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问题：

java使用main方法作为入口，测试service时，发现使用

@Autowired

注入，总是报

java.lang.NullPointerException

异常

原因：

new出来的thread不在spring的容器中，所以无法注入成功，获得bean

解决：

ApplicationContext  springUtilContext = new ClassPathXmlApplicationContext(“classpath:applicationContext.xml”);

PaymentService paymentService=(PaymentService) springUtilContext.getBean(

PaymentService.class

);

代码如下：

package com.upincar.xigua.payment.controller;

import java.util.HashMap;
import java.util.Map;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.upincar.xigua.customer.entity.CustomerInfo;
import com.upincar.xigua.payment.service.PaymentService;

import net.sf.json.JSONObject;

public class Test {
	ApplicationContext  springUtilContext = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
			
	public static void main(String[] args) {
		new Test().test();
	}
	
	public void test(){
		Map<String, String> paramMap=new HashMap<>();
		try {
			paramMap.put("token", "974729c60f5c4c3085390db9bb15b83c");
			paramMap.put("paymentType", "XCX-2");
			paramMap.put("sumPrice", "1");
			paramMap.put("openid", "okHCp5TURl7KcgoeUIe1-BOfkSBo");
			CustomerInfo customerInfo=new CustomerInfo();
			customerInfo.setId(1);
			customerInfo.setAccount("17521010129");
			customerInfo.setName("zora");
			PaymentService paymentService=(PaymentService) springUtilContext.getBean(PaymentService.class);
			JSONObject result =  paymentService.balancePay(customerInfo, paramMap);
			System.out.println(result);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}