spring学习——注入静态对象属性

  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");

    }

}

2.创建spring使用的对象

package com.bluej.springj.service.impl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.bluej.springj.service.CheckService;
import com.bluej.springj.service.LogService;

@Service("checkService")
public class CheckServiceImpl implements CheckService {
    
    private static LogService logService;

    public boolean doCheck(Object obj) {
        System.out.println("CheckServiceImpl.doCheck");
        logService.doLog();
        return false;
    }

    @Autowired
    public  void setLogService(LogService logService) {
        CheckServiceImpl.logService = logService;
    }
}

3.调用示例

package com.bluej.springj.start;

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

import com.bluej.springj.service.CheckService;

public class Main {
    public static void main(String[] args) {
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
        CheckService checkService = applicationContext.getBean("checkService", CheckService.class);
        checkService.doCheck(new Object());
    }
}

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