(InputStream is, OutputStream os) throws
      IOException {
    BufferedInputStream bis = new BufferedInputStream(is, 1024);
    int c = bis.read();
    while (c != -1) {
      os.write(c);
      c = bis.read();
    }
    os.flush();
  }

  /**
   * 将输入流按指定的编码转成字符串
   * @param is
   * @param encoding
   * @return
   * @throws IOException
   */
  public final static String toString(InputStream is, String encoding) throws
      IOException {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    write(is, bos);
    if (encoding == null) {
      return new String(bos.toByteArray());
    }
    else {
      return new String(bos.toByteArray(), encoding);
    }

  }

  /**
   * 将输入流按默认的编码转成字符串
   * @param is
   * @return
   * @throws IOException
   */
  public final static String toString(InputStream is) throws IOException {
    return toString(is, null);
  }

  /**
   * 关闭输入流，忽略异常
   * @param is
   */
  public final static void closeQuitely(InputStream is) {
    try {
      if (is != null) {
        is.close();
      }
    }
    catch (IOException e) {
    }

  }

  /**
   * 关闭输出流，忽略异常
   * @param os
   */
  public final static void closeQuitely(OutputStream os) {
    try {
      if (os != null) {
        os.close();
      }
    }
    catch (IOException e) {
    }
  }

  /**
   * 半闭输入输出流，忽略异常
   * @param is
   * @param os
   */
  public final static void closeQuitely(InputStream is, OutputStream os) {
    closeQuitely(is);
    closeQuitely(os);
  }
}