package org.masque.qq.demo.util;
import java.awt.Color;
import java.awt.Font;
import java.awt.FontFormatException;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Random;
import java.util.Set;
import javax.imageio.ImageIO;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.stereotype.Service;
/**
* 验证码的生成
* @author
*
*/
@Service("validateUtil")
public class ValidateUtil {
//正确的验证码
private String trueValidate;
private List<String> allValidate;
private String trueIndex="";
//验证码的长度
private int validateLimit=4;
//可供选择的验证码个数
private int chooseNum=9;
private static Random random=new Random();
private static Font customFont = null;
public ValidateUtil() {
List<String> all = createFontsBylength(chooseNum); //创建9个字
Set<Integer> set=getRandomIndex(chooseNum); //四个随机数
String indexString="";
String rightString ="";
for(Integer it:set){
indexString +=it;
rightString +=all.get(it);
}
allValidate = new ArrayList<String>();
allValidate.add(rightString);
allValidate.addAll(all);
trueValidate = rightString;
trueIndex=indexString;
}
public void initValidate(){
trueValidate=createFont(4);
allValidate=getAllFont(trueValidate);
}
/**
* 生成一个汉字
* @return
*/
private String createFont() {
String str = "";
int hightPos, lowPos; // 定义高低位
hightPos = (176 + Math.abs(random.nextInt(39)));//获取高位值
lowPos = (161 + Math.abs(random.nextInt(93)));//获取低位值
byte[] b = new byte[2];
b[0] = (new Integer(hightPos).byteValue());
b[1] = (new Integer(lowPos).byteValue());
try {
str = new String(b, "GBk");//转成中文
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return str;
}
/**
* 生成指定长度的汉字
* @param length
* @return
*/
private String createFont(int length){
String all="";
Set<String> set=new HashSet<String>();
while(set.size()<length){
set.add(createFont());
}
for(String str:set){
all+=str;
}
return all;
}
/**
* 随机生成在可供选择验证码个数内的不重复索引
* @return
*/
private Set<Integer> getRandomIndex(){
Set<Integer> set=new HashSet<Integer>();
Random r=new Random();
while(set.size()<validateLimit){
int temp=r.nextInt(chooseNum+1);
if(temp!=0){
set.add(temp);
}
}
return set;
}
private Set<Integer> getRandomIndex(int number){
Set<Integer> set=new HashSet<Integer>();
Random r=new Random();
while(set.size()<validateLimit){
int temp=r.nextInt(number);
if(temp!=0){
set.add(temp);
}
}
return set;
}
/**
* 生成包括正确验证码在内的随机汉字
* @param str
* @return
*/
private List<String> getAllFont(String str){
List<String> list=new ArrayList<String>();
list.add(str);
String all=createFont(chooseNum);
for(int i=0;i<chooseNum;i++){
list.add(all.charAt(i)+"");
}
Set<Integer> set=getRandomIndex();
int index=0;
for(Integer it:set){
list.set(it, str.charAt(index++)+"");
trueIndex+=(it-1);
}
// System.out.println(trueIndex);
return list;
}
/**
* 返回正确的验证码索引
* @return
*/
public String getTrueIndex(){
return trueIndex;
}
/**
* 返回正确的验证码
* @return
*/
public String getTrueValidate(){
return trueValidate;
}
public void setTrueValidate(String trueValidate){
this.trueValidate = trueValidate;
}
/**
* 返回包含正确验证码的所有可选汉字
* @return
*/
public List<String> getValidateList(){
return allValidate;
}
/**
* 生成随机颜色
* @param fc 前景色
* @param bc 背景色
* @return Color对象，此Color对象是RGB形式的。
*/
private static 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);
