在文件中查找单词或字符

时间:2016-01-12 15:41:18

标签: java file loops search

我正在尝试编写一个程序,该程序给出一个包含五个或更多人的姓名和地址的文件,为每个人创建一个不同的文件(字母)(新文件将被命名为将接收的人它)。 主文件的结构是这样的:

type1.0001 #n John Harrison #a Whatever Street, 490 - Liverpool
.... and so on

所以“type1”是这个人必须发送的字母类型,“#n”之后的字是名称,“#a”之后的字是地址。

我一直在尝试的是:

String datos = "main_file.txt";   
String tipo1 = "type1.txt";
String tipo2 = "type2.txt";
String tipo3 = "type3.txt";


char[] type1 = {'t', 'i', 'p', 'o', '1'};
//all other types should be here
String line;
FileReader fr = new FileReader("mainfile.txt");
BufferedReader br = new BufferedReader(fr);
while ((line = br.readLine()) != null) {
    while ((line = br.readLine()) != ".") {
        char[] lineArray = line.toCharArray();
        if (lineArray == type1) {
            //code that creates file type1

        }
    }
}

fr.close();

到目前为止,这只是决定发送哪个字母的代码,但它不起作用。 我认为这与“while”循环有关。

拜托,我1个月前开始使用Java,所以如果有人能帮助我,我会非常感激!

由于

现在,我有了这个:

    FileReader fr = new FileReader("main_file.txt");
    BufferedReader br = new BufferedReader(fr);

    while ((line = br.readLine()) != null) {
        String nameMark = "#n";
        String addressMark = "#a";

        int nameStart = line.indexOf(nameMark) + nameMark.length();
        int addressStart = line.indexOf(addressMark) + addressMark.length();
        String name = line.substring(nameStart, addressStart - addressMark.length());
        String address = line.substring(addressStart, line.length());
        if (line.startsWith("tipo1.")) {
            FileWriter fw = new FileWriter("file1.txt");
            char[] vector = name.toCharArray();
            int index = 0;
            while (index < vector.length) {
                fw.write(vector[index]);
                index++;
            }
            fw.close();
        } else if (line.startsWith("tipo2.")) {
            FileWriter fw = new FileWriter("file1.txt");
            char[] vector = name.toCharArray();
            int index = 0;
            while (index < vector.length) {
                fw.write(vector[index]);
                index++;
            }
            fw.close();

        }
    }

    fr.close();

但它不起作用。

有人能帮助我吗?

3 个答案:

答案 0 :(得分:0)

您不能将#!/usr/bin/env perl6 use v6; my @a = 1 .. 4; @a[5] = 6; my @b; for @a -> $i { @b.push( ~$i ); } say "=====\n" x 3; 与数组一起使用。 (嗯,你可以,但它不能达到你的预期。)也就是说,这一行是错误的:

==

请尝试 if (lineArray == type1)

Arrays.equals

答案 1 :(得分:0)

正如 Marc B 告诉你的那样,不要两次阅读这些行。

另外,只比较一下这行的开头,就会比你的char数组少得多。

要检索姓名和地址,您可以使用StringindexOfsubstring方法。

以下是一个完整的例子:

   while ((line = br.readLine()) != null) {

            // get the name and the address of this line
            String nameMark = "#n";
            String addressMark = "#a";

            int nameStart = line.indexOf(nameMark) + nameMark.length();
            int addressStart = line.indexOf(addressMark) + addressMark.length();

            String name = line.substring(nameStart, addressStart - addressMark.length());
            String address = line.substring(addressStart, line.length());

            // get the line type
            if (line.startsWith("tipo1")) {
                    //code that creates file type1 with name and address
            }
            else if(line.startsWith("tipo2")) {
                    //code that creates file type2 with name and address
            }
    ...
    ...
        }

答案 2 :(得分:0)

首先尝试这个。

    String line;
    FileReader fr = new FileReader("mainfile.txt");
    BufferedReader br = new BufferedReader(fr);
    while ((line = br.readLine()) != null) { // finish when line is null not "."

        String [] parts = line.split("#");

        String name, address;
        if (parts.length > 2) {
            name = parts[1].substring(2);
            address = parts[2].substring(2);
        }

        if (line.startsWith("tipo1")) {
            // save to tipo1 file
        } else if (line.startsWith("tipo2")) {
            // save to tipo2 file
        } else if (line.startsWith("tipo2")) {
            // save to tipo2 file
        } else if (line.startsWith("tipo3")) {
            // save to tipo2 file
        } else if (line.startsWith("tipo4")) {
            // save to tipo2 file
        } else if (line.startsWith("tipo2")) {
            // save to tipo2 file
        }
    }

    fr.close();