BufferedWriter与BufferedRead --------------------------Test

package com.test;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
/**
 * 将文档中每一行的男转为女，需要注意要读取的文件的编码格式与java文件的编码格式相同
 * @author Administrator
 *
 */
public class Demo2 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub

        Read read = new Read();
        read.readWrite();
    }

}

class Read {
    public static void readWrite() {
        
        
        BufferedReader bufferedReader = null;
        BufferedWriter bufferedWriter = null;
        try {
            //找到要进行转换的文件
            File file = new File("D://userMsg//userinfo.txt");
            //建立读取数据通道
            FileReader fileReader = new FileReader(file);
            bufferedReader = new BufferedReader(fileReader);
            String str = null;
            //保存读取道德内容   输入流
            List<String> list = new ArrayList<String>();
            while ((str = bufferedReader.readLine()) != null) {
                //进行男女转换
                System.out.println(str);
                String s = str.replaceAll("男", "女");
                list.add(s);
            }
            //建立写入数据通道     输出流
            FileWriter fileWriter = new FileWriter(file);
            bufferedWriter = new BufferedWriter(fileWriter);
            //遍历集合
            for (String s : list) {
                bufferedWriter.write(s);
                System.out.println(s);
            }
            //流冲刷，如果缺少，可能导致写入不成功
            bufferedWriter.flush();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            //关闭流
            if (bufferedWriter != null) {
                try {
                    bufferedWriter.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } finally {
                    if (bufferedReader != null) {
                        try {
                            bufferedReader.close();
                        } catch (IOException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                    }
                }
            }
        }

    }
}