src/main/java/com/yuanlrc/base/controller/common/CpachaController.java

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package com.yuanlrc.base.controller.common;

import java.io.IOException;

import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;

import com.yuanlrc.base.util.CpachaUtil;

/**
 * 系统验证码公用控制器
 * @author Administrator
 *
 */
@Controller
@RequestMapping("/cpacha")
public class CpachaController {

	private Logger log = LoggerFactory.getLogger(CpachaController.class);
	
	/**
	 * 通用验证码生成器
	 * @param vcodeLength
	 * @param fontSize
	 * @param width
	 * @param height
	 * @param method
	 * @param request
	 * @param response
	 */
	@RequestMapping(value="/generate_cpacha",method=RequestMethod.GET)
	public void generateCpacha(
			@RequestParam(name="vl",defaultValue="4")Integer vcodeLength,//vcodeLength,验证码长度
			@RequestParam(name="fs",defaultValue="21")Integer fontSize,//fontSize,验证码字体大小
			@RequestParam(name="w",defaultValue="98")Integer width,//width,图片宽度
			@RequestParam(name="h",defaultValue="33")Integer height,//height,图片高度
			@RequestParam(name="method",defaultValue="admin_login")String method,//用来调用此方法的名称，以此名称为键，存入到session中
			HttpServletRequest request,
			HttpServletResponse response){
		CpachaUtil cpachaUtil = new CpachaUtil(vcodeLength,fontSize,width,height);
		String generatorVCode = cpachaUtil.generatorVCode();
		//将生成的验证码放入session，以供放后面程序的验证使用
		request.getSession().setAttribute(method, generatorVCode);
		log.info("验证码成功生成，method=" + method + ",value=" + generatorVCode);
		try {
			ImageIO.write(cpachaUtil.generatorRotateVCodeImage(generatorVCode, true), "gif", response.getOutputStream());
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}