08、Map映射集合实现省市级联选择框

运行效果图：

BackgroundPanel类，设置背景中的图片添加，大小，布局

package com.lzw;

import java.awt.Graphics;
import java.awt.Image;

import javax.swing.JPanel;

/**
 * 带背景的面板组件
 * 
 * @author ZhongWei Lee
 */
public class BackgroundPanel extends JPanel {

	/**
	 * 背景图片
	 */
	private Image image;

	/**
	 * 构造方法
	 */
	public BackgroundPanel() {
		super();
		//、允许底层像素透视出来，也就是允许背景图片显示
		setOpaque(false);
		setLayout(null);
	}

	/**
	 * 设置图片的方法
	 */
	public void setImage(Image image) {
		this.image = image;
	}

	@Override
	protected void paintComponent(Graphics g) {// 重写绘制组件外观
		if (image != null) {
			int width = getWidth();// 获取组件大小
			int height = getHeight();
			//图像改变是重绘组件，和当前改变的结果相同
			g.drawImage(image, 0, 0, width, height, this);// 绘制图片与组件大小相同
		}
		super.paintComponent(g);// 执行超类方法
	}
}

CityMap类，创建并初始化Map，添加城市对应信息

package com.lzw;

import java.util.LinkedHashMap;
import java.util.Map;

public class CityMap {
    /**
     * 全国（省，直辖市，自治区）映射集合
     */
    public static Map<String,String[]> model=new LinkedHashMap<String, String[]>();
    static{
        model.put("北京", new String[]{"北京"});
        model.put("上海", new String[]{"上海"});
        model.put("天津", new String[]{"天津"});
        model.put("重庆", new String[]{"重庆"});
        model.put("黑龙江", new String[]{"哈尔滨","齐齐哈尔","牡丹江","大庆","伊春","双鸭山","鹤岗","鸡西","佳木斯","七台河","黑河","绥化","大兴安岭"});
        model.put("吉林", new String[]{"长春","延边","吉林","白山","白城","四平","松原","辽源","大安","通化"});
        model.put("辽宁", new String[]{"沈阳","大连","葫芦岛","旅顺","本溪","抚顺","铁岭","辽阳","营口","阜新","朝阳","锦州","丹东","鞍山"});
        model.put("内蒙古", new String[]{"呼和浩特","呼伦贝尔","锡林浩特","包头","赤峰","海拉尔","乌海","鄂尔多斯","通辽"});
        model.put("河北", new String[]{"石家庄","唐山","张家口","廊坊","邢台","邯郸","沧州","衡水","承德","保定","秦皇岛"});
        model.put("河南", new String[]{"郑州","开封","洛阳","平顶山","焦作","鹤壁","新乡","安阳","濮阳","许昌","漯河","三门峡","南阳","商丘","信阳","周口","驻马店"});
        model.put("山东", new String[]{"济南","青岛","淄博","威海","曲阜","临沂","烟台","枣庄","聊城","济宁","菏泽","泰安","日照","东营","德州","滨州","莱芜","潍坊"});
        model.put("山西", new String[]{"太原","阳泉","晋城","晋中","临汾","运城","长治","朔州","忻州","大同","吕梁"});
        model.put("江苏", new String[]{"南京","苏州","昆山","南通","太仓","吴县","徐州","宜兴","镇江","淮安","常熟","盐城","泰州","无锡","连云港","扬州","常州","宿迁"});
        model.put("安徽", new String[]{"合肥","巢湖","蚌埠","安庆","六安","滁州","马鞍山","阜阳","宣城","铜陵","淮北","芜湖","毫州","宿州","淮南","池州"});
        model.put("陕西", new String[]{"西安","韩城","安康","汉中","宝鸡","咸阳","榆林","渭南","商洛","铜川","延安"});
        model.put("宁夏", new String[]{"银川","固原","中卫","石嘴山","吴忠"});
        model.put("甘肃", new String[]{"兰州","白银","庆阳","酒泉","天水","武威","张掖","甘南","临夏","平凉","定西","金昌"});
        model.put("青海", new String[]{"西宁","海北","海西","黄南","果洛","玉树","海东","海南"});
        model.put("湖北", new String[]{"武汉","宜昌","黄冈","恩施","荆州","神农架","十堰","咸宁","襄樊","孝感","随州","黄石","荆门","鄂州"});
        model.put("湖南", new String[]{"长沙","邵阳","常德","郴州","吉首","株洲","娄底","湘潭","益阳","永州","岳阳","衡阳","怀化","韶山","张家界"});
        model.put("浙江", new String[]{"杭州","湖州","金华","宁波","丽水","绍兴","雁荡山","衢州","嘉兴","台州","舟山","温州"});
        model.put("江西", new String[]{"南昌","萍乡","九江","上饶","抚州","吉安","鹰潭","宜春","新余","景德镇","赣州"});
        model.put("福建", new String[]{"福州","厦门","龙岩","南平","宁德","莆田","泉州","三明","漳州"});
        model.put("贵州", new String[]{"贵阳","安顺","赤水","遵义","铜仁","六盘水","毕节","凯里","都匀"});
        model.put("四川", new String[]{"成都","泸州","内江","凉山","阿坝","巴中","广元","乐山","绵阳","德阳","攀枝花","雅安","宜宾","自贡","甘孜州","达州","资阳","广安","遂宁","眉山","南充"});
        model.put("广东", new String[]{"广州","深圳","潮州","韶关","湛江","惠州","清远","东莞","江门","茂名","肇庆","汕尾","河源","揭阳","梅州","中山","德庆","阳江","云浮","珠海","汕头","佛山"});
        model.put("广西", new String[]{"南宁","桂林","阳朔","柳州","梧州","玉林","桂平","贺州","钦州","贵港","防城港","百色","北海","河池","来宾","崇左"});
        model.put("云南", new String[]{"昆明","保山","楚雄","德宏","红河","临沧","怒江","曲靖","思茅","文山","玉溪","昭通","丽江","大理"});
        model.put("海南", new String[]{"海口","三亚","儋州","琼山","通什","文昌"});
        model.put("新疆", new String[]{"乌鲁木齐","阿勒泰","阿克苏","昌吉","哈密","和田","喀什","克拉玛依","石河子","塔城","库尔勒","吐鲁番","伊宁"});
    }
}

