在Java項(xiàng)目中使用JFrame進(jìn)行美化窗體

package com;
 
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.Image;
import java.awt.geom.RoundRectangle2D;
import java.io.File;
 
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLayeredPane;
import javax.swing.JPanel;
import javax.swing.JRootPane;
import javax.swing.JLabel;
 
import com.alibaba.fastjson.JSON;
import com.model.Message;
import com.model.User;
import com.sun.awt.AWTUtilities;
import com.util.FileUtils;
import com.util.MyButton;
import com.util.MyLineBorder;
import com.util.VerifyCodeUtils;
 
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JTextField;
import javax.swing.border.MatteBorder;
import javax.swing.JPasswordField;
import java.awt.event.FocusAdapter;
import java.awt.event.FocusEvent;
/**
 * 用戶登錄窗體（按照設(shè)計(jì)圖片效果制作）
 * @author admin
 *
 */
public class Login1{
 
  private JFrame frame;//窗體
  private JTextField userNameField;//用戶名輸入框
  private JPasswordField passwordField;//密碼輸入框
  private JTextField verifyCodeField;//驗(yàn)證碼輸入框
  private String verifyCode;//驗(yàn)證碼圖片中的驗(yàn)證碼值
 
  /**
   * Launch the application.
   */
  public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
      public void run() {
        try {
          Login1 window = new Login1();
          window.frame.setVisible(true);
        } catch (Exception e) {
          e.printStackTrace();
        }
      }
    });
  }
  /**
   * Create the application.
   */
  public Login1() {
    initialize();
  }
  /**
   * Initialize the contents of the frame.
   */
  private void initialize() {
    //將存儲(chǔ)驗(yàn)證碼文件夾下的所有驗(yàn)證碼圖片刪除
    FileUtils.deleteAllFiles("./verifyCodeImg");
    //自定義圓角輸入框邊界線
    MyLineBorder myLineBorder = new MyLineBorder(new Color(192, 192, 192), 1 , true);
    //只顯示輸入框的下邊框
    MatteBorder bottomBorder = new MatteBorder(0, 0, 1, 0, new Color(192, 192, 192));
    //設(shè)置JFrame禁用本地外觀，使用下面自定義設(shè)置的外觀；
    JFrame.setDefaultLookAndFeelDecorated(true);
    frame = new JFrame();
    frame.setBounds(0, 0, 300, 490);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().setLayout(null);
    /**
     * 對(duì)窗體進(jìn)行基本設(shè)置
     */
    //設(shè)置窗體在計(jì)算機(jī)窗口的中心部位顯示
    frame.setLocationRelativeTo(frame.getOwner());
    // 去掉窗口的裝飾
    frame.setUndecorated(true);
    //采用指定的窗口裝飾風(fēng)格
    frame.getRootPane().setWindowDecorationStyle(JRootPane.NONE);
    //設(shè)置窗體圓角，最后兩個(gè)參數(shù)分別為圓角的寬度、高度數(shù)值，一般這兩個(gè)數(shù)值都是一樣的
    AWTUtilities.setWindowShape(frame,
        new RoundRectangle2D.Double(0.0D, 0.0D, frame.getWidth(), frame.getHeight(), 20.0D, 20.0D));
    //設(shè)置背景顏色，記住一定要修改frame.getContentPane()的顏色，因?yàn)槲覀兛吹降亩际沁@個(gè)的顏色而并不是frame的顏色
    frame.getContentPane().setBackground(Color.white);
    /**
     * 插入頂部非凡汽車背景圖片
     */
    //創(chuàng)建具有分層的JLayeredPane
    JLayeredPane layeredPane = new JLayeredPane();
    layeredPane.setBounds(0, -5, 300, 200);
    frame.getContentPane().add(layeredPane);
    // 創(chuàng)建圖片對(duì)象
    ImageIcon img = new ImageIcon(Login1.class.getResource("/images/dingbu.jpg"));
    //設(shè)置圖片在窗體中顯示的寬度、高度
    img.setImage(img.getImage().getScaledInstance(300, 200,Image.SCALE_DEFAULT));
     
    JPanel panel = new JPanel();
    panel.setBounds(0, -5, 300, 200);
    layeredPane.add(panel, JLayeredPane.DEFAULT_LAYER);
     
    JLabel lblNewLabel = new JLabel("");
    panel.add(lblNewLabel);
    lblNewLabel.setIcon(img);
    /**
     * 插入窗體關(guān)閉的背景圖片及功能
     */
    // 創(chuàng)建圖片對(duì)象
    ImageIcon closeImg = new ImageIcon(Login1.class.getResource("/images/close.png"));
    //設(shè)置圖片在窗體中顯示的寬度、高度
    closeImg.setImage(closeImg.getImage().getScaledInstance(31, 31,Image.SCALE_DEFAULT));
     
