直接上代码 com.**.routerdemo 替换成包名
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
public class ReflectionUtils {
public static void invokeInnerStaticClass() {
try {
Class clazz = Class.forName("com.**.routerdemo.Test$InnerStaticClass");
Constructor constructor = clazz.getDeclaredConstructor();
constructor.setAccessible(true);
Object instance = constructor.newInstance();
Method printM = clazz.getDeclaredMethod("print", String.class);
printM.setAccessible(true);
printM.invoke(instance, "I am InnerStaticClass");
Method getNameM = clazz.getDeclaredMethod("getName");
getNameM.setAccessible(true);
System.out.println("cxx getclassname=" + getNameM.invoke(instance));
} catch (Exception e) {
System.out.println("cxx Exception >>" + e.getMessage());
}
}
public static void invokeNormalStaticClass() {
try {
Class outerCls = Class.forName("com.**.routerdemo.Test");
Constructor outerConstructor = outerCls.getDeclaredConstructor();
outerConstructor.setAccessible(true);
Object outerInstance = outerConstructor.newInstance();
//正常内部类实例化 new Test().new InnerNormalClass();
Class clazz = Class.forName("com.**.routerdemo.Test$InnerNormalClass");
Constructor constructor = clazz.getDeclaredConstructor(outerCls);
constructor.setAccessible(true);
Object instance = constructor.newInstance(outerInstance);
Method printM = clazz.getDeclaredMethod("print", String.class);
printM.setAccessible(true);
printM.invoke(instance, "I am InnerStaticClass");
Method getNameM = clazz.getDeclaredMethod("getName");
getNameM.setAccessible(true);
System.out.println("cxx getclassname=" + getNameM.invoke(instance));
} catch (Exception e) {
System.out.println("cxx Exception >>" + e.getMessage());
}
}
public static void invokeMethod() {
try {
Bean bean1 = new Bean();
bean1.setVerCode(1);
Bean bean2 = new Bean();
bean2.setVerCode(1);
Class cls = Class.forName("com.**.routerdemo.Test");
Constructor constructor = cls.getDeclaredConstructor();
Method method = cls.getDeclaredMethod("equal", Bean.class, Bean.class);
method.setAccessible(true);
System.out.println("cxx is equal>>" + method.invoke(constructor.newInstance(), bean1, bean2));
} catch (Exception e) {
System.out.println("cxx e>>>" + e.getMessage());
}
}
public static void invokeAnonymousClass() {
try {
Class clazz = Class.forName("com.**.routerdemo.Test");
Constructor constructor = clazz.getDeclaredConstructor();
constructor.setAccessible(true);
Object outerInstance = constructor.newInstance();
Field field = clazz.getDeclaredField("runnable");
field.setAccessible(true);
Runnable r = (Runnable) field.get(outerInstance);
r.run();
} catch (Exception e) {
e.printStackTrace();
}
}
public static void InvokeInnerClasses() {
try {
Class clazz = Class.forName("com.**.routerdemo.Test");
Object container = clazz.newInstance();
Class innerClazz[] = clazz.getDeclaredClasses();
for (Class cls : innerClazz) {
int mod = cls.getModifiers();
String modifier = Modifier.toString(mod);
if (modifier.contains("static")) {
//构造静态内部类实例
Constructor innerStatic = cls.getDeclaredConstructor();
innerStatic.setAccessible(true);
Method printM = cls.getDeclaredMethod("print", String.class);
printM.setAccessible(true);
printM.invoke(innerStatic.newInstance(), "I am InnerStaticClass");
} else {
Constructor innerNormal = cls.getDeclaredConstructor(clazz);
innerNormal.setAccessible(true);
Method print = cls.getDeclaredMethod("print", String.class);
print.setAccessible(true);
print.invoke(innerNormal.newInstance(container), "I am innerNormal");
}
}
// 获取匿名内部类实例
Field field = clazz.getDeclaredField("runnable");
field.setAccessible(true);
Runnable r = (Runnable) field.get(container);
r.run();
// 获取静态成员变量
Field staticField = clazz.getDeclaredField("paramStatic");
staticField.setAccessible(true);
staticField.setBoolean(container, true);
System.out.println("cxx test staticParam " + Test.paramStatic);
// 获取非静态成员变量
Field normalField = clazz.getDeclaredField("paramNormal");
normalField.setAccessible(true);
normalField.setBoolean(container, true);
System.out.println("cxx test paramNormal " + ((Test) container).paramNormal);
} catch (Exception e) {
System.out.println("cxx Exception >>" + e.getMessage());
}
}
}
被反射的类：
public class Test {
private static class InnerStaticClass {
private void print(String str) {
System.out.println("cxx 静态内部类print带参方法,参数" + str);
}
private String getName() {
return InnerStaticClass.class.getName();
}
}
private class InnerNormalClass {
private void print(String str) {
System.out.println("cxx 非静态内部类print带参方法,参数" + str);
}
private String getName() {
return InnerNormalClass.class.getName();
}
}
private Runnable runnable = new Runnable() {
@Override
public void run() {
System.out.println("cxx 匿名内部类run方法");
}
};
public static boolean paramStatic = false;
public boolean paramNormal = false;
private boolean equal(Bean a, Bean b) {
return a.getVerCode() == b.getVerCode();
}
}