帮忙解决图形验证码问题

[jesse8013]

两个页面
验证码页面 image.jsp
单独使用 可以很正常 contentType="image/jpeg"
注册页面 register.jsp
contentType="text/html; charset=gb2312"
单独使用 ,很正常
但是我把 image.jsp 加到 register.jsp的时候就不行了
我试了两种方法
<%@ include file="image.jsp" model="true"%>
<%@ include file="image.jsp" Model="true"%>
<%@ include file="image.jsp" %>
这样都不行
出的错误是一样的
"register.jsp": org.apache.jasper.JasperException: file:E:/myporject/school/SchoolModel/image.jsp(1,1) Page directive: illegal to have multiple occurrences of contentType with different values (old: text/html; charset=gb2312, new: image/jpeg)

我的web.xml 的配置
<jsp-config>
<jsp-property-group>
<description>htmls encoding example</description>
<display-name>JSPConfiguration</display-name>
<url-pattern>*.jsp</url-pattern>
<url-pattern>*.html</url-pattern>
<el-ignored>true</el-ignored>
<page-encoding>gb2312</page-encoding>
<scripting-invalid>false</scripting-invalid>
</jsp-property-group>
</jsp-config>
但是似乎对我的页面 没什么影响
我还是得手动添加

contentType="text/html; charset=gb2312"
才能解决乱码问题
我的环境jbuilder tomcat 5 +j2se 1.5
哪位知道怎么解决的麻烦说一下
谢了

[coolmomo]

package com.dev.servlet;

import java.io.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.image.BufferedImage;

import javax.servlet.*;
import javax.servlet.http.*;

import com.sun.image.codec.jpeg.*;
import com.sun.image.codec.jpeg.JPEGCodec;

import com.dev.util.Picture;
import com.dev.log.Log;

public class CreatePicture
extends HttpServlet {

static final private String CONTENT_TYPE = "text/html; charset=gb2312";

final String input_back_color_error = "input rgb backcolor is error";

final String input_fore_color_error = "input rgb forecolor is error";

private Picture pic = new Picture();

//Initialize global variables
public void init() throws ServletException {

}

//Process the HTTP Get reques
public void doGet(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {

try {
int imageWidth = 30;
int imageHeight = 17;

BufferedImage image = new BufferedImage(imageWidth, imageHeight,
BufferedImage.TYPE_INT_RGB);
Graphics graphics = image.getGraphics();
graphics.setColor(new Color(171, 213, 247));
graphics.fillRect(0, 0, imageWidth, imageHeight);
graphics.setColor(new Color(171, 213, 247));

FileOutputStream fos = new FileOutputStream("attach.jpg");
BufferedOutputStream bos = new BufferedOutputStream(fos);
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(bos);
encoder.encode(image);
bos.close();

}
catch (Exception e) {
System.out.println("生成图片出错！");
e.printStackTrace();
}

/* String queryNum = request.getParameter("Image");
String queryRgb = "";

if (request.getParameter("Rgb") != null) {
queryRgb = request.getParameter("Rgb");
} */

try {
String queryNum = pic.getRandom(); //随机生成的附加码
String queryRgb = "255|0|0";

response.setHeader("Cache-Control", "no-store");
response.setContentType("image/jpeg");
ServletOutputStream out = response.getOutputStream();

//jpg格式的背景色图片（于页面风格一样），宽3.6毫米，高1.8毫米
InputStream imageIn = new FileInputStream(new File("attach.jpg"));

JPEGImageDecoder decoder = JPEGCodec.createJPEGDecoder(imageIn);
BufferedImage image4 = decoder.decodeAsBufferedImage();

//解密
//queryNum = pic.discrypt(queryNum);

HttpSession session = request.getSession(true);
session.setAttribute("AdditiveNo", queryNum);

Graphics g = image4.getGraphics();
if (queryRgb.length() > 1) {
if (pic.masterData(queryRgb) != null) {
int[] arg = pic.masterData(queryRgb);
g.setColor(new Color(arg[0], arg[1], arg[2]));
}
}
else {
g.setColor(new Color(255, 0, 0));
}

g.drawString(queryNum, 0, 13);
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
encoder.encode(image4);
out.close();
}
catch (Exception ex) {
ex.printStackTrace();
try {
Log.log("\r\n" + this.getClass() + ":" + ex.toString());
}
catch (Exception ex1) {}

}

}
}

[coolmomo]

package com.dev.util;

import java.io.*;

public class Picture {

final int key = 1;

final String error_format_int =
"format of color is not rgb.sample \"212|232|0\"";

final String error_color_input =
"format of color(num|num|num): num in 0-255";

