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java動圖代碼 java如何導入動態(tài)圖片

java 如何生成動態(tài)的gif圖片

實現(xiàn)思路：無論是何種類型，都是轉(zhuǎn)換為流的形式進行的文件傳輸和存儲。

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可以通過BufferedReader 流的形式進行流緩存，之后通過readLine方法獲取到緩存的內(nèi)容。

BufferedReader bre = null;

OutputStreamWriter pw = null;//定義一個流

try {

String file = "D:/test/test.GIF";

bre = new BufferedReader(new FileReader(file));//此時獲取到的bre就是整個文件的緩存流

pw = new OutputStreamWriter(new FileOutputStream(“D:/New.GIF”),"GBK");//確認流的輸出文件和編碼格式，此過程創(chuàng)建了“test.GIF”實例

while ((str = bre.readLine())!= null) // 判斷最后一行不存在，為空結(jié)束循環(huán)

{

pw.write(str);//將要寫入文件的內(nèi)容，可以多次write

}；

bre.close()；

pw.close();//關(guān)閉流

備注：文件流用完之后必須及時通過close方法關(guān)閉，否則會一直處于打開狀態(tài)，直至程序停止，增加系統(tǒng)負擔。

哪位大俠可以幫我寫一段java代碼！是關(guān)于根據(jù)數(shù)據(jù)庫里的數(shù)據(jù)來形成一個動態(tài)樹形圖

這是代碼，你可以自己調(diào)試一下。

數(shù)據(jù)結(jié)構(gòu)如下：

CREATE TABLE dtree (

id int,

pid int,

name varchar(200),

url varchar(200),

title varchar(200),

target varchar(200),

icon varchar(200),

iconopen varchar(200),

opened bit);

為了實現(xiàn)獲取數(shù)據(jù)庫變量功能，需要建立一個DTree類，并編譯生成CLASS文件，放入\WEB-INF\classes文件夾下。

DTree類代碼如下：

package work3;

public class DTree {

private int id;

private int pid;

private String name;

private String url;

private String title;

private String target;

private String icon;

private String iconOpen;

private int opened;

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public int getPid() {

return pid;

}

public void setPid(int pid) {

this.pid = pid;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public String getUrl() {

return url;

}

public void setUrl(String url) {

this.url = url;

}

public String getTitle() {

return title;

}

public void setTitle(String title) {

this.title = title;

}

public String getTarget() {

return target;

}

public void setTarget(String target) {

this.target = target;

}

public String getIcon() {

return icon;

}

public void setIcon(String icon) {

this.icon = icon;

}

public String getIconOpen() {

return iconOpen;

}

public void setIconOpen(String iconOpen) {

this.iconOpen = iconOpen;

}

public int getOpened() {

return opened;

}

public void setOpened(int opened) {

this.opened = opened;

}

}

work3.jsp代碼如下：

%@ page language="java" contentType="text/html; charset=GB18030" pageEncoding="GB18030"%

%@ page import="java.sql.*"%

jsp:useBean id='settree' scope="application" class="work3.DTree" /

!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"

""

html

head

meta http-equiv="Content-Type" content="text/html; charset=GB18030"

link rel="StyleSheet" href="dtree.css" type="text/css" /

script type="text/javascript" src="dtree.js"/script

titledTree in MySQL/title

/head

body

h2

Example

/h2

div class="dtree"

p

a href="javascript: d.openAll();"open all/a |

a href="javascript: d.closeAll();"close all/a

/p

script type="text/javascript"

!--

d = new dTree('d');

%

//驅(qū)動程序名

String driverName = "com.microsoft.jdbc.sqlserver.SQLServerDriver";

//數(shù)據(jù)庫用戶名

String userName = "sa";

//密碼

String userPwd = "1";

//數(shù)據(jù)庫名

String dbName = "master";

//表名

String tableName = "dtree";

//連接字符串

String url="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName="+dbName;

//加載驅(qū)動

Class.forName(driverName).newInstance();

//連接數(shù)據(jù)庫

java.sql.Connection conn = DriverManager.getConnection(url,userName,userPwd);

//得到Statement實例

java.sql.Statement statement = conn.createStatement();

