JAVA與groovy指令碼的結合使用
java執行groovy shell指令碼
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-all</artifactId>
<version>2.4.0-beta-1</version>
</dependency>
新增groovy jar包支援
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package groovy; import groovy.lang.Binding; import groovy.lang.GroovyShell; public class Java2GroovyShell { public static void main(String[] args) { // TODO Auto-generated method stub Binding binding = new Binding(); binding.setVariable("var", 5); GroovyShell gs = new GroovyShell(binding); Object value = gs.evaluate("println 'Hello Groovy !';abc=123;return var*10");//執行groovyshell指令碼 System.out.println(value.equals(50)); System.out.println(binding.getVariable("abc").equals(123)); } } |
++++++++++++++++++++++++++++++++++++++++++++++++++++JAVA中動態執行groovy指令碼
通過JAVA來載入如一個groovy指令碼檔案，然後呼叫該指令碼中的方法
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package groovy; import groovy.lang.GroovyClassLoader; import groovy.lang.GroovyObject; import java.io.File; public class Java2GroovyDynamic { public static void main(String[] args) throws Exception { // TODO Auto-generated method stub ClassLoader parent = ClassLoader.getSystemClassLoader(); GroovyClassLoader loader = new GroovyClassLoader(parent); Class groovyClass = loader.parseClass(new File("C:\\normandy_workspace\\groovy\\src\\groovy\\GroovyDemo.groovy")); GroovyObject groovyObject = (GroovyObject)groovyClass.newInstance(); Object[] param = {123,321}; int res = (int) groovyObject.invokeMethod("add", param); System.out.println("res="+res); } } |
groovy指令碼
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package groovy class GroovyDemo { static int add(int x,int y) { return x+y; } static main(args) { int z = add(123,321); println("x+y="+z); } } |
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Groovy指令碼引擎
通過設定CLASSPATH來初始化groovy指令碼引擎，可以執行該path下的任何groovy指令碼檔案了
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package groovy; import groovy.lang.Binding; import groovy.util.GroovyScriptEngine; public class Java2GroovyEngine { public static void main(String[] args) throws Exception { // TODO Auto-generated method stub String path = "C:\\normandy_workspace\\groovy\\src\\groovy\\"; GroovyScriptEngine gse = new GroovyScriptEngine(path); Binding binding = new Binding(); binding.setVariable("input", "Groovy"); gse.run("Test.groovy", binding); System.out.println(binding.getVariable("output")); } } |
groovy指令碼
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package groovy; output = "Hello ${input}"; |