    JPanel closePanel = new JPanel();
    closePanel.setBounds(269, -5, 31, 31);
    layeredPane.add(closePanel,JLayeredPane.MODAL_LAYER);
     
    JLabel closeLabel = new JLabel("");
    closePanel.add(closeLabel);
    closeLabel.setIcon(closeImg);
    closeLabel.addMouseListener(new MouseAdapter() {
      //鼠標(biāo)點(diǎn)擊關(guān)閉圖片，實(shí)現(xiàn)關(guān)閉窗體的功能
      @Override
      public void mouseClicked(MouseEvent e) {
        //dispose(); 
        System.exit(0);//使用dispose();也可以關(guān)閉只是不是真正的關(guān)閉
      }
      //鼠標(biāo)進(jìn)入，換關(guān)閉的背景圖片
      @Override
      public void mouseEntered(MouseEvent e) {
        // 創(chuàng)建圖片對(duì)象
        ImageIcon closeImg1 = new ImageIcon(Login1.class.getResource("/images/mouse_close.png"));
        //設(shè)置圖片在窗體中顯示的寬度、高度
        closeImg1.setImage(closeImg1.getImage().getScaledInstance(31, 31,Image.SCALE_DEFAULT));
        closeLabel.setIcon(closeImg1);
      }
      //鼠標(biāo)離開，換關(guān)閉的背景圖片
      @Override
      public void mouseExited(MouseEvent e) {
        // 創(chuàng)建圖片對(duì)象
        ImageIcon closeImg = new ImageIcon(Login1.class.getResource("/images/close.png"));
        //設(shè)置圖片在窗體中顯示的寬度、高度
        closeImg.setImage(closeImg.getImage().getScaledInstance(31, 31,Image.SCALE_DEFAULT));
        closeLabel.setIcon(closeImg);
      }
    });
    /**
     * 插入窗體最小化的背景圖片及功能
     */
    // 創(chuàng)建圖片對(duì)象
    ImageIcon minImg = new ImageIcon(Login1.class.getResource("/images/min.png"));
    //設(shè)置圖片在窗體中顯示的寬度、高度
    minImg.setImage(minImg.getImage().getScaledInstance(31, 31,Image.SCALE_DEFAULT));
     
    JPanel minPanel = new JPanel();
    minPanel.setBounds(237, -5, 31, 31);
    layeredPane.add(minPanel,JLayeredPane.MODAL_LAYER);
     
    JLabel minLabel = new JLabel("");
    minLabel.addMouseListener(new MouseAdapter() {
      //鼠標(biāo)點(diǎn)擊最小化圖片，實(shí)現(xiàn)最小化窗體的功能
      @Override
      public void mouseClicked(MouseEvent e) {
        frame.setExtendedState(JFrame.ICONIFIED);//最小化窗體
      }
      //鼠標(biāo)進(jìn)入，換最小化的背景圖片
      @Override
      public void mouseEntered(MouseEvent e) {
        // 創(chuàng)建圖片對(duì)象
        ImageIcon minImg1 = new ImageIcon(Login1.class.getResource("/images/mouse_min.png"));
        //設(shè)置圖片在窗體中顯示的寬度、高度
        minImg1.setImage(minImg1.getImage().getScaledInstance(31, 31,Image.SCALE_DEFAULT));
        minLabel.setIcon(minImg1);
      }
      //鼠標(biāo)離開，換最小化的背景圖片
      @Override
      public void mouseExited(MouseEvent e) {
        // 創(chuàng)建圖片對(duì)象
        ImageIcon minImg = new ImageIcon(Login1.class.getResource("/images/min.png"));
        //設(shè)置圖片在窗體中顯示的寬度、高度
        minImg.setImage(minImg.getImage().getScaledInstance(31, 31,Image.SCALE_DEFAULT));
        minLabel.setIcon(minImg);
      }
    });
    minPanel.add(minLabel);
    minLabel.setIcon(minImg);
    /**
     * 插入用戶名輸入框前面的圖片
     */
    // 創(chuàng)建圖片對(duì)象
    ImageIcon userNameImg = new ImageIcon(Login1.class.getResource("/images/user_name.png"));
    //設(shè)置圖片在窗體中顯示的寬度、高度
    userNameImg.setImage(userNameImg.getImage().getScaledInstance(40, 40,Image.SCALE_DEFAULT));
     