//查詢數(shù)據(jù)

String sql = "select * from " + tableName;

//返回結(jié)果

java.sql.ResultSet rs = statement.executeQuery(sql);

//獲取變量

while (rs.next()) {

settree.setId(rs.getInt(1));

settree.setPid(rs.getInt(2));

settree.setName(rs.getString(3));

settree.setUrl(rs.getString(4));

settree.setTitle(rs.getString(5));

settree.setTarget(rs.getString(6));

settree.setIcon(rs.getString(7));

settree.setIconOpen(rs.getString(8));

settree.setOpened(rs.getInt(9));

if(settree.getPid()==0)

settree.setOpened(1);

%

d.add(%=settree.getId()%,%=settree.getPid()%,'%=settree.getName()%','%=settree.getUrl()%','%=settree.getTitle()%','%=settree.getTarget()%','','',%=settree.getOpened()%);

%

}

%

document.write(d);

//--

/script

/div

/body

/html

求java做動畫代碼

import?java.awt.Canvas;

import?java.awt.Color;

import?java.awt.Dimension;

import?java.awt.EventQueue;

import?java.awt.Frame;

import?java.awt.Graphics;

import?java.awt.Graphics2D;

import?java.awt.Image;

import?java.awt.RenderingHints;

import?java.awt.event.KeyEvent;

import?java.awt.event.KeyListener;

import?java.awt.event.WindowAdapter;

import?java.awt.event.WindowEvent;

import?java.awt.image.BufferedImage;

import?java.io.File;

import?java.io.IOException;

import?javax.imageio.ImageIO;

public?class?TestImage?extends?Frame

{

private?static?final?long?serialVersionUID?=?1L;

private?static?boolean?PRESSED?=?false;

private?static?int?pointX?=?0;

private?static?int?pointy?=?200;

private?static?int?RIGHT_GO?=?0;

private?static?int?LEFT_GO?=?0;

private?static?int?DIR?=?0;

private?static?int?ANGLE?=?0;

private?static?int?W?=?50;

private?static?int?H?=?60;

private?_Canvas?canvas?=?null;

public?TestImage?()

{

add?(canvas?=?new?_Canvas?());

setIgnoreRepaint?(true);

requestFocus?();

}

public?class?_Canvas?extends?Canvas?implements?Runnable

{

private?static?final?long?serialVersionUID?=?1L;

private?BufferedImage?bi?=?null;

private?Image?bufferedImage?=?null;

private?Thread?thread?=?null;

private?long?sleepTime?=?10;

public?_Canvas?()

{

try

{

bi?=?ImageIO.read?(new?File?("go.png"));

}

catch?(IOException?e)

{}

setBackground?(Color.BLACK);

requestFocus?();

addKeyListener?(new?KeyListener?()

{

@Override

public?void?keyTyped?(?KeyEvent?e?)

{}

@Override

public?void?keyReleased?(?KeyEvent?e?)

{

RIGHT_GO?=?0;

PRESSED?=?false;

}

@Override

public?void?keyPressed?(?KeyEvent?e?)

{

//?38?40?37?39上下左右

DIR?=?e.getKeyCode?();

PRESSED?=?true;

}

});

}

@Override

public?void?paint?(?Graphics?g?)

{

Graphics2D?g2d?=?(Graphics2D)?g;

g2d.setRenderingHint?(RenderingHints.KEY_INTERPOLATION,?RenderingHints.VALUE_INTERPOLATION_BILINEAR);

g2d.drawImage?(rotateImage?(bi.getSubimage?(RIGHT_GO,?LEFT_GO,?W,?H),?ANGLE,?true),?pointX,?pointy,?W,?H,

this);

g2d.dispose?();

}

@Override

public?void?update?(?Graphics?g?)

