JDK的Parser来解析Java源代码详解

public class JavaParser {

 private static final String path = "" ;

 private JavacFileManager fileManager;
 private JavacTool javacTool;

 public JavaParser() {
  Context context = new Context();
  fileManager = new JavacFileManager(context, true , ());
  javacTool = new JavacTool();
 }

 public void parseJavaFiles() {
  Iterable<!--? extends JavaFileObject--> files = (path);
  compilationTask = ( null , fileManager, null , null , null , files);
  JavacTask javacTask = (JavacTask) compilationTask;
  try {
   Iterable<!--? extends CompilationUnitTree--> result = ();
   for (CompilationUnitTree tree : result) {
    ( new SourceVisitor(), null );

   }
  } catch (IOException e) {
   ();
  }
 }

 static class SourceVisitor extends TreeScanner< void , void = "" > {

  private String currentPackageName = null ;

  @Override
  public Void visitCompilationUnit(CompilationUnitTree node, Void aVoid) {
   return super .visitCompilationUnit(node, aVoid);
  }

  @Override
  public Void visitVariable(VariableTree node, Void aVoid) {
   formatPtrln( "variable name: %s, type: %s, kind: %s, package: %s" ,
     (), (), (), currentPackageName);
   return null ;
  }
 }

 public static void formatPtrln(String format, Object... args) {
  ((format, args));
 }

 public static void main(String[] args) {

  new JavaParser().parseJavaFiles();
 }
}</ void ,>