    JLabel userNameLabel = new JLabel("");
    userNameLabel.setBounds(0, 220, 40, 40);
    userNameLabel.setIcon(userNameImg);
    //默認(rèn)獲取光標(biāo)
    userNameLabel.setFocusable(true);
    frame.getContentPane().add(userNameLabel);
    /**
     * 添加圓角的用戶名輸入框
     */
    userNameField = new JTextField();
    userNameField.setBounds(50, 220, 235, 50);
    userNameField.setBorder(bottomBorder);
    userNameField.setText(" 用戶名");
    userNameField.setFont(new Font("微軟雅黑", 0, 14));
    userNameField.setForeground(Color.GRAY);//默認(rèn)設(shè)置輸入框中的文字顏色為灰色
    userNameField.addFocusListener(new FocusAdapter() {
      //獲取光標(biāo)事件
      @Override
      public void focusGained(FocusEvent e) {
        //獲取焦點(diǎn)時(shí)，輸入框中內(nèi)容是“用戶名”，那么去掉輸入框中顯示的內(nèi)容；
        if("用戶名".equals((userNameField.getText().trim()))){
          userNameField.setText("");
          userNameField.setForeground(Color.black);//設(shè)置顏色為黑色
        }
      }
      //失去光標(biāo)事件
      @Override
      public void focusLost(FocusEvent e) {
        //失去焦點(diǎn)時(shí)，如果輸入框中去掉空格后的字符串為空串則顯示用戶名
        if("".equals((userNameField.getText().trim()))){
          userNameField.setText(" 用戶名");
          userNameField.setFont(new Font("微軟雅黑", 0, 14));
          userNameField.setForeground(Color.GRAY);//默認(rèn)設(shè)置輸入框中的文字顏色為灰色
        }
      }
    });
    frame.getContentPane().add(userNameField);
    userNameField.setColumns(10);
    /**
     * 插入密碼輸入框前面的圖片
     */
    // 創(chuàng)建圖片對(duì)象
    ImageIcon passwordImg = new ImageIcon(Login1.class.getResource("/images/password.png"));
    //設(shè)置圖片在窗體中顯示的寬度、高度
    passwordImg.setImage(passwordImg.getImage().getScaledInstance(40, 40,Image.SCALE_DEFAULT));
     
    JLabel passwordLabel = new JLabel("");
    passwordLabel.setBounds(0, 280, 40, 40);
    passwordLabel.setIcon(passwordImg);
    frame.getContentPane().add(passwordLabel);
    /**
     * 添加圓角的密碼輸入框
     */
    passwordField = new JPasswordField();
    passwordField.setBounds(50, 280, 235, 50);
    passwordField.setBorder(bottomBorder);
    passwordField.setText(" 密碼");
    passwordField.setFont(new Font("微軟雅黑", 0, 14));
    passwordField.setForeground(Color.GRAY);//默認(rèn)設(shè)置輸入框中的文字顏色為灰色
    passwordField.setEchoChar((char)0);//顯示密碼輸入框中內(nèi)容
    passwordField.addFocusListener(new FocusAdapter() {
      //獲取光標(biāo)事件
      @Override
      public void focusGained(FocusEvent e) {
        //獲取焦點(diǎn)時(shí)，輸入框中內(nèi)容是“用戶名”，那么去掉輸入框中顯示的內(nèi)容；
        if("密碼".equals((passwordField.getText().trim()))){
          passwordField.setText("");
          passwordField.setEchoChar('*');//顯示密碼輸入框中內(nèi)容
          passwordField.setForeground(Color.black);//設(shè)置顏色為黑色
        }
      }
      //失去光標(biāo)事件
      @Override
      public void focusLost(FocusEvent e) {
        //失去焦點(diǎn)時(shí)，如果輸入框中去掉空格后的字符串為空串則顯示用戶名
        if("".equals((passwordField.getText().trim()))){
          passwordField.setText(" 密碼");
          passwordField.setFont(new Font("微軟雅黑", 0, 14));
          passwordField.setForeground(Color.GRAY);//默認(rèn)設(shè)置輸入框中的文字顏色為灰色
          passwordField.setEchoChar((char)0);//顯示密碼輸入框中內(nèi)容
        }
      }
    });
     
    frame.getContentPane().add(passwordField);
    /**
     * 插入驗(yàn)證碼輸入框前面的圖片
     */
    // 創(chuàng)建圖片對(duì)象
    ImageIcon verifyCodeImg = new ImageIcon(Login1.class.getResource("/images/verify_code.png"));
    //設(shè)置圖片在窗體中顯示的寬度、高度
    verifyCodeImg.setImage(verifyCodeImg.getImage().getScaledInstance(40, 40,Image.SCALE_DEFAULT));
     
