我是网上看来的,但程序又点错误package dreamtime.guestbook; //指定类所在的包
import java.awt.*; //导入类
import java.awt.image.*;
import java.util.*;
//定义类public class VerifyCode {
static Random r = new Random();
static String ssource = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+ "abcdefghijklmnopqrstuvwxyz" + "0123456789";
static char[] src = ssource.toCharArray();
//产生随机字符串
private static String randString (int length){
char[] buf = new char[length];
int rnd;
for(int i=0;i<length;i++){
rnd = Math.abs(r.nextInt()) % src.length;
buf[i] = src[rnd];
}
return new String(buf);
}
//调用该方法,产生随机字符串
public String runVerifyCode(int i){
String VerifyCode = randString(i);
return VerifyCode;
}
//给定范围获得随机颜色
public Color getRandColor(int fc,int bc)
{
Random random = new Random();
if(fc>255) fc=255;
if(bc>255) bc=255;
int r=fc+random.nextInt(bc-fc);
int g=fc+random.nextInt(bc-fc);
int b=fc+random.nextInt(bc-fc);
return new Color(r,g,b);
}
//调用该方法将得到的验证码生成图象
//sCode:传递验证码 w:图象宽度 h:图象高度
public BufferedImage CreateImage(String sCode)
{
//字符的字体
Font CodeFont = new Font("Arial Black",Font.PLAIN,16);
int iLength = sCode.length();//得到验证码长度
int width=24*iLength, height=20;//图象宽度与高度
int CharWidth = (int)(width-24)/iLength; //字符距左边宽度
int CharHeight = 16; //字符距上边高度
// 在内存中创建图象
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
// 获取图形上下文
Graphics g = image.getGraphics();
//生成随机类
Random random = new Random();
// 设定背景色
g.setColor(getRandColor(200,240));
g.fillRect(0, 0, width, height);
//设定字体
g.setFont(CodeFont);
//画随机颜色的边框
g.setColor(getRandColor(10,50));
g.drawRect(0,0,width-1,height-1);
// 随机产生155条干扰线,使图象中的认证码不易被其它程序探测到
g.setColor(getRandColor(160,200));
for (int i=0;i<155;i++)
{
int x = random.nextInt(width);
int y = random.nextInt(height);
int xl = random.nextInt(12);
int yl = random.nextInt(12);
g.drawLine(x,y,x+xl,y+yl);
}
for (int i=0;i<iLength;i++)
{
String rand = sCode.substring(i,i+1);
// 将认证码显示到图象中
g.setColor(new Color(20+random.nextInt(60),20+random.nextInt(120),20+random.nextInt(180)));
g.drawString(rand,CharWidth*i+14,CharHeight);
}
// 图象生效
System.out.print(CharWidth);
g.dispose();
return image;
}
//测试
public static void main(String[] args){
VerifyCode vc = new VerifyCode();
String s1 = vc.runVerifyCode(4);
System.out.println(s1);
Image im = vc.CreateImage(s1);
Graphics g = im.getGraphics();
g.drawImage(im,20,20,this);
g.drawString(s1,20,20);
}
}就是在倒数弟2行,//g.drawImage(im,20,20,this);说这个this不能用在静态的应该怎么改呢,谢谢
import java.awt.*; //导入类
import java.awt.image.*;
import java.util.*;
//定义类public class VerifyCode {
static Random r = new Random();
static String ssource = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+ "abcdefghijklmnopqrstuvwxyz" + "0123456789";
static char[] src = ssource.toCharArray();
//产生随机字符串
private static String randString (int length){
char[] buf = new char[length];
int rnd;
for(int i=0;i<length;i++){
rnd = Math.abs(r.nextInt()) % src.length;
buf[i] = src[rnd];
}
return new String(buf);
}
//调用该方法,产生随机字符串
public String runVerifyCode(int i){
String VerifyCode = randString(i);
return VerifyCode;
}
//给定范围获得随机颜色
public Color getRandColor(int fc,int bc)
{
Random random = new Random();
if(fc>255) fc=255;
if(bc>255) bc=255;
int r=fc+random.nextInt(bc-fc);
int g=fc+random.nextInt(bc-fc);
int b=fc+random.nextInt(bc-fc);
return new Color(r,g,b);
}
//调用该方法将得到的验证码生成图象
//sCode:传递验证码 w:图象宽度 h:图象高度
public BufferedImage CreateImage(String sCode)
{
//字符的字体
Font CodeFont = new Font("Arial Black",Font.PLAIN,16);
int iLength = sCode.length();//得到验证码长度
