eclipse + maven多模块项目 + SpringMVC + jetty热部署实现验证码图片实例源码

package com.sm.sapp.tiles.impl; import java.awt.Color; import java.awt.Font; import java.awt.Graphics2D; import java.awt.geom.AffineTransform; import java.awt.image.BufferedImage; import java.util.Random; import org.springframework.stereotype.Component; import com.sm.sapp.tiles.interfaces.IIdentifyingCode; /** * 验证码图片生成器 * */ @Component public class IdentifyingCode implements IIdentifyingCode { // 验证码图片的宽度。 private int width = 72; // 验证码图片的高度。 private int height = 24; // 验证码字符个数。 private int count = 4; // 干扰点数量 private int pntsCount = 120; // 干扰线数量 private int linesCount = 15; private Random random = new Random(); public IdentifyingCode() {} public BufferedImage drawIdentifyingCode(String code) { BufferedImage image = new BufferedImage(this.getWidth(), this.getHeight(), BufferedImage.TYPE_INT_BGR); Graphics2D g = image.createGraphics(); // 绘制背景 g.setColor(this.getRandomColor(180, 200)); g.fillRect(0, 0, this.getWidth(), this.getHeight()); // 绘制干扰图形 this.drawRandomShapes(g,linesCount,(int)(pntsCount*0.75)); // 绘制验证码文本 Font myFont = new Font("Georgia", Font.BOLD, 16); // Arial Courier New Verdana int len = code.length(); g.setFont(myFont); for(int i=0;i<len;i++){ String chr = code.charAt(i)+""; Color color = new Color(20 + random.nextInt(50),20 + random.nextInt(50), 20 + random.nextInt(50)); g.setColor(color); // 文字旋转 AffineTransform trans = new AffineTransform(); trans.rotate(random.nextInt(45) * Math.PI / 180, 15 * i + 8, 7); // 缩放文字 float scaleSize = random.nextFloat() + 0.8f; if (scaleSize > 1f) scaleSize = 1f; trans.scale(scaleSize, scaleSize); g.setTransform(trans); g.drawString(chr, 16 * i + 10, 14); } // 在图片最上层绘制干扰图形 this.drawRandomShapes(g,4,(int)(pntsCount*0.75)); g.dispose(); return image; } public String generateIdentifyingCode(int length) { if(length<0){ length = this.count; } StringBuffer strbuf = new StringBuffer(); String str = ""; int itmp = 0; for (int i = 0; i < length; i++) { switch (random.nextInt(2)) { case 1: // 生成A～Z的字母 itmp = random.nextInt(26) + 65; str = String.valueOf((char) itmp); break; case 2: // 生成a～a的字母 itmp = random.nextInt(26) + 97; str = String.valueOf((char) itmp); default: itmp = random.nextInt(10) + 48; str = String.valueOf((char) itmp); break; } strbuf.append(str); } return strbuf.toString(); } /** * 绘制干扰图形 * * @param g * Graphics2D对象，用来绘制图像 * */ private void drawRandomShapes(Graphics2D g,int ls, int ps) { // 绘制干扰线 int i = 0; for (i = 0; i < ls; i++) { g.setColor(this.getRandomColor(160, 200)); int x1 = random.nextInt(width); int y1 = random.nextInt(height); int x2 = random.nextInt(width); int y2 = random.nextInt(height); g.drawLine(x1, y1, x2, y2); } // 绘制干扰点 for (i = 0; i < ps; i++) { g.setColor(this.getRandomColor(160, 200)); int x1 = random.nextInt(width); int y1 = random.nextInt(height); g.drawLine(x1,y1,x1,y1); } } /** * 生成随机颜色 * * @param fc * 前景色 * @param bc * 背景色 * @return Color对象，RGB。 */ private Color getRandomColor(int fc, int bc) { if (fc > 255) fc = 200; 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); } public int getWidth() { return width; } public void setWidth(int width) { this.width = width; } public int getHeight() { return height; } public void setHeight(int height) { this.height = height; } public int getCount() { return count; } public void setCount(int count) { this.count = count; } public int getPntsCount() { return pntsCount; } public void setPntsCount(int pntsCount) { this.pntsCount = pntsCount; } public int getLinesCount() { return linesCount; } public void setLinesCount(int linesCount) { this.linesCount = linesCount; } }