{

if?(null?==?bufferedImage)

{

bufferedImage?=?createImage?(getWidth?(),?getHeight?());

}

Graphics?bufferedG?=?bufferedImage.getGraphics?();

bufferedG.clearRect?(0,?0,?getWidth?(),?getHeight?());

paint?(bufferedG);

bufferedG.dispose?();

g.drawImage?(bufferedImage,?0,?0,?this);

g.dispose?();

}

public?void?start?()

{

thread?=?new?Thread?(this);

thread.setName?("TestImage");

thread.setPriority?(Thread.MIN_PRIORITY);

thread.start?();

}

public?synchronized?void?stop?()

{

thread?=?null;

notify?();

}

@Override

public?void?run?()

{

Thread?me?=?Thread.currentThread?();

while?(thread?==?me??!isShowing?()?||?getSize?().width?==?0)

{

try

{

Thread.sleep?(555);

}

catch?(InterruptedException?e)

{

return;

}

}

while?(thread?==?me??isShowing?())

{

if?(PRESSED)

{

try

{

if?(DIR?==?39)

{

RIGHT_GO?=?RIGHT_GO?+?50;

LEFT_GO?=?0;

pointX?=?pointX?+?1;

if?(pointX??420)

{

ANGLE?=?90;

pointX--;

pointy--;

W?=?60;

H?=?50;

}

if?(RIGHT_GO??50)

{

RIGHT_GO?=?0;

}

}

else?if?(DIR?==?37)

{

pointX?=?pointX?-?1;

RIGHT_GO?=?RIGHT_GO?+?50;

LEFT_GO?=?60;

if?(pointX??0)

{

ANGLE?=?-90;

pointX++;

pointy--;

W?=?60;

H?=?50;

}

if?(RIGHT_GO??50)

{

RIGHT_GO?=?0;

}

}

else?if?(DIR?==?38)

{

W?=?50;

H?=?60;

pointy?=?150;

ANGLE?=?0;

RIGHT_GO?=?100;

}

else?if?(DIR?==?40)

{

W?=?50;

H?=?60;

ANGLE?=?0;

pointy?=?200;

RIGHT_GO?=?0;

}

Thread.sleep?(sleepTime);

repaint?();

}

catch?(InterruptedException?e)

{

break;

}

}

else

{

RIGHT_GO?=?RIGHT_GO?+?50;

LEFT_GO?=?0;

pointX?=?pointX?+?1;

if?(RIGHT_GO??50)

{

RIGHT_GO?=?0;

}

if?(pointX??500)

{

pointX?=?0;

}

try

{

Thread.sleep?(sleepTime);

repaint?();

}

catch?(InterruptedException?e)

{

break;

}

}

}

thread?=?null;

}

}

/**

?*?旋轉(zhuǎn)圖像為指定角度

?*?

?*?@param?degree

?*?@return

?*/

public?static?BufferedImage?rotateImage?(?final?BufferedImage?image,?final?int?angdeg,?final?boolean?d?)

{

int?w?=?image.getWidth?();

int?h?=?image.getHeight?();

int?type?=?image.getColorModel?().getTransparency?();

BufferedImage?img;

Graphics2D?graphics2d;

(?graphics2d?=?(?img?=?new?BufferedImage?(w,?h,?type)?).createGraphics?()?).setRenderingHint?(

RenderingHints.KEY_INTERPOLATION,?RenderingHints.VALUE_INTERPOLATION_BILINEAR);

graphics2d.rotate?(d???-Math.toRadians?(angdeg)?:?Math.toRadians?(angdeg),?w?/?2,?h?/?2);

graphics2d.drawImage?(image,?0,?0,?null);

graphics2d.dispose?();

return?img;

}

public?static?void?main?(?String[]?args?)

{

EventQueue.invokeLater?(new?Runnable?()

{

@Override

public?void?run?()

{

final?TestImage?ti?=?new?TestImage?();

ti.setSize?(new?Dimension?(500,?300));

ti.setLocationRelativeTo?(null);

ti.addWindowListener?(new?WindowAdapter?()

{

@Override

public?void?windowClosing?(?WindowEvent?e?)

{

System.exit?(0);

}

@Override

public?void?windowDeiconified?(?WindowEvent?e?)

{

ti.canvas.start?();

}

@Override

public?void?windowIconified?(?WindowEvent?e?)

{

ti.canvas.stop?();

}

});

ti.setResizable?(false);

ti.canvas.start?();

ti.setVisible?(true);

}

});

}

}


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