int width=24*iLength, height=20;//图象宽度与高度
int CharWidth = (int)(width-24)/iLength; //字符距左边宽度
int CharHeight = 16; //字符距上边高度
// 在内存中创建图象
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
// 获取图形上下文
Graphics g = image.getGraphics();
//生成随机类
Random random = new Random();
// 设定背景色
g.setColor(getRandColor(200,240));
g.fillRect(0, 0, width, height);
//设定字体
g.setFont(CodeFont);
//画随机颜色的边框
g.setColor(getRandColor(10,50));
g.drawRect(0,0,width-1,height-1);
// 随机产生155条干扰线,使图象中的认证码不易被其它程序探测到
g.setColor(getRandColor(160,200));
for (int i=0;i<155;i++)
{
int x = random.nextInt(width);
int y = random.nextInt(height);
int xl = random.nextInt(12);
int yl = random.nextInt(12);
g.drawLine(x,y,x+xl,y+yl);
}
for (int i=0;i<iLength;i++)
{
String rand = sCode.substring(i,i+1);
// 将认证码显示到图象中
g.setColor(new Color(20+random.nextInt(60),20+random.nextInt(120),20+random.nextInt(180)));
g.drawString(rand,CharWidth*i+14,CharHeight);
}
// 图象生效
System.out.print(CharWidth);
g.dispose();
return image;
}
//测试
public static void main(String[] args){
VerifyCode vc = new VerifyCode();
String s1 = vc.runVerifyCode(4);
System.out.println(s1);
Image im = vc.CreateImage(s1);
Graphics g = im.getGraphics();
g.drawImage(im,20,20,this);
g.drawString(s1,20,20);
}
}就是在倒数弟2行,//g.drawImage(im,20,20,this);说这个this不能用在静态的应该怎么改呢,谢谢
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Random;import com.sun.image.codec.jpeg.ImageFormatException;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;//定义类public class VerifyCode
{
static Random r = new Random();
static String ssource = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+ "abcdefghijklmnopqrstuvwxyz" + "0123456789";
static char[] src = ssource.toCharArray(); // 产生随机字符串
private static String randString(int length)
{
char[] buf = new char[length];
int rnd;
for (int i = 0; i < length; i++)
{
rnd = Math.abs(r.nextInt()) % src.length;
buf[i] = src[rnd];
}
return new String(buf);
} // 调用该方法,产生随机字符串
public String runVerifyCode(int i)
{
String VerifyCode = randString(i);
return VerifyCode;
} // 给定范围获得随机颜色
public Color getRandColor(int fc, int bc)
{
Random random = new Random();
if (fc > 255)
fc = 255;
if (bc > 255)
bc = 255;
int r = fc + random.nextInt(bc - fc);
int g = fc + random.nextInt(bc - fc);
int b = fc + random.nextInt(bc - fc);
return new Color(r, g, b);
} // 调用该方法将得到的验证码生成图象
// sCode:传递验证码 w:图象宽度 h:图象高度
public BufferedImage CreateImage(String sCode)
{
// 字符的字体
Font CodeFont = new Font("Arial Black", Font.PLAIN, 16);
int iLength = sCode.length();// 得到验证码长度
int width = 24 * iLength, height = 20;// 图象宽度与高度
int CharWidth = (int) (width - 24) / iLength; // 字符距左边宽度
int CharHeight = 16; // 字符距上边高度 // 在内存中创建图象
BufferedImage image = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB); // 获取图形上下文
Graphics g = image.getGraphics(); // 生成随机类
Random random = new Random(); // 设定背景色
g.setColor(getRandColor(200, 240));
g.fillRect(0, 0, width, height); // 设定字体
g.setFont(CodeFont); // 画随机颜色的边框
g.setColor(getRandColor(10, 50));
g.drawRect(0, 0, width - 1, height - 1); // 随机产生155条干扰线,使图象中的认证码不易被其它程序探测到
g.setColor(getRandColor(160, 200));
for (int i = 0; i < 155; i++)
{
int x = random.nextInt(width);
int y = random.nextInt(height);
int xl = random.nextInt(12);
int yl = random.nextInt(12);
g.drawLine(x, y, x + xl, y + yl);
} for (int i = 0; i < iLength; i++)
{
String rand = sCode.substring(i, i + 1);
// 将认证码显示到图象中
g.setColor(new Color(20 + random.nextInt(60), 20 + random
.nextInt(120), 20 + random.nextInt(180)));
