自动生成数学题型二（框架struts2）题型如（（a+b)*c=d)

1. 生成题目

1.1 生成单个题目

public static String[] twoOperatorAndOperator(int num1, int num2) {
        double first = generate(num1, num2);
        double secound = generate(num1, num2);
        double third = generate(num1, num2);
        System.out.println(num1+" num1");
        System.out.println(num2+" num2");
        int zero = 0;
        zero=generate(1, 28);
        System.out.println(zero + "  zero");
        switch (zero) {
        case 1:
            double result = first + secound + third;
            String[] addAndAdd = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                    String.format("%.0f", third), String.format("%.0f", result), String.valueOf(1), "+", "+", null,
                    null, null, null };
            return addAndAdd;
        case 2:
            if (first + secound >= third) {
                double result2 = first + secound - third;
                String[] addAndSub = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                        String.format("%.0f", third), String.format("%.0f", result2), String.valueOf(2), "+", "-", null,
                        null, null, null };
                return addAndSub;
            } else {
                double result2 = third + secound - first;
                String[] addAndSub = new String[] { String.format("%.0f", third), String.format("%.0f", secound),
                        String.format("%.0f", first), String.format("%.0f", result2), String.valueOf(2), "+", "-", null,
                        null, null, null };
                return addAndSub;
            }
        case 3:
            double result3 = first + secound * third;
            String[] addAndMul = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                    String.format("%.0f", third), String.format("%.0f", result3), String.valueOf(3), "+", "*", null,
                    null, null, null };
            return addAndMul;
        case 4:
            if (third != 0) {
                double result4 = first + secound / third;
                String[] addAndDiv = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                        String.format("%.0f", third), String.format("%.2f", result4), String.valueOf(4), "+", "/", null,
                        null, null, null };
                return addAndDiv;
            } else {
                twoOperatorAndOperator(num1, num2);
            }
        case 5:
            if (first - secound + third >= 0) {
                double result5 = first - secound + third;
                String[] SubAndAdd = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                        String.format("%.0f", third), String.format("%.0f", result5), String.valueOf(5), "-", "+", null,
                        null, null, null };
                return SubAndAdd;
            } else {
                double result5 = secound - first - third;
                String[] SubAndAdd = new String[] { String.format("%.0f", secound), String.format("%.0f", first),
                        String.format("%.0f", third), String.format("%.0f", result5), String.valueOf(5), "-", "-", null,
                        null, null, null };
                return SubAndAdd;
            }
        case 6:
            if (first - secound - third >= 0) {
                double result6 = first - secound - third;
                String[] SubAndSub = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                        String.format("%.0f", third), String.format("%.0f", result6), String.valueOf(6), "-", "-", null,
                        null, null, null };
                return SubAndSub;
            } else {
                double result6 = third + secound - first;
                String[] SubAndSub = new String[] { String.format("%.0f", third), String.format("%.0f", secound),
                        String.format("%.0f", first), String.format("%.0f", result6), String.valueOf(6), "+", "-", null,
                        null, null, null };
                return SubAndSub;
            }
        case 7:
            if (first - secound * third > 0) {
                double result7 = first - secound * third;
                String[] SubAndMul = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                        String.format("%.0f", third), String.format("%.0f", result7), String.valueOf(7), "-", "*", null,
                        null, null, null };
                return SubAndMul;
            } else {
                double result7 = third * secound - first;
                String[] SubAndMul = new String[] { String.format("%.0f", third), String.format("%.0f", secound),
                        String.format("%.0f", first), String.format("%.0f", result7), String.valueOf(7), "*", "-", null,
                        null, null, null };
                return SubAndMul;
            }

        case 8:
            if (third != 0) {
                if (first - secound / third > 0) {
                    double result8 = first - secound / third;
                    String[] SubAndDiv = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                            String.format("%.0f", third), String.format("%.2f", result8), String.valueOf(8), "-", "/",
                            null, null, null, null };
                    return SubAndDiv;
                } else {
                    double result8 = secound / third - first;
                    String[] SubAndDiv = new String[] { String.format("%.0f", secound), String.format("%.0f", third),
                            String.format("%.0f", first), String.format("%.2f", result8), String.valueOf(8), "/", "-",
                            null, null, null, null };
                    return SubAndDiv;
                }
            } else {
                twoOperatorAndOperator(num1, num2);
            }
        case 9:
            double result9 = first * secound + third;
            String[] MulAndAdd = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                    String.format("%.0f", third), String.format("%.0f", result9), String.valueOf(9), "*", "+", null,
                    null, null, null };
            return MulAndAdd;
        case 10:
            if (first * secound - third > 0) {
                double result10 = first * secound - third;
                String[] MulAndSub = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                        String.format("%.0f", third), String.format("%.0f", result10), String.valueOf(10), "*", "-",
                        null, null, null, null };
                return MulAndSub;
            } else {
                double result10 = third - first * secound;
                String[] MulAndSub = new String[] { String.format("%.0f", third), String.format("%.0f", first),
                        String.format("%.0f", secound), String.format("%.0f", result10), String.valueOf(10), "-", "*",
                        null, null, null, null };
                return MulAndSub;
            }

