Question

java 读本地TXT文件，存入内存（不要输出到控制台），然后再生TXT2文件，并写入读的内容

要读每行数据 写出每行数据 谁能写个大致代码，路径什么的随便填 谢谢大神了

Answer 1

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.List;


public class Test
{
    static List<String> list = new ArrayList<String>();
    public static void main(String[] args)
    {
         String readFilePath = "D:\\test.txt";
         String writeFilePath = "D:\\test1.txt";
         readTxtFile(readFilePath);
         writeTxtFile(writeFilePath,list);
    }
    
    /**
     * 导出到文件
     * @param list2
     */
    public static void writeTxtFile(String writeFilePath, List<String> list2)
    {
        FileOutputStream fs;
        try
        {
            fs = new FileOutputStream(new File(writeFilePath));
            PrintStream p = new PrintStream(fs);
            for(String str:list)
            {
                p.println(str);
            }
            p.close();
        }
        catch (FileNotFoundException e)
        {
            e.printStackTrace();
        }
    }

    /**
     * 导入到内存
     * @param filePath
     */
    public static void readTxtFile(String readFilePath)
    {
        try
        {
            String encoding = "GBK";
            File file = new File(readFilePath);
            if (file.isFile() && file.exists())
            { // 判断文件是否存在
                InputStreamReader read = new InputStreamReader(
                        new FileInputStream(file), encoding);// 考虑到编码格式
                BufferedReader bufferedReader = new BufferedReader(read);
                String lineTxt = null;
                while ((lineTxt = bufferedReader.readLine()) != null)
                {
                    list.add(lineTxt);
                }
                read.close();
            }
            else
            {
                System.out.println("找不到指定的文件");
            }
        }
        catch (Exception e)
        {
            System.out.println("读取文件内容出错");
            e.printStackTrace();
        }
    }
}