〔picture.java〕

package creator.common.attachlogin;

import java.io.*;

public class picture{

final int key=1;

final string error_format_int= "format of color is not rgb.sample /"212|232|0/"";

final string error_color_input="format of color(num|num|num): num in 0-255";

/**格式化输出数据**/

public string manage(string temp){

string returnstr="";

temp = encrypt(temp);

byte[] by =temp.getbytes();

for(int i=0;i<by.length;i++){

returnstr=returnstr+(byte)by[i]+"|";

}

return returnstr;

}

/**格式化输入数据**/

public byte[] dismanage(string temp){

int len=0,index=0,i=0,first=0;

while(( i=temp.indexof("|",first))>-1){

len++;

first=i+1;

}

byte[] by=new byte[len];

first=0;

while(( i=temp.indexof("|",first))>-1){

by[index]=byte.parsebyte(temp.substring(first,i));

index++;

first=i+1;

}

return by;

}

/**随机生成四位的附加码**/

public string getrandom(){

int i1 = (int)(java.lang.math.random()*10);

int i2 = (int)(java.lang.math.random()*10);

int i3 = (int)(java.lang.math.random()*10);

int i4 = (int)(java.lang.math.random()*10);

return string.valueof(i1)+string.valueof(i2)+string.valueof(i3)+string.valueof(i4);

}

/**加密1：错位处理**/

public string encrypt(string randomstr){

string para=random()+randomstr.substring(0,1)+random()+random()+randomstr.substring(1,2);

para= para+random()+randomstr.substring(2);

return jiami(para);

}

/**得到随机数0-9之间**/

private string random(){

string temp = string.valueof((int)(java.lang.math.random()*10));

return temp;

}

/**加密2：加密处理，此方法可以自己修改**/

private string jiami(string str){

byte[] by = str.getbytes();

bytearrayinputstream in = new bytearrayinputstream(by);

int ch;

int index=0;

byte[] temp = new byte[in.available()];

while((ch=in.read())!=-1){

temp[index]=(byte)(ch-key);

index++;

}

bytearrayinputstream ins = new bytearrayinputstream(temp);

bufferedreader freader = new bufferedreader(new inputstreamreader(ins));


try{ return freader.readline();}catch(exception e){return "";}

}

/**从给的数字里得到正确的数字**/

public string discrypt(string temp){

string para = jiemi(dismanage(temp));

return para.substring(1,2)+para.substring(4,5)+ para.substring(6,8);

}

/**解密处理**/

private string jiemi(byte[] by){

bytearrayinputstream in = new bytearrayinputstream(by);

int ch;

int index=0;

byte[] temp = new byte[in.available()];

while((ch=in.read())!=-1){

temp[index]=(byte)(ch+key);

index++;

}

bytearrayinputstream ins = new bytearrayinputstream(temp);

bufferedreader freader = new bufferedreader(new inputstreamreader(ins));

try{ return freader.readline();}catch(exception e){return "";}

}

/**分解rgb格式的颜色 num|num|num**/

public int[] masterdata(string temp){

int index_len=0,index=0,next_index=0;

int[] return_arr=new int[3];

boolean break_error=false;

if(getmax(temp,"|")==2){

while((index_len=temp.indexof("|",next_index))>-1){

if(getint(temp.substring(next_index,index_len))==256){

break_error = true;

}else{

return_arr[index]=getint(temp.substring(next_index,index_len));

next_index=index_len+1;

index++;

}

if(break_error) break;

}

if(break_error){

return null;

}else{

return_arr[index] = getint(temp.substring(next_index));

return return_arr;

}

}else{

system.out.println(error_format_int+":"+temp);

return null;

}

}

private int getmax(string temp,string temp2){

int index=0,index_len=0,index_next=0;

while((index=temp.indexof(temp2,index_next))>-1){

index_len++;

index_next=index+1;

}

return index_len;

}

private int getint(string temp){

try{

return integer.parseint(temp);

}catch(exception e){

system.out.println(error_color_input+":"+temp);

return 256;

}

}

}

〔createimage.java〕

package creator.common.attachlogin;


import java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;

import java.awt.*;

import java.awt.image.*;

import java.awt.image.bufferedimage;

import com.sun.image.codec.jpeg.*;

import com.sun.image.codec.jpeg.jpegcodec;


public class createimage extends httpservlet {

static final private string content_type = "text/html; charset=gb2312";

final string input_back_color_error="input rgb backcolor is error";

final string input_fore_color_error="input rgb forecolor is error";

private picture pic = new picture();


//initialize global variables

public void init() throws servletexception {

}

//process the http get request

public void doget(httpservletrequest request, httpservletresponse response) throws servletexception, ioexception {
//生成图片
try{
int imagewidth = 60;
int imageheight = 20;

bufferedimage image = new bufferedimage(imagewidth, imageheight, bufferedimage.type_int_rgb);
graphics graphics = image.getgraphics();
graphics.setcolor(color.white);
graphics.fillrect(0,0,imagewidth,imageheight);
graphics.setcolor(color.white);


fileoutputstream fos = new fileoutputstream("attach.jpg");
bufferedoutputstream bos = new bufferedoutputstream(fos);
jpegimageencoder encoder = jpegcodec.createjpegencoder(bos);
encoder.encode(image);
bos.close();

}catch(exception e){
system.out.println("生成图片出错！");
}


string querynum = request.getparameter("image");

string queryrgb="";

if(request.getparameter("rgb")!=null){

queryrgb = request.getparameter("rgb");

}

response.setheader("cache-control","no-st