[英]How to get class level variable declarations using javaparser ?
我只想獲取類級別的變量聲明。 如何使用javaparser獲取聲明?
public class Login {
private Keyword browser;
private String pageTitle = "Login";
}
使用javaparser必須獲取變量“ browser”的詳細信息,例如瀏覽器的類型為“ KeyWord”
不太確定我是否理解您的問題-您想讓班上所有的現場成員嗎? 如果是這樣,您可以這樣做:
CompilationUnit cu = JavaParser.parse(javaFile);
for (TypeDeclaration typeDec : cu.getTypes()) {
List<BodyDeclaration> members = typeDec.getMembers();
if(members != null) {
for (BodyDeclaration member : members) {
//Check just members that are FieldDeclarations
FieldDeclaration field = (FieldDeclaration) member;
//Print the field's class typr
System.out.println(field.getType());
//Print the field's name
System.out.println(field.getVariables().get(0).getId().getName());
//Print the field's init value, if not null
Object initValue = field.getVariables().get(0).getInit();
if(initValue != null) {
System.out.println(field.getVariables().get(0).getInit().toString());
}
}
}
在您的情況下,將顯示以下代碼示例:關鍵字瀏覽器字符串頁面標題“登錄”
我希望這確實是您的問題...如果沒有,請發表評論。
要將以上答案更新為最新版本的JavaParser:
CompilationUnit cu = JavaParser.parse("public class Login {\n" +
"\n" +
" private Keyword browser;\n" +
" private String pageTitle = \"Login\";\n" +
"}\n");
for (TypeDeclaration<?> typeDec : cu.getTypes()) {
for (BodyDeclaration<?> member : typeDec.getMembers()) {
member.toFieldDeclaration().ifPresent(field -> {
for (VariableDeclarator variable : field.getVariables()) {
//Print the field's class typr
System.out.println(variable.getType());
//Print the field's name
System.out.println(variable.getName());
//Print the field's init value, if not null
variable.getInitializer().ifPresent(initValue -> System.out.println(initValue.toString()));
}
});
}
}
而沒有那么麻煩就可以到達字段聲明的方法是...
cu.findAll(FieldDeclaration.class).forEach(field -> {
field.getVariables().forEach(variable -> {
//Print the field's class typr
System.out.println(variable.getType());
//Print the field's name
System.out.println(variable.getName());
//Print the field's init value, if not null
variable.getInitializer().ifPresent(initValue -> System.out.println(initValue.toString()));
});
});
兩者之間的功能差異在於,第一個僅在頂級類中查找,而第二個也將在嵌套類中查找。
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