不错，资瓷

```
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.Field;

public class Reflect {

@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface FruitName {
String value() default "";
}

public static class Apple {
@FruitName("apple")
public String name;
}

public static void main(String... args) throws Exception {
Apple apple = new Apple();
Class clz = apple.getClass();
Field[] fields = clz.getDeclaredFields();
for (Field field : fields) {
if (field.isAnnotationPresent(FruitName.class)) {
field.set(apple, field.getAnnotation(FruitName.class).value());
}
}
System.out.println(apple.name);
}

}

```

http://tutorials.jenkov.com/java-reflection/annotations.html
https://keyholesoftware.com/2014/09/15/java-annotations-using-reflection/
http://www.journaldev.com/1789/java-reflection-example-tutorial
https://docs.oracle.com/javase/tutorial/reflect/member/fieldValues.html

要配合反射注值吧

实习半年的要吗？

女鬼？

推广适度+1

@geelawd

@brq417059 上星期一直这样，过段时间就好了

代金券

黄翠花

青岛的也炸了

赞一个，今天还想着 SQL 语句出问题要是能看到完整 SQL 语句就好啦

差评

star 一枚

@param 蛤蛤

流口水.jpg