java将一个文本的数据插入另一个文本的指定位置

Question

现在有个问题，我有一个文本，上面的数据不全，需要将另外一个文本的数据插入，以id号的顺序插入

上面的是不全的文本，下面的是需要插入的文本
最后是这样的，如果第一个文本，即不全的文本数据量比较大，还需要用上面方式来处理？

Answer 1

 package design;

import org.yaml.snakeyaml.reader.UnicodeReader;

import java.io.*;
import java.util.*;

public class ReadTxt {

    public static List<Map<String,String>> readFromLockingTxt(String fileName) {
        BufferedReader reader = null;
        List<Map<String,String>> mapList = new ArrayList<Map<String,String>>();
        try{
            FileInputStream fileInputStream = new FileInputStream(new File(fileName));
            UnicodeReader unicodeReader = new UnicodeReader(fileInputStream);
            reader = new BufferedReader(unicodeReader);
            String tempString = null;
            int line = 1;
            while ((tempString = reader.readLine()) != null) {
                Map<String,String> map = new LinkedHashMap<String,String>();
                System.out.println("line " + line + ": " + tempString);
                tempString.trim();
                if(line==1){
                    String [] strs = tempString.split("\\|");
                    map.put("id",strs[0].trim());
                    map.put("name",strs[1].trim());
                    map.put("pass",strs[2].trim());
                }else{
                    //替换多个空格
                    String string = tempString.replaceAll(" {1,}", "");
                    String [] strs = string.split(",");
                    map.put("id",strs[0].trim());
                    map.put("name",strs[1].trim());
                    if(strs.length == 3){
                        map.put("pass",strs[2].trim());
                    }else{
                        map.put("pass","");
                    }
                }
                mapList.add(map);
                line++;
            }
            reader.close();
        }catch (IOException e){
            e.printStackTrace();
        }finally {
            if (reader != null){
                try{
                    reader.close();
                }catch (IOException e1){
                    e1.printStackTrace();
                }
            }
        }
        return mapList;
    }

    public static Map<String,String> readFromKeyTxt(String fileName) {
        BufferedReader reader = null;
        Map<String,String> map = new LinkedHashMap<String,String>();
        try{
            FileInputStream fileInputStream = new FileInputStream(new File(fileName));
            UnicodeReader unicodeReader = new UnicodeReader(fileInputStream);
            reader = new BufferedReader(unicodeReader);
            String tempString = null;
            int line = 1;
            while ((tempString = reader.readLine()) != null) {
                System.out.println("line " + line + ": " + tempString);
                tempString.trim();
                //替换多个空格
                String string = tempString.replaceAll(" {1,}", "");
                String [] strs = string.split(",");
                map.put(strs[0].trim(),strs[1].trim());
                line++;
            }
            reader.close();
        }catch (IOException e){
            e.printStackTrace();
        }finally {
            if (reader != null){
                try{
                    reader.close();
                }catch (IOException e1){
                    e1.printStackTrace();
                }
            }
        }
        return map;
    }


    public static void writeListToTxt(List<Map<String,String>> list,String fileName){
        StringBuilder sb = new StringBuilder();
        for(int i=0;i<list.size();i++){
            if(i==0){
                sb.append(list.get(i).get("id")+"a\u007C"+list.get(i).get("name")+"a\u007C"+list.get(i).get("pass")).append("\r\n");
            }else{
                sb.append(list.get(i).get("id")+","+list.get(i).get("name")+","+list.get(i).get("pass")).append("\r\n");
            }
        }
        try{
            FileWriter writer = new FileWriter(fileName);
            BufferedWriter bw = new BufferedWriter(writer);
            bw.write(sb.toString());
            bw.close();
            writer.close();
        }catch(Exception e){
            e.printStackTrace();
        }

    }

    public static boolean isEmpty(String s) {
        return ((s == null) || (s.length() == 0));
    }

}

 package design;

import java.io.File;
import java.util.List;
import java.util.Map;

public class App {
    public static void main(String args[]){

        //读取缺失的文件
        List<Map<String,String>> lockMapList = ReadTxt.readFromLockingTxt("D:"+ File.separator+"workspace"+File.separator+"lacking.txt");
        System.out.println("修改前list为："+lockMapList);

        //读取补充文件
        Map<String,String> keyMap = ReadTxt.readFromKeyTxt("D:"+ File.separator+"workspace"+File.separator+"key.txt");
        System.out.println("需要插入的文本为："+keyMap);

        //组合成新的完整的list

        lockMapList.parallelStream().forEach(p->{
            if(ReadTxt.isEmpty(p.get("pass"))){
                p.replace("pass",keyMap.get(p.get("id")));
            }
        });
        System.out.println("组合后list为："+lockMapList);

        //重组完成后的List存储到txt文件
        ReadTxt.writeListToTxt(lockMapList,"D:"+ File.separator+"workspace"+File.separator+"whole.txt");
    }
}