编写应用程序，使用文件输入输出流实现文件的复制，并将文件的内容打印在屏幕上，被拷贝的源文件和复制的目标文件由命令行参数给出。若没给出两个参数，则通过标准错误流打印出"本程序运行需要输入两个参数！！！"-Write applications, the use of file input and output streams for copying, and the contents of the file print on the screen, the source file is copied and the copy of the target file given by command line parameters. If two parameters are not given, through the standard error stream to print out " of the program runs two parameters need to enter!!!"