关于一个修改文件的问题

[naixian1983]

在txt文件下某一段储存以下内容

relation: key person
name: ken
gender: male
tel:[phone]

要求替换文件内容为:

relation: key person
name: kelly
gender: female
tel:[phone]

        String[] record = new String[100];

         int i=0;

         try
         {

             File file=new File("Family Info.txt");
             FileWriter In=new FileWriter(file,true);

             FileReader read=new FileReader(file);
             Scanner scanner=new Scanner(read);

             while(scanner.hasNextLine())
             {

                 record[i]=scanner.nextLine();
                
                 i++;
             }
                
   

             for(int a=0;a<i;a++)
             {
                 if(record[a].equals("Relation:key person"))
                 {

                     String temp[]=new String[3];


                    for(int b=a;b<a+3;b++)
                    {
                        
                       String key[]=record[b].split(":");
                       temp[b-a]=key[1];
                       

                    }
                 }
              }

怎样才能做到逐行替换文件内容？谢谢

[dinghun8leech]

一行一行读，排成所需的顺序，重新写出来。

[notlogin]

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;

public class Test {

	String newGender;
	String newName;

	String changeGender(String Gender) {
		this.newGender = Gender;
		return newGender;
	}

	String changeName(String name) {
		this.newName = name;
		return newGender;
	}
	//其他略……
	public static void main(String[] args) throws Exception {
		Test t = new Test();
		FileReader fr = new FileReader("f:\\11.txt");
		FileWriter wr = new FileWriter("f:\\22.txt");
		BufferedReader br = new BufferedReader(fr);
		String str = "";
		while (br.ready()) {
			str = br.readLine();
			if (str.indexOf("gender") != -1) {
				str = t.changeGender("gender: female");
			}
			//其他替换略
			wr.write(str + "\r\n");
		}
		wr.flush();
	}
}

[notlogin]

String changeName(String name) {
        this.newName = name;
        return newGender;
    }

笔误~~~~~~~~~应该是

String changeName(String name) {
        this.newName = name;
        return newName; //这里
    }

[ifrancis]

[Quote=引用 2 楼 notlogin 的回复:]
Java code

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;

public class Test {

String newGender;
String newName;

String changeGender(Stri……
[/Quote]顶，try catch 补上就OK了

[Ark032425]

用java.util.Properties
简单快捷

[Ark032425]

搂主看一下该类的API，比自己一行一行的读省事多了