spring学习——注入静态对象属性

Posted 2020-09-05

  spring注入静态对象属性时，因为虚拟机类加载问题，直接在属性上使用@Autowired 是不可以的。需要在属性对应的set方法上@Autowired，并且，set方法不能定义为static。

1.创建静态对象属性对应的类

package com.bluej.springj.service.impl;

import org.springframework.stereotype.Service;

import com.bluej.springj.service.LogService;

@Service("logService")
public class LogServiceImpl implements LogService {

    public void doLog() {
        System.out.println("LogServiceImpl.doLog");

    }

}

LogService类代码

2.创建spring使用的对象

 1 package com.bluej.springj.service.impl;
 2 
 3 import org.springframework.beans.factory.annotation.Autowired;
 4 import org.springframework.stereotype.Service;
 5 
 6 import com.bluej.springj.service.CheckService;
 7 import com.bluej.springj.service.LogService;
 8 
 9 @Service("checkService")
10 public class CheckServiceImpl implements CheckService {
11     
12     private static LogService logService;
13 
14     public boolean doCheck(Object obj) {
15         System.out.println("CheckServiceImpl.doCheck");
16         logService.doLog();
17         return false;
18     }
19 
20     @Autowired
21     public  void setLogService(LogService logService) {
22         CheckServiceImpl.logService = logService;
23     }
24 }

CheckServiceImpl 类

3.调用示例

 1 package com.bluej.springj.start;
 2 
 3 import org.springframework.context.ApplicationContext;
 4 import org.springframework.context.support.ClassPathXmlApplicationContext;
 5 
 6 import com.bluej.springj.service.CheckService;
 7 
 8 public class Main {
 9     public static void main(String[] args) {
10         ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
11         CheckService checkService = applicationContext.getBean("checkService", CheckService.class);
12         checkService.doCheck(new Object());
13     }
14 }

Main类

4.代码地址

git地址：https://git.oschina.net/blue_phantom/ssmj.git

项目名称：springj

包位置：package com.bluej.springj.start

执行测试类：Main.java