    JLabel verifyCodeLabel = new JLabel("");
    verifyCodeLabel.setBounds(0, 340, 40, 40);
    verifyCodeLabel.setIcon(verifyCodeImg);
    frame.getContentPane().add(verifyCodeLabel);
    /**
     * 添加圓角的驗(yàn)證碼輸入框
     */
    verifyCodeField = new JTextField();
    verifyCodeField.setBounds(50, 340, 135, 50);
    verifyCodeField.setBorder(bottomBorder);
    verifyCodeField.setText(" 驗(yàn)證碼");
    verifyCodeField.setFont(new Font("微軟雅黑", 0, 14));
    verifyCodeField.setForeground(Color.GRAY);//默認(rèn)設(shè)置輸入框中的文字顏色為灰色
    verifyCodeField.addFocusListener(new FocusAdapter() {
      //獲取光標(biāo)事件
      @Override
      public void focusGained(FocusEvent e) {
        //獲取焦點(diǎn)時(shí)，輸入框中內(nèi)容是“用戶名”，那么去掉輸入框中顯示的內(nèi)容；
        if("驗(yàn)證碼".equals((verifyCodeField.getText().trim()))){
          verifyCodeField.setText("");
          verifyCodeField.setForeground(Color.black);//設(shè)置顏色為黑色
        }
      }
      //失去光標(biāo)事件
      @Override
      public void focusLost(FocusEvent e) {
        //失去焦點(diǎn)時(shí)，如果輸入框中去掉空格后的字符串為空串則顯示用戶名
        if("".equals((verifyCodeField.getText().trim()))){
          verifyCodeField.setText(" 驗(yàn)證碼");
          verifyCodeField.setFont(new Font("微軟雅黑", 0, 14));
          verifyCodeField.setForeground(Color.GRAY);//默認(rèn)設(shè)置輸入框中的文字顏色為灰色
        }
      }
    });
     
    frame.getContentPane().add(verifyCodeField);
    verifyCodeField.setColumns(10);
    /**
     * 添加驗(yàn)證碼圖片
     */
    JLabel verifyCodeImgLabel = new JLabel("");
    verifyCodeImgLabel.setBounds(190, 340, 95, 50);
    verifyCodeImgLabel.setBorder(myLineBorder);
    frame.getContentPane().add(verifyCodeImgLabel);
    //生成一張驗(yàn)證碼圖片
    verifyCode = VerifyCodeUtils.createOneCodeImage();
    //將剛生成的驗(yàn)證碼圖片顯示在窗體中去
    ImageIcon verifyCodeSourceImg = new ImageIcon("./verifyCodeImg/"+verifyCode+".jpg");// 創(chuàng)建圖片對(duì)象
    //設(shè)置圖片在窗體中顯示的寬度、高度
    verifyCodeSourceImg.setImage(verifyCodeSourceImg.getImage().getScaledInstance(95, 50,Image.SCALE_DEFAULT));
    verifyCodeImgLabel.setIcon(verifyCodeSourceImg);
    //點(diǎn)擊驗(yàn)證碼圖片，換一個(gè)新的驗(yàn)證碼圖片
    verifyCodeImgLabel.addMouseListener(new MouseAdapter() {
      @Override
      public void mouseClicked(MouseEvent e) {
        //刪除上一次的驗(yàn)證碼圖片
        File file = new File("./src/verifyCodeImg/"+verifyCode+".jpg");
        if(file.exists()){
          file.delete();
        }
        //生成一張新的驗(yàn)證碼圖片
        verifyCode = VerifyCodeUtils.createOneCodeImage();
        ImageIcon verifyCodeSourceImg1 = new ImageIcon("./verifyCodeImg/"+verifyCode+".jpg");
        verifyCodeSourceImg1.setImage(verifyCodeSourceImg1.getImage().getScaledInstance(95, 50,Image.SCALE_DEFAULT));
        verifyCodeImgLabel.setIcon(verifyCodeSourceImg1);
      }
    });
    /**
     * 添加提示性信息的JLabel
     */
    JLabel reminderMessage = new JLabel("",JLabel.CENTER);
    reminderMessage.setBounds(15, 395, 270, 20);
    reminderMessage.setForeground(Color.red);
    reminderMessage.setFont(new Font("微軟雅黑", 0, 12));
    frame.getContentPane().add(reminderMessage);
    /**
     * 添加圓角的提交按鈕
     */
    MyButton myButton = new MyButton("安全登錄", 0);
    myButton.setBounds(15, 420, 270, 50);
    frame.getContentPane().add(myButton);
     
     
    //設(shè)置窗體可見
    frame.setVisible(true);
  }
}

package com.util; 
import java.io.File;
 
/**
 * 對(duì)文件操作的工具類
 * @author admin
 *
 */
public class FileUtils {
   
  /**
   * 刪除指定文件夾下的所有文件，此文件夾內(nèi)只有文件，沒有任何文件夾
   */
  public static Boolean deleteAllFiles(String filePath){
    Boolean result = false;
    File file = new File(filePath);
    File temp = null;
    if(file.exists()){
      String [] tempList = file.list();
      for (String string : tempList) {
        temp = new File(filePath+"/"+string);
        if(temp.isFile()){
          temp.delete();
        }
      }
      tempList = file.list();
      if(tempList.length==0){
        result = true;
      }
    }
    return result;
  }
   
  public static void main(String[] args) {
    Boolean result = FileUtils.deleteAllFiles("./verifyCodeImg");
    System.out.println(result);
  } 
}

package com.util;
 
