【Java开源代码栏目提醒】:网学会员Java开源代码为您提供AuthImg.java参考,解决您在AuthImg.java学习中工作中的难题,参考学习。
package com.opensource.blog.web.servlet;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.laoer.comm.util.Util;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
public class AuthImg
extends HttpServlet {
private static final String CONTENT_TYPE = "text/html; charset=GBK";
private Font mFont = new Font("Times New Roman", Font.PLAIN, 12);
//Initialize global variables
public void init() throws ServletException {
}
//Process the HTTP Get request
public void doGet(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
String s = Util.genNumPassword(4);
HttpSession session = request.getSession();
session.setAttribute("authcode", s);
response.setContentType("image/jpeg");
ServletOutputStream out = response.getOutputStream();
BufferedImage image = new BufferedImage(35, 14, BufferedImage.TYPE_INT_RGB);
Graphics gra = image.getGraphics();
gra.setColor(Color.yellow);
gra.fillRect(1, 1, 33, 12);
gra.setColor(Color.black);
gra.setFont(mFont);
char c;
for (int i = 0; i < 4; i++) {
c = s.charAt(i);
gra.drawString(String.valueOf(c), i * 7 + 4, 11);
}
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
encoder.encode(image);
out.close();
}
//Process the HTTP Post request
public void doPost(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
doGet(request, response);
}
//Clean up resources
public void destroy() {
}
}
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