本文介绍了如何为标有自定义注释的属性调用 getter/setter?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
限时送ChatGPT账号..我目前正在创建用于解析 Excel 文件的自定义编组工具.我想知道如何首先找到带有自定义注释的所有属性(这需要考虑继承,所以不仅仅是 getDeclaredFields),然后根据我使用的方法调用相应的 getter 或 setter.现在,我只关注二传手.
I am currently creating a custom marshalling tool for parsing an excel file. I would like to know how I can first find all properties with a custom annotation (this needs to take inheritance into account, so more than getDeclaredFields), then based on what method I am using call the corresponding getter or setter. Right now, I am just focusing on the setter.
当前代码:
private <T> T findAnnotations(Class<T> clazz)
{
T obj = null;
Annotation[] annotations = clazz.getAnnotations();
for(Annotation annotation : annotations)
{
if(annotation.annotationType() == ExcelColumn.class)
{
if(obj == null)
{
try {
obj = clazz.newInstance();
} catch (IllegalAccessException | InstantiationException e) {
}
}
//annotation found
//call setter of property
//using ChildTest sample class call setname and set parent name
//with string previously parsed.
// i.e obj.setName("") and obj.setParentName("")
}
}
return obj;
}
示例类:
public class ChildTest extends Parent{
@ExcelColumn
private String name;
public void setName(String name) {
this.name = name;
}
}
public class Parent{
@ExcelColumn
private String parentName;
public void setParentName(String parentName) {
this.parentName= parentName;
}
}
推荐答案
您可以使用反射来调用这些方法.
You can use reflection to invoke those methods.
obj.getClass().getMethod("setName", String.class).invoke(obj, "Name");
obj.getClass().getMethod("setParentName", String.class).invoke(obj, "Parent name");
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