java实现读取flash的swf文件属性

**

flashattrib.java

*/

package picattrib;

import java.io.IOException;

import java.io.FileInputStream;

public class flashattrib {

public flashattrib() {

}

public static void main(String[] args) {

flashattrib flashattrib = new flashattrib();

byte[] bb=null;

image1 im = null;

try {

bb=flashattrib.readFromFile("d:\\aa.swf");

im = flashattrib.getAttrib(bb);

System.out.println(im.getWidth());

System.out.println(im.getHight());

bb=flashattrib.readFromFile("d:\\bb.swf");

im = flashattrib.getAttrib(bb);

System.out.println(im.getWidth());

System.out.println(im.getHight());

bb=flashattrib.readFromFile("d:\\bb.swf");

im = flashattrib.getAttrib(bb);

System.out.println(im.getWidth());

System.out.println(im.getHight());

} catch (IOException ex1) {

System.out.println(ex1);

}

System.out.println(im.getWidth());

System.out.println(im.getHight());

/*

byte aa=0;

for (int i=0;i<260;i++){

System.out.println(flashattrib.getInt(aa++));

}

*/

}

/**

* @param bb byte[]

* @param start int

* @param leng int

* @return int

*/

public int getWeizhi(int start,int weizhi,int leng,byte[] bb){

int aa=0;

if (weizhi==0) {

aa=getInt(bb[start]);

for (int i=1;i<leng;i++){

aa*=256;

int cc=getInt(bb[start+i]);

aa+=cc;

}

}else{

aa=getInt(bb[start])%16;

aa*=256;

aa+=getInt(bb[start+1]);

aa*=16;

aa+=getInt(bb[start+2])/16;

}

return aa;

}

public image1 getAttrib(byte[] bb){

image1 im=new image1();

//flash文件的宽高位置不固定，分为8种，根据第9位的值，来判断当前flash文件的具体宽高位置

//16进制50，58，60，68，70，78，80，88

switch(bb[8]){

case 80: im.setWidth(getWeizhi(9,0,2,bb)/10);

im.setHight(getWeizhi(11,1,2,bb)/10);

break;

case 88: im.setWidth(getWeizhi(9,1,2,bb)/40);

im.setHight(getWeizhi(12,0,2,bb)/10);

break;

case 96: im.setWidth(getWeizhi(9,1,2,bb)/10);

im.setHight(getWeizhi(12,1,2,bb)/10);

break;

case 104: im.setWidth(getWeizhi(10,0,2,bb)/40);

im.setHight(getWeizhi(13,0,2,bb)/10);

break;

case 112: im.setWidth(getWeizhi(10,0,2,bb)/10);

im.setHight(getWeizhi(13,1,2,bb)/10);

break;

case 120: im.setWidth(getWeizhi(10,1,2,bb)/40);

im.setHight(getWeizhi(14,0,2,bb)/10);

break;

case -128: im.setWidth(getWeizhi(10,1,2,bb)/10);

im.setHight(getWeizhi(14,1,2,bb)/10);

break;

case -120: im.setWidth(getWeizhi(10,0,3,bb)/40);

im.setHight(getWeizhi(15,0,2,bb)/10);

break;

}

return im;

}

public int getInt(byte bb){

if (bb>=0) return bb;

else return 256+bb;

}

private static byte[] readFromFile(String fileName) throws IOException

{

PicsModel model = null;

FileInputStream fin = new FileInputStream(fileName);

byte [] buf = new byte[fin.available()];

fin.read(buf);

fin.close();

return buf;

}

}

/*

image1.java

*/

package picattrib;

public class image1 {

private int width;

private int hight;

private int leng;

public image1() {

try {

jbInit();

} catch (Exception ex) {

ex.printStackTrace();

}

}

public static void main(String[] args) {

image1 image1 = new image1();

}

private void jbInit() throws Exception {

}

public void setWidth(int width) {

this.width = width;

}

public void setHight(int hight) {

this.hight = hight;

}

public void setLeng(int leng) {

this.leng = leng;

}

public int getWidth() {

return width;

}

public int getHight() {

return hight;

}

public int getLeng() {

return leng;

}

}

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