java 超經漂亮驗證碼
阿新 • • 發佈:2019-01-06
package com.zly.xsp.image;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Random;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class CreateImageCode {
// 圖片的寬度。
private int width = 160;
// 圖片的高度。
private int height = 40;
// 驗證碼字元個數
private int codeCount = 4;
// 驗證碼干擾線數
private int lineCount = 20;
// 驗證碼
private String code = null;
// 驗證碼圖片Buffer
private BufferedImage buffImg = null;
Random random = new Random();
public CreateImageCode() {
creatImage();
}
public CreateImageCode(int width, int height) {
this.width = width;
this.height = height;
creatImage();
}
public CreateImageCode(int width, int height, int codeCount) {
this.width = width;
this.height = height;
this.codeCount = codeCount;
creatImage();
}
public CreateImageCode(int width, int height, int codeCount, int lineCount) {
this.width = width;
this.height = height;
this.codeCount = codeCount;
this.lineCount = lineCount;
creatImage();
}
// 生成圖片
private void creatImage() {
int fontWidth = width / codeCount;// 字型的寬度
int fontHeight = height - 5;// 字型的高度
int codeY = height - 8;
// 影象buffer
buffImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics g = buffImg.getGraphics();
//Graphics2D g = buffImg.createGraphics();
// 設定背景色
g.setColor(getRandColor(200, 250));
g.fillRect(0, 0, width, height);
// 設定字型
//Font font1 = getFont(fontHeight);
Font font = new Font("Fixedsys", Font.BOLD, fontHeight);
g.setFont(font);
// 設定干擾線
for (int i = 0; i < lineCount; i++) {
int xs = random.nextInt(width);
int ys = random.nextInt(height);
int xe = xs + random.nextInt(width);
int ye = ys + random.nextInt(height);
g.setColor(getRandColor(1, 255));
g.drawLine(xs, ys, xe, ye);
}
// 新增噪點
float yawpRate = 0.01f;// 噪聲率
int area = (int) (yawpRate * width * height);
for (int i = 0; i < area; i++) {
int x = random.nextInt(width);
int y = random.nextInt(height);
buffImg.setRGB(x, y, random.nextInt(255));
}
String str1 = randomStr(codeCount);// 得到隨機字元
this.code = str1;
for (int i = 0; i < codeCount; i++) {
String strRand = str1.substring(i, i + 1);
g.setColor(getRandColor(1, 255));
// g.drawString(a,x,y);
// a為要畫出來的東西,x和y表示要畫的東西最左側字元的基線位於此圖形上下文座標系的 (x, y) 位置處
g.drawString(strRand, i*fontWidth+3, codeY);
}
}
// 得到隨機字元
private String randomStr(int n) {
String str1 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890";
String str2 = "";
int len = str1.length() - 1;
double r;
for (int i = 0; i < n; i++) {
r = (Math.random()) * len;
str2 = str2 + str1.charAt((int) r);
}
return str2;
}
// 得到隨機顏色
private Color getRandColor(int fc, int bc) {// 給定範圍獲得隨機顏色
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);
}
/**
* 產生隨機字型
*/
private Font getFont(int size) {
Random random = new Random();
Font font[] = new Font[5];
font[0] = new Font("Ravie", Font.PLAIN, size);
font[1] = new Font("Antique Olive Compact", Font.PLAIN, size);
font[2] = new Font("Fixedsys", Font.PLAIN, size);
font[3] = new Font("Wide Latin", Font.PLAIN, size);
font[4] = new Font("Gill Sans Ultra Bold", Font.PLAIN, size);
return font[random.nextInt(5)];
}
// 扭曲方法
private void shear(Graphics g, int w1, int h1, Color color) {
shearX(g, w1, h1, color);
shearY(g, w1, h1, color);
}
private void shearX(Graphics g, int w1, int h1, Color color) {
int period = random.nextInt(2);
boolean borderGap = true;
int frames = 1;
int phase = random.nextInt(2);
for (int i = 0; i < h1; 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 void shearY(Graphics g, int w1, int h1, 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, h1, 0, (int) d);
if (borderGap) {
g.setColor(color);
g.drawLine(i, (int) d, i, 0);
g.drawLine(i, (int) d + h1, i, h1);
}
}
}
public void write(OutputStream sos) throws IOException {
ImageIO.write(buffImg, "png", sos);
sos.close();
}
public BufferedImage getBuffImg() {
return buffImg;
}
public String getCode() {
return code.toLowerCase();
}
//使用方法
/*public void getCode3(HttpServletRequest req, HttpServletResponse response,HttpSession session) throws IOException{
// 設定響應的型別格式為圖片格式
response.setContentType("image/jpeg");
//禁止影象快取。
response.setHeader("Pragma", "no-cache");
response.setHeader("Cache-Control", "no-cache");
response.setDateHeader("Expires", 0);
CreateImageCode vCode = new CreateImageCode(100,30,5,10);
session.setAttribute("code", vCode.getCode());
vCode.write(response.getOutputStream());
