function scriptFunction(obj){
 var a = 1;
 var b = 2;
 return obj.sum(a,b);
}
scriptFunction(obj);//調(diào)用該方法

public class ScirptContainer {
 
 
 public static ScriptEngine engine;//腳本引擎
 
 static {
 ScriptEngineManager manager = new ScriptEngineManager();//腳本引擎管理
 engine = manager.getEngineByName("nashorn");//獲取nashorn腳本引擎
 engine.getContext().getWriter();//獲取正文并且寫(xiě)入
 }
 
 private ConcurrentHashMap<Integer, CompiledScript> scripts = new ConcurrentHashMap<>();//腳本存儲(chǔ)容器
 
 
 public CompiledScript getCompiledScript(String script) throws ScriptException{
 //判斷腳本是否為空
 if(script == null || "".equals(script)){
 throw new ScriptException("JavaScript empty");
 }
 //獲取腳本Hash
 int hashCode = script.hashCode();
 //從容器中獲取腳本
 CompiledScript compiledScript = scripts.get(hashCode);
 if(compiledScript == null){
 //容器中無(wú)腳本創(chuàng)建腳本對(duì)象
 Compilable compilable = (Compilable) engine;
 //編譯JavaScript腳本
 compiledScript = compilable.compile(script);
 //腳本對(duì)象存入容器中
 scripts.put(hashCode, compiledScript);
 }
 return compiledScript;
 } 
}

public class ScriptHandler {
 
 //創(chuàng)建容器對(duì)象
 private ScirptContainer scirptContainer = new ScirptContainer();
 
 //需要執(zhí)行的對(duì)象
 String js1 = "function scriptFunction(obj){ var a = 1; var b = 2; return obj.sum(a,b); } scriptFunction(obj);";
 
 @Test
 public void test() throws ScriptException{
 //獲取腳本對(duì)象
 CompiledScript c1 = scirptContainer.getCompiledScript(js1);
 //創(chuàng)建參數(shù)綁定
 Bindings bindings = scirptContainer.engine.createBindings();
 //obj參數(shù)綁定SumTest類(lèi)
 bindings.put("obj", new SumTest());
 //執(zhí)行JavaScript腳本并且打印返回值
 System.out.println(c1.eval(bindings));
 }
}