java使用文本框模糊查询_教你如何用Java做模糊查询结果

import java.io.*;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.event.*;

import javax.swing.filechooser.*;

import java.util.*;

import java.util.regex.*;

//模糊查询

public class Media

{

public static void main(String args[])

{

JFrame frame=new MediaFrame();

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setVisible(true);

}

}

class MediaFrame extends JFrame implements ActionListener,ListSelectionListener

{

private JList list;

private DefaultListModel m;

private JButton btn;

private JButton btn1;

private JButton btn2;

private JButton btn3;

private JButton btn4;

private JFileChooser chooser;

private JTextField textField;

Map hashtable=new Hashtable();

private int i=0;

int s=0;

public MediaFrame()

{

setTitle("Media");

setSize(600,500);

JMenuBar menu=new JMenuBar();

setJMenuBar(menu);

JLabel label=new JLabel("查询的歌曲名:");

textField=new JTextField();

menu.add(label);

menu.add(textField);

JToolBar TB=new JToolBar();

m=new DefaultListModel();

list=new JList(m);

list.setFixedCellWidth(100);

list.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);

list.addListSelectionListener(this);

JScrollPane pane=new JScrollPane(list);

chooser=new JFileChooser();

btn=new JButton("添加歌曲");

btn.addActionListener(this);

btn1=new JButton("删除歌曲");

btn1.addActionListener(this);

btn2=new JButton("清空列表");

btn2.addActionListener(this);

btn3=new JButton("查找曲目");

btn3.addActionListener(this);

btn4=new JButton("排序");

btn4.addActionListener(this);

JPanel panel=new JPanel();

panel.setLayout(new GridLayout(5,1));

panel.add(btn);

panel.add(btn1);

panel.add(btn2);

panel.add(btn3);

panel.add(btn4);

TB.setLayout(new GridLayout(1,2));

TB.add(pane);

TB.add(panel);

add(TB,BorderLayout.WEST);

}

public void actionPerformed(ActionEvent event)

{

if (event.getSource()==btn)

{

i++;

chooser.setCurrentDirectory(new File("."));

int result=chooser.showOpenDialog(MediaFrame.this);

if (result==JFileChooser.APPROVE_OPTION)

{

System.out.println(i);

String name=chooser.getSelectedFile().getPath();

String str1=name;

int str2=name.lastIndexOf("//");

String name1=name.substring(str2+1,str1.length());

//截取最后一个"/"之前的所有字符串

int str3=name1.lastIndexOf(".");

String name2=name1.substring(0,str3);

//截取"."后面所有字符串后缀

hashtable.put(i,name2);

m.add(0,hashtable.get(i));

System.out.println(hashtable);

}

}

if (event.getSource()==btn1)

{

m.removeElement(list.getSelectedValue());

System.out.println(m);

}

if (event.getSource()==btn2)

{

System.out.println(m);

i=0;

hashtable.clear();

m.clear();

}

if (event.getSource()==btn3)

{

int [] a=new int[m.getSize()];

try

{

int j;

String name=textField.getText();

System.out.println(m.getSize());

for (j=1;j<=m.getSize();j++)

{

Pattern p=Pattern.compile("^"+name+"+");//正则表达式选取以你填的单词为首的所有查询结果

Matcher match=p.matcher((String)hashtable.get(j));

if (match.find())

{

s++;

//记录索引结点到数组中a[]中

a[s]=a[s]+m.getSize()-j;

System.out.println(hashtable.get(j));

System.out.println(a[s]);

}

}

//可以选择不多个选项(因为前面设置了JList可以多项选择)

list.setSelectedIndices(a);

}

catch (Exception e)

{

}

}

if (event.getSource()==btn4)

{

//int j;

//for (j=0;j

//{

//if (hashtable.containsValue(Integer.parseInt(j)+"*")

//hashtable.put(j,

//}

}

}

public void valueChanged(ListSelectionEvent event)

{

System.out.println(list.getSelectedIndex());

}

}