81 lines
2.2 KiB
Java
81 lines
2.2 KiB
Java
package com.wf.captcha.base;
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//import javax.script.ScriptEngine;
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//import javax.script.ScriptEngineManager;
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//import javax.script.ScriptException;
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/**
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* 算术验证码抽象类
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* Created by 王帆 on 2019-08-23 上午 10:08.
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*/
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public abstract class ArithmeticCaptchaAbstract extends Captcha {
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private String arithmeticString; // 计算公式
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protected static int difficulty = 10;
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protected static int algorithmSign = 4;
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public ArithmeticCaptchaAbstract() {
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setLen(2);
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}
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/**
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* 生成随机验证码
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*
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* @return 验证码字符数组
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*/
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@Override
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protected char[] alphas() {
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StringBuilder sb = new StringBuilder();
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for (int i = 0; i < len; i++) {
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sb.append(num(difficulty));
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if (i < len - 1) {
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int type = num(1, algorithmSign);
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if (type == 1) {
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sb.append("+");
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} else if (type == 2) {
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sb.append("-");
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} else if (type == 3) {
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sb.append("x");
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}
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}
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}
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// ScriptEngineManager manager = new ScriptEngineManager();
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// ScriptEngine engine = manager.getEngineByName("javascript");
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// try {
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// chars = String.valueOf(engine.eval(sb.toString().replaceAll("x", "*")));
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// } catch (ScriptException e) {
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// e.printStackTrace();
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// }
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int result = (int) Calculator.conversion(sb.toString().replaceAll("x", "*"));
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this.chars = String.valueOf(result);
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sb.append("=?");
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arithmeticString = sb.toString();
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return chars.toCharArray();
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}
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public String getArithmeticString() {
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checkAlpha();
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return arithmeticString;
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}
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public void setArithmeticString(String arithmeticString) {
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this.arithmeticString = arithmeticString;
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}
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public void setDifficulty(int difficulty) {
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this.difficulty = difficulty;
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}
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/**
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* algorithmSign 2 : 支持加法
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* algorithmSign 3 : 支持加减法
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* algorithmSign 4 : 支持加减乘法
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* @param algorithmSign 计算公式标示
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*/
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public void supportAlgorithmSign(int algorithmSign){
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this.algorithmSign = algorithmSign;
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}
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}
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