/**格式化输出数据**/
public String manage(String temp) {
String returnStr = "";
temp = encrypt(temp);

byte[] by = temp.getBytes();

for (int i = 0; i < by.length; i++) {
returnStr = returnStr + (byte) by[i] + "|";
}
return returnStr;
}

/**格式化输入数据**/
public byte[] disManage(String temp) {
int len = 0, index = 0, i = 0, first = 0;

while ( (i = temp.indexOf("|", first)) > -1) {
len++;
first = i + 1;
}

byte[] by = new byte[len];
first = 0;
while ( (i = temp.indexOf("|", first)) > -1) {
by[index] = Byte.parseByte(temp.substring(first, i));
index++;
first = i + 1;
}
return by;
}

/**随机生成四位的附加码**/
public String getRandom() {
int i1 = (int) (java.lang.Math.random() * 10);
int i2 = (int) (java.lang.Math.random() * 10);
int i3 = (int) (java.lang.Math.random() * 10);
int i4 = (int) (java.lang.Math.random() * 10);

return String.valueOf(i1) + String.valueOf(i2) + String.valueOf(i3) +
String.valueOf(i4);
}

/**加密1：错位处理**/
public String encrypt(String randomStr) {
String para = random() + randomStr.substring(0, 1) + random() + random() +
randomStr.substring(1, 2);
para = para + random() + randomStr.substring(2);
return jiaMi(para);
}

/**得到随机数0-9之间**/
private String random() {
String temp = String.valueOf( (int) (java.lang.Math.random() * 10));

return temp;
}

/**加密2：加密处理，此方法可以自己修改**/
private String jiaMi(String str) {

byte[] by = str.getBytes();
ByteArrayInputStream in = new ByteArrayInputStream(by);

int ch;
int index = 0;
byte[] temp = new byte[in.available()];

while ( (ch = in.read()) != -1) {
temp[index] = (byte) (ch - key);
index++;
}

ByteArrayInputStream ins = new ByteArrayInputStream(temp);
BufferedReader fReader = new BufferedReader(new InputStreamReader(ins));

try {
return fReader.readLine();
}
catch (Exception e) {
e.printStackTrace();
return "";
}

}

/**从给的数字里得到正确的数字**/
public String discrypt(String temp) {
String para = jieMi(disManage(temp));
return para.substring(1, 2) + para.substring(4, 5) +
para.substring(6, 8);
}

/**解密处理**/
private String jieMi(byte[] by) {

ByteArrayInputStream in = new ByteArrayInputStream(by);
int ch;
int index = 0;
byte[] temp = new byte[in.available()];

while ( (ch = in.read()) != -1) {
temp[index] = (byte) (ch + key);
index++;
}

ByteArrayInputStream ins = new ByteArrayInputStream(temp);
BufferedReader fReader = new BufferedReader(new InputStreamReader(ins));

try {
return fReader.readLine();
}
catch (Exception e) {
e.printStackTrace();
return "";
}

}

/**分解rgb格式的颜色 num|num|num**/
public int[] masterData(String temp) {

int index_len = 0, index = 0, next_index = 0;
int[] return_arr = new int[3];
boolean break_error = false;

if (getMax(temp, "|") == 2) {
while ( (index_len = temp.indexOf("|", next_index)) > -1) {
if (getInt(temp.substring(next_index, index_len)) == 256) {
break_error = true;
}
else {
return_arr[index] = getInt(temp.substring(next_index,
index_len));
next_index = index_len + 1;
index++;
}
if (break_error) {
break;
}
}

if (break_error) {
return null;
}
else {
return_arr[index] = getInt(temp.substring(next_index));
return return_arr;
}
}
else {
System.out.println(error_format_int + ":" + temp);
return null;
}
}

private int getMax(String temp, String temp2) {
int index = 0, index_len = 0, index_next = 0;

while ( (index = temp.indexOf(temp2, index_next)) > -1) {
index_len++;
index_next = index + 1;
}

return index_len;
}

private int getInt(String temp) {
try {
return Integer.parseInt(temp);
}
catch (Exception e) {
e.printStackTrace();
System.out.println(error_color_input + ":" + temp);
return 256;
}
}
}

[coolmomo]

上面两个类是封装好的.拿来就可以用.

[Marcus-Z]

package org.epilot.toolkit.jpeg;
这个自己改改，改成自己要放到那个包就可以了

[Marcus-Z]

验证码最好用servlet

[jesse8013]

那怎么把servlet的验证吗添加到 jsp中了?
难道要我的登陆页面都用servlet吗?

