摘要:本篇介绍了Java语言学习——基于Java实现随机字母数字验证码,希望大家对Java的学习有更深入的理解。
本篇介绍了Java语言学习——基于Java实现随机字母数字验证码,希望大家对Java的学习有更深入的理解。
生成随机验证码
VerifyCode 工具类
package com.meeno.common.cerifycode;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Random;
/**
* @description: 随机验证码
* @author: Wzq
* @create: 2020-09-08 16:55
*/
public class VerifyCode {
private int w=70;
private int h=35;
private Random r= new Random();
private String[] fontNames={"宋体","华文楷体","黑体","微软雅黑","楷体_GB2312"};
private String codes="012345678901234567890123456789abcdefghijkmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ";
private Color bgColor = new Color(255,255,255);
private String text;
private Color randomColor(){
int red = r.nextInt(150);
int green = r.nextInt(150);
int blue = r.nextInt(150);
return new Color(red,green,blue);
} private Font randomFont(){
int index = this.r.nextInt(fontNames.length);
String fontName = fontNames[index]; int style = this.r.nextInt(4);
int size = this.r.nextInt(5) + 24;
return new Font(fontName, style, size);
} private void drawLine (BufferedImage image){
int num = 3;
Graphics2D g2=(Graphics2D)image.getGraphics(); for(int i=0;i<num;i++){
int x1=r.nextInt(w);
int y1=r.nextInt(h);
int x2=r.nextInt(w);
int y2=r.nextInt(h);
g2.setStroke(new BasicStroke(1.5F));
g2.setColor(Color.BLUE); g2.drawLine(x1,y1,x2,y2); } } private char randomChar(){
int index=r.nextInt(this.codes.length());
return this.codes.charAt(index);
} private BufferedImage createImage(){
BufferedImage image=new BufferedImage(this.w,this.h,BufferedImage.TYPE_INT_RGB);//BufferedImage.TYPE_INT_RGB
Graphics2D g2 = (Graphics2D)image.getGraphics();
g2.setColor(this.bgColor);
g2.fillRect(0,0,this.w,this.h);
return image;
}
public BufferedImage getImage(){
BufferedImage image=createImage();
Graphics2D g2=(Graphics2D)image.getGraphics();
StringBuilder sb&nbsp;= new StringBuilder();
for(int i =0;i<4;i++){
String s= randomChar()+"";
sb.append(s);
float x= i*1.0F*this.w/4.0F;
g2.setFont(randomFont());
g2.setColor(randomColor());
g2.drawString(s,x,this.h-5);
}
this.text=sb.toString();
drawLine(image);//添加干扰线
return image;
}
//返回验证码上的文本
public String getText(){
return this.text;
}
//保存图片到指定的输出流
public static void output(BufferedImage image, OutputStream out)
throws IOException {
ImageIO.write(image,"JPEG",out);
}
public static void main(String[] args) throws IOException {
VerifyCode vc=new VerifyCode();
BufferedImage bi = vc.getImage();
VerifyCode.output(bi,new FileOutputStream("E:\\work\\temp\\xxx.jpg"));
System.out.println("图片中的验证是:"+vc.getText());
}
}
使用
/**
* 生成随机验证码 */ @RequestMapping("randomVerifyCode.do")
public ResponseBean randomVerifyCode() throws IOException { VerifyCode vc = new VerifyCode(); BufferedImage bi = vc.getImage(); //VerifyCode.output(bi,response.getOutputStream());
ByteArrayOutputStream out = new ByteArrayOutputStream(); ImageIO.write(bi, "png", out);
byte[] bytes = out.toByteArray();
String str = Base64.encode(bytes); str = "data:image/png;base64," + str;
String uuid = IdUtil.simpleUUID(); Map<String,String> resultMap = Maps.newHashMap(); resultMap.put("base64", str);
resultMap.put("uuid", uuid);
//save redis String key = "RandomVerify:" + uuid;
RedisUtil.set(key, vc.getText(), 180);
return ResultUtil.success(resultMap);
}
验证方法
/**
* 账号登录
* @param session
* @param phone
* @param pwd
* @param entryType
* @return
*/
@RequestMapping("accountLogin.do")
public ResponseBean accountLogin(final HttpSession session, String phone, String pwd, String entryType,
String uuid, String randomCerifyCode){
//校验验证码
MeenoAssert.hasLength(randomCerifyCode,"randomCerifyCode can not empty!");
Object randomCerifyCodeObj = RedisUtil.get("RandomVerify:" + uuid);
MeenoAssert.notNull(randomCerifyCodeObj, CErrEnum.RANDOM_VERIFY_CODE_FAILURE);
MeenoAssert.isTrue(randomCerifyCode.toLowerCase().equals(randomCerifyCodeObj.toString().toLowerCase()), CErrEnum.RANDOM_VERIFY_CODE_ERR);
LoginResult loginResult = this.employeeService.accountLogin(session, phone, pwd, entryType);
EmpView employeeView = this.employeeService.getEmployee(loginResult.getUserInfo().getId());
Map<String,Object> resultMap = Maps.newHashMap();
resultMap.put("loginResult", loginResult);
resultMap.put("employee", employeeView);
return ResultUtil.success(resultMap);
}
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