Ioc配置——读取properties文件信息

 

import com.hw.dao.UserDao;
import com.hw.service.UserService;

public class UserServiceImpl implements UserService {

    private UserDao userDao;
    private String username;
    private String password;

    public void setUserDao(UserDao userDao) {
        this.userDao = userDao;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public void save() {
        System.out.println("userServiceImpl save runing..." + username + "" + password);
        userDao.save();
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:p="http://www.springframework.org/schema/p"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd">

    <!--1、开启context命名空间-->
    <!--xmlns:context="http://www.springframework.org/schema/context"-->
    <!--http://www.springframework.org/schema/context-->
    <!--https://www.springframework.org/schema/context/spring-beans.xsd-->

    <!--2、加载指定的properties文件-->
    <context:property-placeholder location="classpath:data.properties" />

    <bean id="userDao" class="com.hw.dao.impl.UserDaoImpl"/>

    <bean id="userService" class="com.hw.service.impl.UserServiceImpl">
        <property name="userDao" ref="userDao"/>
        <property name="username" value="${usernames}"/>
        <property name="password" value="${pwd}"/>
    </bean>
</beans>

data.properties：

usernames=root

pwd=123456