第一种方法
调用处
public String invokeMethod(Map<String, String> params) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
ApplicationContext applicationContext = ApplicationContextHolder.getApplicationContext();
Class<?> aClass = applicationContext.getBean("UserService").getClass();
Method method = aClass.getDeclaredMethod("selectUser", String.class);
Map<String, String> data = new HashMap<String, String>();
data.put("listId", "123");
CommonResult result = (CommonResult) method.invoke(applicationContext.getBean("UserService"),"吕茹花");
log.info(result.toString());
return "aa";
}
ApplicationContextHolder.java
package com.baidu.aduhdmap.platform.common;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Service;
@Service("applicationContextProvider")
public class ApplicationContextHolder implements ApplicationContextAware {
private static ApplicationContext appContext;
/**
*
* @param ctx
* @throws BeansException
*/
@Override
public void setApplicationContext(ApplicationContext ctx) throws BeansException {
ApplicationContextHolder.appContext = ctx;
}
/**
*
* @return
*/
public static ApplicationContext getApplicationContext() {
return appContext;
}
}
第二种 动态代理
调用处
public class UserProxyTest {
@Test
public void test() {
IUserDao target = new UserDao();
System.out.println("目标对象信息：" + target.getClass());
//获取代理类实例对象
IUserDao proxy = (IUserDao) new UserProxy(target).getProxyInstance();
System.out.println("代理对象信息：" + proxy.getClass());
//执行代理方法
proxy.insert();
}
}
UserProxy.java
package com.baidu.aduhdmap.platform.common;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
public class UserProxy {
private Object target; //目标对象
public UserProxy(Object target) {
this.target = target;
}
/** * 利用JDK API获取到代理对象 * @return */
public Object getProxyInstance() {
//目标对象的加载器
ClassLoader loader = target.getClass().getClassLoader();
//目标对象的实现接口类型
Class<?>[] interfaces = target.getClass().getInterfaces();
//InnvocationHandler事件处理器实例对象
InvocationHandler h = new InvocationHandler() {
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
System.out.println("添加数据前：手动开启事务");
// 执行目标对象方法
Object value = method.invoke(target, args);
System.out.println("添加数据后：手动提交事务");
return null;
}
};
//传入3个参数，创建代理类的实例对象，并返回
return Proxy.newProxyInstance(loader, interfaces,h);
}
}
