读取property文件的Util类：

 

所需jar包：

编写PropertiesUtil类：

 

 

package com.west.util.property;import java.io.InputStream;import java.util.HashMap;import java.util.Map;import java.util.Properties;import org.apache.log4j.Logger;/** * 工具类： 操作Property文件 *  */public class PropertiesUtil {    private static Logger logger = Logger.getLogger(PropertiesUtil.class);    private static Map
     
       propertyMap = new HashMap
      
       ();    private static Properties objProperties = null;    private PropertiesUtil() {    }    /**     * 通过fileName、key获取value     */    public static String getValueByNameAndKey(String fileName, String key) {        String rt = null;        if (objProperties == null) {            objProperties = gerProperties(fileName);        }        if (objProperties != null) {            rt = objProperties.getProperty(key);        }        return rt;    }        /**     * 通过property文件名：加载properties     */    public synchronized static Properties gerProperties(String fileName) {        Properties properties = propertyMap.get(fileName);        if (properties == null) {            properties = new Properties();            // 加载            InputStream in = PropertiesUtil.class.getClassLoader()                    .getResourceAsStream(fileName);            System.out.println(in);            try {                properties.load(in);            } catch (Exception e) {                e.printStackTrace();                logger.error(e);            }        }        return properties;    }}
      
     

 

编写：message.properties文件

 

编写测试类：

package com.west.util.property;import org.junit.Test;public class PropertiesUtilTest {    @Test    public void test() {        String value=PropertiesUtil.getValueByNameAndKey("message.properties","west");        System.out.println(value);    }}