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）