        case 11:
            double result11 = first * secound * third;
            String[] MulAndMul = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                    String.format("%.0f", third), String.format("%.0f", result11), String.valueOf(11), "*", "*", null,
                    null, null, null };
            return MulAndMul;
        case 12:
            if (third != 0) {
                double result12 = first * secound / third;
                String[] MulAndDiv = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                        String.format("%.0f", third), String.format("%.2f", result12), String.valueOf(12), "*", "/",
                        null, null, null, null };
                return MulAndDiv;
            } else {
                twoOperatorAndOperator(num1, num2);
            }
        case 13:
            if (secound != 0) {
                double result13 = first / secound + third;
                String[] DivAndAdd = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                        String.format("%.0f", third), String.format("%.2f", result13), String.valueOf(13), "/", "+",
                        null, null, null, null };
                return DivAndAdd;
            } else {
                twoOperatorAndOperator(num1, num2);
            }
        case 14:
            if (secound > 0) {
                if (first / secound - third > 0) {
                    double result14 = first / secound - third;
                    String[] DivAndSub = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                            String.format("%.0f", third), String.format("%.2f", result14), String.valueOf(14), "/", "-",
                            null, null, null, null };
                    return DivAndSub;
                } else {
                    double result14 = third - first / secound;
                    String[] DivAndSub = new String[] { String.format("%.0f", third), String.format("%.0f", first),
                            String.format("%.0f", secound), String.format("%.2f", result14), String.valueOf(14), "-",
                            "/", null, null, null, null };
                    return DivAndSub;
                }
            } else {
                twoOperatorAndOperator(num1, num2);
            }
        case 15:
            if (secound != 0) {
                double result15 = first / secound * third;
                String[] DivAndMul = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                        String.format("%.0f", third), String.format("%.2f", result15), String.valueOf(15), "/", "*",
                        null, null, null, null };
                return DivAndMul;
            } else {
                twoOperatorAndOperator(num1, num2);
            }
        case 16:
            if (secound != 0 && third != 0) {
                double result16 = first / secound / third;
                String[] DivAndDiv = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                        String.format("%.0f", third), String.format("%.2f", result16), String.valueOf(16), "/", "/",
                        null, null, null, null };
                return DivAndDiv;
            } else {
                twoOperatorAndOperator(num1, num2);
            }
        case 17:
            double result17 = (first + secound) * third;
            String[] AddAndMul2 = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                    String.format("%.0f", third), String.format("%.0f", result17), String.valueOf(17), "+", "*", "(",
                    null, ")", null };
            return AddAndMul2;
        case 18:
            if (third != 0) {
                double result18 = (first + secound) / third;
                String[] AddAndDiv2 = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                        String.format("%.0f", third), String.format("%.2f", result18), String.valueOf(18), "+", "/",
                        "(", null, ")", null };
                return AddAndDiv2;
            } else {
                twoOperatorAndOperator(num1, num2);
            }
        case 19:
            if (first > secound) {
                double result19 = (first - secound) * third;
                String[] SubAndMul2 = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                        String.format("%.0f", third), String.format("%.0f", result19), String.valueOf(19), "-", "*",
                        "(", null, ")", null };
                return SubAndMul2;
            } else {
                double result19 = (secound - first) * third;
                String[] SubAndMul2 = new String[] { String.format("%.0f", secound), String.format("%.0f", first),
                        String.format("%.0f", third), String.format("%.0f", result19), String.valueOf(19), "-", "*",
                        "(", null, ")", null };
                return SubAndMul2;
            }
        case 20:
            if (third != 0) {
                double result20 = (first + secound) / third;
                String[] SubAndDiv2 = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                        String.format("%.0f", third), String.format("%.2f", result20), String.valueOf(20), "+", "/",
                        "(", null, ")", null };
                return SubAndDiv2;
            } else {
                twoOperatorAndOperator(num1, num2);
            }
        case 21:
            double result21 = first * (secound + third);
            String[] MulAndAdd2 = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                    String.format("%.0f", third), String.format("%.0f", result21), String.valueOf(21), "*", "+", null,
                    "(", null, ")" };
            return MulAndAdd2;
        case 22:
            if (secound > third) {
                double result22 = first * (secound - third);
                String[] MulAndSub2 = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                        String.format("%.0f", third), String.format("%.2f", result22), String.valueOf(22), "*", "-",
                        null, "(", null, ")" };
                return MulAndSub2;
            } else {
                double result22 = first * (third - secound);
                String[] MulAndSub2 = new String[] { String.format("%.0f", first), String.format("%.0f", third),
                        String.format("%.0f", secound), String.format("%.2f", result22), String.valueOf(22), "*", "-",
                        null, "(", null, ")" };
                return MulAndSub2;
            }
        case 23:
            if ((secound + third) != 0) {
                double result23 = first / (secound + third);
                String[] DivAndAdd2 = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                        String.format("%.0f", third), String.format("%.2f", result23), String.valueOf(23), "/", "+",
                        null, "(", null, ")" };
                return DivAndAdd2;
            } else {
                twoOperatorAndOperator(num1, num2);
            }
        case 24:
            if (secound > third) {
                double result24 = first / (secound - third);
                String[] DivAndSub2 = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                        String.format("%.0f", third), String.format("%.2f", result24), String.valueOf(24), "/", "-",
                        null, "(", null, ")" };
                return DivAndSub2;
            } else if (secound < third) {
                double result24 = first / (third - secound);
                String[] DivAndSub2 = new String[] { String.format("%.0f", first), String.format("%.0f", third),
                        String.format("%.0f", secound), String.format("%.2f", result24), String.valueOf(24), "/", "-",
                        null, "(", null, ")" };
                return DivAndSub2;
            } else {
                twoOperatorAndOperator(num1, num2);
            }
        case 25:
            double result25 = first * (secound * third);
            String[] MulAndMul2 = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                    String.format("%.0f", third), String.format("%.0f", result25), String.valueOf(25), "*", "*", null,
                    "(", null, ")" };
            return MulAndMul2;

