ssm框架实现登录验证码
时间: 2023-10-17 14:12:53 浏览: 48
在SSM框架中实现登录验证码可以按照以下步骤进行:
1. 添加验证码的依赖:
在项目的`pom.xml`文件中添加以下依赖:
```xml
<dependency>
<groupId>com.github.penggle</groupId>
<artifactId>kaptcha</artifactId>
<version>2.3.2</version>
</dependency>
```
2. 配置验证码生成器:
在Spring的配置文件中,例如`springmvc.xml`,添加以下配置:
```xml
<bean id="captchaProducer" class="com.google.code.kaptcha.impl.DefaultKaptcha">
<property name="config">
<bean class="com.google.code.kaptcha.util.Config">
<constructor-arg>
<props>
<prop key="kaptcha.border">no</prop>
<prop key="kaptcha.image.width">120</prop>
<prop key="kaptcha.image.height">40</prop>
<prop key="kaptcha.textproducer.char.string">abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890</prop>
<prop key="kaptcha.textproducer.char.length">4</prop>
<prop key="kaptcha.textproducer.font.size">30</prop>
<prop key="kaptcha.noise.impl">com.google.code.kaptcha.impl.NoNoise</prop>
</props>
</constructor-arg>
</bean>
</property>
</bean>
```
3. 创建验证码Controller:
创建一个Controller类,用于生成验证码图片和验证用户输入的验证码:
```java
import com.google.code.kaptcha.Producer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;
@Controller
@RequestMapping("/captcha")
public class CaptchaController {
@Autowired
private Producer captchaProducer;
@GetMapping("/image")
public void getCaptchaImage(HttpServletRequest request, HttpServletResponse response) throws IOException {
response.setDateHeader("Expires", 0);
response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
response.addHeader("Cache-Control", "post-check=0, pre-check=0");
response.setHeader("Pragma", "no-cache");
response.setContentType("image/jpeg");
String capText = captchaProducer.createText();
request.getSession().setAttribute("captchaCode", capText);
BufferedImage bi = captchaProducer.createImage(capText);
ServletOutputStream out = response.getOutputStream();
ImageIO.write(bi, "jpg", out);
try {
out.flush();
} finally {
out.close();
}
}
@GetMapping("/verify")
@ResponseBody
public boolean verifyCaptcha(HttpServletRequest request, String captchaCode) {
String storedCaptchaCode = (String) request.getSession().getAttribute("captchaCode");
return captchaCode.equalsIgnoreCase(storedCaptchaCode);
}
}
```
4. 在登录页面使用验证码:
在登录页面的表单中添加验证码输入框和验证码图片展示,例如:
```html
<form action="/login" method="post">
<!-- 其他表单项 -->
<div>
<label>验证码:</label>
<input type="text" name="captchaCode" />
<img src="/captcha/image" onclick="this.src='/captcha/image?'+Math.random()" />
</div>
<button type="submit">登录</button>
</form>
```
这里的`/captcha/image`是生成验证码图片的接口地址,点击验证码图片时可以刷新验证码。
5. 在登录操作中验证验证码:
在登录的处理逻辑中,获取用户输入的验证码,并调用验证码验证接口进行验证,例如:
```java
@PostMapping("/login")
public String login(HttpServletRequest request, String username, String password,