基于ssm带验证码的登录注册
时间: 2023-10-20 13:05:52 浏览: 63
实现带验证码的登录注册功能,需要先搭建一个基于SSM(Spring+SpringMVC+MyBatis)框架的Web项目。
下面是实现的步骤:
1.在项目中添加验证码插件,推荐使用Kaptcha插件,可以在pom.xml中添加依赖:
```
<dependency>
<groupId>com.github.penggle</groupId>
<artifactId>kaptcha</artifactId>
<version>2.3.2</version>
</dependency>
```
2.在web.xml中配置KaptchaServlet:
```
<servlet>
<servlet-name>KaptchaServlet</servlet-name>
<servlet-class>com.google.code.kaptcha.servlet.KaptchaServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>KaptchaServlet</servlet-name>
<url-pattern>/kaptcha.jpg</url-pattern>
</servlet-mapping>
```
3.在登录页面和注册页面中添加验证码图片:
```
<img src="kaptcha.jpg" alt="验证码"/>
```
4.登录和注册时需要对验证码进行校验,可以在Controller中添加如下代码:
```
// 登录时校验验证码
String kaptcha = (String) request.getSession().getAttribute(com.google.code.kaptcha.Constants.KAPTCHA_SESSION_KEY);
if (!StringUtils.equals(code, kaptcha)) {
return "login";
}
// 注册时校验验证码
String kaptcha = (String) request.getSession().getAttribute(com.google.code.kaptcha.Constants.KAPTCHA_SESSION_KEY);
if (!StringUtils.equals(code, kaptcha)) {
return "register";
}
```
5.在登录和注册的Controller中添加对应的方法,比如:
```
@RequestMapping("/login")
public String login(String username, String password, String code, HttpSession session) {
// 校验验证码
String kaptcha = (String) session.getAttribute(com.google.code.kaptcha.Constants.KAPTCHA_SESSION_KEY);
if (!StringUtils.equals(code, kaptcha)) {
return "login";
}
// 登录逻辑
// ...
return "success";
}
@RequestMapping("/register")
public String register(String username, String password, String code, HttpSession session) {
// 校验验证码
String kaptcha = (String) session.getAttribute(com.google.code.kaptcha.Constants.KAPTCHA_SESSION_KEY);
if (!StringUtils.equals(code, kaptcha)) {
return "register";
}
// 注册逻辑
// ...
return "success";
}
```
通过以上步骤,就可以实现带验证码的登录注册功能了。需要注意的是,为了防止恶意攻击,需要设置验证码的过期时间,可以在web.xml中添加配置:
```
<init-param>
<param-name>kaptcha.textproducer.char.string</param-name>
<param-value>0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ</param-value>
</init-param>
<init-param>
<param-name>kaptcha.textproducer.char.length</param-name>
<param-value>4</param-value>
</init-param>
<init-param>
<param-name>kaptcha.textproducer.font.color</param-name>
<param-value>black</param-value>
</init-param>
<init-param>
<param-name>kaptcha.textproducer.font.size</param-name>
<param-value>30</param-value>
</init-param>
<init-param>
<param-name>kaptcha.textproducer.char.space</param-name>
<param-value>5</param-value>
</init-param>
<init-param>
<param-name>kaptcha.noise.impl</param-name>
<param-value>com.google.code.kaptcha.impl.NoNoise</param-value>
</init-param>
<init-param>
<param-name>kaptcha.background.clear.from</param-name>
<param-value>white</param-value>
</init-param>
<init-param>
<param-name>kaptcha.background.clear.to</param-name>
<param-value>white</param-value>
</init-param>
<init-param>
<param-name>kaptcha.image.width</param-name>
<param-value>100</param-value>
</init-param>
<init-param>
<param-name>kaptcha.image.height</param-name>
<param-value>40</param-value>
</init-param>
<init-param>
<param-name>kaptcha.session.key</param-name>
<param-value>KAPTCHA_SESSION_KEY</param-value>
</init-param>
<init-param>
<param-name>kaptcha.session.date</param-name>
<param-value>180</param-value>
</init-param>
```