save.java

java语言实现的一个画图小程序,可以实现绘图

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package drawfigure;
import java.io.IOException; 
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.*;
import java.awt.event.*;    
import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintWriter;

public class Save extends JFrame
{
    JLabel  fname;
    JLabel  path;
    JTextField jTextFieldfname;
    JTextField jTextFieldpath;
    JButton save;
    JButton exit;
     Save(final DrawFigure draw)
     {  
        this.setLayout(null);//设置布局管理器为null                   
        File file=new File("画图文件");
        if(!file.exists()) file.mkdir();
    	//初始化各个控件
    	fname=new JLabel("文件名");
    	path=new JLabel("保存路径");
    	jTextFieldfname=new JTextField("未命名.txt");          
        jTextFieldpath=new JTextField(file.getAbsolutePath());
    	save= new JButton("保存");
    	exit=new JButton("取消");
        
    	//设置控件位置
    	this.fname.setBounds(10,10,80,20);
        this.path.setBounds(10,50,80,20);
        this.jTextFieldfname.setBounds(100,10,200,20);
    	this.jTextFieldpath.setBounds(100,50,200,20);
        this.save.setBounds(30, 100, 100, 30);
        this.exit.setBounds(200, 100, 100, 30);

    	//将控件添加到面板上
        this.add(fname);
        this.add(path);
        this.add(jTextFieldfname);
        this.add(jTextFieldpath);
        this.add(save);
        this.add(exit);
    	this.setBounds(330,300,350,200);
    	this.setTitle("保存");
    	this.setVisible(true);
     save.addActionListener(new ActionListener()
     {public void actionPerformed(ActionEvent e)
      {   
         String p,f;int ju=0;
         p=jTextFieldpath.getText();
         f=jTextFieldfname.getText();
         File pa=new File(p);
         if(!pa.isDirectory()){
            JOptionPane.showMessageDialog(null ,"路径非法","错误",JOptionPane.INFORMATION_MESSAGE);}
        else
          {    try {
                        if (!pa.exists()) {
                            pa.mkdir();
                        }
                        File f1 = new File(pa, f);
                        if(f1.exists())
                        { ju=JOptionPane.showConfirmDialog(null,"该文件已存在，是否覆盖？", "警告",JOptionPane.INFORMATION_MESSAGE); //0-是，1-否，2-取消。
                         }
                      if(ju==0){
                        draw.saved=true;
                        f1.createNewFile();
                       PrintWriter output = new PrintWriter(new FileOutputStream(f1));
                   for (int i = 0; i < draw.stack.size(); i++) {
                        output.write(String.valueOf(draw.stack.get(i).i)+'\t');
                        output.write(String.valueOf(draw.stack.get(i).sx)+'\t');
                        output.write(String.valueOf(draw.stack.get(i).sy)+'\t');
                        output.write(String.valueOf(draw.stack.get(i).x)+'\t');
                        output.write(String.valueOf(draw.stack.get(i).y)+'\t');
                        output.write(String.valueOf(draw.stack.get(i).c.getBlue())+'\t');
                        output.write(String.valueOf(draw.stack.get(i).c.getGreen())+'\t');
                        output.write(String.valueOf(draw.stack.get(i).c.getRed())+'\t');
                        output.write(String.valueOf(draw.stack.get(i).fill)+'\t'+'\r'+'\n');
                        }
                    output.close();setVisible(false);
                      }
                     if(ju==2)
                       { draw.saved=false;
                         setVisible(false); draw.repaint();       
                     }
                    } catch (IOException ex) {
                        Logger.getLogger(Save.class.getName()).log(Level.SEVERE, null, ex);
                    }
           }
         draw.repaint();
      }
    }); 
     exit.addActionListener(new ActionListener()
     {public void actionPerformed(ActionEvent e)
      {         draw.saved=false;
                         setVisible(false); draw.repaint();                           
      }
    }); 
      }
}