package com.superscene.wbmsys.util;import java.util.Arrays;public class SecurityCode {    public enum SecurityCodeLevel {Simple,Medium,Hard};         public static String getSecurityCode(){         return getSecurityCode(4,SecurityCodeLevel.Medium,false);    }     public static String getSecurityCode(int length,SecurityCodeLevel level,boolean isCanRepeat){         int len=length;         char[] codes={'1','2','3','4','5','6','7','8','9',                       'a','b','c','d','e','f','g','h','i','j','k','m','n','p','q','r','s','t','u','v','w','x','y','z',                       'A','B','C','D','E','F','G','H','I','J','K','L','M','N','P','Q','R','S','T','U','V','W','X','Y','Z'};                  if(level==SecurityCodeLevel.Simple){             codes=Arrays.copyOfRange(codes, 0,9);         }else if(level==SecurityCodeLevel.Medium){             codes=Arrays.copyOfRange(codes, 0,33);         }         int n=codes.length;               if(len>n&&isCanRepeat==false){             throw new RuntimeException(                    String.format("创建验证码失败",                                    len,level,isCanRepeat,n));        }        char[] result=new char[len];        if(isCanRepeat){             for(int i=0;i
    

package com.superscene.wbmsys.util;import java.awt.Color;import java.awt.Font;import java.awt.Graphics;import java.awt.image.BufferedImage;import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.util.Random;import javax.imageio.ImageIO;public class SecurityImage {	public static BufferedImage createImage(String securityCode, int width, int height){				int codeLength = securityCode.length();        int fSize = 15;                BufferedImage image=new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);        Graphics g=image.createGraphics();        g.setColor(Color.WHITE);        g.fillRect(0, 0, width, height);        g.setColor(Color.LIGHT_GRAY);        g.setFont(new Font("Arial", Font.BOLD, height - 2));        g.drawRect(0, 0, width - 1, height -1);        Random rand = new Random();        g.setColor(Color.LIGHT_GRAY);        for(int i = 0;i < codeLength * 6;i++){        	int x = rand.nextInt(width);        	int y = rand.nextInt(height);        	g.drawRect(x, y, 1, 1);        }        int codeY = height - 6;          g.setColor(new Color(19,148,246));        g.setFont(new Font("Georgia", Font.BOLD, fSize));        for(int i = 0; i < codeLength;i++){        	g.drawString(String.valueOf(securityCode.charAt(i)), i * 12 + 3, codeY);        }        g.dispose();        return image;	}		public static ByteArrayInputStream getImageAsInputStream(String securityCode, int width, int height){		BufferedImage image = createImage(securityCode, width, height);        return convertImageToStream(image);    }		private static ByteArrayInputStream convertImageToStream(BufferedImage image){		ByteArrayInputStream inputStream = null;		ByteArrayOutputStream bos = new ByteArrayOutputStream();		try {			ImageIO.write(image, "JPEG", bos);			byte[] bts = bos.toByteArray();			inputStream = new ByteArrayInputStream(bts);		} catch (IOException e1) {			// TODO Auto-generated catch block			e1.printStackTrace();		}		return inputStream;	}}

@RequestMapping(params="method=getCheckCode",method=RequestMethod.GET)	public void getCheckCode(HttpServletRequest request, HttpServletResponse response, @RequestParam("time") String time) {    	String securityCode = SecurityCode.getSecurityCode(number, SecurityCodeLevel.Hard, false);     	request.getSession().setAttribute(Constants.USER_LOGIN_CODES, securityCode);    	BufferedImage image = SecurityImage.createImage(securityCode, width, height);         ServletOutputStream out = null;		try {			out = response.getOutputStream();			// 将图片转换为JPEG类型			//JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);			//encoder.encode(image);			// 输出图象到页面			ImageIO.write(image, "JPEG", response.getOutputStream());			out.flush();			//ServletActionContext.getPageContext().pushBody();			out.close(); 		} catch (IOException e) {			// TODO Auto-generated catch block			e.printStackTrace();		}    }