java笔记_6_根据路径创建类Bean

Object obj = SpringContextUtil.getBean(clazz);

例子

ProcessFactoryBean processFactoryBean=(ProcessFactoryBean)SpringContextUtil.getBean("&ProcessFactoryBean");

IOrdDealService serviceBean = null;
String parseClass=busiPageForm.getParserClass();
if(StringUtils.hasText(parseClass)){
    Class<?> clazz = Class.forName ( parseClass);
    serviceBean = (IOrdDealService)SpringContextUtil.getBean(clazz);
}else {
    serviceBean = (IOrdDealService) processFactoryBean.getObject();
}

ProcessFactoryBean 

import process.IOrdDealService;//自定义类
import lombok.Data;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.stereotype.Component;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

@Data
@Component
public class ProcessFactoryBean implements FactoryBean {

    private String PARSE_CLASS="process.impl.OrdDealSrvImpl";


    /**
     * 自定义bean的创建过程
     */
    @Override
    public Object getObject() throws Exception {
        System.out.println("-----调用ProcessFactoryBean.getObject----");
        // 1、直接new
        //IOrdDealService orderService = new OrdDealServiceImpl();
        //return orderService;

        // 2、通过动态代理，无需实现类，如 Mybatis的xxxMapper接口
        Class servicedealClass = Class.forName(PARSE_CLASS);
        IOrdDealService serviceImpl=(IOrdDealService)servicedealClass.newInstance();
        IOrdDealService bean = (IOrdDealService) Proxy.newProxyInstance(ProcessFactoryBean.class.getClassLoader(), new Class[]{IOrdDealService.class}, new InvocationHandler() {
            @Override
            public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                // todo
                System.out.println(method.getName());
                return method.invoke(serviceImpl,args);
            }
        });
        return bean;
    }
}