java生成验证码
2016-01-20 23:19
369 查看
public static void main(String args[]) {
String str = "";
for (int i = 0; i <= 9; i++) {
if (StringUtils.isBlank(str)) {
str += i;
} else {
str = str + "," + i;
}
}
for (int i = 97; i <= 122; i++) {
str = str + "," + (char) i;
}
for (int i = 65; i <= 90; i++) {
str = str + "," + (char) i;
}
str="按,时,及,问,哦,如,果,你,搜,的,佛,个,安,慰,爱,了,就,发,生,的,就,爱,上,了,啊,额,为";
System.out.println(str);
String str2[] = str.split(",");//将字符串以,分割
Random rand = new Random();//创建Random类的对象rand
int index = 0;
String randStr = "";//创建内容为空字符串对象randStr
for (int i = 0; i < 4; ++i) { //循环,生成对应长度的验证码
index = rand.nextInt(str2.length - 1);//在0到str2.length-1生成一个伪随机数赋值给index
System.out.println(index);
randStr += str2[index]; //取出对应下标的值
}
System.out.println("验证码:" + randStr);//输出验证码
//java调用cmd
try {
Runtime.getRuntime().exec("notepad");
} catch (IOException e) {
e.printStackTrace();
}
}
String str = "";
for (int i = 0; i <= 9; i++) {
if (StringUtils.isBlank(str)) {
str += i;
} else {
str = str + "," + i;
}
}
for (int i = 97; i <= 122; i++) {
str = str + "," + (char) i;
}
for (int i = 65; i <= 90; i++) {
str = str + "," + (char) i;
}
str="按,时,及,问,哦,如,果,你,搜,的,佛,个,安,慰,爱,了,就,发,生,的,就,爱,上,了,啊,额,为";
System.out.println(str);
String str2[] = str.split(",");//将字符串以,分割
Random rand = new Random();//创建Random类的对象rand
int index = 0;
String randStr = "";//创建内容为空字符串对象randStr
for (int i = 0; i < 4; ++i) { //循环,生成对应长度的验证码
index = rand.nextInt(str2.length - 1);//在0到str2.length-1生成一个伪随机数赋值给index
System.out.println(index);
randStr += str2[index]; //取出对应下标的值
}
System.out.println("验证码:" + randStr);//输出验证码
//java调用cmd
try {
Runtime.getRuntime().exec("notepad");
} catch (IOException e) {
e.printStackTrace();
}
}
相关文章推荐
- java对世界各个时区(TimeZone)的通用转换处理方法(转载)
- java-注解annotation
- java-模拟tomcat服务器
- java-用HttpURLConnection发送Http请求.
- java-WEB中的监听器Lisener
- Android IPC进程间通讯机制
- Android Native 绘图方法
- Android java 与 javascript互访(相互调用)的方法例子
- 介绍一款信息管理系统的开源框架---jeecg
- 聚类算法之kmeans算法java版本
- java实现 PageRank算法
- PropertyChangeListener简单理解
- c++11 + SDL2 + ffmpeg +OpenAL + java = Android播放器
- 插入排序
- 冒泡排序
- 堆排序
- 快速排序
- 二叉查找树