Java数据处理

　　对于形如“(TYPE=SITA##)&&(((CTYP=FPL##)||(CTYP=CHG##)||(CTYP=CNL##)||(CTYP=DLA##)||(CTYP=DL##)||(CTYP=ED##))&&(ADEP=ZSSS##))”的字符串，常以某个事物的判定条件出现，要计算出整个条件最后的结果（true/false）。

　　以下给出Java代码

 package com.test;

 import net.sourceforge.jeval.Evaluator;

 public class T1 {

     public static void main(String[] args) throws Exception {
         String condition ="(TYPE=SITA##)&&(((CTYP=FPL##)||(CTYP=CHG##)||(CTYP=CNL##)||(CTYP=DLA##)||(CTYP=DL##)||(CTYP=ED##))&&(ADEP=ZSSS##))";
         condition = replaceExpression(condition, "TYPE=", "SITA", "=");
         condition = replaceExpression(condition, "CTYP=", "FPL", "=");
         condition = replaceExpression(condition, "ADEP=", "", "=");
         System.out.println("condition："+condition);  //condition：(1)&&(((1)||(0)||(0)||(0)||(0)||(0))&&(0))

         /**
          * 数字表达式解析工具
          *    Evaluator需要下载jeval包，本文后附上链接
          */
         Evaluator evaluator = new Evaluator();
         boolean b = evaluator.getBooleanResult(condition);  // false
         System.out.println(b);
         System.out.println(evaluator.evaluate("2+3"));  // 5.0

     }

     /**
      *
      * @param condition
      * @param replace
      * @param toBeCompared
      * @param operators
      * @return
      * @throws Exception 对于不符合计算的会抛出异常
      */
     public static String replaceExpression(String condition, String replace,
             String toBeCompared, String operators) throws Exception {
         while (condition.contains(replace)) {
             int start = condition.indexOf(replace);
             int end = condition.indexOf("##", start);
             String express = condition.substring(start, end);
             express = express.substring(replace.length());
             if (">=".equals(operators)) {

                 if (Long.parseLong(toBeCompared) >= Long.parseLong(express)) {
                     condition = condition.substring(0, start) + "1"
                             + condition.substring(end + 2);
                 } else {
                     condition = condition.substring(0, start) + "0"
                             + condition.substring(end + 2);
                 }
             } else if ("<=".equals(operators)) {
                 if (Long.parseLong(toBeCompared) <= Long.parseLong(express)) {
                     condition = condition.substring(0, start) + "1"
                             + condition.substring(end + 2);
                 } else {
                     condition = condition.substring(0, start) + "0"
                             + condition.substring(end + 2);
                 }
             } else if (">".equals(operators)) {

                 if (Long.parseLong(toBeCompared) > Long.parseLong(express)) {
                     condition = condition.substring(0, start) + "1"
                             + condition.substring(end + 2);
                 } else {
                     condition = condition.substring(0, start) + "0"
                             + condition.substring(end + 2);
                 }
             } else if ("<".equals(operators)) {
                 if (Long.parseLong(toBeCompared) < Long.parseLong(express)) {
                     condition = condition.substring(0, start) + "1"
                             + condition.substring(end + 2);
                 } else {
                     condition = condition.substring(0, start) + "0"
                             + condition.substring(end + 2);
                 }
             } else if ("!=".equals(operators)) {
                 if (!express.equals(toBeCompared)) {
                     condition = condition.substring(0, start) + "1"
                             + condition.substring(end + 2);
                 } else {
                     condition = condition.substring(0, start) + "0"
                             + condition.substring(end + 2);
                 }
             } else {
                 if ("RADDRESS=".equals(replace)) {
                     String[] toBeComparedArray = toBeCompared.split(" ");
                     String flag = "0";
                     for (String toBeComparedString : toBeComparedArray) {
                         if (express.equals(toBeComparedString)) {
                             flag = "1";
                             break;
                         }
                     }
                     condition = condition.substring(0, start) + flag
                             + condition.substring(end + 2);

                 } else {
                     if (express.equals(toBeCompared)) {
                         condition = condition.substring(0, start) + "1"
                                 + condition.substring(end + 2);
                     } else {
                         condition = condition.substring(0, start) + "0"
                                 + condition.substring(end + 2);
                     }
                 }
             }
         }
         return condition;
     }
 }

相关jar包下载：http://files.cnblogs.com/files/x-jingxin/jeval.zip