[jesse8013]

而且servlet中也存在
contentType 的问题啊

[Marcus-Z]

package org.epilot.toolkit.jpeg;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import java.awt.*;
import java.awt.image.*;
import org.epilot.toolkit.log.Log;
import org.epilot.toolkit.servlet.ServletUtil;

/**
* <p>Title: @</p>
*
* <p>Description: Generate the jpeg image and output it to the
* stream, such as web page stream.</p>
*
* <p>Copyright: Copyright (c) 2004</p>
*
* <p>Company: Snail CO. LTD</p>
*
* @author not attributable
* @version 1.0
*/

public class ImageServlet
extends HttpServlet {
public static final String CONTENT_TYPE = "image/jpeg; charset=GBK";
public static final String IMAGEINFO_ECHO = "randomImage";

// initialize global variables
private OutputStream out;
private Object imageInfo;

public void init() throws ServletException {
}

/**
* Process the HTTP Get request
* @param request HttpServletRequest
* @param response HttpServletResponse
* @throws ServletException
* @throws IOException
*/
public void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException,
IOException {
response.setContentType(CONTENT_TYPE);
//设置页面不缓存
response.setHeader("Pragma", "No-cache");
response.setHeader("Cache-Control", "no-cache");
response.setDateHeader("Expires", 0);

HttpSession session = request.getSession(true);
String paramName = ServletUtil.getParamValue(request, "paramName");

this.out = response.getOutputStream();
this.imageInfo = outputImage(out);
if(paramName.length() <= 0) {
session.setAttribute(IMAGEINFO_ECHO, this.imageInfo);
} else {
session.setAttribute(paramName, this.imageInfo);
}
}

/**
* Clean up resources
*/
public void destroy() {
}

/**
* 输出图象
* @param os OutputStream
* @return Object
* @throws IOException
*/
public Object outputImage(OutputStream os) throws IOException {
Random rand = new Random();

Dimension size = new Dimension(60, 20);
BufferedImage image = new BufferedImage(size.width,
size.height,
BufferedImage.TYPE_INT_RGB);

// 获取图形上下文
Graphics imageG2D = image.getGraphics();

// 设定背景色
Color background = new Color(255, 255, 255);
imageG2D.setColor(background);
imageG2D.fillRect(0, 0, size.width, size.height);

//设定字体
imageG2D.setFont(new Font("Times New Roman", Font.PLAIN, 18));

//画边框
imageG2D.setColor(randomRGBColor(100, 50));
imageG2D.drawRect(0, 0, size.width-1, size.height-1);

// 随机产生100 个干扰点
imageG2D.setColor(randomRGBColor(160, 40));
for (int i = 0; i < 100; i++) {
int x = rand.nextInt(size.width);
int y = rand.nextInt(size.height);
int w = rand.nextInt(4);
int d = rand.nextInt(4);
imageG2D.fillOval(x, y, w, d);
}

// 取随机产生的认证码(4位数字)
String verifyCode = "";
for (int i = 0; i < 4; i++) {
String digit = String.valueOf(rand.nextInt(10));
verifyCode += digit;
// 将认证码显示到图象中
Color fontColor = randomRGBColor(20, 110);
imageG2D.setColor(fontColor);
imageG2D.drawString(digit, 13 * i + 6, 16);
}

// 图象生效，释放资源
imageG2D.dispose();

// 输出图象到页面
javax.imageio.ImageIO.write(image, "JPEG", os);
// outputJpeg(image, os);

return verifyCode;

}

/**
* Translate the image into the jpeg stream
* @param theImage Image
* @param os OutputStream
*/
private void outputJpeg(Image theImage, OutputStream os) {
try {
JpegEncoder je = new JpegEncoder(theImage, 90, os);
je.Compress();

}
catch (Exception e) {
Log.error(e, "Error in generating the jpeg image.");
}
}

/**
*
* @param base int
* @param step int
* @return Color
*/
private Color randomRGBColor(int base, int step) { //给定范围获得随机颜色
Random random = new Random();
int r = base + random.nextInt(step);
int g = base + random.nextInt(step);
int b = base + random.nextInt(step);
if (r > 255) r = 255;
if (g > 255) g = 255;
if (b > 255) b = 255;
return new Color(r, g, b);
}

}


这个是servlet
然后在页面里

<img src="/common/ImageServlet?paramName=eaiLoginVCode" style="vertical-align: bottom" alt="">

你这样看看。我感觉这样比较好些，

[jesse8013]

我使用
<img src="image.jsp ">
也可以了
但是图片不会变
这是为什么??

[jesse8013]

还有
package org.epilot.toolkit.jpeg;
这个是什么包?