MainFrame类，主窗体类添加各个组件

package com.lzw;

import java.awt.Color;
import java.awt.EventQueue;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.math.BigDecimal;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

import javax.swing.DefaultComboBoxModel;
import javax.swing.JButton;
import javax.swing.JComboBox;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.UIManager;
import javax.swing.border.EtchedBorder;
import javax.swing.border.LineBorder;
import javax.swing.border.TitledBorder;
import com.lzw.BackgroundPanel;
import com.swtdesigner.SwingResourceManager;

public class MainFrame extends JFrame {

	private JTextField textField_3;
	private JTextField textField_1;
	private JComboBox comboBox_1;
	private JTextField textField;
	private JComboBox cityComboBox;
	private JComboBox comboBox;

	/**
	 * Launch the application
	 * 
	 * @param args
	 */
	public static void main(String args[]) {
		/**
		 * 设置窗口显示风格，并且保证线程安全
		 */
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
					MainFrame frame = new MainFrame();
					frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	/**
	 * Create the frame
	 */
	public MainFrame() {
		getContentPane().setLayout(null);
		//、设置最大容器的位置和大小
		setBounds(100, 100, 518, 379);
		//、当窗口被关闭时进程关闭
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		//、获取第一个省直辖市
		String province=(String)getProvince()[0];
		setTitle("输入指定省/直辖市查询对应的市县");

		//、背景容器是不可变的
		final BackgroundPanel backgroundPanel = new BackgroundPanel();
		//、将背景图片添加到容器底部
		backgroundPanel.setImage(SwingResourceManager.getImage(MainFrame.class, "/images/background2.jpg"));
		backgroundPanel.setBounds(0, 0, 510, 380);
		//、两者是等价的，都是讲容器添加到框架中
		//getContentPane().add(backgroundPanel);                      
		setContentPane(backgroundPanel);

		final JPanel panel = new JPanel();
		//false不绘制部分或所有边界像素，也就是允许底层像素透视出来
		panel.setOpaque(false);
		panel.setBounds(36, 126, 438, 70);
		backgroundPanel.add(panel);
		panel.setLayout(null);
		/**
		 * 设置组合容器，第一个参数为边界，
		 * 		       第二个参数为标题
		 * 			第三个参数为标题显示格式，居中还是居左等
		 * 			第四个参数为标题位置，上部、下部、左部等
		 * 			第五个参数为字体
		 * 			第六个参数为颜色，new Color(参数1，参数2，参数3)
		 * 			各个参数分别为红色、绿色、蓝色
		 */
		panel.setBorder(new TitledBorder(null, "居住地", TitledBorder.DEFAULT_JUSTIFICATION, TitledBorder.DEFAULT_POSITION, null, null));
		
		//、创建城市下拉框，由文本输入框和下拉框组成
		cityComboBox = new JComboBox();
		cityComboBox.setBounds(245, 25, 124, 27);
		//、添加到容器panel中
		panel.add(cityComboBox);
		//、添加城市信息
		cityComboBox.setModel(new DefaultComboBoxModel(getCity(province)));

