Here you can find the source of copyFile(String srcFile, String dstFile)
public static final void copyFile(String srcFile, String dstFile) throws IOException
//package com.java2s; /* org.agiso.core.lang.util.FileUtils (11-02-2014) * //from w ww . j ava2 s.c o m * FileUtils.java * * Copyright 2014 agiso.org * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; public class Main { public static final void copyFile(String srcFile, String dstFile) throws IOException { copyFile(new File(srcFile), new File(dstFile)); } public static final void copyFile(File srcFile, File dstFile) throws IOException { InputStream is = null; try { is = new FileInputStream(srcFile); copyFile(is, dstFile); } finally { if (is != null) { try { is.close(); } catch (Exception e) { throw new RuntimeException(e); } } } } public static final void copyFile(InputStream is, File dstFile) throws IOException { OutputStream os = null; try { os = new FileOutputStream(dstFile); int len; byte[] buf = new byte[1024]; while ((len = is.read(buf)) > 0) { os.write(buf, 0, len); } } finally { if (os != null) { try { os.flush(); os.close(); } catch (Exception e) { throw new RuntimeException(e); } } } } }