利用org.apache.commons.io.FileUtils快速读写文件

利用org.apache.commons.io.FileUtils快速读写文件
String fileName = "C://11.txt";
File file = new File(fileName);
String fileContent = "";
try {
fileContent = org.apache.commons.io.FileUtils.readFileToString(file, "GBK");
} catch (IOException e) {
e.printStackTrace();
}
fileContent +="Helloworld";
try {
org.apache.commons.io.FileUtils.writeStringToFile(file, fileContent, "GBK");
} catch (IOException e) {
e.printStackTrace();
}