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.RoundRectangle2D;
import javax.swing.JButton;
import javax.swing.JFrame;
/**
 * 自定義帶有圓角的按鈕工具類
 * @author admin
 *
 */
public class MyButton extends JButton {
  /* 決定圓角的弧度 */
  public static int radius = 4;
  public static Color COLOR1, COLOR2;
  public static int pink = 3, ashen = 2, sky = 1, stone = 0;
  /* 粉紅 */
  public static Color pink1 = new Color(39, 121, 181);
  public static Color pink2 = new Color(39, 121, 181);
  /* 灰白 */
  public static Color ashen1 = new Color(39, 121, 181);
  public static Color ashen2 = new Color(39, 121, 181);
  /* 深寶石藍(lán) */
  public static Color stone1 = new Color(39, 121, 181);
  public static Color stone2 = new Color(39, 121, 181);
  /* 淡天藍(lán)色 */
  public static Color sky1 = new Color(39, 121, 181);
  public static Color sky2 = new Color(39, 121, 181);
  /* 光標(biāo)進(jìn)入按鈕判斷 */
  private boolean hover;
 
  public MyButton() {
    this("", stone);
  }
 
  public MyButton(String name) {
    this(name, stone);
  }
 
  public MyButton(String name, int style) {
    super.setText(name);
    if (style == pink) {
      COLOR1 = pink1;
      COLOR2 = pink2;
    }
    if (style == ashen) {
      COLOR1 = ashen1;
      COLOR2 = ashen2;
    }
    if (style == stone) {
      COLOR1 = stone1;
      COLOR2 = stone2;
    }
    if (style == sky) {
      COLOR1 = sky1;
      COLOR2 = sky2;
    }
    paintcolor(COLOR1, COLOR2);
  }
 
  private void paintcolor(Color COLOR1, Color COLOR2) {
    setMargin(new Insets(0, 0, 0, 0));
    setFont(new Font("微軟雅黑", 0, 14));
    setBorderPainted(false);
    setForeground(Color.white);
    setFocusPainted(false);
    setContentAreaFilled(false);
  }
 
  @Override
  protected void paintComponent(Graphics g) {
    Graphics2D g2d = (Graphics2D) g.create();
    int height = getHeight();
    int with = getWidth();
    float tran = 0.9F;
    /*if (!hover) { 鼠標(biāo)離開/進(jìn)入時(shí)的透明度改變量
      tran = 0.6F;
    }*/
    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    /* GradientPaint是顏色漸變類 */
    GradientPaint p1;
    GradientPaint p2;
    if (getModel().isPressed()) {
      p1 = new GradientPaint(0, 0, new Color(0, 0, 0), 0, height, new Color(100, 100, 100), true);
      p2 = new GradientPaint(0, 1, new Color(0, 0, 0, 50), 0, height, new Color(255, 255, 255, 100), true);
    } else {
      p1 = new GradientPaint(0, 0, new Color(100, 100, 100), 0, height, new Color(0, 0, 0), true);
      p2 = new GradientPaint(0, 1, new Color(255, 255, 255, 100), 0, height, new Color(0, 0, 0, 50), true);
    }
    g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, tran));
    RoundRectangle2D.Float r2d = new RoundRectangle2D.Float(0, 0, with - 1, height - 1, radius, radius);
    // 最后兩個(gè)參數(shù)數(shù)值越大，按鈕越圓，以下同理
    Shape clip = g2d.getClip();
    g2d.clip(r2d);
    GradientPaint gp = new GradientPaint(0.0F, 0.0F, COLOR1, 0.0F, height / 2, COLOR2, true);
    g2d.setPaint(gp);
    g2d.fillRect(0, 0, with, height);
    g2d.setClip(clip);
    g2d.setPaint(p1);
    g2d.drawRoundRect(0, 0, with - 3, height - 3, radius, radius);
    g2d.setPaint(p2);
    g2d.drawRoundRect(1, 1, with - 3, height - 3, radius, radius);
    g2d.dispose();
    super.paintComponent(g);
  }
 
  public static void main(String args[]) {
    JFrame frm = new JFrame();
    MyButton but = new MyButton("圓角JButton", 0);
    frm.setLayout(null);
    frm.setBounds(800, 400, 500, 200);
    but.setBounds(30, 30, 200, 50);
    frm.add(but);
    frm.setDefaultCloseOperation(3);
    frm.setVisible(true);
  }
}

package com.util; 
  
import java.awt.Color; 
import java.awt.Component; 
import java.awt.Graphics; 
import java.awt.Graphics2D; 
import java.awt.RenderingHints; 
import javax.swing.border.LineBorder;
 
