web.xml:

xmlns="http://java.sun.com/xml/ns/javaee"

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

This is the description of my J2EE component

This is the display name of my J2EE component

ImageServlet

cn.hncu.img.ImageServlet

ImageServlet

/servlet/ImageServlet

index.jsp

xmlns="http://java.sun.com/xml/ns/javaee"

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

This is the description of my J2EE component

This is the display name of my J2EE component

ImageServlet

cn.hncu.img.ImageServlet

ImageServlet

/servlet/ImageServlet

index.jsp

ImageServlet.java

package cn.hncu.img;

import java.awt.Color;

import java.awt.Font;

import java.awt.Graphics;

import java.awt.image.BufferedImage;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.Date;

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;

public class ImageServlet extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

doPost(request, response);

}

public void doPost(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

//告诉客户端，输出的格式

response.setContentType("image/jpeg" alt="java图片验证码生成教程详解" title="java图片验证码生成教程详解" width="200" height="150">