文件内容替换

import java.io.*;

public class T {

    public static void main(String[] args) {
        try {
            String a = "D:\\.ftl";
            BufferedReader bufReader = new BufferedReader(new InputStreamReader(new FileInputStream(new File(a))));//数据流读取文件

            StringBuffer strBuffer = new StringBuffer();
            String empty = "";
            String tihuan = "";
            int dd = 37;
            for (String temp = null; (temp = bufReader.readLine()) != null; temp = null) {
                System.out.println(temp);
                System.out.println("---------------------------");
                if (temp.indexOf("yanyan") != -1) { //判断当前行是否存在想要替换掉的字符 -1表示存在

                    int i = temp.indexOf("yanyan");
                    tihuan = temp.substring(i, i + 6);
                    empty = "id="a" + dd + "" name="a" + dd + "" value="${scData.a" + dd + "!''}"";
                    temp = temp.replace(tihuan, empty);//替换为你想要的东东
                    System.out.println(temp);
                    dd++;
                }
                strBuffer.append(temp);
                strBuffer.append(System.getProperty("line.separator"));//行与行之间的分割
            }
            bufReader.close();
            PrintWriter printWriter = new PrintWriter("D:/EntNatureDistributionDAO.txt");//替换后输出的文件位置
            printWriter.write(strBuffer.toString().toCharArray());
            printWriter.flush();
            printWriter.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }


}