config配置文件，多源读取

发布日期：2009-9-25 8:02:48

• • 实现：config文件有多个地方，按照优先次序依次查找，按照第一个找到的config来应用程序。

  • 具体代码：覆盖spring类，建立类CustomPropertyPlaceholderConfigurer.java

• 1. package com.XXX.config;

  2. import java.util.ArrayList;

  3. import java.util.List;

  4. import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;

  5. import org.springframework.core.io.Resource;

  6. public class CustomPropertyPlaceholderConfigurer extends PropertyPlaceholderConfigurer {

  7. @Override

  8. public void setLocations(Resource[] locations) {

  9. List<Resource> existResourceList = new ArrayList<Resource>();

  10. for (int i = locations.length-1; i >=0 ; i--) {

  11. Resource resource = locations[i];

  12. if(resource.exists())

  13. existResourceList.add(resource);

  14. }

  15. Resource[] existResource = new Resource[existResourceList.size()];

  16. super.setLocations(existResourceList.toArray(existResource));

  17. }

  18. }

• • spring配置文件中使用：

• 1. <bean class="com.XXX.config.CustomPropertyPlaceholderConfigurer">

  2. <property name="locations">

  3. <list>

  4. <value>file:./config.properties</value>

  5. <value>classpath:/config/config.properties</value>

  6. </list>

  7. </property>

  8. </bean>

  9. <bean id="dataSource_XXX_db"

  10. class="org.apache.commons.dbcp.BasicDataSource">

  11. <property name="driverClassName">

  12. <value>com.mysql.jdbc.Driver</value>

  13. </property>

  14. <property name="url">

  15. <value>${jdbc.XXX_db.url}</value>

  16. </property>

  17. <property name="username">

  18. <value>${jdbc.XXX_db.username}</value>

  19. </property>

  20. <property name="password">

  21. <value>${jdbc.XXX_db.password}</value>

  22. </property>

  23. </bean>