我正在尝试动态生成一些类,以下是我的初步尝试:
ClassPool cp = ClassPool.getDefault();
cp.insertClassPath(new ClassClassPath(Main.class));
CtClass entity = cp.makeClass("Entity");
try {
CtField id = new CtField(CtClass.intType, "id", entity);
entity.addField(id);
entity.addField(CtField.make(" public String name;", entity));
entity.addMethod(CtNewMethod.make("public void say() { System.out.println(12222);}",entity));
Class EntityClass = entity.toClass();
entity.writeFile("/tmp");
Object e= EntityClass.newInstance();
Field name = EntityClass.getField("name");
name.set("Ooldooz", e);
System.out.println(name.get(e));
} catch (CannotCompileException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
但我面临一个类加载器问题:
线程“主”java.lang.IllegalArgumentException 中的异常:无法在 sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:146) 处将 java.lang.String 字段 Entity.name 设置为 java.lang.String。 UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:150) 在 sun.reflect.UnsafeFieldAccessorImpl.ensureObj(UnsafeFieldAccessorImpl.java:37) 在 sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnsafeObjectFieldAccessorImpl.java:57) 在 java.lang.reflect.Field.set (Field.java:657) 在 Main.test(Main.java:26)
关于如何解决这个问题的任何想法?