//装载单个配置文件实例化ApplicationContext容器
ApplicationContext cxt = new ClassPathXmlApplicationContext
("applicationContext.xml");
//装载多个配置文件实例化ApplicationContext容器
String[] configs = {"bean1.xml","bean2.xml","bean3.xml"};
ApplicationContext cxt = new ClassPathXmlApplicationContext(configs);

package com;

public class DBParaProperty {
 //jdbc sqlserver 驱动类
 String sqlServerDriverClassName;
 //sqlserver 连接地址
 String sqlServerUrl;
 //sqlserver 用户名
 String sqlServerUserName;
 //sqlserver 密码
 String sqlServerPassword;

 public String getSqlServerDriverClassName(){
 return this.sqlServerDriverClassName;
 }

 public void setSqlServerDriverClassName(String sqlServerDriverClassName){
 this.sqlServerDriverClassName = sqlServerDriverClassName;
 }

 public String getSqlServerUrl(){
 return this.sqlServerUrl;
 }

 public void setSqlServerUrl(String sqlServerUrl){
 this.sqlServerUrl = sqlServerUrl;
 }

 public String getSqlServerUserName(){
 return this.sqlServerUserName;
 }

 public void setSqlServerUserName(String sqlServerUserName){
 this.sqlServerUserName = sqlServerUserName;
 }

 public String getSqlServerPassword(){
 return this.sqlServerPassword;
 }

 public void setSqlServerPassword(String sqlServerPassword){
 this.sqlServerPassword = sqlServerPassword;
 }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
 <bean id="DBParaProperty" class="com.DBParaProperty">
 <property name="sqlServerDriverClassName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"></property>
 <property name="sqlServerUrl" value="jdbc:sqlserver://127.0.0.1:1433;databaseName=test;"></property>
 <property name="sqlServerUserName" value="saDBParaProperty"></property>
 <property name="sqlServerPassword" value="admin123"></property>
 </bean>
</beans>

package test;

import com.DBParaConstructor;
import com.DBParaProperty;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping("/test2")
public class test2 {
 @RequestMapping("/test")
 @ResponseBody
 public Object test2() {
 //如果xml文件在src下面的话，直接写文件名就行
 ApplicationContext cpxac = new ClassPathXmlApplicationContext("DBParaProperty.xml");
 //根据bean节点的标识获取对象，id
 DBParaProperty dbParaProperty = (DBParaProperty) cpxac.getBean("DBParaProperty");
 System.out.println(dbParaProperty.getSqlServerUserName());

 return dbParaProperty.getSqlServerUserName();
 }
}

package com;

public class DBParaConstructor {
 //jdbc sqlserver 驱动类
 public String sqlServerDriverClassName;
 //sqlserver 连接地址
 public String sqlServerUrl;
 //sqlserver 用户名
 public String sqlServerUserName;
 //sqlserver 密码
 public String sqlServerPassword;

 public DBParaConstructor(){}

 public DBParaConstructor(String sqlServerDriverClassName,String sqlServerUrl,String sqlServerUserName,String sqlServerPassword){
 this.sqlServerDriverClassName = sqlServerDriverClassName;
 this.sqlServerUrl = sqlServerUrl;
 this.sqlServerUserName = sqlServerUserName;
 this.sqlServerPassword = sqlServerPassword;
 }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
 <bean id="DBParaConstructor" class="com.DBParaConstructor">
 <constructor-arg name="sqlServerDriverClassName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"></constructor-arg>
 <constructor-arg name="sqlServerUrl" value="jdbc:sqlserver://127.0.0.1:1433;databaseName=test;"></constructor-arg>
 <constructor-arg name="sqlServerUserName" value="saDBParaConstructor"></constructor-arg>
 <constructor-arg name="sqlServerPassword" value="admin456"></constructor-arg>
 </bean>
</beans>

package test;

import com.DBParaConstructor;
import com.DBParaProperty;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping("/test2")
public class test2 {
 @RequestMapping("/test")
 @ResponseBody
 public Object test2() {
 ApplicationContext cpxac = new ClassPathXmlApplicationContext("DBParaProperty.xml");
 DBParaProperty dbParaProperty = (DBParaProperty) cpxac.getBean("DBParaProperty");
 System.out.println(dbParaProperty.getSqlServerUserName());

 ApplicationContext acc = new ClassPathXmlApplicationContext("/test/DBParaConstructor.xml");
 DBParaConstructor dbParaConstructor = (DBParaConstructor)acc.getBean("DBParaConstructor");
 System.out.println(dbParaConstructor.sqlServerUserName);

 return dbParaProperty.getSqlServerUserName()+"*****"+dbParaConstructor.sqlServerUserName;
 }
}