文件的读写java中的流

public class IdUtil {public static String getId() throws Exception{BufferedReader br = new BufferedReader(new FileReader("src/cn/itcast/xml/example3/ui/id.txt"));String id = br.readLine();//"2011100801"(字符串)int temp = Integer.parseInt(id)+1;//2011100802(int型)BufferedWriter bw = new BufferedWriter(new FileWriter("src/example3/ui/id.txt"));bw.write(temp+"");bw.flush();bw.close();return id;}}