project description:
this project only for web validation code generating. we provide this tool cause there no security enough validation-code-image generator. this tool provide 4 kind of valid-code image generators. as follows:
this project refer the gifencoder
项目作用： 主要用于生成web动态验证码图片。主要应用场景为web 页面上需要用户输入验证码才能进行操作的地方。 开发原因： 目前网络广为流传的代码所生成的验证码图片太简单，并易于破解。所以我们自己开发了一个简单的验证码生成包，增加了背景的干扰性。 features：
- 提供1中png格式的图片生成器，3种gif格式图片生成器。
- 随机码由生成器自身生成。
- 可一定程度自定义背景干扰图形参数
感谢： 该项目用于生成gif图片编码器使用了 gifencoder 项目
图片示例 mapping from generator to image style
PngVCGenerator: 
GifVCGenerator: 
GifVCGenerator2: 
GifVCGenerator3: 
国内如果不能查看github中readme的图片，可参考https://blog.51cto.com/14234228/2492600 更新自己本地的github dns
add dependency to your pom.xml：
<dependency> <groupId>com.github.botaruibo</groupId> <artifactId>xvcode</artifactId> <version>1.0</version> </dependency> ####### Code Examples
package test import java.io.FileOutputStream; import java.io.IOException; import com.github.botaruibo.xvcode.generator.Generator; import com.github.botaruibo.xvcode.generator.Gif2VCGenerator; import com.github.botaruibo.xvcode.generator.Gif3VCGenerator; import com.github.botaruibo.xvcode.generator.GifVCGenerator; import com.github.botaruibo.xvcode.generator.PngVCGenerator; class Test { //生成验证码图片到本地磁盘 draw image and save to disk public void main(String args[]) throws IOException { String path = ".";//图片存储路径 path for image save Integer height = 40;//image 高度。 image height. count as pixel Integer width = 200;//image 宽度。 image width. count as pixel Integer count = 5; // validation code length. String validCode = null; //验证码 Generator generator = new PngVCGenerator(width, height, count); generator.write2out(new FileOutputStream(path + "/1.png")).close(); validCode = generator.text(); //get the validation code as 'String' System.out.println(validCode); generator = new GifVCGenerator(width, height, count);// gif generator.write2out(new FileOutputStream(path + "/1.gif")).close(); validCode = generator.text(); System.out.println(validCode); generator = new Gif2VCGenerator(width, height, count);// gif generator.write2out(new FileOutputStream(path + "/2.gif")).close(); validCode = generator.text(); System.out.println(validCode); generator = new Gif3VCGenerator(width, height, count);// gif generator.write2out(new FileOutputStream(path + "/3.gif")).close(); validCode = generator.text(); System.out.println(validCode); } } the generator.write2out() method proved the ability to write the image binary to any OutputStream object. this especially convenience for servlet request
如果要将验证码图片以流的方式穿到前端，可以直接使用*generator.write2out()*方法
use the xvcode-1.0-SNAPSHOT-cl.jar file to generate valid-code image directly to disk. command like:
可以使用jar包直接生成本地图片。命令：
java -jar xvcode-1.0-SNAPSHOT-cl usage :
支持参数如下：
usage: -p dir path for the image, default generate in current dir -h image height, between 50 to 500, default 200 -w image width, between 30 to 300, default 40 -cl validation code length, between 2 to 10, default 5 example:
例如：
java -jar xvcode-1.0-SNAPSHOT-cl -p test/ -h 300 -w 60 -cl 7