java - method.invoke - java.lang.RuntimeException : java. lang.IllegalArgumentException:对象不是声明类的实例

Question

有什么想法吗？

尝试调用对象时出现错误。

R java.lang.RuntimeException: java.lang.IllegalArgumentException: object is not an instance of declaring class

 Caused by: java.lang.IllegalArgumentException: object is not an instance of declaring class
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java(Compiled Code))
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java(Compiled Code))
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java(Compiled Code))
at java.lang.reflect.Method.invoke(Method.java(Compiled Code))
at com.test.corp.name.workflow.changetracking.changeimpl.FieldValueChange.apply(FieldValueChange.java:171)

 public void apply(DomainContext context) {
    try {
        final Class entityClazz = Class.forName(entityClass);
        Object entity = context.getEntity( entityClazz, primaryKey);
        Object entityChange = context.getChangeEntity(entityClazz, primaryKey);
        Method setter = getSetterMethod(entityClazz,fieldName);

        if(entity!=null)
            setter.invoke(entity, new Object[]{getValue()}); //this line 171
        if(entityChange!=null)
            setter.invoke(entityChange, new Object[]{getValue()});

    }catch(Exception e) {
        throw new RuntimeException(e);
    }
}

我认为这已经足够了，但仍然有错误，有人吗？

Answer 1

它说的是entity不属于 entityClazz 类。当您通过反射调用 setter.invoke 时当然，它期望该类的对象。

尝试输出entity.getClass()和entityClazz看看它们是否相同或至少 entityClazz是 entity.getClass() 的父级.