spring postconstruct

package com.jdw.service.impl;

import java.util.List;

import javax.annotation.PostConstruct;

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

import com.jdw.bean.User;
import com.jdw.dao.UserMapper;
import com.jdw.service.UserService;

@Service("userService")
public class UserServiceImpl implements UserService {

	@Autowired
	// 注入
	private UserMapper userMapper;

	private List<User> users = null;

	public UserServiceImpl() {
		super();

	}

	@PostConstruct
	private void init() {
		System.out.println("start init..");
		users = userMapper.selectList();
		System.out.println("已经初始化users...");
	}

	@Override
	public List<User> getUsers() {
		// TODO Auto-generated method stub
		return users;
	}

}