aviator 表达式对象跟JSON结合使用方法

冷不防 2022-12-31 14:26 345阅读 0赞

1，先看一个网站：

[http://www.jsontest.cn/][http_www.jsontest.cn]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMxODY2Nzkz_size_16_color_FFFFFF_t_70][]

2，实践出真知，JSON对象跟实体对象都可以这么搞：

package com.aviator;
    
    /**
     * @program: flinkcep
     * @description:
     * @author: Mr.Wang
     * @create: 2020-11-30 18:04
     **/
    import java.util.Date;
    import java.util.HashMap;
    import java.util.Map;
    
    import com.alibaba.fastjson.JSON;
    import com.alibaba.fastjson.JSONObject;
    import com.googlecode.aviator.AviatorEvaluator;
    import com.googlecode.aviator.Expression;
    
    public class TestAviator2 {
        int i;
        float f;
        Date date;
    
        public TestAviator2(final int i, final float f, final Date date) {
            this.i = i;
            this.f = f;
            this.date = date;
        }
    
        public int getI() {
            return this.i;
        }
    
        public void setI(final int i) {
            this.i = i;
        }
    
        public float getF() {
            return this.f;
        }
    
        public void setF(final float f) {
            this.f = f;
        }
    
        public Date getDate() {
            return this.date;
        }
    
        public void setDate(final Date date) {
            this.date = date;
        }
    
        public static void main(final String[] args) {
    
            String  aaa = "{\n" +
                    "\t\"name\": \"桔子桑\",\n" +
                    "\t\"sex\": \"男\",\n" +
                    "\t\"age\": 18,\n" +
                    "\t\"grade\": {\n" +
                    "\t\t\"gname\": \"1\",\n" +
                    "\t\t\"gdesc\": \"初三年级八班\"\n" +
                    "\t}\n" +
                    "}";
    
            Map<String, Object> env2 = new HashMap<String, Object>();
            env2.put("aa",JSON.parseObject(aaa));
            System.out.println("========> "+AviatorEvaluator.execute("aa.grade.gname==\"1\"", env2));
    
            TestAviator2 foo = new TestAviator2(100, 3.14f, new Date());
            Map<String, Object> env = new HashMap<String, Object>();
    
    
            env.put("foo", foo);
            System.out.println(AviatorEvaluator.execute("'foo.i = '+foo.i", env));
            System.out.println(AviatorEvaluator.execute("'foo.f = '+foo.f", env));
            System.out.println(AviatorEvaluator.execute("'foo.date.year = '+ (foo.date.year+1990)", env));
            String expression = "a>b";
            Map<String, Object> map = new HashMap<String, Object>();
            map.put("a",2);
            map.put("b",1);
            Expression execute =   AviatorEvaluator.compile(expression);
            Object execute1 = execute.execute(map);
    
    
            String valueStr ="a=='443b6ea6bc117c'&&b=='4'&&c=='/publicLog/appAttack'";
    //        JSONObject valueStrJson = strToMap(valueStr);
            Expression expressionBean = AviatorEvaluator.compile(valueStr,true);
            for (int i = 0; i < 1; i++) {
                long start = System.currentTimeMillis();
    
    //            Expression expressionBean = AviatorEvaluator.compile(valueStr);
                // 转成Map格式
    //        Map<String, Object> logCompareMap = JSON.parseObject(logBeanStr, Map.class);
                Map<String, Object> logCompareMap = new HashMap<String, Object>();
                logCompareMap.put("a","443b6ea6bc117c");
                logCompareMap.put("b","4");
                logCompareMap.put("c","/publicLog/appAttack");
                logCompareMap.put("d","aaaa");
                Boolean eventFlag = (Boolean) expressionBean.execute(logCompareMap);
                System.out.println("eventFlag = " + eventFlag);
                long end = System.currentTimeMillis();
                System.out.println("end = " + (end-start));
            }
    
    
        }
    
        public static JSONObject strToMap(String valueListStr) {
            JSONObject returnJson = new JSONObject();
            if (valueListStr.startsWith("(") && valueListStr.endsWith(")")) {
                String valueListStrSub = valueListStr.substring(1);
                String conditionValueStr = valueListStrSub.substring(0, valueListStrSub.length() - 1)
                        .replaceAll("&&", "\001")
                        .replaceAll("\\|\\|", "\001")
                        .replaceAll("'", "");
    
    
                String[] keyValueList = conditionValueStr.split("\001");
                try {
                    for (String keyValueStr : keyValueList) {
    
                        //这里只需要将数组里面包含 '=='的数据带入接口方法
                        if (keyValueStr.contains("==")) {
                            String[] keyValues = keyValueStr.split("==");
                            if (keyValues.length > 1) {
                                returnJson.put(keyValues[0], keyValues[1]);
                            } else {
                                returnJson.put(keyValues[0], "");
                            }
    
                        }
                    }
                } catch (Exception ex) {
                   ex.printStackTrace();
                }
    
            }
    
    
            return returnJson;
        }
    
    }

3，运行结果：

> ========> false  
> foo.i = 100  
> foo.f = 3.14  
> foo.date.year = 2110  
> eventFlag = true  
> end = 0

[http_www.jsontest.cn]: http://www.jsontest.cn/
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMxODY2Nzkz_size_16_color_FFFFFF_t_70]: /images/20221120/ed637d80f6b94eae826946feb425d389.png