项目初始导入

src/main/java/com/nis/web/controller/CaptchaProducerController.java

@@ -0,0 +1,66 @@
+package com.nis.web.controller;
+
+import java.awt.image.BufferedImage;
+import java.io.IOException;
+
+import javax.imageio.ImageIO;
+import javax.servlet.ServletOutputStream;
+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 CaptchaProducerController {
+	@Autowired
+	private Producer captchaProducer;
+	
+	
+	@RequestMapping("captcha-image")
+	public ModelAndView handleRequest(HttpServletRequest request,HttpServletResponse response) throws IOException{
+		
+		  // 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(Constants.KAPTCHA_SESSION_KEY, capText.toUpperCase());
+
+        // 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;
+	}
+	
+
+}