import java.awt.Color;

import java.awt.Font;

import java.awt.FontMetrics;

import java.awt.Graphics2D;

import java.awt.image.BufferedImage;

import java.awt.image.IndexColorModel;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStream;

import javax.imageio.ImageIO;

/**

 * 根据文本生成图片的工具

 * @author Winter Lau

 * @date 2009-7-30 下午12:58:26

 */

public class TextImageUtils {

    private final static IndexColorModel icm = createIndexColorModel();

    static IndexColorModel createIndexColorModel() {

        BufferedImage ex = new BufferedImage(1, 1, BufferedImage.TYPE_BYTE_INDEXED);

        IndexColorModel icm = (IndexColorModel) ex.getColorModel();

        int SIZE = 256;

        byte[] r = new byte[SIZE];

        byte[] g = new byte[SIZE];

        byte[] b = new byte[SIZE];

        byte[] a = new byte[SIZE];

        icm.getReds(r);

        icm.getGreens(g);

        icm.getBlues(b);

        java.util.Arrays.fill(a, (byte)255);

        r[0] = g[0] = b[0] = a[0] = 0; //transparent

        return new IndexColorModel(8, SIZE, r, g, b, a);

    }

    /**

     * 生成电子邮件图片

     * @param email

     * @param out

     * @throws IOException

     */

    public static void MakeEmailImage(String email, OutputStream out) throws IOException {

        int height = 22;

        BufferedImage bi = new BufferedImage(255,height,BufferedImage.TYPE_INT_RGB);

        Graphics2D g = (Graphics2D)bi.getGraphics();

        Font mFont = new Font("Verdana", Font.PLAIN, 14);

        g.setFont(mFont);

        g.drawString(email, 2, 19);

        FontMetrics fm = g.getFontMetrics();

        int new_width = fm.charsWidth(email.toCharArray(), 0, email.length()) + 4;

        int new_height = fm.getHeight();

        BufferedImage nbi = new BufferedImage(new_width, new_height,

            BufferedImage.TYPE_BYTE_INDEXED, icm);

        Graphics2D g2 = (Graphics2D)nbi.getGraphics();

        g2.setColor(new Color(0,0,0,0));//透明

        g2.fillRect(0,0,new_width,new_height);

        g2.setFont(mFont);

        g2.setColor(new Color(200,0,0));

        g2.drawString(email, 2, new_height-4);

        ImageIO.write(nbi, "gif", out);

    }

    /**

     * 生成电话号码图片

     * @param phone

     * @param out

     * @throws IOException

     */

    public static void MakePhoneImage(String phone, OutputStream out) throws IOException {

        int height = 22;

        BufferedImage bi = new BufferedImage(255,height,BufferedImage.TYPE_INT_RGB);

        Graphics2D g = (Graphics2D)bi.getGraphics();

        Font mFont = new Font("Verdana", Font.BOLD, 20);

        g.setFont(mFont);

        g.drawString(phone, 2, 19);

        FontMetrics fm = g.getFontMetrics();

        int new_width = fm.charsWidth(phone.toCharArray(), 0, phone.length()) + 4;

        int new_height = fm.getHeight();

        BufferedImage nbi = new BufferedImage(new_width, new_height,

            BufferedImage.TYPE_BYTE_INDEXED, icm);

        Graphics2D g2 = (Graphics2D)nbi.getGraphics();

        g2.setColor(new Color(0,0,0,0));//透明

        g2.fillRect(0,0,new_width,new_height);

        g2.setFont(mFont);

        g2.setColor(new Color(200,0,0));

        g2.drawString(phone, 2, new_height-4);

        ImageIO.write(nbi, "gif", out);

    }

    /**

     * 生成产品关键特征

     * @param attribute

     * @param out

     * @throws IOException

     */

    public static void MakeProductAttribute(String attribute, OutputStream out) throws IOException{

        int height = 22;

        BufferedImage bi = new BufferedImage(255,height,BufferedImage.TYPE_INT_RGB);

        Graphics2D g = (Graphics2D)bi.getGraphics();

        Font mFont = new Font("宋体", Font.BOLD, 13);

        g.setFont(mFont);

        g.drawString(new String(attribute), 2, 19);

        FontMetrics fm = g.getFontMetrics();

        int new_width = fm.charsWidth(attribute.toCharArray(), 0, attribute.length()) + 4;

        int new_height = fm.getHeight();

        BufferedImage nbi = new BufferedImage(new_width, new_height,

           BufferedImage.TYPE_BYTE_INDEXED, icm);

        Graphics2D g2 = (Graphics2D)nbi.getGraphics();

        g2.setColor(new Color(0,0,0,0));//透明

        g2.fillRect(0,0,new_width,new_height);

        g2.setFont(mFont);

        g2.setColor(new Color(200,0,0));

        g2.drawString(attribute, 2, new_height-4);

        ImageIO.write(nbi, "gif", out);

    }

    public static void main(String[] args) throws IOException {

        String num = "020-85551111";

        FileOutputStream fos = new FileOutputStream("D:/phone.gif");

        try{

            MakePhoneImage(num, fos);

        }finally{

            fos.close();

        }

        String email = "xxxxx@oschina.net";

        FileOutputStream fos2 = new FileOutputStream("D:/email.gif");

        try{

            MakeEmailImage(email, fos2);

        }finally{

            fos2.close();

        }

    }

}