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Code Issues Releases Wiki Activity

优化验证码的效果和干扰

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synchronized 2018-07-27 15:11:34 +08:00
parent a548f7af0b
commit 67409112a7
8 changed files with 204 additions and 128 deletions
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158
pom.xml
View File

@ -20,12 +20,6 @@
</license>
</licenses>
<parent>
<groupId>org.sonatype.oss</groupId>
<artifactId>oss-parent</artifactId>
<version>7</version>
</parent>
<dependencies>
<!-- j2ee环境 -->
<dependency>
@ -50,88 +44,86 @@
<configuration>
<source>6</source>
<target>6</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
</plugins>
</build>
<!--
<scm>
<url>https://github.com/whvcse/EasyCaptcha</url>
<connection>https://github.com/whvcse/EasyCaptcha.git</connection>
<developerConnection>https://github.com/whvcse/EasyCaptcha</developerConnection>
</scm>
<scm>
<url>https://github.com/whvcse/EasyCaptcha</url>
<connection>scm:git:git@github.com:whvcse/EasyCaptcha</connection>
<developerConnection>scm:git:git@github.com:whvcse/EasyCaptcha</developerConnection>
<tag>HEAD</tag>
</scm>
<developers>
<developer>
<name>whvcse</name>
<email>whvcse@foxmail.com</email>
<url>https://github.com/whvcse</url>
</developer>
</developers>
<developers>
<developer>
<name>whvcse</name>
<email>whvcse@foxmail.com</email>
<url>https://github.com/whvcse</url>
</developer>
</developers>
<distributionManagement>
<snapshotRepository>
<id>ossrh</id>
<url>https://oss.sonatype.org/content/repositories/snapshots/</url>
</snapshotRepository>
<repository>
<id>ossrh</id>
<url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
</repository>
</distributionManagement>
<distributionManagement>
<snapshotRepository>
<id>oss</id>
<name>OSS Snapshots Repository</name>
<url>https://oss.sonatype.org/content/repositories/snapshots/</url>
</snapshotRepository>
<repository>
<id>oss</id>
<name>OSS Staging Repository</name>
<url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
</repository>
</distributionManagement>
<profiles>
<profile>
<id>release</id>
<build>
<plugins>
<!-- Source -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-source-plugin</artifactId>
<version>2.2.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>jar-no-fork</goal>
</goals>
</execution>
</executions>
</plugin>
<!-- Javadoc -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-javadoc-plugin</artifactId>
<version>2.9.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>jar</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-gpg-plugin</artifactId>
<version>1.5</version>
<executions>
<execution>
<id>sign-artifacts</id>
<phase>verify</phase>
<goals>
<goal>sign</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</profile>
</profiles>
<profiles>
<profile>
<id>release</id>
<build>
<plugins>
&lt;!&ndash; Source &ndash;&gt;
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-source-plugin</artifactId>
<version>2.2.1</version>
<executions>
<execution>
<id>attach-sources</id>
<goals>
<goal>jar-no-fork</goal>
</goals>
</execution>
</executions>
</plugin>
&lt;!&ndash; Javadoc &ndash;&gt;
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-javadoc-plugin</artifactId>
<version>2.9.1</version>
<executions>
<execution>
<id>attach-javadocs</id>
<goals>
<goal>jar</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-gpg-plugin</artifactId>
<version>1.5</version>
<executions>
<execution>
<id>sign-artifacts</id>
<phase>verify</phase>
<goals>
<goal>sign</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</profile>
</profiles>-->
</project>

6
src/main/java/com/wf/captcha/Captcha.java
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@ -9,10 +9,10 @@ import java.io.OutputStream;
* Created by 王帆 on 2018-07-27 上午 10:08.
*/
public abstract class Captcha extends Randoms {
protected Font font = new Font("Verdana", Font.ITALIC | Font.BOLD, 28); // 字体
protected Font font = new Font("Verdana", Font.PLAIN, 32); // 字体
protected int len = 5; // 验证码随机字符长度
protected int width = 150; // 验证码显示宽度
protected int height = 40; // 验证码显示高度
protected int width = 130; // 验证码显示宽度
protected int height = 48; // 验证码显示高度
private String chars = null; // 当前验证码
/**

