commons-configuration读取配置文件

1. 1. import org.apache.commons.configuration.CompositeConfiguration; 
   2. import org.apache.commons.configuration.ConfigurationException;   
   3. import org.apache.commons.configuration.PropertiesConfiguration;   //读取properties配置文件
   4. import org.apache.commons.configuration.XMLConfiguration;   //读取xml文件
   5.   

   我们在实际的开发设计中,通常要读各种各样的配置文件,十分烦琐.然而commons-configuration-1.0.jar为我们提供了非常方便的操作方式实例如下:1.读取XML文件中内容

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   1. import java.util.List;   
   2. import org.apache.commons.configuration.Configuration;   
   3. import org.apache.commons.configuration.XMLConfiguration;   
   4.   
   5. public class XmlConfigurationExample {   
   6.   
   7. public static void main(String[] args) throws Exception {   
   8. String resource = "com/discursive/jccook/configuration/global.xml";   
   9. Configuration config = new XMLConfiguration(resource);   
   10. //只有new一个XMLConfiguration的实例就可以了.   
   11. List startCriteria = config.getList("start-criteria.criteria");   
   12. int horsepower = config.getInt("horsepower");   
   13. System.out.println( "Start Criteria: " + startCriteria );   
   14. System.out.println(horsepower);   
   15. }   
   16. }   

   
   

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   1. global.xml  
   2. <?xml version="1.0" encoding="ISO-8859-1" ?>   
   3.   
   4. <engine-config>   
   5. <start-criteria>   
   6. <criteria>   
   7. Temperature Above -10 Celsius   
   8. </criteria>   
   9. <criteria>   
   10. Fuel tank is not empty   
   11. </criteria>   
   12. </start-criteria>   
   13. <volume>4 Liters</volume>   
   14. <horsepower>42</horsepower>   
   15. </engine-config>   

   
   2.读取properties文件
   

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   1. import org.apache.commons.configuration.Configuration;   
   2. import org.apache.commons.configuration.PropertiesConfiguration;   
   3.   
   4. public class PropertiesConfigurationExample {   
   5.   
   6. public static void main(String[] args) throws Exception {   
   7. Configuration config = new PropertiesConfiguration(   
   8.   
   9. "com/discursive/jccook/configuration/global.properties" );   
   10.   
   11. System.out.println( "Speed: " + config.getFloat("speed"));   
   12. System.out.println( "Names: " + config.getString("name"));   
   13. }   
   14. }   

   
   

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   1. global.properties  
   2. threads.maximum=50   
   3. threads.minimum=20   
   4. timeout=15.52   
   5. interactive=true   
   6. color=red   
   7. speed=50   
   8. name=Default User   
   9. email=default@email.com   
   10. region=Earth   

   
   3.当有多个配置文件时,就利用ConfigurationFactory对象来访问多个不同的配置资源
   

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   1. import java.net.URL;   
   2. import java.util.List;   
   3.   
   4. import org.apache.commons.configuration.Configuration;   
   5. import org.apache.commons.configuration.ConfigurationFactory;   
   6.   
   7. public class PropertiesXmlConfigurationExample {   
   8.   
   9. public static void main(String[] args) throws Exception {   
   10. PropertiesXmlConfigurationExample example = new PropertiesXmlConfigurationExample();   
   11.   
   12. ConfigurationFactory factory = new ConfigurationFactory();   
   13. URL configURL = example.getClass().getResource("additional-xml-configuration.xml");   
   14. factory.setConfigurationURL( configURL );   
   15.   
   16. Configuration config = factory.getConfiguration();   
   17.   
   18. List startCriteria = config.getList("start-criteria.criteria");   
   19. System.out.println( "Start Criteria: " + startCriteria );   
   20.   
   21. int horsepower = config.getInt("horsepower");   
   22. System.out.println( "Horsepower: " + horsepower );   
   23. }   
   24. }   

   
   

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   1. additional-xml-configuration.xml  
   2. <?xml version="1.0" encoding="ISO-8859-1" ?>   
   3. <configuration>   
   4. <properties fileName="global.properties"/>   
   5. <xml fileName="global.xml"/>   
   6. </configuration>  

   
   4.CompositeConfiguration,手动加上两个配置文件
   

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   1. import org.apache.commons.configuration.CompositeConfiguration;   
   2. import org.apache.commons.configuration.ConfigurationException;   
   3. import org.apache.commons.configuration.PropertiesConfiguration;   
   4. import org.apache.commons.configuration.XMLConfiguration;   
   5.   
   6. public class Test {   
   7.   
   8. /**  
   9. * @param args  
   10. * @throws ConfigurationException  
   11. */   
   12. public static void main(String[] args) throws ConfigurationException {   
   13. // TODO Auto-generated method stub   
   14. CompositeConfiguration config = new CompositeConfiguration();   
   15. config.addConfiguration(new PropertiesConfiguration(   
   16.   
   17. "com/discursive/jccook/configuration/global.properties" ));   
   18. config.addConfiguration( new XMLConfiguration   
   19.   
   20. ("com/discursive/jccook/configuration/global.xml"));   
   21. List startCriteria = config.getList("start-criteria.criteria");   
   22. int horsepower = config.getInt("horsepower");   
   23. System.out.println( "Start Criteria: " + startCriteria );   
   24. System.out.println(horsepower);   
   25.   
   26. System.out.println( "Speed: " + config.getFloat("speed"));   
   27. System.out.println( "Names: " + config.getString("name"));   
   28.   
   29. }   
   30.   
   31. }   
   32. 
       
       来源： http://blog.****.net/zztp01/article/details/6707928

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