Java数据处理的实例代码

  1 package com.test;  2   3 import net.sourceforge.jeval.Evaluator;  4   5 public class T1 {  6   7     public static void main(String[] args) throws Exception {  8         String cOndition="(TYPE=SITA##)&&(((CTYP=FPL##)||(CTYP=CHG##)||(CTYP=CNL##)||(CTYP=DLA##)||(CTYP=DL##)||(CTYP=ED##))&&(ADEP=ZSSS##))";  9         cOndition= replaceExpression(condition, "TYPE=", "SITA", "="); 10         cOndition= replaceExpression(condition, "CTYP=", "FPL", "="); 11         cOndition= replaceExpression(condition, "ADEP=", "", "="); 12         System.out.println("condition："+condition);  //condition：(1)&&(((1)||(0)||(0)||(0)||(0)||(0))&&(0)) 13          14         /** 15          * 数字表达式解析工具 16          *    Evaluator需要下载jeval包，本文后附上链接 17          */ 18         Evaluator evaluator = new Evaluator(); 19         boolean b = evaluator.getBooleanResult(condition);  // false 20         System.out.println(b);         21         System.out.println(evaluator.evaluate("2+3"));  // 5.0 22          23     } 24      25     /** 26      *  27      * @param condition 28      * @param replace 29      * @param toBeCompared 30      * @param operators 31      * @return 32      * @throws Exception 对于不符合计算的会抛出异常 33      */ 34     public static String replaceExpression(String condition, String replace, 35             String toBeCompared, String operators) throws Exception { 36         while (condition.contains(replace)) { 37             int start = condition.indexOf(replace); 38             int end = condition.indexOf("##", start); 39             String express = condition.substring(start, end); 40             express = express.substring(replace.length()); 41             if (">=".equals(operators)) { 42  43                 if (Long.parseLong(toBeCompared) >= Long.parseLong(express)) { 44                     cOndition= condition.substring(0, start) + "1" 45                             + condition.substring(end + 2); 46                 } else { 47                     cOndition= condition.substring(0, start) + "0" 48                             + condition.substring(end + 2); 49                 } 50             } else if ("<=".equals(operators)) { 51                 if (Long.parseLong(toBeCompared) <= Long.parseLong(express)) { 52                     cOndition= condition.substring(0, start) + "1" 53                             + condition.substring(end + 2); 54                 } else { 55                     cOndition= condition.substring(0, start) + "0" 56                             + condition.substring(end + 2); 57                 } 58             } else if (">".equals(operators)) { 59  60                 if (Long.parseLong(toBeCompared) > Long.parseLong(express)) { 61                     cOndition= condition.substring(0, start) + "1" 62                             + condition.substring(end + 2); 63                 } else { 64                     cOndition= condition.substring(0, start) + "0" 65                             + condition.substring(end + 2); 66                 } 67             } else if ("<".equals(operators)) { 68                 if (Long.parseLong(toBeCompared)