50
src/main/java/com/wf/captcha/Encoder.java
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@ -97,6 +97,13 @@ public class Encoder {
byte[] accum = new byte[256];
//----------------------------------------------------------------------------
/**
* @param width 宽度
* @param height 高度
* @param pixels 像素
* @param color_depth 颜色
*/
Encoder(int width, int height, byte[] pixels, int color_depth) {
imgW = width;
imgH = height;
@ -106,6 +113,12 @@ public class Encoder {
// Add a character to the end of the current packet, and if it is 254
// characters, flush the packet to disk.
/**
* @param c 字节
* @param outs 输出流
* @throws IOException IO异常
*/
void char_out(byte c, OutputStream outs) throws IOException {
accum[a_count++] = c;
if (a_count >= 254)
@ -115,6 +128,11 @@ public class Encoder {
// Clear out the hash table
// table clear for block compress
/**
* @param outs 输出流
* @throws IOException IO异常
*/
void cl_block(OutputStream outs) throws IOException {
cl_hash(hsize);
free_ent = ClearCode + 2;
@ -124,11 +142,20 @@ public class Encoder {
}
// reset code table
/**
* @param hsize int
*/
void cl_hash(int hsize) {
for (int i = 0; i < hsize; ++i)
htab[i] = -1;
}
/**
* @param init_bits int
* @param outs 输出流
* @throws IOException IO异常
*/
void compress(int init_bits, OutputStream outs) throws IOException {
int fcode;
int i /* = 0 */;
@ -201,6 +228,11 @@ public class Encoder {
}
//----------------------------------------------------------------------------
/**
* @param os 输出流
* @throws IOException IO异常
*/
void encode(OutputStream os) throws IOException {
os.write(initCodeSize); // write "initial code size" byte
@ -213,6 +245,11 @@ public class Encoder {
}
// Flush the packet to disk, and reset the accumulator
/**
* @param outs 输出流
* @throws IOException IO异常
*/
void flush_char(OutputStream outs) throws IOException {
if (a_count > 0) {
outs.write(a_count);
@ -221,6 +258,10 @@ public class Encoder {
}
}
/**
* @param n_bits int
* @return int
*/
final int MAXCODE(int n_bits) {
return (1 << n_bits) - 1;
}
@ -228,6 +269,10 @@ public class Encoder {
//----------------------------------------------------------------------------
// Return the next pixel from the image
//----------------------------------------------------------------------------
/**
* @return int
*/
private int nextPixel() {
if (remaining == 0)
return EOF;
@ -239,6 +284,11 @@ public class Encoder {
return pix & 0xff;
}
/**
* @param code int
* @param outs 输出流
* @throws IOException IO异常
*/
void output(int code, OutputStream outs) throws IOException {
cur_accum &= masks[cur_bits];

23
src/main/java/com/wf/captcha/GifCaptcha.java
View File

@ -1,9 +1,6 @@
package com.wf.captcha;
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
@ -82,12 +79,26 @@ public class GifCaptcha extends Captcha {
int h = height - ((height - font.getSize()) >> 1);
int w = width / len;
g2d.setFont(font);
// 随机画干扰线
for (int i = 0; i < 8; i++) {
int x1 = num(-10, width - 10);
int y1 = num(5, height - 5);
int x2 = num(10, width + 10);
int y2 = num(2, height - 2);
g2d.setColor(color(150, 250));
g2d.setStroke(new BasicStroke(1.3f));
g2d.drawLine(x1, y1, x2, y2);
// 画干扰圆圈
g2d.setColor(color(100, 250));
g2d.setStroke(new BasicStroke(1.0f));
g2d.drawOval(num(width), num(height), 5 + num(10), 5 + num(10));
}
// 画验证码
for (int i = 0; i < len; i++) {
ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, getAlpha(flag, i));
g2d.setComposite(ac3);
g2d.setColor(fontcolor[i]);
g2d.drawOval(num(width), num(height), 5 + num(10), 5 + num(10));
g2d.drawString(String.valueOf(strs[i]), (width - (len - i) * w) + (w - font.getSize()) + 1, h - 4);
g2d.drawString(String.valueOf(strs[i]), (width - (len - i) * w) + (w - font.getSize()) + num(7, 11), h - num(2, 6));
}
g2d.dispose();
return image;