/**
 * 為創(chuàng)建圓角輸入框自定義邊框線條工具類
 * @author admin
 *
 */
public class MyLineBorder extends LineBorder{  
  
  private static final long serialVersionUID = 1L;    
  public MyLineBorder(Color color, int thickness, boolean roundedCorners) { 
    super(color, thickness, roundedCorners); 
  } 
  
   public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) { 
      
     RenderingHints rh = new RenderingHints(RenderingHints.KEY_ANTIALIASING, 
                        RenderingHints.VALUE_ANTIALIAS_ON); 
     Color oldColor = g.getColor(); 
     Graphics2D g2 = (Graphics2D)g; 
     int i; 
     g2.setRenderingHints(rh); 
     g2.setColor(lineColor); 
     for(i = 0; i < thickness; i++) { 
     if(!roundedCorners) 
       g2.drawRect(x+i, y+i, width-i-i-1, height-i-i-1); 
     else 
       g2.drawRoundRect(x+i, y+i, width-i-i-1, height-i-i-1, 10, 10); //就是這一句 ，后兩個(gè)參數(shù)控制圓角的大小
     } 
     g2.setColor(oldColor); 
  }  
}

package com.util;
 
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Arrays;
import java.util.Random; 
import javax.imageio.ImageIO;
/**
 * 生成驗(yàn)證碼圖片的工具類
 * @author admin
 *
 */
public class VerifyCodeUtils {
 
  // 使用到Algerian字體，系統(tǒng)里沒有的話需要安裝字體，字體只顯示大寫，去掉了1,0,i,o幾個(gè)容易混淆的字符
  public static final String VERIFY_CODES = "23456789ABCDEFGHJKLMNPQRSTUVWXYZ";
  private static Random random = new Random();
 
  /**
   * 使用系統(tǒng)默認(rèn)字符源生成驗(yàn)證碼
   *
   * @param verifySize
   *      驗(yàn)證碼長(zhǎng)度
   * @return
   */
  public static String generateVerifyCode(int verifySize) {
    return generateVerifyCode(verifySize, VERIFY_CODES);
  }
 
  /**
   * 使用指定源生成驗(yàn)證碼
   *
   * @param verifySize
   *      驗(yàn)證碼長(zhǎng)度
   * @param sources
   *      驗(yàn)證碼字符源
   * @return
   */
  public static String generateVerifyCode(int verifySize, String sources) {
    if (sources == null || sources.length() == 0) {
      sources = VERIFY_CODES;
    }
    int codesLen = sources.length();
    Random rand = new Random(System.currentTimeMillis());
    StringBuilder verifyCode = new StringBuilder(verifySize);
    for (int i = 0; i < verifySize; i++) {
      verifyCode.append(sources.charAt(rand.nextInt(codesLen - 1)));
    }
    return verifyCode.toString();
  }
 
  /**
   * 生成隨機(jī)驗(yàn)證碼文件,并返回驗(yàn)證碼值
   *
   * @param w
   * @param h
   * @param outputFile
   * @param verifySize
   * @return
   * @throws IOException
   */
  public static String outputVerifyImage(int w, int h, File outputFile, int verifySize) throws IOException {
    String verifyCode = generateVerifyCode(verifySize);
    outputImage(w, h, outputFile, verifyCode);
    return verifyCode;
  }
 
  /**
   * 輸出隨機(jī)驗(yàn)證碼圖片流,并返回驗(yàn)證碼值
   *
   * @param w
   * @param h
   * @param os
   * @param verifySize
   * @return
   * @throws IOException
   */
  public static String outputVerifyImage(int w, int h, OutputStream os, int verifySize) throws IOException {
    String verifyCode = generateVerifyCode(verifySize);
    outputImage(w, h, os, verifyCode);
    return verifyCode;
  }
 
  /**
   * 生成指定驗(yàn)證碼圖像文件
   *
   * @param w
   * @param h
   * @param outputFile
   * @param code
   * @throws IOException
   */
  public static void outputImage(int w, int h, File outputFile, String code) throws IOException {
    if (outputFile == null) {
      return;
    }
    File dir = outputFile.getParentFile();
    if (!dir.exists()) {
      dir.mkdirs();
    }
    try {
      outputFile.createNewFile();
      FileOutputStream fos = new FileOutputStream(outputFile);
      outputImage(w, h, fos, code);
      fos.close();
    } catch (IOException e) {
      throw e;
    }
  }
 
