1. 编写工具类
package com.cn.beauty.util;
import org.slf4j.logger;
import org.slf4j.loggerfactory;
import javax.imageio.imageio;
import javax.servlet.http.httpservletrequest;
import javax.servlet.http.httpservletresponse;
import javax.servlet.http.httpsession;
import java.awt.*;
import java.awt.image.bufferedimage;
import java.util.arraylist;
import java.util.random;
public class randomvalidatecodeutil {
public static final string randomcodekey = "meishang-login-randomvalidatecodekey";//放到session中的key
private string randstring = "0123456789abcdefghijklmnopqrstuvwxyz";//随机产生数字与字母组合的字符串
private int width = 95;// 图片宽
private int height = 40;// 图片高
private int stringnum = 4;// 随机产生字符数量
private static final logger logger = loggerfactory.getlogger(randomvalidatecodeutil.class);
private random random = new random();
/**
* 获得字体
*/
private font getfont() {
return new font("wide latin", font.plain, 18);
}
/**
* 获得颜色(粉色为主)
*/
private color getrandcolor() {
arraylist<color> colors = new arraylist<color>();
colors.add(new color(241, 158, 194));
colors.add(new color(255, 94, 226));
colors.add(new color(255, 156, 177));
colors.add(new color(245, 152, 217));
colors.add(new color(255, 85, 81));
colors.add(new color(245, 152, 251));
int num = random.nextint(6);
return colors.get(num);
}
/**
* 生成随机图片
*/
public void getrandcode(httpservletrequest request, httpservletresponse response) {
httpsession session = request.getsession();
// bufferedimage类是具有缓冲区的image类,image类是用于描述图像信息的类
bufferedimage image = new bufferedimage(width, height, bufferedimage.type_int_bgr);
graphics g = image.getgraphics();// 产生image对象的graphics对象,改对象可以在图像上进行各种绘制操作
g.fillrect(0, 0, width, height);//图片大小
g.setfont(new font("wide latin", font.plain, 18));//字体大小
g.setcolor(getrandcolor());//字体颜色
// 添加噪点
float yawprate = 0.01f;// 噪声率
int area = (int) (yawprate * width * height);
for (int i = 0; i < area; i++) {
int x = random.nextint(width);
int y = random.nextint(height);
image.setrgb(x, y, random.nextint(255));
}
// 绘制随机字符
string randomstring = "";
for (int i = 1; i <= stringnum; i++) {
randomstring = drowstring(g, randomstring, i);
}
logger.info(randomstring);
//将生成的随机字符串保存到session中
session.removeattribute(randomcodekey);
session.setattribute(randomcodekey, randomstring);
g.dispose();
try {
// 将内存中的图片通过流动形式输出到客户端
imageio.write(image, "jpeg", response.getoutputstream());
} catch (exception e) {
logger.error("将内存中的图片通过流动形式输出到客户端失败>>>> ", e);
}
}
/**
* 绘制字符串
*/
private string drowstring(graphics g, string randomstring, int i) {
g.setfont(getfont());
g.setcolor(getrandcolor());
string rand = string.valueof(getrandomstring(random.nextint(randstring
.length())));
randomstring += rand;
g.translate(random.nextint(3), random.nextint(3));
g.drawstring(rand, 20 * (i - 1) + 3, 25);
return randomstring;
}
/**
* 获取随机的字符
*/
public string getrandomstring(int num) {
return string.valueof(randstring.charat(num));
}
}
2. 编写 controller 中的接口
/**
* @description 生成验证码
*/
@requestmapping(value = "/user/getverify")
public void getverify(httpservletrequest request, httpservletresponse response) {
try {
//设置相应类型,告诉浏览器输出的内容为图片
response.setcontenttype("image/jpeg");
//设置响应头信息，告诉浏览器不要缓存此内容
response.setheader("pragma", "no-cache");
response.setheader("cache-control", "no-cache");
response.setdateheader("expire", 0);
randomvalidatecodeutil randomvalidatecode = new randomvalidatecodeutil();
//输出验证码图片方法
randomvalidatecode.getrandcode(request, response);
} catch (exception e) {
log.error("获取验证码失败>>>>", e);
}
}
/**
* @description 校验验证码
*/
@postmapping("/user/checkverify")
public boolean checkverify(@requestparam string verifyinput, httpsession session) {
try {
// 从session中获取随机数
string inputstr = verifyinput;
string random = (string) session.getattribute("meishang-login-randomvalidatecodekey");
if (random == null) {
return false;
}
if (random.equalsignorecase(inputstr)) {
return true;
} else {
return false;
}
} catch (exception e) {
log.error("验证码校验失败", e);
return false;
}
}
3. 获取验证码图片
访问获取验证码接口
http://127.0.0.1:8605/user/getverify
效果如下
另一种方法
1.添加依赖
<dependency>
<groupid>com.github.penggle</groupid>
<artifactid>kaptcha</artifactid>
<version>2.3.2</version>
</dependency>
<dependency>
<groupid>org.springframework.boot</groupid>
<artifactid>spring-boot-starter-web</artifactid>
</dependency>
项目结构
2.全部代码
usercontroller
package com.yzm.config;
import java.util.hashmap;
import javax.annotation.resource;
import javax.servlet.http.httpservletrequest;
import javax.servlet.http.httpservletresponse;
import org.springframework.stereotype.controller;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.bind.annotation.requestparam;
import org.springframework.web.bind.annotation.responsebody;
import com.google.code.kaptcha.impl.defaultkaptcha;
