QLExpress 是一个轻量级的类java语法规则引擎,作为一个嵌入式规则引擎在业务系统中使用。让业务规则定义简便而不失灵活。让业务人员就可以定义业务规则。支持标 准的JAVA语法,还可以支持自定义操作符号、操作符号重载、 函数定义、宏定义、数据延迟加载等。

QLExpress可以执行标准的java语法,例如 '哈哈'.equals('哈哈')、if(true) {1} else{2}等,可以动态获取运算结果。

QLExpress 3.0.6下载地址:http://code.taobao.org/p/QLExpress/file/2949/qlexpress-3.0.6.zip

wiki地址:http://code.taobao.org/p/QLExpress/wiki/index/

demo代码如下:

package com.test;
import com.ql.util.express.ExpressRunner; public class Test {
/**
*
* @return void
* @throws Exception
*/
public static void main(String[] args) throws Exception {
String express1 = " 1 in (2) ";
String express2 = " if(false){ 1} else{2} ";
String express3 = " round(4.34,1) ";
String express4 = " '哈哈'.equals('哈哈') ";
ExpressRunner runner = new ExpressRunner(); System.out.println("表达式计算:" + express1 + " 处理结果: " + runner.execute(express1, null, null, false, false) );
System.out.println("表达式计算:" + express2 + " 处理结果: " + runner.execute(express2, null, null, false, false) );
System.out.println("表达式计算:" + express3 + " 处理结果: " + runner.execute(express3, null, null, false, false) );
System.out.println("表达式计算:" + express4 + " 处理结果: " + runner.execute(express4, null, null, false, false) ); }
}

代码运行截图:

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" 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