表情自动生成器java代码实现

/** *@Description: 图片处理类 */ package cn.lulei.util.img; import java.awt.Color; import java.awt.Font; import java.awt.Graphics2D; import java.awt.Image; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import java.io.OutputStream; import java.util.ArrayList; import javax.imageio.ImageIO; import com.sun.image.codec.jpeg.JPEGCodec; import com.sun.image.codec.jpeg.JPEGEncodeParam; import com.sun.image.codec.jpeg.JPEGImageEncoder; public class ImgDeal { private final static int FONTSIZE = 24; /** * @param filePath * @param outStream * @param characters * @param heights * @param c * @throws IOException * @Date: 2014-1-20 * @Author: lulei * @Description: 绘制图片 */ public static void drawImg(String filePath, OutputStream outStream, ArrayList<String> characters, ArrayList<Integer> heights, Color c) throws IOException { //参数不对，直接返回 if(characters == null || heights == null || characters.size() != heights.size()){ return; } File file = new File(filePath); //文件不存在，直接返回 if (!file.exists()) { return; } Image img = ImageIO.read(file); int[] wh = getImgWH(img); BufferedImage bufferedImage = new BufferedImage(wh[0], wh[1], BufferedImage.TYPE_INT_RGB); Graphics2D g = bufferedImage.createGraphics(); g.drawImage(img.getScaledInstance(wh[0], wh[1], Image.SCALE_SMOOTH), 0, 0, null); g.setColor(c); int i = 0; //图片上输入文字 for (String character : characters){ int[] fl = getFsLs(wh[0], getLength(character, 0)); g.setFont(new Font("楷体", Font.BOLD, fl[1])); g.drawString(character, fl[0], heights.get(i++)); } //将图片输入到输出流中 JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(outStream); JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bufferedImage); param.setQuality(1.0F, false); encoder.setJPEGEncodeParam(param); encoder.encode(bufferedImage); } /** * @param question * @param defaultInt * @return * @Date: 2014-1-20 * @Author: lulei * @Description: 计算字符长度 */ private static int getLength(String question, int defaultInt){ int re = 0; if (question != null){ int count = question.length(); for(int i = 0; i < count; i++) { if (question.charAt(i) < 255) { re += 5; } else { re += 9; } } } re /= 9; return re == 0 ? defaultInt : re; } /** * @param img * @return * @Date: 2014-1-20 * @Author: lulei * @Description: 获取图片的长宽 */ private static int[] getImgWH(Image img){ int[] wh = new int[2]; wh[0] = img.getWidth(null); wh[1] = img.getHeight(null); return wh; } /** * @param width * @param length * @return * @Date: 2014-1-20 * @Author: lulei * @Description: 计算生成文字的宽度的起始位置和字体大小 */ private static int[] getFsLs(int width, int length) { int[] fl = new int[2]; if (length * FONTSIZE < width) { fl[0] = (width - (length * FONTSIZE)) / 2; fl[1] = FONTSIZE; } else { fl[0] = 5; fl[1] = width / length - 1; } return fl; } }