如何使用缓冲读取器在文件中搜索字符串

时间:2013-07-04 14:43:35

标签: java swing

如何让程序搜索文件中的字符串,然后打印出该行? 我要做的是创建一个地址簿类型的东西。如果我的代码很乱,我很抱歉,因为这是我以前第一次这样做。 HashMap会对这种事情更好吗?如果可以,可以将多个值附加到同一个键上?

public class contats extends JFrame {
    JLabel nameLabel;
    JLabel phoneLabel;
    JLabel notesLabel;
    JLabel searchLabel;
    JTextField name;
    JTextField phone;
    JTextField notes;
    JTextField searchField;
    JButton add;
    JButton search;

        public contats() {
        setLayout(new FlowLayout());

        nameLabel = new JLabel("Name: ");
        add(nameLabel);

        name = new JTextField(15);
        add(name);

        phoneLabel = new JLabel("Number: ");
        add(phoneLabel);

        phone = new JTextField(15);
        add(phone);

        notesLabel = new JLabel("Notes: ");
        add(notesLabel);

        notes = new JTextField(10);
        add(notes);

        add = new JButton("Add Contact");
        add(add);

        searchLabel = new JLabel("search");
        add(searchLabel);

        searchField = new JTextField(15);
        add(searchField);

        search = new JButton("Search");
        add(search);

        event e = new event();
        add.addActionListener(e);
        search.addActionListener(e);


    }

       public class event implements ActionListener{
        public void actionPerformed(ActionEvent e) {
        if (e.getSource() == add){
            try {
                String[] con = {name.getText(),phone.getText(),notes.getText()};
                BufferedWriter bw = new BufferedWriter(new FileWriter("peewee.txt", true));
                for(String s : con){
                    bw.newLine();
                    bw.write(s);
                }
                bw.close();

            }catch(Exception ex){
                JOptionPane.showMessageDialog(null,  "blerr");
            }

        } else if(e.getSource() == search){
            try{
                String input = search.getText();
                String file;
                String searchArray[];

                BufferedReader br = new BufferedReader(new FileReader ("peewee.txt"));
                while((file = br.readLine())!= null){ // this is where i need the help??
                    if(file == input){
                    System.out.println(input);  
                    }
                }
                br.close();

            } catch(Exception ex) {
                JOptionPane.showMessageDialog(null, "sdfadsfsdf");

            }
        }
    }

}

    public static void main(String[] args) {
        contats gui = new contats();
        gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        gui.setSize(300, 300);
        gui.setTitle("Cobtacts");
        gui.setVisible(true);



    }
}

1 个答案:

答案 0 :(得分:1)

使用

更好,更好,更快,可能是一个想法

  • 您的描述,代码发布时谈论了多个搜索字段(JTextField),然后将文件读取到DefaultTableModel并使用built_in RowFilter in JTable,(此点的所有部分都被多次询问和回答这里),然后有可能连续搜索两个或更多JTextField(需要一点点努力)