Java网站登陆验证码的绘制类

标签：font图片inputadlstyle阶段checktext输出

package cn.itcast.itcaststore.utils;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* 生成验证码的工具类
*/
public class CheckImageServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
// 集合中保存所有成语
private List<String> words = new ArrayList<String>();
@Override
public void init() throws ServletException {
// 初始化阶段，读取new_words.txt
// web工程中读取文件，必须使用绝对磁盘路径
String path = getServletContext().getRealPath(\”/WEB-INF/new_words.txt\”);
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
new FileInputStream(path), \”utf-8\”));
String line;
while ((line = reader.readLine()) != null) {
words.add(line);
}
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 禁止缓存
//