mysql use show describe connect

Author: HelloListen

maven/CaptchaImageServlet.java

@@ -0,0 +1,44 @@
+package com.juvenxu.mvnbook.account.www;
+
+import com.juvenxu.mvnbook.account.service.AccountService;
+import com.juvenxu.mvnbook.account.service.AccountServiceException;
+import org.springframework.context.ApplicationContext;
+import org.springframework.web.context.support.WebApplicationContextUtils;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.OutputStream;
+
+/**
+ * Created by zhangbin on 16/2/14.
+ */
+public class CaptchaImageServlet extends HttpServlet {
+    private ApplicationContext context;
+    private static final long serialVersionUID = 5274323889605521606L;
+
+    @Override
+    public void init() throws ServletException {
+        super.init();
+        context = WebApplicationContextUtils.getWebApplicationContext(getServletContext());
+    }
+
+    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        String key = request.getParameter("key");
+        if (key == null || key.length() == 0) {
+            response.sendError(404, "No Captcha Key Found");
+        } else {
+            AccountService service = (AccountService) context.getBean("account-Service");
+            try {
+                response.setContentType("image/jpeg");
+                OutputStream out = response.getOutputStream();
+                out.write(service.generateCaptchaImage(key));
+                out.close();
+            } catch (AccountServiceException e) {
+                response.sendError(404, e.getMessage());
+            }
+        }
+    }
+}