前言
注解在后端开发过程中提供了许多的便利,提高了代码简洁性和可读性,在应用程序中占据越来越重要的作用,很有学习的必要,接下来会通过代码来完成对类、方法、属性注解的解析。文章来源:https://www.toymoban.com/news/detail-593263.html
一、代码部分
package test;
import com.student.SpringbootStart;
import com.student.controller.StudentCurriculumController;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Map;
/**
* Create by zjg on 2023/7/16
*/
@RunWith(SpringRunner.class)
@SpringBootTest(classes = SpringbootStart.class, webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
public class AnnotationTest {
@Autowired
private ConfigurableApplicationContext applicationContext;
@Autowired
private StudentCurriculumController studentCurriculumController;
@Test
public void main() throws NoSuchMethodException {
//模拟RequestMapping路径的拼接
//todo class
Map<String, Object> annotations = applicationContext.getBeansWithAnnotation(RequestMapping.class);
annotations.forEach((k,v)->{
System.out.println(String.format("服务{%s}可访问服务列表如下:",k));
RequestMapping requestMapping = applicationContext.findAnnotationOnBean(k, RequestMapping.class);
String prefix="";
if(requestMapping!=null){
prefix=requestMapping.value()[0];
}
//todo method
Method[] methods;
if(v.getClass().getName().contains("$$")){//处理代理类
methods= v.getClass().getSuperclass().getDeclaredMethods();
}else{
methods = v.getClass().getDeclaredMethods();
}
for(Method method:methods){
RequestMapping requestMapping1 = method.getAnnotation(RequestMapping.class);
String suffix="";;
if(requestMapping1!=null){
suffix=requestMapping1.value().length==0?"":requestMapping1.value()[0];
}
PostMapping postMapping = method.getAnnotation(PostMapping.class);
if(postMapping!=null){
suffix=postMapping.value()[0];
}
GetMapping getMapping = method.getAnnotation(GetMapping.class);
if(getMapping!=null){
suffix=getMapping.value()[0];
}
if(!(prefix.endsWith("/"))&&!(suffix.startsWith("/"))){//此处是因为编码不规范,emo
suffix="/"+suffix;
}
System.out.println(prefix+suffix);
}
//todo field
Field[] declaredFields;
if(v.getClass().getName().contains("$$")){//处理代理类
declaredFields= v.getClass().getSuperclass().getDeclaredFields();
}else{
declaredFields= v.getClass().getDeclaredFields();
}
for (Field declaredField : declaredFields) {
Autowired autowired = declaredField.getAnnotation(Autowired.class);
if(autowired!=null){
boolean required = autowired.required();
System.out.println(declaredField.getName()+".required="+required);
}
}
});
}
}
总结
回到顶部
代理类会使我们获取注解失败,要做特殊处理。文章来源地址https://www.toymoban.com/news/detail-593263.html
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