25
src/main/java/com/wf/captcha/GifEncoder.java
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@ -79,7 +79,6 @@ public class GifEncoder {
* image is added.
*
* @param iter int number of iterations.
* @return
*/
public void setRepeat(int iter) {
if (iter >= 0) {
@ -168,6 +167,8 @@ public class GifEncoder {
* Flushes any pending data and closes output file.
* If writing to an OutputStream, the stream is not
* closed.
*
* @return boolean
*/
public boolean finish() {
if (!started) return false;
@ -219,7 +220,6 @@ public class GifEncoder {
* than 20 do not yield significant improvements in speed.
*
* @param quality int greater than 0.
* @return
*/
public void setQuality(int quality) {
if (quality < 1) quality = 1;
@ -319,6 +319,9 @@ public class GifEncoder {
/**
* Returns index of palette color closest to c
*
* @param c color
* @return int
*/
protected int findClosest(Color c) {
if (colorTab == null) return -1;
@ -365,6 +368,8 @@ public class GifEncoder {
/**
* Writes Graphic Control Extension
*
* @throws IOException IO异常
*/
protected void writeGraphicCtrlExt() throws IOException {
out.write(0x21); // extension introducer
@ -396,6 +401,8 @@ public class GifEncoder {
/**
* Writes Image Descriptor
*
* @throws IOException IO异常
*/
protected void writeImageDesc() throws IOException {
out.write(0x2c); // image separator
@ -419,6 +426,8 @@ public class GifEncoder {
/**
* Writes Logical Screen Descriptor
*
* @throws IOException IO异常
*/
protected void writeLSD() throws IOException {
// logical screen size
@ -437,6 +446,8 @@ public class GifEncoder {
/**
* Writes Netscape application extension to define
* repeat count.
*
* @throws IOException IO异常
*/
protected void writeNetscapeExt() throws IOException {
out.write(0x21); // extension introducer
@ -451,6 +462,8 @@ public class GifEncoder {
/**
* Writes color table
*
* @throws IOException IO异常
*/
protected void writePalette() throws IOException {
out.write(colorTab, 0, colorTab.length);
@ -462,6 +475,8 @@ public class GifEncoder {
/**
* Encodes and writes pixel data
*
* @throws IOException IO异常
*/
protected void writePixels() throws IOException {
Encoder encoder = new Encoder(width, height, indexedPixels, colorDepth);
@ -470,6 +485,9 @@ public class GifEncoder {
/**
* Write 16-bit value to output stream, LSB first
*
* @param value int
* @throws IOException IO异常
*/
protected void writeShort(int value) throws IOException {
out.write(value & 0xff);
@ -478,6 +496,9 @@ public class GifEncoder {
/**
* Writes string to output stream
*
* @param s string
* @throws IOException IO异常
*/
protected void writeString(String s) throws IOException {
for (int i = 0; i < s.length(); i++) {