g.drawString(rand, CharWidth * i + 14, CharHeight);
}
// 图象生效
System.out.print(CharWidth);
g.dispose();
return image;
} // 测试
public static void main(String[] args) throws ImageFormatException,
IOException
{
VerifyCode vc = new VerifyCode();
String s1 = vc.runVerifyCode(4);
System.out.println(s1);
Image im = vc.CreateImage(s1);
Graphics g = im.getGraphics();
g.drawImage(im, 20, 20, null);
g.drawString(s1, 20, 20); // 将图片输出到文件
FileOutputStream outer = new FileOutputStream("C:\\1.jpg");
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(outer);
encoder.encode((BufferedImage) im);
}
}
JFrame frame = new JFrame();
frame.setVisible(true);
frame.setSize(300,200);
Test t = new Test();
String s1 = t.runVerifyCode(4);
JLabel label = new JLabel(new ImageIcon(t.CreateImage(s1)));
frame.add(label);
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
}
import java.awt.*; //导入类
import java.awt.image.*;
import java.util.*;
//定义类public class VerifyCode{
static Random r = new Random();
static String ssource = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" + "abcdefghijklmnopqrstuvwxyz" + "0123456789";
static char[] src = ssource.toCharArray();
//产生随机字符串
private static String randString (int length){
char[] buf = new char[length];
int rnd;
for(int i=0;i<length;i++){
rnd = Math.abs(r.nextInt()) % src.length;
buf[i] = src[rnd];
}
return new String(buf);
}
//调用该方法,产生随机字符串
public String runVerifyCode(int i){
String VerifyCode = randString(i);
return VerifyCode;
} //给定范围获得随机颜色
public Color getRandColor(int fc,int bc)
{
Random random = new Random();
if(fc>255) fc=255;
if(bc>255) bc=255;
int r=fc+random.nextInt(bc-fc);
int g=fc+random.nextInt(bc-fc);
int b=fc+random.nextInt(bc-fc);
return new Color(r,g,b);
} //调用该方法将得到的验证码生成图象
//sCode:传递验证码 w:图象宽度 h:图象高度
public BufferedImage CreateImage(String sCode)
{
//字符的字体
Font CodeFont = new Font("Arial Black",Font.PLAIN,16);
int iLength = sCode.length();//得到验证码长度
int width=24*iLength, height=20;//图象宽度与高度
int CharWidth = (int)(width-24)/iLength; //字符距左边宽度
int CharHeight = 16; //字符距上边高度
// 在内存中创建图象
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
// 获取图形上下文
Graphics g = image.getGraphics();
//生成随机类
Random random = new Random();
// 设定背景色
g.setColor(getRandColor(200,240));
g.fillRect(0, 0, width, height);
//设定字体
g.setFont(CodeFont);
//画随机颜色的边框
g.setColor(getRandColor(10,50));
g.drawRect(0,0,width-1,height-1);
// 随机产生155条干扰线,使图象中的认证码不易被其它程序探测到
g.setColor(getRandColor(160,200));
for (int i=0;i<155;i++)
{
int x = random.nextInt(width);
int y = random.nextInt(height);
int xl = random.nextInt(12);
int yl = random.nextInt(12);
g.drawLine(x,y,x+xl,y+yl);
}
for (int i=0;i<iLength;i++)
{
String rand = sCode.substring(i,i+1);
// 将认证码显示到图象中
g.setColor(new Color(20+random.nextInt(60),20+random.nextInt(120),20+random.nextInt(180)));
g.drawString(rand,CharWidth*i+14,CharHeight);
}
// 图象生效
System.out.print(CharWidth);
g.dispose();
return image;
} //测试
/**public static void main(String[] args){
VerifyCode vc = new VerifyCode();
String s1 = vc.runVerifyCode(4);
System.out.println(s1);
Image im = vc.CreateImage(s1);
Graphics g = im.getGraphics();
g.drawImage(im,20,20,this);
g.drawString(s1,20,20);
} */
public static void main(String[] args) {
JFrame frame1 = new JFrame();
frame1.setVisible(true);
frame1.setSize(300,200);
VerifyCode t = new VerifyCode();
String s1 = t.runVerifyCode(4);
JLabel label = new JLabel(new ImageIcon(t.CreateImage(s1)));
frame1.add(label);
frame1.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
}
}