}
/**
* 绘制干扰线
* @param g Graphics2D对象，用来绘制图像
* @param nums 干扰线的条数
*/
private static void drawRandomLines(Graphics2D g ,int nums,int width,int height ){
g.setColor(getRandomColor(160, 200)) ;
for(int i=0 ; i<nums ; i++){
int x1 = random.nextInt(width) ;
int y1 = random.nextInt(height);
int x2 = random.nextInt(12) ;
int y2 = random.nextInt(12) ;
g.drawLine(x1, y1, x1+x2, y1+y2) ;
}
}
/**
* 获取随机字符串，
* 此函数可以产生由大小写字母，汉字，数字组成的字符串
* @param length 随机字符串的长度
* @return 随机字符串
*/
@SuppressWarnings("unused")
private static void drawRandomString(String all, Graphics2D g){
int length=all.length();
for(int i=0 ; i<length ; i++){
Color color = new Color(20+random.nextInt(20) , 20+random.nextInt(20) ,20+random.nextInt(20) );
g.setColor(color) ;
//想文字旋转一定的角度
AffineTransform trans = new AffineTransform();
trans.rotate(random.nextInt(45)*3.14/180, 15*i+8, 7) ;
g.drawString(all.charAt(i)+"", 18*i+5, 30) ;
}
g.dispose() ;
}
/**
* 传人文字数组生成图片
* @param all
* @param g
*/
private static void drawRandomString1(List<String> all, Graphics2D g){
int length=all.size();
for(int i=0 ; i<length ; i++){
Color color = new Color(20+random.nextInt(20) , 20+random.nextInt(20) ,20+random.nextInt(20) );
g.setColor(color) ;
//想文字旋转一定的角度
AffineTransform trans = new AffineTransform();
trans.rotate(random.nextInt(45)*3.14/180, 15*i+8, 7) ;
if(i==0){
g.drawString(all.get(i), 15, 20) ;
}
if(i==1){
g.drawString(all.get(i), 18, 65) ;
}
if(i==2){
g.drawString(all.get(i), 70, 65) ;
}
if(i==3){
g.drawString(all.get(i), 115, 65) ;
}
if(i==4){
g.drawString(all.get(i), 18, 115) ;
}
if(i==5){
g.drawString(all.get(i), 70, 115) ;
}
if(i==6){
g.drawString(all.get(i), 115, 115) ;
}
if(i==7){
g.drawString(all.get(i), 18, 158) ;
}
if(i==8){
g.drawString(all.get(i), 70, 158) ;
}
if(i==9){
g.drawString(all.get(i), 115, 158) ;
}
}
g.dispose() ;
}
/**
* 将文字生成图片
* @param all
* @param os
* @throws IOException
* @throws FontFormatException
*/
public static void write(List<String> all,OutputStream os) throws FontFormatException, IOException{
BufferedImage image =new BufferedImage(145 , 180, BufferedImage.TYPE_INT_BGR) ;
Graphics2D g = image.createGraphics() ;
//定义字体样式
//Font myFont = new Font("", Font.BOLD, 16);
Font myFont = ValidateUtil.getFont();
myFont = myFont.deriveFont(Font.BOLD, 16);
//设置字体
g.setFont(myFont) ;
g.setColor(Color.WHITE) ;
//绘制背景
g.fillRect(0, 0, 145 , 180) ;
g.setColor(getRandomColor(180, 200)) ;
drawRandomLines(g, 50,90,25) ;
drawRandomString1(all, g) ;
g.dispose() ;
try {
ImageIO.write(image, "JPEG", os) ;
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
public static Font getFont() throws FontFormatException, IOException {
synchronized (ValidateUtil.class){
if(customFont == null){
Resource fontResource = new ClassPathResource("simhei.ttf");
customFont = Font.createFont(Font.TRUETYPE_FONT, fontResource.getInputStream());
}
}
return customFont;
}
/**
* 生成指定长度的汉字 存放在数组里面
* @param length
* @return
*/
private List<String> createFontsBylength(int length){
List<String> list = new ArrayList<String>();
for (int i = 0; i < length; i++) {
list.add(createFont());
}
return list;
}
}
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