  /**
   * 輸出指定驗(yàn)證碼圖片流
   *
   * @param w
   * @param h
   * @param os
   * @param code
   * @throws IOException
   */
  public static void outputImage(int w, int h, OutputStream os, String code) throws IOException {
    int verifySize = code.length();
    BufferedImage image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
    Random rand = new Random();
    Graphics2D g2 = image.createGraphics();
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    Color[] colors = new Color[5];
    Color[] colorSpaces = new Color[] { Color.WHITE, Color.CYAN, Color.GRAY, Color.LIGHT_GRAY, Color.MAGENTA,
        Color.ORANGE, Color.PINK, Color.YELLOW };
    float[] fractions = new float[colors.length];
    for (int i = 0; i < colors.length; i++) {
      colors[i] = colorSpaces[rand.nextInt(colorSpaces.length)];
      fractions[i] = rand.nextFloat();
    }
    Arrays.sort(fractions);
 
    g2.setColor(Color.GRAY);// 設(shè)置邊框色
    g2.fillRect(0, 0, w, h);
 
    Color c = getRandColor(200, 250);
    g2.setColor(c);// 設(shè)置背景色
    g2.fillRect(0, 2, w, h - 4);
 
    // 繪制干擾線
    Random random = new Random();
    g2.setColor(getRandColor(160, 200));// 設(shè)置線條的顏色
    for (int i = 0; i < 20; i++) {
      int x = random.nextInt(w - 1);
      int y = random.nextInt(h - 1);
      int xl = random.nextInt(6) + 1;
      int yl = random.nextInt(12) + 1;
      g2.drawLine(x, y, x + xl + 40, y + yl + 20);
    }
 
    // 添加噪點(diǎn)
    float yawpRate = 0.05f;// 噪聲率
    int area = (int) (yawpRate * w * h);
    for (int i = 0; i < area; i++) {
      int x = random.nextInt(w);
      int y = random.nextInt(h);
      int rgb = getRandomIntColor();
      image.setRGB(x, y, rgb);
    }
 
    shear(g2, w, h, c);// 使圖片扭曲
 
    g2.setColor(getRandColor(100, 160));
    int fontSize = h - 4;
    Font font = new Font("Algerian", Font.ITALIC, fontSize);
    g2.setFont(font);
    char[] chars = code.toCharArray();
    for (int i = 0; i < verifySize; i++) {
      AffineTransform affine = new AffineTransform();
      affine.setToRotation(Math.PI / 4 * rand.nextDouble() * (rand.nextBoolean() &#63; 1 : -1),
          (w / verifySize) * i + fontSize / 2, h / 2);
      g2.setTransform(affine);
      g2.drawChars(chars, i, 1, ((w - 10) / verifySize) * i + 5, h / 2 + fontSize / 2 - 10);
    }
 
    g2.dispose();
    ImageIO.write(image, "jpg", os);
  }
 
  private static Color getRandColor(int fc, int bc) {
    if (fc > 255)
      fc = 255;
    if (bc > 255)
      bc = 255;
    int r = fc + random.nextInt(bc - fc);
    int g = fc + random.nextInt(bc - fc);
    int b = fc + random.nextInt(bc - fc);
    return new Color(r, g, b);
  }
 
  private static int getRandomIntColor() {
    int[] rgb = getRandomRgb();
    int color = 0;
    for (int c : rgb) {
      color = color << 8;
      color = color | c;
    }
    return color;
  }
 
  private static int[] getRandomRgb() {
    int[] rgb = new int[3];
    for (int i = 0; i < 3; i++) {
      rgb[i] = random.nextInt(255);
    }
    return rgb;
  }
 
  private static void shear(Graphics g, int w1, int h2, Color color) {
    shearX(g, w1, h2, color);
    shearY(g, w1, h2, color);
  }
 
  private static void shearX(Graphics g, int w1, int h2, Color color) {
 
    int period = random.nextInt(2); 
    boolean borderGap = true;
    int frames = 1;
    int phase = random.nextInt(2);
 
    for (int i = 0; i < h2; i++) {
      double d = (double) (period >> 1)
          * Math.sin((double) i / (double) period + (6.2831853071795862D * (double) phase) / (double) frames);
      g.copyArea(0, i, w1, 1, (int) d, 0);
      if (borderGap) {
        g.setColor(color);
        g.drawLine((int) d, i, 0, i);
        g.drawLine((int) d + w1, i, w1, i);
      }
    } 
  }
 
  private static void shearY(Graphics g, int w1, int h2, Color color) {
 
    int period = random.nextInt(40) + 10; // 50;
 
    boolean borderGap = true;
    int frames = 20;
    int phase = 7;
    for (int i = 0; i < w1; i++) {
      double d = (double) (period >> 1)
          * Math.sin((double) i / (double) period + (6.2831853071795862D * (double) phase) / (double) frames);
      g.copyArea(i, 0, 1, h2, 0, (int) d);
      if (borderGap) {
        g.setColor(color);
        g.drawLine(i, (int) d, i, 0);
        g.drawLine(i, (int) d + h2, i, h2);
      } 
    } 
  }
   
