package controller;
import org.springframework.stereotype.Controller;
import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
@Controller
public class YanZhengMaController {
@Autowired
private Producer captchaProducer;
//提交表单后验证的逻辑过程
@RequestMapping("/kaptcha.action")
public String kaptchaSuccess(String checkCode,HttpServletRequest request){
//从前台获得验证码框中的数据
String username=checkCode;
//从session中获得正确的验证码的值
String str = (String) request.getSession().getAttribute(com.google.code.kaptcha.Constants.KAPTCHA_SESSION_KEY);
//比较是否相同（相同怎么样，不相同怎么样，我这只是简单的输出，相不相同都跳转的succees.jsp中）
System.out.println(username+"---------"+str);
return "success";
}
//生成验证码的handler
@RequestMapping("/kaptcha.jpg")
//这个requestMapping中的值应该和web.xml中servlet中拦截的url相同，和jsp中表单中显示验证码图片的src相同
public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
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 ,把验证码的值存在session中
request.getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, 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();
}
return null;
}
/**
* @return the captchaProducer
*/
public Producer getCaptchaProducer() {
return captchaProducer;
}
/**
* @param captchaProducer the captchaProducer to set
*/
public void setCaptchaProducer(Producer captchaProducer) {
this.captchaProducer = captchaProducer;
}
}
