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我做了一個簡單的java項目來測試ByteBuddy。我輸入完全相同的代碼由拉斐爾溫特做了一個教程，但它顯示我加字節好友-1.7.1.jar作爲參考圖書館借了一些錯誤如何在java項目中使用ByteBuddy
1) ByteBuddyAgent cannot be resolved.
2) type cannot be resolved to a variable.
3) builder cannot be resolved.
4) method cannot be resolved to a variable.
。
public class LogAspect {
public static void main(String[] args){
premain("", ByteBuddyAgent.installOnOpenJDK());
Calculator calculator = new Calculator();
int sum = calculator.sum(10, 15, 20);
System.out.println("Sum is "+ sum);
}
public static void premain(String arg, Instrumentation inst){
new AgentBuilder.Default()
.rebase(type -> type.getSimpleName().equals("Calculator"))
.transform((builder, typeDescription) -> builder
.method(method -> method.getDeclaredAnnotations().isAnnotationPresent(Log.class))
.intercept(MethodDelegation.to(LogAspect.class).andThen(SuperMethodCall.INSTANCE)))
.installOn(inst);
}
public static void intercept(@Origin Method method){
System.out.println(method.getName()+" is called.");
}
}
@interface Log{
}
class Calculator {
@Log
public int sum(int... values) {
return Arrays.stream(values).sum();
}
}