}*/
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Random;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class CreateImageCode {
// 圖片的寬度。
private int width = 160;
// 圖片的高度。
private int height = 40;
// 驗證碼字元個數
private int codeCount = 4;
// 驗證碼干擾線數
private int lineCount = 20;
// 驗證碼
private String code = null;
// 驗證碼圖片Buffer
private BufferedImage buffImg = null;
Random random = new Random();
public CreateImageCode() {
creatImage();
}
public CreateImageCode(int width, int height) {
this.width = width;
this.height = height;
creatImage();
}
public CreateImageCode(int width, int height, int codeCount) {
this.width = width;
this.height = height;
this.codeCount = codeCount;
creatImage();
}
public CreateImageCode(int width, int height, int codeCount, int lineCount) {
this.width = width;
this.height = height;
this.codeCount = codeCount;
this.lineCount = lineCount;
creatImage();
}
// 生成圖片
private void creatImage() {
int fontWidth = width / codeCount;// 字型的寬度
int fontHeight = height - 5;// 字型的高度
int codeY = height - 8;
// 影象buffer
buffImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics g = buffImg.getGraphics();
//Graphics2D g = buffImg.createGraphics();
// 設定背景色
g.setColor(getRandColor(200, 250));
g.fillRect(0, 0, width, height);
// 設定字型
//Font font1 = getFont(fontHeight);
Font font = new Font("Fixedsys", Font.BOLD, fontHeight);
g.setFont(font);
// 設定干擾線
for (int i = 0; i < lineCount; i++) {
int xs = random.nextInt(width);
int ys = random.nextInt(height);
int xe = xs + random.nextInt(width);
int ye = ys + random.nextInt(height);
g.setColor(getRandColor(1, 255));
g.drawLine(xs, ys, xe, ye);
}
// 新增噪點
float yawpRate = 0.01f;// 噪聲率
int area = (int) (yawpRate * width * height);
for (int i = 0; i < area; i++) {
int x = random.nextInt(width);
int y = random.nextInt(height);
buffImg.setRGB(x, y, random.nextInt(255));
}
String str1 = randomStr(codeCount);// 得到隨機字元
this.code = str1;
for (int i = 0; i < codeCount; i++) {
String strRand = str1.substring(i, i + 1);
g.setColor(getRandColor(1, 255));
// g.drawString(a,x,y);
// a為要畫出來的東西,x和y表示要畫的東西最左側字元的基線位於此圖形上下文座標系的 (x, y) 位置處
g.drawString(strRand, i*fontWidth+3, codeY);
}
}
// 得到隨機字元
private String randomStr(int n) {
String str1 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890";
String str2 = "";
int len = str1.length() - 1;
double r;
for (int i = 0; i < n; i++) {
r = (Math.random()) * len;
str2 = str2 + str1.charAt((int) r);
}
return str2;
}
// 得到隨機顏色
private Color getRandColor(int fc, int bc) {// 給定範圍獲得隨機顏色
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);
}
/**
* 產生隨機字型
*/
private Font getFont(int size) {
Random random = new Random();
Font font[] = new Font[5];
font[0] = new Font("Ravie", Font.PLAIN, size);
font[1] = new Font("Antique Olive Compact", Font.PLAIN, size);
font[2] = new Font("Fixedsys", Font.PLAIN, size);
font[3] = new Font("Wide Latin", Font.PLAIN, size);
font[4] = new Font("Gill Sans Ultra Bold", Font.PLAIN, size);
return font[random.nextInt(5)];
}
// 扭曲方法
private void shear(Graphics g, int w1, int h1, Color color) {
shearX(g, w1, h1, color);
shearY(g, w1, h1, color);
}
private void shearX(Graphics g, int w1, int h1, Color color) {
int period = random.nextInt(2);
boolean borderGap = true;
int frames = 1;
int phase = random.nextInt(2);
for (int i = 0; i < h1; 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 void shearY(Graphics g, int w1, int h1, 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, h1, 0, (int) d);
if (borderGap) {
g.setColor(color);
g.drawLine(i, (int) d, i, 0);
g.drawLine(i, (int) d + h1, i, h1);
}
}
}
public void write(OutputStream sos) throws IOException {
ImageIO.write(buffImg, "png", sos);
sos.close();
}
public BufferedImage getBuffImg() {
return buffImg;
}
public String getCode() {
return code.toLowerCase();
}
//使用方法
/*public void getCode3(HttpServletRequest req, HttpServletResponse response,HttpSession session) throws IOException{
// 設定響應的型別格式為圖片格式
response.setContentType("image/jpeg");
//禁止影象快取。
response.setHeader("Pragma", "no-cache");
response.setHeader("Cache-Control", "no-cache");
response.setDateHeader("Expires", 0);
CreateImageCode vCode = new CreateImageCode(100,30,5,10);
session.setAttribute("code", vCode.getCode());
vCode.write(response.getOutputStream());
}*/
}
原:http://www.cnblogs.com/feiyun126/p/4081254.html