import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import java.math.BigDecimal;
import java.math.RoundingMode;/*** 判断数值是否在数学区间范围内** @author AnNong* @date 2023-04-07*/
public class IntervalUtil {public static ScriptEngine jse = new ScriptEngineManager().getEngineByName("JavaScript");/*** @Description: 比较dataValue与interval结果* @Param: [dataValue：比较值， interval：如 ≤0、≥0 、>0 、<0 、==0]* @return: boolean*/public static boolean compareNumValue(String dataValue, String interval) {//转换比较符号≤转换为<=，≥转换为>=String comparator = interval.replace("≤", "<=").replace("≥", ">=");//拼接表达式StringBuffer formula = new StringBuffer();formula.append("(");formula.append(dataValue);formula.append(comparator);formula.append(")");try {//计算表达式return (Boolean) jse.eval(formula.toString());} catch (Exception t) {return false;}}/*** 根据数学表达式计算结果** @param expression 表达式， 70/(1.73*1.73)* @param scala      四舍五入保留几位小数* @return*/public static String calcValue(String expression, int scala) {try {//计算表达式Object eval = jse.eval(expression);if (scala != 0) {BigDecimal result = new BigDecimal(eval.toString());result = result.setScale(2, RoundingMode.HALF_UP);return result.toString();}return String.valueOf(eval);} catch (Exception t) {return "";}}/*** 判断data_value是否在interval区间范围内** @param data_value 数值类型的* @param interval   正常的数学区间，包括无穷大等，如：(1,3)、>5%、(-∞,6]、(125%,135%)U(70%,80%)* @return true：表示data_value在区间interval范围内，false：表示data_value不在区间interval范围内*/public static boolean isInTheInterval(String data_value, String interval) {//将区间和data_value转化为可计算的表达式String formula = getFormulaByAllInterval(data_value, interval, "||");ScriptEngine jse = new ScriptEngineManager().getEngineByName("JavaScript");try {//计算表达式return (Boolean) jse.eval(formula);} catch (Exception t) {return false;}}/*** 将所有阀值区间转化为公式：如* [75,80)   =》        date_value < 80 && date_value >= 75* (125%,135%)U(70%,80%)   =》        (date_value < 1.35 && date_value > 1.25) || (date_value < 0.8 && date_value > 0.7)** @param date_value* @param interval   形式如：(125%,135%)U(70%,80%)* @param connector  连接符 如：") || ("*/private static String getFormulaByAllInterval(String date_value, String interval, String connector) {StringBuffer buff = new StringBuffer();for (String limit : interval.split("U")) {//如：（125%,135%）U (70%,80%)buff.append("(").append(getFormulaByInterval(date_value, limit, " && ")).append(")").append(connector);}String allLimitInvel = buff.toString();int index = allLimitInvel.lastIndexOf(connector);allLimitInvel = allLimitInvel.substring(0, index);return allLimitInvel;}/*** 将整个阀值区间转化为公式：如* 145)      =》         date_value < 145* [75,80)   =》        date_value < 80 && date_value >= 75** @param date_value* @param interval   形式如：145)、[75,80)* @param connector  连接符 如：&&*/private static String getFormulaByInterval(String date_value, String interval, String connector) {StringBuffer buff = new StringBuffer();for (String halfInterval : interval.split(",")) {//如：[75,80)、≥80buff.append(getFormulaByHalfInterval(halfInterval, date_value)).append(connector);}String limitInvel = buff.toString();int index = limitInvel.lastIndexOf(connector);limitInvel = limitInvel.substring(0, index);return limitInvel;}/*** 将半个阀值区间转化为公式：如* 145)      =》         date_value < 145* ≥80%      =》         date_value >= 0.8* [130      =》         date_value >= 130* <80%     =》         date_value < 0.8** @param halfInterval 形式如：145)、≥80%、[130、<80%* @param date_value* @return date_value < 145*/private static String getFormulaByHalfInterval(String halfInterval, String date_value) {halfInterval = halfInterval.trim();if (halfInterval.contains("∞")) {//包含无穷大则不需要公式return "1 == 1";}StringBuffer formula = new StringBuffer();String data = "";String opera = "";if (halfInterval.matches("^([<>≤≥\\[\\(]{1}(-?\\d+.?\\d*\\%?))$")) {//表示判断方向（如>）在前面 如：≥80%opera = halfInterval.substring(0, 1);data = halfInterval.substring(1);} else {//[130、145)opera = halfInterval.substring(halfInterval.length() - 1);data = halfInterval.substring(0, halfInterval.length() - 1);}double value = dealPercent(data);formula.append(date_value).append(" ").append(opera).append(" ").append(value);String a = formula.toString();//转化特定字符return a.replace("[", ">=").replace("(", ">").replace("]", "<=").replace(")", "<").replace("≤", "<=").replace("≥", ">=");}/*** 去除百分号，转为小数** @param str 可能含百分号的数字* @return*/private static double dealPercent(String str) {double d = 0.0;if (str.contains("%")) {str = str.substring(0, str.length() - 1);d = Double.parseDouble(str) / 100;} else {d = Double.parseDouble(str);}return d;}public static void main(String[] args) {// 年龄大于等于35岁或小于等于18岁
//        String c = "(-∞,18]U[35,+∞)";
//        System.out.println(isInTheInterval("36", c));
//        System.out.println(isInTheInterval("18", c));
//        System.out.println(isInTheInterval("17", c));ScriptEngine jse = new ScriptEngineManager().getEngineByName("JavaScript");try {//计算表达式String e = "70/(1.73*1.73)";System.out.println(jse.eval(e));} catch (Exception t) {t.printStackTrace();}
//
//
//        String d = "[40,+∞)";
//        System.out.println(isInTheInterval("40", c));
//        System.out.println(isInTheInterval("41", c));
//
//        //判断区间范围
//        System.out.println(isInTheInterval("2", "(1,3]"));//比较dataValue与interval结果}}