		//、创建省份下拉框
		comboBox = new JComboBox();
		comboBox.setBounds(25, 25, 124, 27);
		panel.add(comboBox);
		// 、选项状态更改事件，即根据省/直辖市在下拉列表中选择对应的市/县
		comboBox.addItemListener(new ItemListener() {
			public void itemStateChanged(final ItemEvent e) { 
				itemChange();
			}
		});
		comboBox.setModel(new DefaultComboBoxModel(getProvince())); // 添加省份信息

		//、创建省份标签
		final JLabel label = new JLabel();
		label.setText("省/直辖市");
		label.setBounds(155, 30, 66, 18);
		panel.add(label);

		//、创建城市标签
		final JLabel label_1 = new JLabel();
		label_1.setText("市/县");
		label_1.setBounds(375, 30, 37, 18);
		panel.add(label_1);

		//、创建姓名标签
		final JLabel label_2 = new JLabel();
		label_2.setBounds(36, 43, 65, 18);
		backgroundPanel.add(label_2);
		//、设置姓名标签沿X轴对齐方式，为右
		label_2.setHorizontalAlignment(SwingConstants.RIGHT);
		//、设置标签的文本相对于其图像的水平位置，水平间距
		label_2.setHorizontalTextPosition(SwingConstants.LEADING);
		label_2.setText("姓    名：");

		//、创建姓名文本框
		textField = new JTextField();
		textField.setBounds(113, 38, 154, 28);
		backgroundPanel.add(textField);

		//、创建性别标签
		final JLabel label_3 = new JLabel();
		label_3.setBounds(36, 84, 65, 18);
		backgroundPanel.add(label_3);
		label_3.setHorizontalAlignment(SwingConstants.RIGHT);
		label_3.setHorizontalTextPosition(SwingConstants.LEADING);
		label_3.setText("性    别：");

		//、创建选择性别的下拉框
		comboBox_1 = new JComboBox();
		comboBox_1.setBounds(113, 81, 66, 25);
		backgroundPanel.add(comboBox_1);
		//、性别下拉框只有两种默认值，男或者女
		comboBox_1.setModel(new DefaultComboBoxModel(new String[] {"男", "女"}));

		//、创建详细地址标签
		final JLabel label_4 = new JLabel();
		label_4.setBounds(36, 212, 65, 18);
		backgroundPanel.add(label_4);
		label_4.setHorizontalAlignment(SwingConstants.RIGHT);
		label_4.setHorizontalTextPosition(SwingConstants.LEADING);
		label_4.setText("详细地址：");

		//、创建显示详细地址的文本框，并设置其初始位置和大小
		textField_1 = new JTextField();
		textField_1.setBounds(113, 208, 367, 28);
		backgroundPanel.add(textField_1);

		//、创建Email标签，并设置其初始位置和大小
		final JLabel label_4_1 = new JLabel();
		label_4_1.setBounds(36, 252, 65, 18);
		backgroundPanel.add(label_4_1);
		label_4_1.setHorizontalTextPosition(SwingConstants.LEADING);
		label_4_1.setHorizontalAlignment(SwingConstants.RIGHT);
		label_4_1.setText("E-mail：");

		//、创建显示Email内容的文本框，并设置其初始位置和大小
		textField_3 = new JTextField();
		textField_3.setBounds(113, 248, 367, 27);
		backgroundPanel.add(textField_3);

		//、创建保存按钮并设置其初始位置和大小
		final JButton button = new JButton();
		button.setBounds(159, 289, 75, 28);
		backgroundPanel.add(button);
		button.setText("保存");

		//、创建重置按钮并设置其初始位位置和大小
		final JButton button_1 = new JButton();
		button_1.setBounds(265, 289, 75, 28);
		backgroundPanel.add(button_1);
		button_1.setText("重置");
		//
	}

	/**
	 * 获取省、直辖市，自治区
	 * 
	 * @return
	 */
	public Object[] getProvince() {
		Map<String, String[]> map = CityMap.model;// 获取省份信息保存到Map中
		Set<String> set = map.keySet(); // 获取Map集合中的键，并以Set集合返回
		Object[] province = set.toArray(); // 转换为数组
		return province; // 返回获取的省份信息
	}

	/**
	 * 获取指定省对应的市/县
	 * 
	 * @param selectProvince
	 * @return
	 */
	public String[] getCity(String selectProvince) {
		Map<String, String[]> map = CityMap.model; // 获取省份信息保存到Map中
		String[] arrCity = map.get(selectProvince); // 获取指定键的值
		return arrCity; // 返回获取的市/县
	}

	//、编辑改变选型监控事件，先清除，再获取，最后添加
    private void itemChange() {
        String selectProvince = (String) comboBox.getSelectedItem();
        cityComboBox.removeAllItems(); // 清空市/县列表
        String[] arrCity = getCity(selectProvince); // 获取市/县
        cityComboBox.setModel(new DefaultComboBoxModel(arrCity)); // 重新添加市/县列表的值
    }
}