import com.yzm.utils.util;
@controller
public class testcontroler {
@resource
private defaultkaptcha captchaproducer;
/**
* 登录验证码sessionkey
*/
public static final string login_validate_code = "login_validate_code";
/**
* 登录验证码图片
*/
@requestmapping(value = {"/loginvalidatecode"})
public void loginvalidatecode(httpservletrequest request, httpservletresponse response) throws exception{
util.validatecode(request,response,captchaproducer,login_validate_code);
}
/**
* 检查验证码是否正确
*/
@requestmapping("/checkloginvalidatecode")
@responsebody
public hashmap checkloginvalidatecode(httpservletrequest request,@requestparam("validatecode")string validatecode) {
string loginvalidatecode = request.getsession().getattribute(login_validate_code).tostring();
hashmap<string,object> map = new hashmap<string,object>();
if(loginvalidatecode == null){
map.put("status",null);//验证码过期
}else if(loginvalidatecode.equals(validatecode)){
map.put("status",true);//验证码正确
}else if(!loginvalidatecode.equals(validatecode)){
map.put("status",false);//验证码不正确
}
map.put("code",200);
return map;
}
}
package com.yzm.controller;
import java.util.properties;
import org.springframework.context.annotation.bean;
import org.springframework.stereotype.component;
import com.google.code.kaptcha.impl.defaultkaptcha;
import com.google.code.kaptcha.util.config;
@component
public class testconfig {
@bean
public defaultkaptcha getdefaultkaptcha() {
defaultkaptcha defaultkaptcha = new defaultkaptcha();
properties properties = new properties();
// 图片边框
properties.setproperty("kaptcha.border", "no");
// 边框颜色
properties.setproperty("kaptcha.border.color", "black");
//边框厚度
properties.setproperty("kaptcha.border.thickness", "1");
// 图片宽
properties.setproperty("kaptcha.image.width", "200");
// 图片高
properties.setproperty("kaptcha.image.height", "50");
//图片实现类
properties.setproperty("kaptcha.producer.impl", "com.google.code.kaptcha.impl.defaultkaptcha");
//文本实现类
properties.setproperty("kaptcha.textproducer.impl", "com.google.code.kaptcha.text.impl.defaulttextcreator");
//文本集合，验证码值从此集合中获取
properties.setproperty("kaptcha.textproducer.char.string", "01234567890");
//验证码长度
properties.setproperty("kaptcha.textproducer.char.length", "4");
//字体
properties.setproperty("kaptcha.textproducer.font.names", "宋体");
//字体颜色
properties.setproperty("kaptcha.textproducer.font.color", "black");
//文字间隔
properties.setproperty("kaptcha.textproducer.char.space", "5");
//干扰实现类
properties.setproperty("kaptcha.noise.impl", "com.google.code.kaptcha.impl.defaultnoise");
//干扰颜色
properties.setproperty("kaptcha.noise.color", "blue");
//干扰图片样式
properties.setproperty("kaptcha.obscurificator.impl", "com.google.code.kaptcha.impl.waterripple");
//背景实现类
properties.setproperty("kaptcha.background.impl", "com.google.code.kaptcha.impl.defaultbackground");
//背景颜色渐变，结束颜色
properties.setproperty("kaptcha.background.clear.to", "white");
//文字渲染器
properties.setproperty("kaptcha.word.impl", "com.google.code.kaptcha.text.impl.defaultwordrenderer");
config config = new config(properties);
defaultkaptcha.setconfig(config);
return defaultkaptcha;
}
}
util
package com.yzm.utils;
import java.awt.image.bufferedimage;
import javax.imageio.imageio;
import javax.servlet.servletoutputstream;
import javax.servlet.http.httpservletrequest;
import javax.servlet.http.httpservletresponse;
import com.google.code.kaptcha.impl.defaultkaptcha;
public class util {
/**
* 生成验证码图片
* @param request 设置session
* @param response 转成图片
* @param captchaproducer 生成图片方法类
* @param validatesessionkey session名称
* @throws exception
*/
public static void validatecode(httpservletrequest request, httpservletresponse response, defaultkaptcha captchaproducer, string validatesessionkey) throws exception{
// set to expire far in the past.
response.setdateheader("expires", 0);
// set standard http/1.1 no-cache headers.
response.setheader("cache-control", "no-store, no-cache, must-revalidate");
// set ie extended http/1.1 no-cache headers (use addheader).
response.addheader("cache-control", "post-check=0, pre-check=0");
// set standard http/1.0 no-cache header.
response.setheader("pragma", "no-cache");
// return a jpeg
response.setcontenttype("image/jpeg");
// create the text for the image
string captext = captchaproducer.createtext();
// store the text in the session
request.getsession().setattribute(validatesessionkey, captext);
// create the image with the text
bufferedimage bi = captchaproducer.createimage(captext);
servletoutputstream out = response.getoutputstream();
// write the data out
imageio.write(bi, "jpg", out);
try {
out.flush();
} finally {
out.close();
}
}
}
以上就是springboot 图形验证码的生成和校验的详细内容，更多关于springboot 验证码的生成和校验的资料请关注www.887551.com其它相关文章！
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