JAVA功能代码《2》----向文件中写入文本

BufferedWriter out = null;
try {
out = new BufferedWriter(new FileWriter("filename", true));
out.write("aString");
} catch (IOException e) {
// 　error　processing　code　　　
} finally {
if (out != null) {
try {
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}