本章简单介绍redis的配置及使用方法,本文示例代码在前面代码的基础上进行修改添加,实现了使用redis进行缓存验证码,以及校验验证码的过程。
1、添加依赖库(添加redis库,以及第三方的验证码库)
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<dependency>
<groupid>org.springframework.boot</groupid>
<artifactid>spring-boot-starter-redis</artifactid>
</dependency>
<dependency>
<groupid>cn.apiclub.tool</groupid>
<artifactid>simplecaptcha</artifactid>
<version> 1.2 . 2 </version>
</dependency>
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2、在application.properties中添加redis的配置信息
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spring.redis.database= 4
spring.redis.host=hostname
spring.redis.password=password
spring.redis.port= 6379
spring.redis.timeout= 2000
spring.redis.pool.max-idle= 8
spring.redis.pool.min-idle= 0
spring.redis.pool.max-active= 8
spring.redis.pool.max-wait=- 1
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3、添加redis数据模版
新增redisconfig.java
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package com.xiaofangtech.sun.config;
import org.springframework.context.annotation.bean;
import org.springframework.data.redis.connection.redisconnectionfactory;
import org.springframework.data.redis.connection.jedis.jedisconnectionfactory;
import org.springframework.data.redis.core.redistemplate;
import org.springframework.data.redis.serializer.stringredisserializer;
public class redisconfig {
@bean
jedisconnectionfactory jedisconnectionfactory() {
return new jedisconnectionfactory();
}
@bean redistemplate<string, string>redistemplate(redisconnectionfactory factory)
{
redistemplate<string, string> template = new redistemplate<string, string>();
template.setconnectionfactory(jedisconnectionfactory());
template.setkeyserializer( new stringredisserializer());
template.setvalueserializer( new stringredisserializer());
return template;
}
}
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4、redis的基本使用(缓存生成的验证码信息)
新建captchamodule.java,涉及redis插入操作关键代码
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@autowired
private redistemplate<string, string> redistemplate;
//将验证码以<key,value>形式缓存到redis
redistemplate.opsforvalue().set(uuid, captcha.getanswer(), captchaexpires, timeunit.seconds);
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完整代码
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package com.xiaofangtech.sunt.utils;
import java.io.bytearrayoutputstream;
import java.io.ioexception;
import java.util.uuid;
import java.util.concurrent.timeunit;
import javax.imageio.imageio;
import javax.servlet.http.cookie;
import javax.servlet.http.httpservletresponse;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.data.redis.core.redistemplate;
import org.springframework.http.mediatype;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.bind.annotation.requestmethod;
import org.springframework.web.bind.annotation.responsebody;
import org.springframework.web.bind.annotation.restcontroller;
import cn.apiclub.captcha.captcha;
import cn.apiclub.captcha.backgrounds.gradiatedbackgroundproducer;
import cn.apiclub.captcha.gimpy.fisheyegimpyrenderer;
@restcontroller
@requestmapping ( "captcha" )
public class captchamodule {
@autowired
private redistemplate<string, string> redistemplate;
private static int captchaexpires = 3 * 60 ; //超时时间3min
private static int captchaw = 200 ;
private static int captchah = 60 ;
@requestmapping (value = "getcaptcha" , method = requestmethod.get, produces = mediatype.image_png_value)
public @responsebody byte [] getcaptcha(httpservletresponse response)
{
//生成验证码
string uuid = uuid.randomuuid().tostring();
captcha captcha = new captcha.builder(captchaw, captchah)
.addtext().addbackground( new gradiatedbackgroundproducer())
.gimp( new fisheyegimpyrenderer())
.build();
//将验证码以<key,value>形式缓存到redis
redistemplate.opsforvalue().set(uuid, captcha.getanswer(), captchaexpires, timeunit.seconds);
//将验证码key,及验证码的图片返回
cookie cookie = new cookie( "captchacode" ,uuid);
response.addcookie(cookie);
bytearrayoutputstream bao = new bytearrayoutputstream();
try {
imageio.write(captcha.getimage(), "png" , bao);
return bao.tobytearray();
} catch (ioexception e) {
return null ;
}
}
}
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5、redis内容的获取(根据key获取验证码)
完善前面获取token的流程,在获取token的接口中添加校验验证码的流程(根据登录参数中的验证码id获取验证码内容,并与登录参数中的验证码内容进行比对)
修改jsonwebtoken.java
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@autowired
private redistemplate<string, string> redistemplate;
//验证码校验在后面章节添加
string captchacode = loginpara.getcaptchacode();
try {
if (captchacode == null )
{
throw new exception();
}
string captchavalue = redistemplate.opsforvalue().get(captchacode);
if (captchavalue == null )
{
throw new exception();
}
redistemplate.delete(captchacode);
if (captchavalue.compareto(loginpara.getcaptchavalue()) != 0 )
{
throw new exception();
}
} catch (exception e) {
resultmsg = new resultmsg(resultstatuscode.invalid_captcha.geterrcode(),
resultstatuscode.invalid_captcha.geterrmsg(), null );
return resultmsg;
}
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6、测试
1)请求获取验证码,可以获取到验证码图片,以及在cookie中返回缓存入redis的key值
2)查看redis,可以查看到之前缓存的key value
3)登录获取token时,添加验证码参数
如果验证码错误,返回验证码错误
验证码正确,且用户名密码正确,返回token
总结
以上所述是小编给大家介绍的实例详解spring boot实战之redis缓存登录验证码,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持!
原文链接:http://blog.csdn.net/sun_t89/article/details/51944252