How to use Compiler API in JDK6.0
This article will explain in detail how to use Compiler API in JDK6.0. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.
Public class CompilerAPITester {private static String JAVA_SOURCE_FILE = "DynamicObject.java"; private static String JAVA_CLASS_FILE = "DynamicObject.class"; private static String JAVA_CLASS_NAME = "DynamicObject"; public static void main (String [] args) {JavaCompiler compiler = ToolProvider.getSystemJavaCompiler (); StandardJavaFileManager fileManager = compiler.getStandardFileManager (null, null, null); generateJavaClass () Try {/ / copies the generated class files to the program's ClassPath. The following line of code is specific to the Windows+IntelliJ IDEA 6.0project and does not have portability Runtime.getRuntime () .exec ("cmd / c copy" + JAVA_CLASS_FILE+ "classesproductionJDK6Features"); Iterable sourcefiles = fileManager.getJavaFileObjects (JAVA_SOURCE_FILE); compiler.getTask (null, fileManager, null, sourcefiles) .call () FileManager.close (); Class.forName (JAVA_CLASS_NAME). NewInstance (); / / create an instance of the dynamically compiled DynamicObject class} catch (Exception ex) {ex.printStackTrace ();}} public static void generateJavaClass () {try {FileWriter fw = new FileWriter (JAVA_SOURCE_FILE); BufferedWriter bw = new BufferedWriter (fw) Bw.write ("public class" + JAVA_CLASS_NAME+ "{"); bw.newLine (); bw.write ("public" + JAVA_CLASS_NAME+ "() {System.out.println (" In the constructor of DynamicObject ");}}"); bw.flush (); bw.close ();} catch (IOException ex) {ex.printStackTrace ();}
After the program is run, two files, DynamicObject.java and DynamicObject.class, will be generated and output in the console.
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