Spring 运行时获得配置文件中参数的方法

        在开发系统时,有时需要给系统设置一些可以灵活配置的参数,比如上传文件的根路径等,可采用下列方法(开发环境:SpringSource Tool Suite , Spring 3.1)

        1、  新建一Mavn项目constant

        2、  在src/main/resources目录中新建文件application.properties,内容如下:

                rootpath=C:\files\

        3、  在同一目录下新建文件root-context.xml,内容如下:

                xmlversion="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-3.0.xsd">

               <bean id="propertyConfigurer"      class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">

                               <property name="location">

                                               <value>classpath:application.propertiesvalue>

                               property>

               bean> 

               <bean id="constantUtils"class="com.huaxing.constant.ConstantUtils">

                               <property name="rootPath"value="${rootPath}"/>

               bean>

beans>

 

        4、  在com.huaxing.constant包中新建文件COnstantUtils.java,内容如下:

               public class ConstantUtils {

                       private String rootPath;

                       public String getRootPath() {

                               returnrootPath;

                       }

                       public void setRootPath(String rootPath) {

                               this.rootPath = rootPath;

                       }

               }

 

       5、  编写测试类

               @RunWith(SpringJUnit4ClassRunner.class)

               @ContextConfiguration(locations = {"file:src/main/resources/root-*.xml" })

               public class ConstantTest {

                       @Autowired

                       @Qualifier("constantUtils")

                       private ConstantUtilsconstantUtils;

 

                       @Test

                       publicvoid testConstant() {

                               System.out.println(constantUtils.getRootPath());

                       }

               }

       运行该测试类,即可得出结果。

 

(如有错误及其他实现方法,欢迎指出!)

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