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October 10, 2015 08:40
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合并文件，可用来制作传说中的图种。运行时把文件路径当做参数传入，最后一个参数为输出文件的路径。
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| import java.io.File; | |
| import java.io.FileInputStream; | |
| import java.io.FileOutputStream; | |
| import java.io.IOException; | |
| import java.nio.channels.FileChannel; | |
| public class FileGathering { | |
| public static void main(String[] args) throws IOException { | |
| combineFiles(args); | |
| } | |
| public static void combineFiles(String[] paths) throws IOException { | |
| int pathsSize = paths.length; | |
| if (pathsSize < 2) { | |
| System.err.println("请至少输入两个文件路径"); | |
| return; | |
| } | |
| File outputFile = new File(paths[pathsSize - 1]); | |
| if (!outputFile.exists()) { | |
| outputFile.createNewFile(); | |
| } | |
| FileChannel outputFileChannel = new FileOutputStream(outputFile).getChannel(); | |
| FileChannel inFileChannel; | |
| for (int i = 0; i < pathsSize; i++) { | |
| inFileChannel = new FileInputStream(new File(paths[i])).getChannel(); | |
| inFileChannel.transferTo(0, inFileChannel.size(), outputFileChannel); | |
| inFileChannel.close(); | |
| } | |
| outputFileChannel.close(); | |
| } | |
| } |
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perfect!