用ScriptEngine在java中和javascript交互的例子(JDK6新特性)
2013-10-30 14:31
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package demo7; import java.util.Arrays; import java.util.List; import javax.script.Invocable; import javax.script.ScriptEngine; import javax.script.ScriptEngineManager; public class ScriptEngineTest { public static void main(String[] args) throws Exception { ScriptEngineManager sem = new ScriptEngineManager(); ScriptEngine engine = sem.getEngineByName("javascript"); // 1 engine.put("msg", "just a test"); String str = "msg += '!!!';var user = {name:'tom',age:23,hobbies:['football','basketball']}; var name = user.name; var hb = user.hobbies[1];"; engine.eval(str); String msg = (String) engine.get("msg"); String name = (String) engine.get("name"); String hb = (String) engine.get("hb"); System.out.println(msg); System.out.println(name + ":" + hb); // 2 engine.eval("function add (a, b) {c = a + b; return c; }"); Invocable jsInvoke = (Invocable) engine; Object result1 = jsInvoke.invokeFunction("add", new Object[] { 10, 5 }); System.out.println(result1); // 3 Adder adder = jsInvoke.getInterface(Adder.class); int result2 = adder.add(10, 35); System.out.println(result2); // 4 engine.eval("function run() {print('www.java2s.com');}"); Invocable invokeEngine = (Invocable) engine; Runnable runner = invokeEngine.getInterface(Runnable.class); Thread t = new Thread(runner); t.start(); t.join(); // 5 String jsCode = "importPackage(java.util);var list2 = Arrays.asList(['A', 'B', 'C']); "; engine.eval(jsCode); List<String> list2 = (List<String>) engine.get("list2"); for (String val : list2) { System.out.println(val); } } } interface Adder { int add(int a, int b); }
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