Java中图片隐藏代码 java中图片隐藏代码是什么

java 编程 eclipse 怎么显示隐藏代码？

eclipse显示被隐藏的文件或文件夹 

稷山网站制作公司哪家好，找创新互联！从网页设计、网站建设、微信开发、APP开发、响应式网站设计等网站项目制作，到程序开发，运营维护。创新互联于2013年成立到现在10年的时间，我们拥有了丰富的建站经验和运维经验，来保证我们的工作的顺利进行。专注于网站建设就选创新互联。

点击左边导航(Navigator或者PackageExplorer等)右上角的小三角 - Filters 

点击需要显示文件，让复选框处于非选中状态。

在java中如何用类来实现图片的渐隐渐入不用javaScript

淡入淡出Swing组件

/**

* 淡入淡出式显示内容组件的容器

* @author William Chen

*/

public class GlassBox extends JComponent implements ActionListener{

//常数定义

private static final int ANIMATION_FRAMES=50;

private static final int ANIMATION_INTERVAL=10;

//帧索引

private int frameIndex;

//时钟

private Timer timer;

/** Creates a new instance of GlassBox */

public GlassBox() {

}

public void paint(Graphics g){

if(isAnimating()){

//根据当前帧显示当前透明度的内容组件

float alpha=(float)frameIndex/(float)ANIMATION_FRAMES;

Graphics2D g2d=(Graphics2D)g;

g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha));

//Renderer渲染机制

super.paint(g2d);

}else{

//如果是第一次，启动动画时钟

frameIndex=0;

timer=new Timer(ANIMATION_INTERVAL, this);

timer.start();

}

}

//判断当前是否正在进行动画

private boolean isAnimating(){

return timer!=null timer.isRunning();

}

//关闭时钟，重新初始化

private void closeTimer() {

if(isAnimating()){

timer.stop();

frameIndex=0;

timer=null;

}

}

//动画时钟处理事件

public void actionPerformed(ActionEvent e) {

//前进一帧

frameIndex++;

if(frameIndex=ANIMATION_FRAMES)

//最后一帧，关闭动画

closeTimer();

else//更新当前一帧

repaint();

}

}

java中hidden属性怎样让隐藏的图片显示，之后再次隐藏

你在js中获取这个对象，隐藏就用.hidden（），显示就用.show（），把这个代码绑定在你想要的动作里面，比如onclick等事件

Java实现简单数据隐藏图片文件

我给你写的示例程序：隐藏数据调用hiddenWords,读取数据用readWords，移除数据用removeWords。不管是什么简单数据复杂数据，图片不管什么格式。主要都是转化为流来处理哈。代码如下：有不明白的可以hi 我

import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

/**

* @author Think

*

*/

public class HiddenWords

{

/**

*

*/

public HiddenWords()

{

// TODO Auto-generated constructor stub

}

/**

* @param args

*/

public static void main(String[] args)

{

// TODO Auto-generated method stub

try

{

int picbytes = hiddenWords("c:\\Sunset.bmp", "c:\\hidden.bmp", "hidden words");

String s = readWords("c:\\hidden.bmp", picbytes);

removeWords("c:\\hidden.bmp", picbytes, "c:\\old.bmp");

System.out.println("read words is:" + s);

}

catch (Exception e)

{

// TODO Auto-generated catch block

e.printStackTrace();

}

}

static int hiddenWords(String input, String output,String words)

{

try

{

InputStream is = new FileInputStream(new File(input/*"c:\\Sunset.bmp"*/));

int bytes = is.available();

DataOutputStream dos = new DataOutputStream(new FileOutputStream(new File(output/*"c:/s.bmp"*/)));

byte[] b = new byte[bytes];

int n = is.read(b, 0, bytes);

is.close();

dos.write(b, 0, n);

dos.writeUTF(words/*"ooeooeore"*/);

dos.close();

System.out.println("write end!!!");

return bytes;

}

catch (FileNotFoundException e)

{

// TODO Auto-generated catch block

e.printStackTrace();

}

catch (IOException e)

{

// TODO Auto-generated catch block

e.printStackTrace();

}

return 0;

}

static String readWords(String input/*DataInputStream dis*/, int skipbytes)

{

try

{

DataInputStream dis = new DataInputStream(new FileInputStream(new File(input)));

dis.skip(skipbytes);

String result = dis.readUTF();

dis.close();

return result;

}

catch (IOException e)

{

// TODO Auto-generated catch block

e.printStackTrace();

}

return "";

}

static void removeWords(String input/*DataInputStream dis*/, int skipbytes,String output)

{

try

{

DataInputStream dis = new DataInputStream(new FileInputStream(new File(input)));

byte[] bs = new byte[skipbytes];

int x = dis.read(bs, 0, skipbytes);

dis.close();

DataOutputStream dos = new DataOutputStream(new FileOutputStream(new File(output)));

dos.write(bs, 0, x);

dos.close();

}

catch (IOException e)

{

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

java如何实现图片中隐藏数据信息的功能啊，小弟死憋两天没有憋出来，请大神指导。

就是加个水印吧

package com.jc.ts.services;

import java.awt.Color;

import java.awt.Graphics;

import java.awt.Image;

import java.awt.image.BufferedImage;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import javax.imageio.ImageIO;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import com.sun.image.codec.jpeg.ImageFormatException;

