Properties读取properties配置文件

 package cn.rocker.readProperties;

 import java.io.IOException;

 import java.io.InputStream;

 import java.net.URL;

 import java.util.Properties;

 import org.junit.Test;

 import org.springframework.core.io.support.PropertiesLoaderUtils;

 /**

 * @ClassName: PropertiesRead

 * @Description: Properties读取配置文件

 * @author 112

 * @date 2018年3月28日 下午12:46:07

 */

 public class PropertiesRead {

     @Test

     /**

      * @Description:  第一种方式：根据文件名使用spring中的工具类PropertiesLoaderUtils进行解析

      *                filePath是相对路径，文件需在classpath目录下

      *                此处为：cn/rocker/readProperties/test/properties/cas.properties

      * @author czc

      * @date 2018年3月28日 下午1:19:57

      * @version V1.0

      */

     public void PropertiesLoaderUtilsReadProperties(){

         Properties prop = null;

         String propertiesPath = "cn/rocker/readProperties/test/properties/cas.properties";

         try {

             prop = PropertiesLoaderUtils.loadAllProperties(propertiesPath);

             String url = prop.getProperty("UnifyUserManager_URL");

             System.out.println(url);

             //输出：http://139.199.20:8080/sso/UnifyUserManager

         } catch (IOException e) {

             e.printStackTrace();

         }

     }

     @Test

     /**

      * @Description: 这里贴一下getResourceAsStream方法的源码注释

      * Before delegation, an absolute resource name is constructed from

      * the given resource name using this algorithm:

        • If the name begins with a '/' ('\u002f'), then

        the absolute name of the resource is the portion of the name following the '/'.

        • Otherwise, the absolute name is of the following form: modified_package_name/name

              如果getResourceAsStream的参数以"/"开始，则文件的绝对路径就是/后面的部分

              如果getResourceAsStream的参数没有以"/"开始,则文件的路径跟操作文件的类在同一包路径下

      * @author czc

      * @date 2018年3月28日 下午1:36:34

      * @version V1.0

      */

     public void ResoueceStreamReadProperties(){

         Properties prop = new Properties();

         String propertiesPath1 = "cas1.properties";

         String propertiesPath2 = "/cas2.properties";

         String propertiesPaht3 = "/cn/rocker/readProperties/test/properties/cas3.properties";

         try {

             InputStream inputStream1 = PropertiesRead.class.getResourceAsStream(propertiesPath1);

             prop.load(inputStream1);

             String url1 = prop.getProperty("UnifyUserManager_URL");

             System.out.println("url1:" + url1);

             InputStream inputStream2 = PropertiesRead.class.getResourceAsStream(propertiesPath2);

             prop.load(inputStream2);

             String url2 = prop.getProperty("UnifyUserManager_URL");

             System.out.println("url2:" + url2);

             InputStream inputStream3 = PropertiesRead.class.getResourceAsStream(propertiesPaht3);

             prop.load(inputStream3);

             String url3 = prop.getProperty("UnifyUserManager_URL");

             System.out.println("url3:" + url3);

             //输出：url1:http://139.199.20:8080/sso/UnifyUserManager

             //     url2:http://139.199.20:8080/sso/UnifyUserManager

             //     url3:http://139.199.20:8080/sso/UnifyUserManager

         } catch (IOException e) {

             e.printStackTrace();

         }

     }

 }