Java实现替换文本内容(转载)

import java.io.*;

public class replace {

    //目标文件路径
    private static String path ="D:\\workplace\\data\\replaceSpace\\scsmcs.sql";

    //创建目标文件
    private static File file = new File(path);

    public static void alterStringInNewFileReturnFile(String oldString,
                                                      String newString){
        try {
            long start = System.currentTimeMillis();
            //创建临时文件
            File newFile = new File("src/临时文件");
            if(!newFile.exists()){
                newFile.createNewFile();
            }
            //创建随机文件流
            RandomAccessFile raf = new RandomAccessFile(file, "rw");
            //创建对临时文件缓存输出流
            BufferedWriter bw_NewFile = new BufferedWriter(
                    new OutputStreamWriter(
                            new FileOutputStream(newFile,true)));
            String string ; //存储读取内容
            long lastPoint = raf.getFilePointer(); //记录每次读取位置
            long point = 0; //记录第一次包含目标字符串位置
            int sum = 0; //记录包含目标字符串次数
            boolean flag = false; //判断是否是目标字符之后内容
            while ((string = raf.readLine()) != null){
                //随机文件流读取的时候会将GBK格式转为ISO-8859-1，
                //将读取的内容转回本地格式
                string = new String(string.getBytes("ISO-8859-1"));
                //判断是否包含目标字符
                if(string.contains(oldString)){
                    if(sum == 0)
                        point = lastPoint;
                    string = new String(
                            string.replace(oldString, newString));
                    bw_NewFile.write(string);
                    bw_NewFile.newLine();
                    sum++;
                    flag = true;
                } else if (flag){
                    bw_NewFile.write(string);
                    bw_NewFile.newLine();
                } else {
                    lastPoint = raf.getFilePointer();
                }
            }
            bw_NewFile.close();
            BufferedReader br_NewFile = new BufferedReader(
                    new InputStreamReader(
                            new FileInputStream(newFile)));
            raf.seek(point);
            while((string = br_NewFile.readLine()) != null){
                string = string +"\r\n";
                raf.write(string.getBytes());
            }
            br_NewFile.close();
            raf.close();
            newFile.delete();
            long time = System.currentTimeMillis() - start;
            System.out.println(sum+"个"+oldString
                    +"替换成"+newString+"耗费时间:"+time);
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }
    public static void main(String[] args){

         String oldString ;
         String newString ;

         oldString = "/*END*/";
         newString = "/*%end*/";
        alterStringInNewFileReturnFile(oldString,newString);

         oldString = "/*IF";
         newString = "/*%if*/";
        alterStringInNewFileReturnFile(oldString,newString);

         oldString = "dto.eikbn";
         newString = "/*dto.getForm().getEikbn()*/";
        alterStringInNewFileReturnFile(oldString,newString);

         oldString = "/*dto.key1*/";
         newString = "/*dto.geyKey1()*/";
        alterStringInNewFileReturnFile(oldString,newString);

         oldString = "/*dto.where1*/";
         newString = "/*dto.getWhere1()*/";
        alterStringInNewFileReturnFile(oldString,newString);

    }
}