工厂模式设计实现读取文本文件和图像的三基色信息

来源：互联网发布：java后台和php后台编辑：程序博客网时间：2024/06/11 18:43

要求：

编写读文件功能，具体为读取文本文件（包括GBK,UTF8,UNICODE 编码下的文本文件，要求获得全文内容）；读取图像文件（BMO,GIF,JPG ),要求获得图像的宽度、长度、每一点的RGB三基色信息。

请使用观察者模式设计该系统。

代码：

import java.awt.image.BufferedImage;import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import javax.imageio.ImageIO;import javax.swing.ImageIcon;interface Type{public void read();public void read(String filePath);}class TextType implements Type{public void read(String filePath){try{String encoding="GBK";File file = new File(filePath);if(file.isFile()&&file.exists()){InputStreamReader du = new InputStreamReader(new FileInputStream(file),encoding);BufferedReader bufferedReader = new BufferedReader(du);String lineTxt = null;while((lineTxt = bufferedReader.readLine())!=null){System.out.println(lineTxt);}du.close();}else{System.out.println("找不到指定文件！");}}catch(Exception e){System.out.println("读取文件内容出错！");e.printStackTrace();}}@Overridepublic void read() {// TODO Auto-generated method stub}}class ImageType implements Type{public void read(){}@Overridepublic void read(String filePath) {   ImageIcon image=new ImageIcon(filePath);   InputStream in;   BufferedImage img = null;try {in = new FileInputStream(filePath);img=ImageIO.read(in);} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();}catch(IOException e){e.printStackTrace();}   int wid=img.getWidth();   int hid=img.getHeight();   int rgb[][]=new int[wid][hid];          for(int i=0;i<wid;i++){               for(int j=0;j<hid;j++){                    rgb[i][j]=img.getRGB(i, j) & 0xFFFFFF;                    System.out.print(rgb[i][j]+" ");               }               System.out.println();          }    //System.out.println(wid+" "+hid);   } }class TypeFactory{public Type getType(String type){if(type==null){return null;}if(type.equals("TextType")){return new TextType();}else if(type.equals("ImageType")){return new ImageType();}return null;}}public class FactoryDemo {public static void main(String []args){TypeFactory typefactory = new TypeFactory();Type type1 = typefactory.getType("TextType");String filePath1 ="C:\\Users\\ZZT\\Desktop\\1.txt";type1.read(filePath1);System.out.println();Type type2 = typefactory.getType("ImageType");String filePath2 ="C:\\Users\\ZZT\\Desktop\\2.jpg";type2.read(filePath2);}}

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