boolean表达式转换成json表达式的java代码

以下是将布尔表达式转换为 JSON 格式的 Java 代码示例：

import java.util.ArrayList;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONObject;

public class BooleanToJson {

  public static void main(String[] args) {
    String expression = "(a AND b) OR (c AND d)";
    JSONObject jsonExpression = convertToJSON(expression);
    System.out.println(jsonExpression.toString());
  }

  public static JSONObject convertToJSON(String expression) {
    String[] tokens = expression.split(" ");
    List<String> operators = new ArrayList<>();
    List<String> operands = new ArrayList<>();

    for (String token : tokens) {
      if (token.equalsIgnoreCase("AND") || token.equalsIgnoreCase("OR")) {
        operators.add(token);
      } else if (!token.equalsIgnoreCase("(") && !token.equalsIgnoreCase(")")) {
        operands.add(token);
      }
    }

    return buildJSONExpression(operands, operators);
  }

  private static JSONObject buildJSONExpression(List<String> operands, List<String> operators) {
    if (operands.size() == 1) {
      return new JSONObject().put("var", operands.get(0));
    }

    JSONArray jsonArray = new JSONArray();
    for (int i = 0; i < operators.size(); i++) {
      String operator = operators.get(i);
      String operand = operands.get(i);

      if (operand.contains("(")) {
        int j = i + 1;
        int count = 0;
        while (j < operands.size()) {
          if (operands.get(j).contains("(")) {
            count++;
          }
          if (operands.get(j).contains(")")) {
            count--;
          }
          operand += " " + operands.get(j);
          if (count == 0) {
            break;
          }
          j++;
        }
        operands.subList(i + 1, j + 1).clear();
        jsonArray.put(buildJSONExpression(parseOperands(operand), parseOperators(operand)));
        i = j - 1;
      } else {
        jsonArray.put(new JSONObject().put("var", operand));
      }

      if (i == operators.size() - 1) {
        String lastOperand = operands.get(operands.size() - 1);
        if (lastOperand.contains("(")) {
          jsonArray.put(buildJSONExpression(parseOperands(lastOperand), parseOperators(lastOperand)));
        } else {
          jsonArray.put(new JSONObject().put("var", lastOperand));
        }
      }
      jsonArray.put(new JSONObject().put(operator.toLowerCase(), new JSONArray()));
    }

    return jsonArray.getJSONObject(0);
  }

  private static List<String> parseOperands(String expression) {
    String[] tokens = expression.split(" ");
    List<String> operands = new ArrayList<>();

    for (String token : tokens) {
      if (!token.equalsIgnoreCase("(") && !token.equalsIgnoreCase(")")) {
        operands.add(token);
      }
    }

    return operands;
  }

  private static List<String> parseOperators(String expression) {
    String[] tokens = expression.split(" ");
    List<String> operators = new ArrayList<>();

    for (String token : tokens) {
      if (token.equalsIgnoreCase("AND") || token.equalsIgnoreCase("OR")) {
        operators.add(token);
      }
    }

    return operators;
  }
}

该代码将布尔表达式转换为 JSON 格式，并输出 JSON 字符串。您只需将 `expression` 变量替换为您要转换的布尔表达式即可。