1 在java中使用groovy类
1.1 直接调用groovy类
在java中调用Groovy类，需要增加Groovy运行时到java的classpath中。
pom.xml
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<dependency> <groupId>org.codehaus.groovy</groupId> <artifactId>groovy-all</artifactId> <version>2.4.5</version> </dependency> |
创建一个包：de.vogella.groovy.java
创建一个Groovy类。
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package de.vogella.groovy.java import groovy.transform.ToString @ToString() class Person { String firstName String lastName int age def address } |
创建一个java类
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package de.vogella.groovy.java; public class Main { public static void main(String[] args) { Person p = new Person(); p.setFirstName("zuoys"); p.setLastName("遥远2"); System.out.println(p.getFirstName() + " " + p.getLastName()); System.out.println(p.toString()); } } |
输出：
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zuoys 遥远2 de.vogella.groovy.java.Person(zuoys, 遥远2, 0, null) |
1.2 Java调用Groovy脚本
http://www.tuicool.com/articles/baQRVf
JSR223方式
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package de.vogella.groovy.java; import java.util.Date; import javax.script.Bindings; import javax.script.Invocable; import javax.script.ScriptEngine; import javax.script.ScriptEngineManager; public class ExecuteGroovyViaJSR223 { public static void main(String[] args) { ScriptEngineManager factory = new ScriptEngineManager(); // 每次生成一个engine实例 ScriptEngine engine = factory.getEngineByName("groovy"); System.out.println(engine.toString()); assert engine != null; // javax.script.Bindings Bindings binding = engine.createBindings(); binding.put("date", new Date()); // 如果script文本来自文件,请首先获取文件内容 try { engine.eval("def getTime(){return date.getTime();}", binding); engine.eval("def sayHello(name,age){return ‘Hello,I am ‘ + name + ‘,age‘ + age;}"); Long time = (Long) ((Invocable) engine).invokeFunction("getTime", null); System.out.println("执行结果："+time); String message = (String) ((Invocable) engine).invokeFunction("sayHello", "zhangsan", new Integer(12)); System.out.println("执行结果："+message); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } } |
输出
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[email protected] 执行结果：1469518145323 执行结果：Hello,I am zhangsan,age12 |