java中对流的两种操作

package com; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.FileInputStream; import java.io.FileWriter; import java.io.InputStreamReader; public class aa { public static void main(String[] args) throws Exception { FileInputStream fi = new FileInputStream("c:\\photo.sql"); //FileInputStream是按字符流读数据,而FileReader是按字节流读数据 BufferedReader br = new BufferedReader(new InputStreamReader(fi,"utf-8")); String line = br.readLine(); //BufferedWriter fs = new BufferedWriter(new FileWriter("c:\\photo2.sql")); 用BufferedWriter类必须在用FileWriter创建输出流的路径 //FileOutputStream fs = new FileOutputStream("c:\\photo2.sql");FileOutputStream就相对方便多了，直接在自己里写路径，但他向外面写数据时不能逐行写 FileWriter out = new FileWriter("c:\\photo2.sql"); BufferedWriter fs = new BufferedWriter(out); int i = 0; while (line != null) { int k = i++; if (line.indexOf("INSERT INTO") > -1&&k<300) { System.out.println(k); String line3 = line.replaceFirst("/images", "/shanxi/taiyuan/images").replace(" null);", "'4','city');"); byte[] bb = line3.getBytes(); System.out.println(line3.indexOf("null")); System.out.println(line3.indexOf("'23'")); fs.write(line3); fs.newLine();//BufferedWriter有此方法将数据分行写，但FileOutputStream只能将所有数据读成一行 fs.flush(); } else if(line.indexOf("INSERT INTO")>-1&&k<600){ System.out.println(k); String line3 = line.replaceFirst("/images", "/shanxi/images").replace(" null);", "'4','province');"); byte[] bb = line3.getBytes(); System.out.println(line3.indexOf("'23'")); fs.write(line3); fs.newLine(); fs.flush(); } else if(line.indexOf("INSERT INTO")>-1&&k<928) { System.out.println(k); String line3 = line.replace(" null);", "'','china');"); byte[] bb = line3.getBytes(); System.out.println(line3.indexOf("'23'")); fs.write(line3); fs.newLine(); fs.flush(); } line = br.readLine(); } br.close(); fs.close(); } }