createimage.java

一个信息发布系统 基于jsp+servlet+tomcat 用户分管理员跟普通用户 普通用户有发布信息 查询信息 修改信息 回复信息 管理员拥有普通用户的功能 此外还具有删除信息 管理信息的回复的功能

package control;
import java.io.IOException;
import javax.servlet.http.*;
import javax.servlet.*;
import javax.imageio.*;
import java.io.*;
import java.awt.image.*;
import java.awt.*;
import model.*;
import java.util.*;

public class CreateImage 
{
	
    
    public String getImage(int Width ,int Height,OutputStream os )
    {  	
    	if(Width <= 0)
    		Width = 60;
    	if(Height <= 0)
    		Height = 22;
    	
    	BufferedImage image = new BufferedImage(Width,Height,BufferedImage.TYPE_INT_RGB);
    	Graphics g = image.getGraphics();
    	g.setColor(Color.white);
    	g.fillRect(0,0,Width,Height);

    	g.setColor(Color.black);
    	g.drawRect(0,0,Width-1,Height-1);

    	//String rand = "fdsf";
        String rand = String.valueOf((int)(Math.random()*10000));
        //System.out.println(rand);
    	switch(rand.length())
    	{
    	   case 1: rand = "000"+rand;
    	       break;
    	   case 2: rand = "00"+rand;
    	       break;
    	   case 3: rand = "0"+rand;
    	       break;
    	       
    	 }
    	  //System.out.println(rand);
    	  g.setColor(Color.black);   
    	  g.setFont(new   Font("Times   New   Roman",Font.PLAIN,18));   
    	  g.drawString(rand,10,15); 
    	  
    	   Random   random=new   Random();   
    	  for(int   iIndex=0;iIndex<88;iIndex++)   
    	  {   
    	  int   x=random.nextInt(Width);   
    	  int   y=random.nextInt(Height);   
    	  g.drawLine(x,y,x,y);   
    	  }  
    	  g.dispose();
    	  try
    	  {
    	     ImageIO.write(image,"JPEG",os);
    	  }
    	  catch(IOException e){return "";}
    	  return rand;
    }
    
}