一个网站做两个优化可以做吗,做办公设备网站,开源企业建站系统哪个好,北苑做网站的公司Java语言特性系列 序 本文梳理了下java6的新特性#xff0c;相对于java5而言#xff0c;java6的特性显得少些#xff0c;分量也不那么重#xff0c;相当于java5是windows xp#xff0c;java6有点像vista。 特性列表JSR223脚本引擎 JSR199--Java Compiler API JSR269--Plug… Java语言特性系列 序 本文梳理了下java6的新特性相对于java5而言java6的特性显得少些分量也不那么重相当于java5是windows xpjava6有点像vista。 特性列表JSR223脚本引擎 JSR199--Java Compiler API JSR269--Pluggable Annotation Processing API 支持JDBC4.0规范 JAX-WS 2.0规范 1、JSR223脚本引擎 Scripting for the Java Platform基本使用public class BasicScripting { public void greet() throws ScriptException { ScriptEngineManager manager new ScriptEngineManager(); //支持通过名称、文件扩展名、MIMEtype查找 ScriptEngine engine manager.getEngineByName(JavaScript); // engine manager.getEngineByExtension(js); // engine manager.getEngineByMimeType(text/javascript); if (engine null) { throw new RuntimeException(找不到JavaScript语言执行引擎。); } engine.eval(println(Hello!);); } public static void main(String[] args) { try { new BasicScripting().greet(); } catch (ScriptException ex) { Logger.getLogger(BasicScripting.class.getName()).log(Level.SEVERE, null, ex); } } }绑定上下文public class ScriptContextBindings extends JsScriptRunner { public void scriptContextBindings() throws ScriptException { ScriptEngine engine getJavaScriptEngine(); ScriptContext context engine.getContext(); Bindings bindings1 engine.createBindings(); bindings1.put(name, Alex); context.setBindings(bindings1, ScriptContext.GLOBAL_SCOPE); Bindings bindings2 engine.createBindings(); bindings2.put(name, Bob); context.setBindings(bindings2, ScriptContext.ENGINE_SCOPE); engine.eval(println(name);); } public void useScriptContextValues() throws ScriptException { ScriptEngine engine getJavaScriptEngine(); ScriptContext context engine.getContext(); Bindings bindings context.getBindings(ScriptContext.ENGINE_SCOPE); bindings.put(name, Alex); engine.eval(println(name);); } public void attributeInBindings() throws ScriptException { ScriptEngine engine getJavaScriptEngine(); ScriptContext context engine.getContext(); context.setAttribute(name, Alex, ScriptContext.GLOBAL_SCOPE); engine.eval(println(name);); } /** * param args the command line arguments */ public static void main(String[] args) throws ScriptException { ScriptContextBindings scb new ScriptContextBindings(); scb.scriptContextBindings(); scb.useScriptContextValues(); scb.attributeInBindings(); } } 2、JSR199--Java Compiler APIpublic class JavaCompilerAPICompiler { public void compile(Path src, Path output) throws IOException { JavaCompiler compiler ToolProvider.getSystemJavaCompiler(); try (StandardJavaFileManager fileManager compiler.getStandardFileManager(null, null, null)) { Iterable extends JavaFileObject compilationUnits fileManager.getJavaFileObjects(src.toFile()); Iterable options Arrays.asList(-d, output.toString()); JavaCompiler.CompilationTask task compiler.getTask(null, fileManager, null, options, null, compilationUnits); boolean result task.call(); } } } 3、JSR269--Pluggable Annotation Processing API 一部分是进行注解处理的javax.annotation.processing另一部分是对程序的静态结构进行建模的javax.lang.model 4、其他支持JDBC4.0规范 JAX-WS 2.0规范(包括JAXB 2.0) 轻量级HttpServer 参考