        case 26:
            if (third != 0) {
                double result26 = first * (secound / third);
                String[] MulAndDiv2 = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                        String.format("%.0f", third), String.format("%.2f", result26), String.valueOf(26), "*", "/",
                        null,  "(", null, ")" };
                return MulAndDiv2;
            } else {
                twoOperatorAndOperator(num1, num2);
            }
             
        case 27:
            if (secound*third != 0) {
                double result27 = first / (secound * third);
                String[] DivAndMul2 = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                        String.format("%.0f", third), String.format("%.2f", result27), String.valueOf(27), "/", "*",
                        null, "(", null, ")" };
                return DivAndMul2;
            } else {
                twoOperatorAndOperator(num1, num2);
            }
        case 28:
            if(secound / third!=0&& third!=0){
                double result28 = first / (secound / third);
                String[] DivAndDiv2 = new String[] { String.format("%.0f", first), String.format("%.0f", secound),
                        String.format("%.0f", third), String.format("%.2f", result28), String.valueOf(28), "/", "/",
                        null, "(", null, ")" };
                return DivAndDiv2;
            }else {
                twoOperatorAndOperator(num1, num2);
            }
        default:
            break;
        }
        return null;

    }

1.2 生成指定数目和范围的题目

/**
     * twoOperator2() 方法，处理参数，并形成新的list集合的对象放入到session中，网页遍历可直接获取
     * 
     * @param exerciseNumber
     *            生成题目数量
     * @param num1
     *            定义起始范围 num1
     * @param num2
     *            定义起始范围 num2
     * @return 返回list集合exerciseTwoOperators
     */

    public static List<TwoOperators> twoOperator2(int exerciseNumber, int num1, int num2) {

        List<TwoOperators> exerciseTwoOperators = new ArrayList<TwoOperators>();
        TwoOperators twoOperator = null;
        for (int i = 0; i < exerciseNumber; i++) {
            String[] twoOperatorAndOperator = twoOperatorAndOperator(num1, num2);
            try {
                twoOperator = new TwoOperators(twoOperatorAndOperator[0], twoOperatorAndOperator[1],
                        twoOperatorAndOperator[2], twoOperatorAndOperator[3], twoOperatorAndOperator[5],
                        twoOperatorAndOperator[6], twoOperatorAndOperator[7], twoOperatorAndOperator[8],
                        twoOperatorAndOperator[9], twoOperatorAndOperator[10]);
                exerciseTwoOperators.add(twoOperator);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return exerciseTwoOperators;

    }

1.3 action类中的代码

public class ThirdGrade {
    private int min;
    private int max;
    private int exerciseNumber;
    public int getMin() {
        return min;
    }
    public void setMin(int min) {
        this.min = min;
    }
    public int getMax() {
        return max;
    }
    public void setMax(int max) {
        this.max = max;
    }
    public int getExerciseNumber() {
        return exerciseNumber;
    }
    public void setExerciseNumber(int exerciseNumber) {
        this.exerciseNumber = exerciseNumber;
    }
    
    public String execute(){
        
        ActionContext actioncontext = ActionContext.getContext();
        Map<String, Object> session = actioncontext.getSession();
        count2 cou2=new count2();
        @SuppressWarnings("static-access")
        List<TwoOperators> twoOperators=cou2.twoOperator2(exerciseNumber, min, max);
        System.out.println("twoOperators = "+twoOperators);
        session.put("twoOperators", twoOperators);
        return "thirdGradeSuccess";
    }
    
}

2 .运行结果截图

2.1 初始界面

2.2 用户填写

2.3 回答问题页面

2.4 回答问题

2.5 判断回答结果（判断结果代码在之后）