[英]JavaParser how to get classname in CompilationUnit
I have a path to a.java class like "./src/module/car.java" and i parse it like this:我有一条到 a.java class 的路径,例如“./src/module/car.java”,我像这样解析它:
File sourceFileCar = new File("./src/module/car.java");
CompilationUnit cuCar = StaticJavaParser.parse(sourceFileCar);
How can I get the class name in the car.java file without knowing it before (cant use cuCar.getClassByName)如何在之前不知道的情况下获取 car.java 文件中的 class 名称(不能使用 cuCar.getClassByName)
To access the parsed file, you have to create a visitor class which extends the VoidVisitorAdapter class.要访问已解析的文件,您必须创建一个访问者 class,它扩展了 VoidVisitorAdapter class。
public static class ClassNameCollector extends VoidVisitorAdapter<List<String>>{
@Override
public void visit(ClassOrInterfaceDeclaration n, List<String> collector) {
super.visit(n, collector);
collector.add(n.getNameAsString());
}
}
After created a class, you have to override visit() method which job is to visit nodes in parsed file.创建 class 后,您必须重写 visit() 方法,该方法是访问解析文件中的节点。 In this case, we use ClassOrInterfaceDeclaration as a method parameter to get the class name and pass List for collecting the name.在这种情况下,我们使用 ClassOrInterfaceDeclaration 作为方法参数来获取 class 名称,并通过 List 来收集名称。
In the main class, create a visitor object for using visit() which getting compilation object and list as parameters.在主 class 中,创建一个访问者 object 用于使用 visit() 获取编译 object 并作为参数列出。
public static void main(String[] args) throws Exception {
List<String> className = new ArrayList<>();
// Create Compilation.
CompilationUnit cu = StaticJavaParser.parse(new File(FILE_PATH));
// Create Visitor.
VoidVisitor<List<String>> classNameVisitor = new ClassNameCollector();
// Visit.
classNameVisitor.visit(cu,className);
// Print Class's name
className.forEach(n->System.out.println("Class name collected: "+n));
}
The result shows below.结果如下所示。
Class name collected: InvisibleClass
Class name collected: VisibleClass
Class name collected: ReversePolishNotation
Hope this might solves you question:)希望这可以解决你的问题:)
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