springboot 제어 층 이미지 인증 코드 생 성

package com.zl.util; 
 
import java.awt.Color; 
import java.awt.Font; 
import java.awt.Graphics; 
import java.awt.image.BufferedImage; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.io.OutputStream; 
import java.util.Random; 
 
import javax.imageio.ImageIO; 
 
/** 
 * @author ZZC 
 * @date 2017 11 6  
 * @param 
 * @desc         
 * 
 */ 
public class VerifyUtil { 
 //        
  private static final char[] chars = {  
   '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',  
   'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 
   'o', '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',  
   'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'}; 
  //      
  private static final int SIZE = 4; 
  //       
  private static final int LINES = 5; 
  //    
  private static final int WIDTH = 80; 
  //    
  private static final int HEIGHT = 40; 
  //      
  private static final int FONT_SIZE = 30; 
 
  /** 
   *            
   * Object[0]：      ； 
   * Object[1]：     。 
   */ 
  public static Object[] createImage() { 
   StringBuffer sb = new StringBuffer(); 
   // 1.       
   BufferedImage image = new BufferedImage( 
     WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB); 
   // 2.       
   Graphics graphic = image.getGraphics(); 
   // 3.       
   graphic.setColor(Color.LIGHT_GRAY); 
   // 4.       
   graphic.fillRect(0, 0, WIDTH, HEIGHT); 
   // 5.      
   Random ran = new Random(); 
   for (int i = 0; i <SIZE; i++) { 
    //         
    int n = ran.nextInt(chars.length); 
    //        
    graphic.setColor(getRandomColor()); 
    //        
    graphic.setFont(new Font( 
      null, Font.BOLD + Font.ITALIC, FONT_SIZE)); 
    //     
    graphic.drawString( 
      chars[n] + "", i * WIDTH / SIZE, HEIGHT*2/3); 
    //      
    sb.append(chars[n]); 
   } 
   // 6.     
   for (int i = 0; i < LINES; i++) { 
    //        
    graphic.setColor(getRandomColor()); 
    //      
    graphic.drawLine(ran.nextInt(WIDTH), ran.nextInt(HEIGHT), 
      ran.nextInt(WIDTH), ran.nextInt(HEIGHT)); 
   } 
   // 7.         
   return new Object[]{sb.toString(), image}; 
  } 
 
  /** 
   *      
   */ 
  public static Color getRandomColor() { 
   Random ran = new Random(); 
   Color color = new Color(ran.nextInt(256),  
     ran.nextInt(256), ran.nextInt(256)); 
   return color; 
  } 
 
  public static void main(String[] args) throws IOException { 
   Object[] objs = createImage(); 
   BufferedImage image = (BufferedImage) objs[1]; 
   OutputStream os = new FileOutputStream("d:/1.png"); 
   ImageIO.write(image, "png", os); 
   os.close(); 
  } 
} 

/** 
  * @author ZZC 
  * @date 2017 11 6  
  * @param 
  * @desc           
  * 
  */ 
 @RequestMapping("/valicode") 
 public void valicode(HttpServletResponse response,HttpSession session) throws Exception{ 
  //           
  //            ，            
  Object[] objs = VerifyUtil.createImage(); 
  //      Session 
  session.setAttribute("imageCode",objs[0]); 
   
  //          
  BufferedImage image = (BufferedImage) objs[1]; 
  response.setContentType("image/png"); 
  OutputStream os = response.getOutputStream(); 
  ImageIO.write(image, "png", os); 
 }