Spring导入properties配置文件代码示例

Spring导入properties配置文件代码示例

将外部属性文件的数据配置到bean的配置文件，依赖于context标签下的property-placeholder标签

1、准备properties文件

url=jdbc:mysql://localhost:3306/hibernate_db

username=root

password=1111

2、编写对应实体类

package com.yl.bean;

public class DataSource {

private String url;

private String username;

private String password;

public DataSource() {

}

public String getUrl() {

rethttp://urn url;

}

public void setUrl(String url) {

this.url = url;

}

public String getUsername() {

return username;

}

public void setUsername(String username) {

this.username = username;

}

public String getPassword() {

return password;

}

public void setPassword(String password) {

this.password = password;

}

@Override

public String toString() {

return "DataSource{" +

"url='" + url + '\'' +

", username='" + username + '\'' +

", password='" + password + '\'' +

'}';

}

}

3、spring配置文件

xmlns:xsihttp://="http://w3.org/2001/XMLSchemahttp://-instance"

xmlns:context="http://springframework.org/schema/context"

xsi:schemaLocation="http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans.xsd

http://springframework.org/schema/context

http://springframework.org/schema/context/spring-context.xsd">

xmlns:xsihttp://="http://w3.org/2001/XMLSchemahttp://-instance"

xmlns:context="http://springframework.org/schema/context"

xsi:schemaLocation="http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans.xsd

http://springframework.org/schema/context

http://springframework.org/schema/context/spring-context.xsd">

4、测试

package com.yl;

import com.yl.bean.DataSource;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class MainTest {

public static void main(String[] args) {

ApplicationContext applicationContext=new ClassPathXmlApplicationContext("bean1.xml");

DataSource dataSource= (DataSource) applicationContext.getBean("dataSource");

System.out.println(dataSource);

}

}

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