java实现字符串转换成可执行代码

使用commons的jexl可实现将字符串变成可执行代码的功能，我写了一个类来封装这个功能：

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);}}

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调用方式：

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);

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