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

import com.sun.image.codec.jpeg.JPEGImageEncoder;

/**

*添加图片水印的服务类

* */

public class WaterMark {

/**

* @param sizeContext添加水印文字

* @param request 请求流对象

* @param request 响应流对象

* */

@SuppressWarnings("deprecation")

public static void createMarkSize(String sizeContext,HttpServletRequest request,HttpServletResponse response) {

try {

String path=request.getRealPath(request.getServletPath());

FileInputStream in=new FileInputStream(path);

Image src=ImageIO.read(in);

int w=src.getWidth(null);

int h=src.getHeight(null);

BufferedImage img=new BufferedImage(w,h,BufferedImage.TYPE_INT_RGB);//构建画板

Graphics g=img.getGraphics();//得到画笔

g.drawImage(src,0,0,w,h,null);//把源图片写入画板

g.setColor(Color.red);

g.drawString(sizeContext,10,5); // 添加文字

g.dispose();//生成图片

JPEGImageEncoder e=JPEGCodec.createJPEGEncoder(response.getOutputStream());

e.encode(img);

response.getOutputStream().close();

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (ImageFormatException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

/**

* @param localPath 添加水印LOGO路径

* @param request 请求流对象

* @param request 响应流对象

**/

@SuppressWarnings("deprecation")

public static void createMarkLogo(String localPath,HttpServletRequest request,HttpServletResponse response) {

try {

FileInputStream file=new FileInputStream(localPath);

Image fimg=ImageIO.read(file);

int fw=fimg.getWidth(null);

int fh=fimg.getHeight(null);

String path=request.getRealPath(request.getServletPath());

FileInputStream in=new FileInputStream(path);

Image src=ImageIO.read(in);

int w=src.getWidth(null);

int h=src.getHeight(null);

BufferedImage img=new BufferedImage(w,h,BufferedImage.TYPE_INT_RGB);//构建画板

Graphics g=img.getGraphics();//得到画笔

g.drawImage(src,0,0,w,h,null);//把原图片写入画板

g.drawImage(fimg,w-20,h-15,fw,fh,null);//把水印图片写入画板

g.dispose();//生成图片

JPEGImageEncoder e=JPEGCodec.createJPEGEncoder(response.getOutputStream());

e.encode(img);

response.getOutputStream().close();

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (ImageFormatException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

/**

* @param localPath 添加水印图片路径

* @param request 请求流对象

* @param request 响应流对象

* @param width 水印图片的宽度

* @param height 水印图片的长度

**/

@SuppressWarnings("deprecation")

public static void createMarkLogo(String localPath,HttpServletRequest request,HttpServletResponse response,int width,int height) {

try {

FileInputStream file=new FileInputStream(localPath);

Image fimg=ImageIO.read(file);

int fw=fimg.getWidth(null);

int fh=fimg.getHeight(null);

String path=request.getRealPath(request.getServletPath());

FileInputStream in=new FileInputStream(path);

Image src=ImageIO.read(in);

int w=src.getWidth(null);//w为你过滤图片的宽度

int h=src.getHeight(null);//h为你过滤图片的长度

BufferedImage img=new BufferedImage(w+width,h+height,BufferedImage.TYPE_INT_RGB);//构建画板(画板的宽度为两个图片之和)

Graphics g=img.getGraphics();//得到画笔

g.drawImage(src,0,0,w,h,null);//把原图片写入画板

g.drawImage(fimg,width,height,fw,fh,null);//把水印图片写入画板

g.dispose();//生成图片

JPEGImageEncoder e=JPEGCodec.createJPEGEncoder(response.getOutputStream());

e.encode(img);

response.getOutputStream().close();

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (ImageFormatException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

注意第三个方法的注释地方g.drawImage(fimg,width,height,fw,fh,null);根据参数你在调调(放原图下面的)

过滤器调用

package com.jc.ts.filter;

import java.io.IOException;

import javax.servlet.Filter;

import javax.servlet.FilterChain;

import javax.servlet.FilterConfig;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import com.jc.ts.services.WaterMark;

public class WaterFilter implements Filter {

public void destroy() {

// TODO Auto-generated method stub

}

public void doFilter(ServletRequest arg0, ServletResponse arg1,

FilterChain arg2) throws IOException, ServletException {

HttpServletRequest request=(HttpServletRequest)arg0;

HttpServletResponse response=(HttpServletResponse)arg1;

//WaterMark.createMarkSize("南京ts", request, response);

//WaterMark.createMarkLogo("D:\\workspace\\mybook\\WebRoot\\images\\logo\\book.jpg", request, response);

WaterMark.createMarkLogo("D:\\workspace\\mybook\\WebRoot\\images\\logo\\book.jpg", request, response,20,30);

//注意路径为绝对路径且三个效果不能同时执行

}

public void init(FilterConfig arg0) throws ServletException {

// TODO Auto-generated method stub

}

}

web.xml配置(写在servlet上面)

filter

descriptionThis is the description of my J2EE component/description

display-nameThis is the display name of my J2EE component/display-name

filter-nameWaterFilter/filter-name

filter-classcom.jc.ts.filter.WaterFilter/filter-class

/filter