如何用JavaPoet重新创建一个类？

implementation 'com.squareup:javapoet:1.13.0'

String packageName = "com.example";
String className = "MyClass";

JavaFile javaFile = JavaFile.builder(packageName, TypeSpec.classBuilder(className)
        .build())
        .build();

FieldSpec fieldSpec = FieldSpec.builder(String.class, "name")
        .addModifiers(Modifier.PRIVATE)
        .build();

MethodSpec methodSpec = MethodSpec.methodBuilder("getName")
        .addModifiers(Modifier.PUBLIC)
        .returns(String.class)
        .addStatement("return name")
        .build();

TypeSpec typeSpec = TypeSpec.classBuilder(className)
        .addField(fieldSpec)
        .addMethod(methodSpec)
        .build();

JavaFile javaFile = JavaFile.builder(packageName, typeSpec)
        .build();

File outputDir = new File("path/to/output");
javaFile.writeTo(outputDir);