java从大文本.txt中读取两个字段，并写入另一个.txt中

Question

需求如下：aaa1,aaa2...这一类代表的是名字，bbb1...代表是生日，ccc1....表示性别，现在需要讲aaa1...表示名字和ccc1这些表示性别的读出来，放入另一个.txt中
读取之前数据如下他们各个表示的类型有---
读取之后
读取后变为由“，”分隔，读取的.txt文本比较大如果java堆栈不够，能不能分批读取完，再写入新.txt
能不能给我一段代码，谢谢了

Answer 1

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class TestFile {

    public static void main(String[] args) throws Exception {
        File file = new File("C:\\Users\\Administrator\\Desktop\\新建文本文档.txt");
        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(new File("C:\\Users\\Administrator\\Desktop\\新建文本文档1.txt")),"UTF-8"));
        BufferedInputStream inputStream = new BufferedInputStream(new FileInputStream(file));
        BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream),5*1024*1024);
        String line = null;
        while((line = reader.readLine()) != null) {//逐行的读
            String[] infoArraay = line.split("---");
            String str = "";
            for (int i = 0; i < infoArraay.length; i++) {
                str = infoArraay[0]+","+infoArraay[2];
            }
            writer.write(str);
            writer.newLine();
        }
        reader.close();
        writer.close();
    }
}

你得按照你需求来啊