简单的文件读写例子
public class ReadWriteFile {public static String readFile(File file){String line = null;FileReader reader = null;String content = "";try {reader = new FileReader(file);BufferedReader bufread = new BufferedReader(reader);while ((line = bufread.readLine()) != null) {content += line;}}catch (IOException e) {e.printStackTrace();}finally {if (reader != null) {try {reader.close();}catch (IOException e) {e.printStackTrace();}}}return content;}public static void writeFile(File file, String newStr){BufferedWriter writer = null;try {writer = new BufferedWriter(new FileWriter(file));writer.write(newStr);}catch (Exception e) {e.printStackTrace();}finally {try {if (writer != null) {writer.close();}}catch (IOException e) {e.printStackTrace();}}}}