Apache Commons JEXL实现字符串转换成可执行代码

使用Apache Commons 的JEXL可实现将字符串变成可执行代码的功能，

封装功能类：

import java.util.Map;  
  
import org.apache.commons.jexl2.Expression;  
import org.apache.commons.jexl2.JexlContext;  
import org.apache.commons.jexl2.JexlEngine;  
import org.apache.commons.jexl2.MapContext;  
  
/** 
 * 动态加载方法 
 * @author wangyfc 
 * 
 */  
public class DyMethodUtil {  
      
    public static Object invokeMethod(String jexlExp,Map<String,Object> map){  
        JexlEngine jexl=new JexlEngine();  
        Expression e = jexl.createExpression(jexlExp);  
        JexlContext jc = new MapContext();  
        for(String key:map.keySet()){  
            jc.set(key, map.get(key));  
        }  
        if(null==e.evaluate(jc)){  
            return "";  
        }  
        return e.evaluate(jc);  
    }  
  
}

Map<String,Object> map=new HashMap<String,Object>();  
map.put("testService",testService);  
map.put("person",person);  
String expression="testService.save(person)";  
DyMethodUtil.invokeMethod(expression,map);