package?com.sy10;

import?com.sun.image.codec.jpeg.ImageFormatException;
import?com.sun.image.codec.jpeg.JPEGCodec;
import?com.sun.image.codec.jpeg.JPEGImageEncoder;

import?java.awt.*;
import?java.awt.image.BufferedImage;
import?java.io.*;
import?java.util.Random;

public?class?AuthCode?{
????public?static?final?int?AUTHCODE_LENGTH?=?4;		//驗證碼長度
????public?static?final?int?SINGLECODE_WIDTH?=?15;	//單個驗證碼寬度
????public?static?final?int?SINGLECODE_HEIGHT?=?24;	//單個驗證碼高度
????public?static?final?int?SINGLECODE_GAP?=?4;		//單個驗證碼之間間隔
????public?static?final?int?IMG_WIDTH?=?AUTHCODE_LENGTH?*?（SINGLECODE_WIDTH?+?SINGLECODE_GAP）;
????public?static?final?int?IMG_HEIGHT?=?SINGLECODE_HEIGHT;

????public?static?String?getAuthCode（）?{
????????String?authCode?=?““;
????????for（int?i?=?0;?i?????????????authCode?+=?（new?Random（））.nextInt（10）;
????????}
????????return?authCode;
????}

????public?static?BufferedImage?getAuthImg（String?authCode）?{
????????//設置圖片的高、寬、類型
????????//RGB編碼：red、green、blue
????????BufferedImage?img?=?new?BufferedImage（IMG_WIDTH?IMG_HEIGHT?BufferedImage.TYPE_INT_BGR）;
????????//得到圖片上的一個畫筆
????????Graphics?g?=?img.getGraphics（）;
????????//設置畫筆的顏色，用來做背景色
????????g.setColor（Color.YELLOW）;
????????//用畫筆來填充一個矩形，矩形的左上角坐標，寬，高
????????g.fillRect（0?0?IMG_WIDTH?IMG_HEIGHT）;
????????//將畫筆顏色設置為黑色，用來寫字
????????g.setColor（Color.BLACK）;
????????//設置字體：宋體、不帶格式的、字號
????????g.setFont（new?Font（“宋體“?Font.PLAIN?SINGLECODE_HEIGHT?+?5））;

????????//輸出數字
????????char?c;
????????for（int?i?=?0;?i?????????????//取到對應位置的字符
????????????c?=?authCode.charAt（i）;
????????????//畫出一個字符串：要畫的內容，開始的位置，高度
????????????g.drawString（c?+?““?i?*?（SINGLECODE_WIDTH?+?SINGLECODE_GAP）+?SINGLECODE_GAP?/?2?IMG_HEIGHT）;
????????}
????????Random?random?=?new?Random（）;
????????//干擾素
????????for（int?i?=?0;?i?????????????int?x?=?random.nextInt（IMG_WIDTH）;
????????????int?y?=?random.nextInt（IMG_HEIGHT）;
????????????int?x2?=?random.nextInt（IMG_WIDTH）;
????????????int?y2?=?random.nextInt（IMG_HEIGHT）;
????????????g.drawLine（x?y?x?+?x2?y?+?y2）;
????????}
????????return?img;
????}

????public?void?getImg（）?{
????????String?code?=?““;
????????int?intCode?=?（new?Random（））.nextInt（9999）;
????????if（intCode?????????????intCode?+=1000;
????????}
????????code?+=?intCode;

????????//設置圖片的高、寬、類型
????????//RGB編碼：red、green、blue
????????BufferedImage?image?=?new?BufferedImage（35?14?BufferedImage.TYPE_INT_BGR）;
????????//得到圖片上的一個畫筆
????????Graphics?g?=?image.getGraphics（）;
????????//設置畫筆的顏色，用來做背景色
????????g.setColor（Color.YELLOW）;
????????//用畫筆來填充一個矩形，矩形的左上角坐標為（11），寬為33，高為12
????????g.fillRect（1?1?33?12）;
????????//將畫筆顏色設置為黑色，用來寫字
????????g.setColor（Color.BLACK）;
????????//設置字體：宋體、不帶格式的、字號為12
????????g.setFont（new?Font（“宋體“?Font.PLAIN?12））;

????????//輸出數字
????????char?c;
????????for（int?i?=?0;?i?