36
src/main/java/com/wf/captcha/SpecCaptcha.java
View File

@ -1,9 +1,6 @@
package com.wf.captcha;
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
@ -59,30 +56,31 @@ public class SpecCaptcha extends Captcha {
BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D g = (Graphics2D) bi.getGraphics();
AlphaComposite ac3;
Color color;
int len = strs.length;
g.setColor(Color.WHITE);
g.fillRect(0, 0, width, height);
// 随机画干扰的圆圈
for (int i = 0; i < 15; i++) {
color = color(150, 250);
g.setColor(color);
g.drawOval(num(width), num(height), 5 + num(10), 5 + num(10));
color = null;
// 随机画干扰线
for (int i = 0; i < 12; i++) {
int x1 = num(-10, width - 10);
int y1 = num(5, height - 5);
int x2 = num(10, width + 10);
int y2 = num(2, height - 2);
g.setColor(color(150, 250));
g.setStroke(new BasicStroke(1.3f));
g.drawLine(x1, y1, x2, y2);
// 画干扰圆圈
g.setColor(color(100, 250));
g.drawOval(num(width), num(height), 5 + num(25), 5 + num(25));
}
g.setFont(font);
g.setFont(new Font(font.getFontName(), Font.ITALIC, font.getSize()));
int h = height - ((height - font.getSize()) >> 1);
int w = width / len;
int size = w - font.getSize() + 1;
// 画字符串
for (int i = 0; i < len; i++) {
ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.7f);// 指定透明度
ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.75f);// 指定透明度
g.setComposite(ac3);
color = new Color(20 + num(110), 20 + num(110), 20 + num(110));// 对每个字符都用随机颜色
g.setColor(color);
g.drawString(String.valueOf(strs[i]), (width - (len - i) * w) + size, h - 4);
color = null;
ac3 = null;
g.setColor(new Color(20 + num(110), 20 + num(110), 20 + num(110)));
g.drawString(String.valueOf(strs[i]), (width - (len - i) * w) + (w - font.getSize()) + num(7, 11), h - num(2, 6));
}
ImageIO.write(bi, "png", out);
out.flush();

30
src/main/java/com/wf/captcha/utils/CaptchaUtil.java
View File

@ -17,6 +17,10 @@ public class CaptchaUtil {
/**
* 验证验证码
*
* @param code 用户输入的验证码
* @param request HttpServletRequest
* @return 是否正确
*/
public static boolean ver(String code, HttpServletRequest request) {
if (code != null && !code.trim().isEmpty()) {
@ -29,26 +33,26 @@ public class CaptchaUtil {
/**
* 输出验证码
*
* @param request
* @param response
* @throws IOException
* @param request HttpServletRequest
* @param response HttpServletResponse
* @throws IOException IO异常
*/
public static void out(HttpServletRequest request, HttpServletResponse response)
throws IOException {
out(130, 38, 5, request, response);
out(5, request, response);
}
/**
* 输出验证码
*
* @param len 长度
* @param request
* @param response
* @throws IOException
* @param request HttpServletRequest
* @param response HttpServletResponse
* @throws IOException IO异常
*/
public static void out(int len, HttpServletRequest request, HttpServletResponse response)
throws IOException {
out(130, 38, len, request, response);
out(130, 48, len, request, response);
}
/**
@ -57,14 +61,14 @@ public class CaptchaUtil {
* @param width 宽度
* @param height 高度
* @param len 长度
* @param request
* @param response
* @throws IOException
* @param request HttpServletRequest
* @param response HttpServletResponse
* @throws IOException IO异常
*/
public static void out(int width, int height, int len, HttpServletRequest request, HttpServletResponse response)
throws IOException {
setHeader(response);
Captcha captcha = new GifCaptcha(130, 38, 5);
Captcha captcha = new GifCaptcha(width, height, len);
request.getSession().setAttribute(SESSION_KEY, captcha.text().toLowerCase());
captcha.out(response.getOutputStream());
}
@ -72,7 +76,7 @@ public class CaptchaUtil {
/**
* 设置相应头
*
* @param response
* @param response HttpServletResponse
*/
private static void setHeader(HttpServletResponse response) {
response.setContentType("image/gif");

4
src/test/java/com/wf/captcha/CaptchaTest.java
View File

@ -13,14 +13,14 @@ public class CaptchaTest {
@Test
public void test() throws Exception {
SpecCaptcha specCaptcha = new SpecCaptcha(150, 40, 4);
SpecCaptcha specCaptcha = new SpecCaptcha();
System.out.println(specCaptcha.text());
specCaptcha.out(new FileOutputStream(new File("D:/a/aa.png")));
}
@Test
public void testGIf() throws Exception {
GifCaptcha specCaptcha = new GifCaptcha(150, 40, 4);
GifCaptcha specCaptcha = new GifCaptcha(130, 48, 5);
System.out.println(specCaptcha.text());
specCaptcha.out(new FileOutputStream(new File("D:/a/aa.gif")));
}