  //生成一張驗(yàn)證碼圖片，并保存到項(xiàng)目的verifyCodeImg文件夾下
  public static String createOneCodeImage(){
    String imgName = "";
    try {
      File dir = new File("./verifyCodeImg");
      int w = 95, h = 50;
      String verifyCode = generateVerifyCode(4);
      File file = new File(dir, verifyCode + ".jpg");
      outputImage(w, h, file, verifyCode);
      imgName = verifyCode;
    } catch (IOException e) {
      imgName = "";
      e.printStackTrace();
    }finally{
      return imgName;
    }
  }
 
  public static void main(String[] args) throws IOException {
     
    String codeImage = VerifyCodeUtils.createOneCodeImage();
    System.out.println(codeImage);
   
  }
}

package com.xsh; 
import java.awt.Color;
import java.awt.Container; 
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
import javax.swing.WindowConstants;
 
public class Example1 extends JFrame { //創(chuàng)建一個(gè)類繼承JFrame類
 
 public void CreateJFrame(String title) { //定義一個(gè)CreateJFrame方法
 JFrame jf = new JFrame(title); //實(shí)例化一個(gè)JFrame對(duì)象
 Container container = jf.getContentPane(); //獲取一個(gè)容器
 JLabel jl = new JLabel("這是一個(gè)JFrame窗體"); //創(chuàng)建一個(gè)JLabel標(biāo)簽
 jl.setHorizontalAlignment(SwingConstants.CENTER); //將標(biāo)簽位置設(shè)置為居中
 jl.setForeground(Color.white); //設(shè)置JLabel的顏色
 container.add(jl); //將標(biāo)簽添加到容器中
 container.setBackground(Color.RED); //設(shè)置容器背景顏色
 jf.setVisible(true); //是窗體可視
 jf.setSize(300, 150); //設(shè)置窗體大小
 jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); //設(shè)置窗體關(guān)閉方式
 }
 public static void main(String[] args) {
 // TODO Auto-generated method stub
 new Example1().CreateJFrame("這是我創(chuàng)建的第一個(gè)JFrame窗體。"); //主方法中調(diào)用JFrame()方法
 }
}

package com.xsh;
 
import java.awt.Color;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
import javax.swing.WindowConstants;
 
class MyDialog extends JDialog{ 
 
 private static final long serialVersionUID = 1L;
 
 public MyDialog(MyFrame frame) { 
 super(frame,"第一個(gè)JDialog窗體", true); //實(shí)例化一個(gè)JDialog類對(duì)象，指定對(duì)話框的父窗體、窗體標(biāo)題和類型
 Container container = getContentPane(); //創(chuàng)建一個(gè)容器
 container.add(new JLabel("這是一個(gè)JDialog對(duì)話框")); //在容器中添加標(biāo)簽
 setBounds(100, 100, 200, 100); //設(shè)置容器的窗體大小,其中前兩個(gè)值是設(shè)置對(duì)話框的位置，后兩個(gè)值是設(shè)置對(duì)話框的大小
 }
}
 
public class MyFrame extends JFrame { //創(chuàng)建新類，繼承自JFrame
 private static final long serialVersionUID = 1L;
 public static void main(String[] args) {
 // TODO Auto-generated method stub
 new MyFrame(); //實(shí)例化MyFrame對(duì)象
 }
 public MyFrame() {
 Container container = getContentPane(); //創(chuàng)建一個(gè)容器
 container.setLayout(null);
 JLabel jl = new JLabel("這是一個(gè)JFrame窗體"); //在窗體中設(shè)置標(biāo)簽
 jl.setHorizontalAlignment(SwingConstants.CENTER); //將標(biāo)簽的文字至于標(biāo)簽中間的位置 
 container.add(jl); //將標(biāo)簽添加到容器中
 JButton jb = new JButton("彈出對(duì)話框"); //定義一個(gè)按鈕
 jb.setBounds(10, 30, 100, 20); //設(shè)置按鈕的大小
 jb.addActionListener(new ActionListener() { //為按鈕添加點(diǎn)擊事件
 
  @Override
  public void actionPerformed(ActionEvent e) {
  // TODO Auto-generated method stub
  new MyDialog(MyFrame.this).setVisible(true); //使MyDialog窗體可見
  //在點(diǎn)擊事件中，完成了對(duì)話框的創(chuàng)建
  } 
 });
 container.add(jb);
 container.setBackground(Color.white);
 setSize(200,200);
 setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
 setVisible(true)； 
 }
}