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();
         }
     }
 }