使用javascript让项目支持热插拔 原

package com.voole.p2pauth.util.js.service;

import java.util.Map;

public interface IJSEngine {

	
	String getStringReturn(String jsFile, String functionname);

	
	String getStringReturn(String jsFile, String functionname, Object... args);

	String getStringReturnByRealPath(String jsFile, String functionname);

	
	String getStringReturnByRealPath(String jsFile, String functionname, Object... args);

	
	Boolean addGlobleJavaObj(Map<String, Object> globleJavaObjMap);
}

package com.voole.p2pauth.util.js.center;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;

import javax.script.Invocable;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

import org.apache.log4j.Logger;

import com.voole.p2pauth.util.js.service.IJSEngine;

public class JSEngineImpl implements IJSEngine {
	private static final Logger LOGGER = Logger.getLogger(JSEngineImpl.class);
	private static final ScriptEngineManager manager = new ScriptEngineManager();
	private static final ScriptEngine engine = manager.getEngineByName("javascript");
	private Map<String, Object> globleJavaObj = new HashMap<>();

	private boolean evalJSByClassPathFile(String jsfileName) {
		try {
			ClassLoader classLoader = JSEngineImpl.class.getClassLoader();
			InputStream reader = classLoader.getResourceAsStream("rule/" + jsfileName + ".js");
			if (null == reader) {
				return false;
			}
			if (null != this.globleJavaObj && this.globleJavaObj.size() > 0) {
				for (Entry<String, Object> obj : this.globleJavaObj.entrySet()) {
					engine.put(obj.getKey(), obj.getValue());
				}
			}
			engine.eval(new BufferedReader(new InputStreamReader(reader)));
			return true;
		} catch (ScriptException e) {
			LOGGER.error(e.getMessage(), e);
			// e.printStackTrace();
			return false;
		}
	}

	private boolean evalJSByRealPathFile(String jsfileName) {
		try {
			if (null != this.globleJavaObj && this.globleJavaObj.size() > 0) {
				for (Entry<String, Object> obj : this.globleJavaObj.entrySet()) {
					engine.put(obj.getKey(), obj.getValue());
				}
			}
			engine.eval(new BufferedReader(new FileReader(jsfileName)));
			return true;
		} catch (ScriptException | FileNotFoundException e) {
			LOGGER.error(e.getMessage(), e);
			// e.printStackTrace();
			return false;
		}
	}

	@Override
	public String getStringReturn(String jsFile, String functionname) {
		if (this.evalJSByClassPathFile(jsFile)) {
			if (engine instanceof Invocable) {
				return this.invoke(functionname);
			}
		}
		return null;
	}

	
	@Override
	public String getStringReturn(String jsFile, String functionname, Object... args) {
		if (this.evalJSByClassPathFile(jsFile)) {
			if (engine instanceof Invocable) {
				return this.invoke(functionname, args);
			}
		}
		return null;
	}

	@Override
	public String getStringReturnByRealPath(String jsFile, String functionname) {
		if (this.evalJSByRealPathFile(jsFile)) {
			if (engine instanceof Invocable) {
				return this.invoke(functionname);
			}
		}
		return null;
	}

	@Override
	public String getStringReturnByRealPath(String jsFile, String functionname, Object... args) {
		if (this.evalJSByRealPathFile(jsFile)) {
			if (engine instanceof Invocable) {
				return this.invoke(functionname, args);
			}
		}
		return null;
	}

	private <T> T invoke(String funcname, Object... args) {
		Invocable invocable = (Invocable) engine;
		try {
			return (T) invocable.invokeFunction(funcname, args);
		} catch (NoSuchMethodException | ScriptException e) {
			LOGGER.error(e.getMessage(), e);
			// e.printStackTrace();
			return null;
		}
	}

	
	@Override
	public Boolean addGlobleJavaObj(Map<String, Object> globleJavaObjMap) {
		this.globleJavaObj = globleJavaObjMap;
		return true;
	}

}

public static void main(String[] args) {
	IJSEngine ENGINE = SccUtilFactory.instanceJSEngine();
	// 设置js全局变量
	Map<String, Object> globleJavaObj = getGlobleObj();
	ENGINE.addGlobleJavaObj(globleJavaObj);
	// 执行js规则解析，并返回解析后的playurl
	String play_url = ENGINE.getStringReturn(test.jd,……);
}

function auth_validate_1_0(data){
	LOGGER.info("data:"+data);
	var jdata=eval('(' + data + ')');
	var urlObj=eval('(' + JsUtil.urlToObject(jdata.url) + ')');
	
}