Java读写文件文本文件的示例,这里包含了三个例子，即

* 1. 将文件读入到内存（这里是StringBuffer）的例子

* 2. 将内容中的文本写到文件

* 3. 将一个文件的内容读出来写入另一个文件中

* 同时也展示了如果从输入流中读出来内容写入输出流中（仅限文本流） -Java to read and write text files of the sample document, contains three examples here, that is* 1. To file read into memory (in this StringBuffer) examples* 2. Will write the contents of the text file* 3. Will be a file read out the contents of another file into the* displayed at the same time from the input stream to read out the content written into the output stream (only the text flow)